Thanos sort is a supervillain sorting algorithm, which works as follows: if the array is not sorted, snap your fingers* to remove the first or the second half of the items, and repeat the process.

Given an input array, what is the size of the longest sorted array you can obtain from it using Thanos sort?

*Infinity Gauntlet required.


-----Input-----

The first line of input contains a single number $n$ ($1 \le n \le 16$) — the size of the array. $n$ is guaranteed to be a power of 2.

The second line of input contains $n$ space-separated integers $a_i$ ($1 \le a_i \le 100$) — the elements of the array.


-----Output-----

Return the maximal length of a sorted array you can obtain using Thanos sort. The elements of the array have to be sorted in non-decreasing order.


-----Examples-----
Input
4
1 2 2 4

Output
4

Input
8
11 12 1 2 13 14 3 4

Output
2

Input
4
7 6 5 4

Output
1



-----Note-----

In the first example the array is already sorted, so no finger snaps are required.

In the second example the array actually has a subarray of 4 sorted elements, but you can not remove elements from different sides of the array in one finger snap. Each time you have to remove either the whole first half or the whole second half, so you'll have to snap your fingers twice to get to a 2-element sorted array.

In the third example the array is sorted in decreasing order, so you can only save one element from the ultimate destruction.

Difficulty: MEDIUM
Tags: Implementation

Starter code:

Solutions:
def sort(array):
	for n in range(len(array) - 1):
		if array[n + 1] < array[n]:
			return False
	return True

def del_1(n, array):
	del array[0:int(n / 2)]
	return array

def del_2(n, array):
	del array[int(n / 2):len(array)]
	return array

def thanos_sort(n, array):
	if n == 1:
		return 1
	elif sort(array):
		return len(array)
	else:
		array1 = array.copy()
		array2 = array.copy()
		a = del_1(len(array1), array1)
		b = del_2(len(array2), array2)
		x = thanos_sort(len(a), a)
		y = thanos_sort(len(b), b)
		if x > y:
			return x
		else:
			return y
n = int(input())
array = list(map(int, input().split()))
print(thanos_sort(n, array))


n = int(input())
s = input()
a = list(map(int, s.split()))
a1 = []
a2 = []
b = []

def TanosSorting(a):
	if len(a) > 1:
		counter = 0
		for i in range(len(a) - 1):
			if a[i] > a[i + 1]:
				break
			else:
				counter += 1
		if counter == len(a) - 1:
			b.append(len(a))
		else:
			a1 = []
			a2 = []
			for i in range(len(a) // 2):
				a1.append(a[i])
				a2.append(a[len(a) // 2 + i])
			TanosSorting(a1)
			TanosSorting(a2)
	else:
		b.append(1)
TanosSorting(a)
print(max(b))


n = int(input())
array = str(input()).split(' ')
n0 = n
strt_of_grp = 0
out = 1
while n > 1:
	for i in range(1, int(n0 / n) + 1):
		for j in range(strt_of_grp, n * i - 1):
			if int(array[j + 1]) >= int(array[j]):
				out += 1
				if out == n:
					print(out)
					exit()
					out = 1
			else:
				out = 1
				break
		strt_of_grp += n
	strt_of_grp = 0
	n = int(n / 2)
print(out)


length = int(input())
arr = input().split()
for i in range(len(arr)):
	arr[i] = int(arr[i])

def isSorted(start, end):
	for i in range(start, end):
		if arr[i] > arr[i + 1]:
			return False
	return True
count = 0
flag = False
while True:
	iteration = int(length / 2 ** count)
	if iteration == 1:
		break
	for i in range(2 ** count):
		if isSorted(i * iteration, (i + 1) * iteration - 1):
			flag = True
			break
	if flag:
		break
	else:
		count += 1
print(iteration)


import math

def thanosSort(arr):
	mas = []
	t = 1
	length = 1
	for i in range(int(math.log(len(arr)) / math.log(2))):
		t *= 2
		for j in range(len(arr) // t):
			start = j * t
			stop = j * t + t
			mas.append(arr[start:stop])
	for e in mas:
		if e == sorted(e):
			if len(e) > length:
				length = len(e)
	return length
n = int(input())
arr = list(map(int, input().split()))
print(thanosSort(arr))


def rec(arr, temp):
	temp.sort()
	if len(temp) == 1:
		return 1
	if temp == arr:
		return len(temp)
	else:
		temp = arr[:]
		return max(rec(arr[:int(len(arr) / 2)], temp[:int(len(arr) / 2)]), rec(arr[int(len(arr) / 2):len(arr)], temp[int(len(arr) / 2):len(arr)]))
n = int(input())
arr = list(map(int, input().split()))
temp = arr[:]
print(rec(arr, temp))


n = int(input())
a = list(map(int, input().split()))
d = 1
dd = [1]
s = 1
ss = [1]
e = 0
for i in range(5):
	if len(a) == 1:
		print(1)
		break
	if a == sorted(a):
		print(len(a))
		break
	else:
		for i in range(len(a) // 2 - 1):
			if a[i] <= a[i + 1]:
				d += 1
			else:
				dd.append(d)
				d = 1
			dd.append(d)
		for i in range(len(a) // 2, len(a) - 1):
			if a[i] <= a[i + 1]:
				s += 1
			else:
				ss.append(s)
				s = 1
			ss.append(s)
		if max(dd) >= max(ss):
			for i in range(len(a) // 2):
				a.pop()
		else:
			for i in range(len(a) // 2):
				a.pop(0)
		s = 1
		d = 1
		dd = [1]
		ss = [1]


def thanosSort(arr):
	if sorted(arr) == arr:
		return len(arr)
	k = len(arr) // 2
	return max(thanosSort(arr[:k]), thanosSort(arr[k:]))
n = int(input())
arr = list(map(int, input().split()))
print(thanosSort(arr))


import sys
n = int(input())
length = n
nums = list(map(int, input().split(' ')))
while n > 1:
	for i in range(0, length, n):
		if nums[i:i + n] == sorted(nums[i:i + n]):
			print(n)
			sys.exit(0)
	n = n // 2
print(1)


def check_sort(A):
	for i in range(len(A) - 1):
		if A[i] > A[i + 1]:
			return False
	global long
	long = 2
	return True

def next_step(A, k):
	global prov
	prov = 0
	B = []
	for i in range(len(A) // 2):
		if (A[2 * i] and A[2 * i + 1]) and C[2 * i * k + k - 1] <= C[2 * i * k + k]:
			B.append(True)
			prov = 1
		else:
			B.append(False)
	return B
n = int(input())
global long
long = 1
C = [*map(int, input().split())]
D = []
for i in range(len(C) // 2):
	D.append(check_sort(C[2 * i:2 * i + 2]))
if long == 1:
	print(long)
else:
	prov = 1
	K = []
	while prov == 1:
		K = [*next_step(D, long)]
		long = long * 2
		D.clear()
		D = [*K]
	print(long // 2)


def tanos(l):
	if l == sorted(l):
		return len(l)
	return max(tanos(l[:len(l) // 2]), tanos(l[len(l) // 2:]))
n = int(input())
a = list(map(int, input().split()))
print(tanos(a))


def Thanos(l):
	if l == sorted(l):
		return len(l)
	return max(Thanos(l[:len(l) // 2]), Thanos(l[len(l) // 2:]))
n = int(input())
l = list(map(int, input().split()))
print(Thanos(l))


n = int(input())
array = list(map(int, input().split()))

def Thanos_Sort(arr):
	if arr == sorted(arr):
		return len(arr)
	return max(Thanos_Sort(arr[:len(arr) // 2]), Thanos_Sort(arr[len(arr) // 2:]))
print(Thanos_Sort(array))


import unittest
import os
import sys
import math

class Tests(unittest.TestCase):

	def test1(self):
		f1 = open('tests/1.txt', 'r')
		f2 = open('tests/1a.txt', 'r')
		sys.stdin = f1
		self.assertEqual(main(), f2.read().strip(), 'test №1')
		f1.close()
		f2.close()

	def test2(self):
		f1 = open('tests/2.txt', 'r')
		f2 = open('tests/2a.txt', 'r')
		sys.stdin = f1
		self.assertEqual(main(), f2.read().strip(), 'test №2')
		f1.close()
		f2.close()

	def test3(self):
		f1 = open('tests/3.txt', 'r')
		f2 = open('tests/3a.txt', 'r')
		sys.stdin = f1
		self.assertEqual(main(), f2.read().strip(), 'test №3')
		f1.close()
		f2.close()
a = 1

def rec(mas):
	global a
	if len(mas) == 1:
		return
	if mas == sorted(mas):
		if len(mas) > a:
			a = len(mas)
			return
	rec(mas[:len(mas) // 2])
	rec(mas[len(mas) // 2:])
	return

def main():
	global a
	a = 1
	n = int(input())
	mas = list(map(int, input().split(' ')))
	rec(mas)
	return str(a)
print(main())


n = int(input())
a = list(map(int, input().split()))
l = [1, 2, 4, 8, 16]
f = []
m = 0
for i in range(0, l.index(n) + 1):
	for j in range(0, len(a) - 2 ** i + 1, 2 ** i):
		f.append(a[j:j + 2 ** i])
for i in range(len(f)):
	k = f[i]
	a = k * 1
	a.sort()
	if k == a:
		m = max(m, len(k))
print(m)


n = int(input())
arr = list(map(int, input().split()))

def isSorted(arr):
	for i in range(1, len(arr)):
		if arr[i] < arr[i - 1]:
			return False
	return True

def foo(arr):
	l = len(arr)
	if l == 1:
		return 1
	if isSorted(arr):
		return l
	m = l // 2
	return max(foo(arr[:m]), foo(arr[m:]))
print(foo(arr))


import sys
from sys import stdin
mem = dict()

def solve(A):
	global mem
	ans = 0
	N = len(A)
	if all((A[i] <= A[i + 1] for i in range(N - 1))):
		ans = N
	else:
		mid = N // 2
		(A1, A2) = (A[0:mid], A[mid:N])
		ans = max(solve(A1), solve(A2))
	return ans

def main():
	stdin.readline()
	A = [int(x) for x in stdin.readline().strip().split()]
	print(solve(A))
main()


def isSorted(arr, i, n):
	c = 0
	k = n - i
	if k == 1:
		return True
	for j in range(i, n - 1):
		if arr[j] <= arr[j + 1]:
			c += 1
	return c == k - 1

def solve(arr, n):
	k = n
	while k >= 1:
		i = 0
		while i < n:
			if isSorted(arr, i, i + k):
				return k
			i = i + k
		k = k // 2
	if k == 1:
		return k
n = int(input())
y = [int(i) for i in input().split()]
print(solve(y, n))


def max_sort_len(a):
	if len(a) == 1:
		return 1
	if len(a) == 2:
		if a[0] <= a[1]:
			return 2
		else:
			return 1
	half_len = len(a) // 2
	lh = a[:half_len]
	rh = a[half_len:]
	lh_max = max_sort_len(lh)
	rh_max = max_sort_len(rh)
	if lh_max == rh_max == half_len and lh[-1] <= rh[0]:
		return lh_max * 2
	return max(lh_max, rh_max)

def main():
	input()
	arr = [int(i) for i in input().split(' ')]
	print(max_sort_len(arr))
main()


def isSorted(a, b):
	issort = True
	for x in range(b - 1):
		if a[x] > a[x + 1]:
			issort = False
	return issort

def findmax(a, b):
	global maxarr
	if isSorted(a, b):
		maxarr = max(maxarr, b)
	if b == 1:
		return
	b //= 2
	findmax(a[:b], b)
	findmax(a[b:], b)
n = int(input())
a = list(map(int, input().split()))
maxarr = -1
findmax(a, n)
print(maxarr)


m = n = int(input())
a = [*map(int, input().split())]
while all((a[i:i + m] > sorted(a[i:i + m]) for i in range(0, n, m))):
	m //= 2
print(m)


def step(ll):
	if ll == sorted(ll):
		return len(ll)
	return max(step(ll[:len(ll) // 2]), step(ll[len(ll) // 2:]))
n = int(input())
l = list(map(int, input().split()))
print(step(l))


def solve(l, r, arr):
	if r < l:
		return 0
	if l == r:
		return 1
	f = 0
	for i in range(l + 1, r + 1):
		if arr[i] < arr[i - 1]:
			f = 1
			break
	if f == 0:
		return r - l + 1
	mid = l + (r - l) // 2
	return max(solve(l, mid, arr), solve(mid + 1, r, arr))
n = int(input())
arr = list(map(int, input().split()))
print(solve(0, n - 1, arr))


Answer = []

def DFS(List):
	if List == sorted(List):
		Answer.append(len(List))
		return
	DFS(List[:len(List) // 2])
	DFS(List[len(List) // 2:])
N = int(input())
X = list(map(int, input().split()))
DFS(X)
print(max(Answer))


import sys
N = int(sys.stdin.readline())
arr = [int(x) for x in sys.stdin.readline().split()]

def helper(a, x, y, d):
	if x > y or y - x == 1:
		return d
	m = x + (y - x) // 2
	d_l = helper(a, x, m, d + 1)
	d_r = helper(a, m, y, d + 1)
	if d_l == d_r == d + 1 and a[m] >= a[m - 1]:
		return d
	if d_l > d_r:
		return d_r
	elif d_r > d_l:
		return d_l
	return d_l
res = helper(arr, 0, len(arr), 0)
if res == 0:
	print(N)
else:
	print(N // (2 * res))


def is_sorted(array):
	for i in range(len(array) - 1):
		if array[i] > array[i + 1]:
			return False
	return True

def thanos_sort(array):
	if is_sorted(array):
		return len(array)
	middle = int(len(array) / 2)
	return max(thanos_sort(array[0:middle]), thanos_sort(array[middle:]))
n = int(input())
array = list(map(int, input().split()))
print(thanos_sort(array))


init_len = input()
init_list = list(map(int, input().split()))

def check_sorted(a):
	return all((a[i] <= a[i + 1] for i in range(len(a) - 1)))

def thanos_sort(a):
	if check_sorted(a):
		return len(a)
	else:
		return max(thanos_sort(a[:len(a) // 2]), thanos_sort(a[len(a) // 2:]))
print(thanos_sort(init_list))


def check_th(f):
	if sorted(f) == f:
		return len(f)
	else:
		return max(check_th(f[:len(f) // 2]), check_th(f[len(f) // 2:]))
n = int(input())
s = [int(i) for i in input().split()]
print(check_th(s))


def sor(a, n):
	for i in range(1, n):
		if a[i - 1] > a[i]:
			return False
	return True

def tha(a, n):
	if sor(a, n):
		return n
	else:
		m = n // 2
		a1 = a[0:m]
		a2 = a[m:n]
		return max(tha(a1, m), tha(a2, m))
n = int(input())
a = list(map(int, input().split()))
print(tha(a, n))


n = int(input())
array = str(input()).split(' ')
n_n = []
while n > 1:
	n_n.append(n)
	n = int(n / 2)
array_res = []
step = 0
check = 1
for element in n_n:
	for i in range(1, int(n_n[0] / element) + 1):
		for j in range(step, element * i - 1):
			if int(array[j + 1]) >= int(array[j]):
				check += 1
				if check == element:
					array_res.append(check)
					print(array_res[0])
					exit()
					check = 1
			else:
				check = 1
				break
		check = 1
		step += element
	step = 0
if len(array_res) > 0:
	print(array_res[0])
else:
	print(1)


n = int(input())
arr1 = list(map(int, input().split()))

def snappy(arr1):
	if arr1 == sorted(arr1):
		return len(arr1)
	else:
		k = len(arr1) // 2
		return max(snappy(arr1[:k]), snappy(arr1[k:]))
print(snappy(arr1))


def isSorted(arr):
	prev = float('-inf')
	for x in arr:
		if x < prev:
			return False
		prev = x
	return True

def findAns(arr):
	if isSorted(arr):
		return len(arr)
	else:
		length1 = findAns(arr[0:int(len(arr) / 2)])
		length2 = findAns(arr[int(len(arr) / 2):len(arr)])
		if length1 > length2:
			return length1
		else:
			return length2
n = input()
input_arr = input().split(' ')
input_int_arr = []
for x in input_arr:
	input_int_arr.append(int(x))
print(findAns(input_int_arr))


n = int(input())
arr = list(map(int, input().split()))
mx = 1

def solve(a, b):
	global mx
	if a == b:
		return True
	m = (a + b) // 2
	ll = solve(a, m)
	rr = solve(m + 1, b)
	if ll == True and rr == True and (arr[m] <= arr[m + 1]):
		mx = max(mx, b - a + 1)
		return True
	return False
solve(0, n - 1)
print(mx)


def snap(a):
	if a == sorted(a):
		return len(a)
	else:
		k = len(a) // 2
		return max(snap(a[:k]), snap(a[k:]))
n = int(input())
a = [int(s) for s in input().split()]
print(snap(a))


sorted_arrays = []

def sorter(a):
	good = True
	for i in range(len(a) - 1):
		if a[i] > a[i + 1]:
			good = False
			break
	if good:
		sorted_arrays.append(a)
		return
	sorter(a[:len(a) // 2])
	sorter(a[len(a) // 2:])
n = input()
numbers = input().split(' ')
sorter([int(n) for n in numbers])
print(max([len(i) for i in sorted_arrays]))


def is_sorted(l):
	return all((l[i] <= l[i + 1] for i in range(len(l) - 1)))

def thanos_sort(l, snapToTheLeft):
	if is_sorted(l):
		return l
	else:
		if snapToTheLeft:
			snappedList = l[:int(len(l) / 2)]
		else:
			snappedList = l[int(len(l) / 2):]
		leftSort = thanos_sort(snappedList, True)
		rightSort = thanos_sort(snappedList, False)
		return leftSort if len(leftSort) > len(rightSort) else rightSort

def largest_thanos_sorted_list(l):
	leftSort = len(thanos_sort(l, True))
	rightSort = len(thanos_sort(l, False))
	return leftSort if leftSort > rightSort else rightSort
input()
values = list(map(int, input().split()))
print(largest_thanos_sorted_list(values))


n = input()
n = int(n)
a = input()
a = a.split(' ')
a = [int(x) for x in a]

def isSorted(test_list):
	if all((test_list[i] <= test_list[i + 1] for i in range(len(test_list) - 1))):
		return True
	else:
		return False

def thanosSort(arr):
	if len(arr) == 0:
		return 0
	elif isSorted(arr):
		return len(arr)
	else:
		half = int(len(arr) / 2)
		return max(thanosSort(arr[:half]), thanosSort(arr[half:]))
print(thanosSort(a))


n = int(input())
arr = input().split(' ')
arr = [*map(int, arr)]
while arr != sorted(arr):
	l = len(arr) // 2
	f = arr[:l]
	s = arr[l:]
	if f == sorted(f):
		arr = arr[:l]
	elif s == sorted(s):
		arr = arr[l:]
	else:
		arr = arr[l:]
print(len(arr))


n = int(input())
arr = list(map(int, input().split()))

def solve(arr):
	if arr == sorted(arr):
		return len(arr)
	left = solve(arr[:len(arr) // 2])
	right = solve(arr[len(arr) // 2:])
	return max(left, right)
print(solve(arr))


from sys import stdin
n = int(stdin.readline().strip())
s = list(map(int, stdin.readline().strip().split()))

def cre(a, b):
	for i in range(a + 1, b):
		if s[i - 1] > s[i]:
			return False
	return True

def sol(a, b):
	if b - a == 1:
		return 1
	if cre(a, b):
		return b - a
	return max(sol(a, (a + b) // 2), sol((a + b) // 2, b))
print(sol(0, n))


input()
array = [int(x) for x in input().split(' ')]

def is_sorted(array):
	if len(array) == 1:
		return 1
	elif sorted(array) == array:
		return len(array)
	else:
		a = is_sorted(array[len(array) // 2:])
		b = is_sorted(array[:len(array) // 2])
		return a if a > b else b
print(is_sorted(array))


def isSorted(lista):
	for i in range(1, len(lista)):
		if lista[i - 1] > lista[i]:
			return (False, i)
	return (True, len(lista))

def f(lista):
	if isSorted(lista)[0]:
		return len(lista)
	middle = len(lista) // 2
	first_ = isSorted(lista[:middle])
	second_ = isSorted(lista[middle:])
	if first_[1] > second_[1]:
		return f(lista[:middle])
	return f(lista[middle:])
t = int(input())
lista = [int(x) for x in input().split()]
print(f(lista))


def solve(arr):
	if arr != sorted(arr):
		mid = (len(arr) + 1) // 2
		return max(solve(arr[:mid]), solve(arr[mid:]))
	return len(arr)
n = int(input())
arr = list(map(int, input().split()))
print(solve(arr))


def f(a):
	if sorted(a) == a:
		return len(a)
	k = len(a) // 2
	return max(f(a[:k]), f(a[k:]))
n = int(input())
a = list(map(int, input().split()))
print(f(a))


n = int(input())
arr = [int(x) for x in input().split()]
if n == 1:
	print(1)
else:
	for i in (16, 8, 4, 2):
		if i > n:
			continue
		for k in range(0, n, i):
			if sorted(arr[k:k + i]) == arr[k:k + i]:
				print(i)
				return
	print(1)
	return


a = int(input())
b = list(map(int, input().split()))
c = []
d = 1
if a == 1:
	print(1)
elif a == 2:
	if b[0] <= b[1]:
		print(2)
	else:
		print(1)
elif a == 4:
	if b[0] <= b[1] and b[1] <= b[2] and (b[2] <= b[3]):
		print(4)
	elif b[0] <= b[1] or b[2] <= b[3]:
		print(2)
	else:
		print(1)
elif a == 8:
	if b[0] <= b[1] and b[1] <= b[2] and (b[2] <= b[3]) and (b[3] <= b[4]) and (b[4] <= b[5]) and (b[5] <= b[6]) and (b[6] <= b[7]):
		print(8)
	elif b[0] <= b[1] and b[1] <= b[2] and (b[2] <= b[3]) or (b[4] <= b[5] and b[5] <= b[6] and (b[6] <= b[7])):
		print(4)
	elif b[0] <= b[1] or b[2] <= b[3] or b[4] <= b[5] or (b[6] <= b[7]):
		print(2)
	else:
		print(1)
elif b[0] <= b[1] and b[1] <= b[2] and (b[2] <= b[3]) and (b[3] <= b[4]) and (b[4] <= b[5]) and (b[5] <= b[6]) and (b[6] <= b[7]) and (b[7] <= b[8]) and (b[8] <= b[9]) and (b[9] <= b[10]) and (b[10] <= b[11]) and (b[11] <= b[12]) and (b[12] <= b[13]) and (b[13] <= b[14]) and (b[14] <= b[15]):
	print(16)
elif b[0] <= b[1] and b[1] <= b[2] and (b[2] <= b[3]) and (b[3] <= b[4]) and (b[4] <= b[5]) and (b[5] <= b[6]) and (b[6] <= b[7]) or (b[8] <= b[9] and b[9] <= b[10] and (b[10] <= b[11]) and (b[11] <= b[12]) and (b[12] <= b[13]) and (b[13] <= b[14]) and (b[14] <= b[15])):
	print(8)
elif b[0] <= b[1] and b[1] <= b[2] and (b[2] <= b[3]) or (b[4] <= b[5] and b[5] <= b[6] and (b[6] <= b[7])) or (b[8] <= b[9] and b[9] <= b[10] and (b[10] <= b[11])) or (b[12] <= b[13] and b[13] <= b[14] and (b[14] <= b[15])):
	print(4)
elif b[0] <= b[1] or b[2] <= b[3] or b[4] <= b[5] or (b[6] <= b[7]) or (b[7] <= b[8]) or (b[8] <= b[9]) or (b[9] <= b[10]) or (b[10] <= b[11]) or (b[11] <= b[12]) or (b[12] <= b[13]) or (b[13] <= b[14]) or (b[14] <= b[15]):
	print(2)
else:
	print(1)


n = int(input())
l = list(map(int, input().split()))
t = 1 / 2
a = 1
while True:
	t *= 2
	t = int(t)
	for i in range(t):
		if l[i * n // t:(i + 1) * n // t] == sorted(l[i * n // t:(i + 1) * n // t]):
			a = 2
			break
	if a == 2:
		break
print(int(n / t))


def isSort(l):
	s = l.copy()
	s.sort()
	if s == l:
		m.append(len(l))
	else:
		(isSort(l[:len(l) // 2]), isSort(l[len(l) // 2:]))
n = int(input())
l = list(map(int, input().split()))
m = []
isSort(l)
print(max(m))


input()
a = input().split()
a = [int(i) for i in a]

def check(l, r):
	if r == l + 1:
		return 1
	x = check(l, (l + r) // 2)
	y = check((l + r) // 2, r)
	if x == y and y == (r - l) // 2 and (a[(l + r) // 2 - 1] <= a[(l + r) // 2]):
		return r - l
	else:
		return max(x, y)
print(check(0, len(a)))


n = int(input())
c = list(map(int, input().split()))

def bp(c):
	d = len(c)
	if d == 2:
		if c[0] <= c[1]:
			return 2
		else:
			return 1
	left = bp(c[:d // 2])
	right = bp(c[d // 2:])
	if left == right == d // 2 and c[d // 2 - 1] <= c[d // 2]:
		return d
	return max(left, right)
if n == 1:
	print(1)
else:
	print(bp(c))


n = int(input())

def fun(x, n):
	if sorted(x) == x:
		return n
	n //= 2
	return max(fun(x[:n], n), fun(x[n:], n))
print(fun(list(map(int, input().strip().split())), n))


from collections import defaultdict as dd
import math
import heapq

def nn():
	return int(input())

def li():
	return list(input())

def mi():
	return map(int, input().split())

def lm():
	return list(map(int, input().split()))
n = nn()
ints = lm()
string = [0] * n
for (i, num) in enumerate(ints):
	if i == 0:
		string[0] = 1
	elif num >= ints[i - 1]:
		string[i] = string[i - 1] + 1
	else:
		string[i] = 1
po = 0
mstreak = 0
while 2 ** po <= n:
	start = 0
	while start * 2 ** po < n:
		if string[start * 2 ** po - 1] >= 2 ** po:
			mstreak = 2 ** po
		start += 1
	po += 1
print(mstreak)


def is_not_decreasing(array):
	for i in range(len(array) - 1):
		if array[i] > array[i + 1]:
			return False
	return True

def thanos_sort(array):
	global ans
	if is_not_decreasing(array):
		ans = max(ans, len(array))
	else:
		len_array = len(array)
		thanos_sort(array[:len_array // 2])
		thanos_sort(array[len_array // 2:])
N = int(input())
ans = 0
thanos_sort(list(map(int, input().split())))
print(ans)


n = input()
b = input().split()
a = list(map(int, b))

def thanos(array, size):
	x = int(size) // 2
	if array == sorted(array):
		return len(array)
	else:
		return max(thanos(array[:x], x), thanos(array[x:], x))
	return None
print(thanos(a, n))


def ThanosSort(arr, l):
	if sorted(arr) == arr:
		return l
	return max(ThanosSort(arr[:l // 2], l // 2), ThanosSort(arr[l // 2:], l // 2))
n = int(input())
arr = list(map(int, input().split()))
print(ThanosSort(arr, n))


n = int(input())
mas = list(map(int, input().split()))
while True:
	count2 = 0
	count1 = 0
	tmp1 = 1
	tmp2 = 1
	n = len(mas)
	for i in range(len(mas)):
		if i != n - 1:
			if i < int(n / 2):
				if i != int(n / 2) - 1:
					if mas[i] <= mas[i + 1]:
						tmp1 += 1
					elif tmp1 >= count1:
						count1 = tmp1
						tmp1 = 1
					if i == int(n / 2) - 1:
						if tmp1 >= count1:
							count1 = tmp1
							tmp1 = 1
				elif tmp1 >= count1:
					count1 = tmp1
					tmp1 = 1
			else:
				if mas[i] <= mas[i + 1]:
					tmp2 += 1
				elif tmp2 >= count2:
					count2 = tmp2
					tmp2 = 1
				if i == n - 1:
					if tmp2 >= count2:
						count2 = tmp2
						tmp2 = 1
		elif tmp2 >= count2:
			count2 = tmp2
			tmp2 = 1
	if len(mas) == 1:
		break
	if count2 < count1:
		if count1 == n - 1:
			break
		del mas[int(n / 2):]
	elif count2 > count1:
		if count2 == n - 1:
			break
		del mas[:int(n / 2)]
	elif count1 == n / 2 and count2 == n / 2:
		if mas[int(n / 2 - 1)] <= mas[int(n / 2)]:
			break
		else:
			del mas[:int(n / 2)]
	elif count1 == count2:
		del mas[:int(n / 2)]
print(len(mas))


def solve(arr):
	n = len(arr)
	if sorted(arr) == arr:
		return n
	else:
		return max(solve(arr[n // 2:]), solve(arr[:n // 2]))
n = int(input())
arr = [int(x) for x in input().split()]
print(solve(arr))


s = int(input())
num = list(map(int, input().split(' ')))
num1 = list(num)
num2 = list(num)
ans1 = 0
ans2 = 0

def split(l):
	b = list(l[:int(len(l) / 2)])
	c = list(l[int(len(l) / 2):])
	return check(b, c)

def check(l1, l2):
	if sorted(l1) == l1:
		return len(l1)
	elif sorted(l2) == l2:
		return len(l2)
	else:
		return 0
if sorted(num) == num:
	print(s)
else:
	while s != 0 and ans1 == 0 and (ans2 == 0):
		ans1 = split(num1)
		ans2 = split(num2)
		num1 = num1[:int(len(num1) / 2)]
		num2 = num2[int(len(num2) / 2):]
		s = s / 2
	if s == 0:
		print(1)
	elif ans1 >= ans2:
		print(ans1)
	else:
		print(ans2)


def sort_search(lst):
	n = len(lst)
	while n > 1:
		for g in range(len(lst) // n):
			if sorted(lst, g * n, (g + 1) * n):
				return n
		n //= 2
	return 1

def sorted(lst, low, high):
	for i in range(low, high - 1):
		if lst[i + 1] < lst[i]:
			return False
	return True
input()
lst = list(map(int, input().split()))
print(sort_search(lst))


def find_half(arr):
	first_max = 1
	second_max = 1
	temp_max = 1
	for i in range(1, len(arr) // 2):
		if arr[i] >= arr[i - 1]:
			temp_max += 1
		elif temp_max > first_max:
			first_max = temp_max
			temp_max = 1
	if temp_max > first_max:
		first_max = temp_max
	temp_max = 1
	for j in range(len(arr) // 2 + 1, len(arr)):
		if arr[j] >= arr[j - 1]:
			temp_max += 1
		elif temp_max > second_max:
			second_max = temp_max
			temp_max = 1
	if temp_max > second_max:
		second_max = temp_max
	if first_max + second_max == len(arr) and arr[len(arr) // 2 - 1] <= arr[len(arr) // 2]:
		return arr
	elif first_max > second_max:
		return arr[:len(arr) // 2]
	elif second_max > first_max:
		return arr[len(arr) // 2:]
	else:
		return arr[:len(arr) // 2]

def theranos_sort(arr):
	if len(arr) == 0:
		return 1
	half = find_half(arr)
	if len(half) == len(arr):
		return len(half)
	if len(half) == 1:
		return 1
	else:
		return theranos_sort(half)
n = int(input())
arr = list(map(int, input().rstrip().split()))
print(theranos_sort(arr))


def thanos_sort(y):
	for i in range(len(y) - 1):
		if int(y[i]) > int(y[i + 1]):
			if i < int(len(y) / 2):
				del y[:int(len(y) / 2)]
			else:
				del y[int(len(y) / 2):]
			return thanos_sort(y)
	return len(y)
x = input()
y = input().split(' ')
print(thanos_sort(y))


def isSorted(a):
	v = True
	for i in range(1, len(a)):
		x = a[i - 1]
		y = a[i]
		if y < x:
			v = False
	return v

def thanos(a):
	n = len(a)
	if n == 1:
		return 1
	elif isSorted(a):
		return n
	else:
		return max(thanos(a[:n // 2]), thanos(a[n // 2:]))
n = input()
a = input().strip().split()
a = list(map(int, a))
print(thanos(a))


import random

def ii():
	return int(input())

def mi():
	return map(int, input().split())

def li():
	return list(mi())

def main():
	n = ii()
	a = li()
	print(find(a))

def find(a):
	stack = []
	stack.append(a)
	ans = []
	while len(stack) > 0:
		f = True
		curr = stack.pop()
		for i in range(len(curr) - 1):
			if curr[i] > curr[i + 1]:
				f = False
				break
		if f:
			ans.append(len(curr))
		elif len(curr) > 0:
			stack.append(curr[:len(curr) // 2])
			stack.append(curr[len(curr) // 2:])
	return max(ans)
main()


n = int(input())
z = list(map(int, input().split()))

def issortd(x, j):
	if x == sorted(x):
		return j
	else:
		j = j // 2
		x1 = x[j:]
		x = x[:j]
		return issortd(x, j) if issortd(x, j) > issortd(x1, j) else issortd(x1, j)
print(issortd(z, n))


n = int(input())
c = []
a = [int(x) for x in input().split()]
for i in range(1, 17):
	if n / i == n // i:
		counter = 1
		c = []
		for item in a:
			c.append(item)
			if counter % (n // i) == 0:
				if c == sorted(c):
					print(n // i)
					exit()
				c = []
			counter += 1


n = int(input())
a = list(map(int, input().split()))
if a == sorted(a):
	print(n)
else:
	z = n
	ans = 0
	while z != 0:
		cnt = 0
		b = []
		for i in range(0, n):
			if cnt < z:
				b.append(a[i])
			cnt += 1
			if cnt == z:
				cnt = 0
				if b == sorted(b):
					ans = max(ans, z)
				b = []
		z //= 2
	print(ans)


n = int(input())
lst = list(map(int, input().split()))

def sorted(lst):
	l = len(lst)
	for i in range(1, l):
		if lst[i] >= lst[i - 1]:
			continue
		return False
	return True

def cevap(n, lst):
	if sorted(lst):
		return n
	return max(cevap(n // 2, lst[:n // 2]), cevap(n // 2, lst[n // 2:]))
print(cevap(n, lst))


n = int(input())
la = [int(x) for x in input().strip().split()]
iters = [(0, 2), (0, 4), (0, 8), (0, 16), (2, 4), (4, 8), (4, 6), (6, 8), (8, 10), (8, 12), (8, 16), (10, 12), (12, 16), (12, 14), (14, 16)]
mv = 0
for (a, b) in iters:
	if b > n:
		continue
	i = a
	while i < b - 1 and la[i] <= la[i + 1]:
		i += 1
	if i == b - 1:
		mv = max(mv, b - a)
print(max(mv, 1))


a = int(input())
b = list(map(int, input().split()))
result2 = []
result4 = []
result8 = []
z = 0
res = []
if b == sorted(b):
	print(len(b))
else:
	for i in range(0, a + 1, 2):
		result2.append(b[z:i])
		z = i
	for i in range(0, a + 1, 4):
		result4.append(b[z:i])
		z = i
	for i in range(0, a + 1, 8):
		result8.append(b[z:i])
		z = i
	(result2, result4, result8) = (result2[1:], result4[1:], result8[1:])
	if a == 16:
		for i in result8:
			if i == sorted(i):
				res.append(len(i))
		for i in result4:
			if i == sorted(i):
				res.append(len(i))
		for i in result2:
			if i == sorted(i):
				res.append(len(i))
	if a == 8:
		for i in result4:
			if i == sorted(i):
				res.append(len(i))
		for i in result2:
			if i == sorted(i):
				res.append(len(i))
	if a == 4:
		for i in result2:
			if i == sorted(i):
				res.append(len(i))
	try:
		print(max(res))
	except ValueError:
		print(1)


n = int(input())
m = list(map(int, input().split()))

def func(x):
	if sorted(x) == x:
		return len(x)
	elif len(x) == 1:
		return 1
	else:
		return max(func(x[:len(x) // 2]), func(x[len(x) // 2:]))
print(func(m))


def is_sorted(a):
	for i in range(1, len(a)):
		if a[i - 1] > a[i]:
			return False
	return True

def solution(a):
	if is_sorted(a):
		return len(a)
	return max(solution(a[:len(a) // 2]), solution(a[len(a) // 2:]))
n = int(input())
print(solution(tuple(map(int, input().split()))))


n = int(input())
thanos_list = [int(x) for x in input().split()]

def if_sorted(array: list) -> bool:
	return all((array[i] <= array[i + 1] for i in range(len(array) - 1)))

def snap(array):
	if len(array) != 1:
		if if_sorted(array):
			return len(array)
		else:
			return max(snap(array[0:len(array) // 2]), snap(array[len(array) // 2:]))
	return len(array)
print(snap(thanos_list))


def check_if_sorted(array):
	if len(array) >= 2:
		for i in range(len(array) - 1):
			if array[i] > array[i + 1]:
				return False
	return True

def solve(array):
	if check_if_sorted(array):
		return len(array)
	else:
		pivot = len(array) // 2
		if pivot >= 1:
			left = array[:pivot]
			right = array[pivot:]
			return max(solve(left), solve(right))
n = int(input())
a = [int(i) for i in input().split()]
print(solve(a))


n = int(input())
a = list(map(int, input().split()))

def thano_sort(a, n):
	if sorted(a) == a:
		return len(a)
	elif sorted(a[:n // 2]) == a[:n // 2]:
		return thano_sort(a[:n // 2], n // 2)
	else:
		return thano_sort(a[n // 2:], n // 2)
print(thano_sort(a, n))


n = int(input())
a = [int(s) for s in input().split()]
b = [1] * n
for i in range(0, n // 2):
	if a[2 * i] <= a[2 * i + 1]:
		b[2 * i] = 2
for i in range(0, n // 4):
	if b[4 * i] == 2 and b[4 * i + 2] == 2 and (a[4 * i + 1] <= a[4 * i + 2]):
		b[4 * i] = 4
for i in range(0, n // 8):
	if b[8 * i] == 4 and b[8 * i + 4] == 4 and (a[8 * i + 3] <= a[8 * i + 4]):
		b[8 * i] = 8
for i in range(0, n // 16):
	if b[i] == 8 and b[i + 8] == 8 and (a[i + 7] <= a[i + 8]):
		b[i] = 16
print(max(b))


n = int(input())
l = [int(x) for x in input().split()]

def func(low, high):
	if low + 1 < high:
		mid = (low + high) // 2
		if l[low:high] == sorted(l[low:high]):
			return high - low
		return max(func(low, mid), func(mid, high))
	else:
		return 1
print(func(0, n))


import math
from collections import deque, defaultdict
from sys import stdin, stdout
input = stdin.readline
listin = lambda : list(map(int, input().split()))
mapin = lambda : map(int, input().split())
n = int(input())
a = list(map(int, input().split()))
z = []
q = deque([a])
while q:
	first = q.popleft()
	z.append(first)
	if first[:len(first) // 2] not in z:
		q.append(first[:len(first) // 2])
		z.append(first[:len(first) // 2])
	if first[len(first) // 2:] not in z:
		q.append(first[len(first) // 2:])
		z.append(first[len(first) // 2:])
m = 0
for i in z:
	if i == sorted(i):
		m = max(m, len(i))
print(m)


from sys import stdin, stdout
from math import floor, gcd, fabs, factorial, fmod, sqrt, inf, log
from collections import defaultdict as dd, deque
from heapq import merge, heapify, heappop, heappush, nsmallest
from bisect import bisect_left as bl, bisect_right as br, bisect
mod = pow(10, 9) + 7
mod2 = 998244353

def inp():
	return stdin.readline().strip()

def iinp():
	return int(inp())

def out(var, end='\n'):
	stdout.write(str(var) + '\n')

def outa(*var, end='\n'):
	stdout.write(' '.join(map(str, var)) + end)

def lmp():
	return list(mp())

def mp():
	return map(int, inp().split())

def smp():
	return map(str, inp().split())

def l1d(n, val=0):
	return [val for i in range(n)]

def l2d(n, m, val=0):
	return [l1d(m, val) for j in range(n)]

def remadd(x, y):
	return 1 if x % y else 0

def ceil(a, b):
	return (a + b - 1) // b

def isprime(x):
	if x <= 1:
		return False
	if x in (2, 3):
		return True
	if x % 2 == 0:
		return False
	for i in range(3, int(sqrt(x)) + 1, 2):
		if x % i == 0:
			return False
	return True
n = iinp()
arr = lmp()
tn = n
flg = True
while flg:
	for i in range(0, n, tn):
		if arr[i:i + tn] == sorted(arr[i:i + tn]):
			flg = False
			break
	if flg:
		tn //= 2
print(tn)


n = int(input())
arr = list(map(int, input().strip().split()))
k = n
while k >= 1:
	for i in range(0, n + 1, k):
		for j in range(i + k, n + 1, k):
			if arr[i:j] == sorted(arr[i:j]):
				print(len(arr[i:j]))
				exit()
	k //= 2
print(1)


n = int(input())
l = input().split()
for i in range(len(l)):
	l[i] = int(l[i])

def length1(s):
	if s == sorted(s):
		return len(s)
	else:
		return max(length1(s[0:len(s) // 2]), length1(s[len(s) // 2:len(s)]))
print(length1(l))


def solve(a, n):
	s = sorted(a)
	if a == s:
		return n
	return max(solve(a[:n // 2], n // 2), solve(a[n // 2:], n // 2))
n = int(input())
a = list(map(int, input().split()))
print(solve(a, n))


n = int(input())
lis = list(map(int, input().split()))
s = []
r_lis = []
maxi = []

def max_len(l, beg, end, max):
	s = l[beg:end]
	s.sort()
	if s == l[beg:end]:
		maxi.append(len(s))
	s.clear()
	en = int((beg + end) / 2)
	if beg + 1 < end:
		max_len(l, beg, en, maxi)
		max_len(l, en, end, maxi)
max_len(lis, 0, n, maxi)
if len(maxi) != 0:
	print(max(maxi))
else:
	print(1)


from math import log

def isSorted(a, start, end):
	for i in range(start + 1, end):
		if a[i - 1] > a[i]:
			return False
	return True
n = int(input())
l = []
t = input().split()
for i in t:
	l.append(int(i))
longlen = 1
if n >= 2:
	for i in range(0, int(n / 2)):
		if isSorted(l, i * 2, i * 2 + 2):
			longlen = 2
			break
if n >= 4:
	for i in range(0, int(n / 4)):
		if isSorted(l, i * 4, i * 4 + 4):
			longlen = 4
			break
if n >= 8:
	for i in range(0, int(n / 8)):
		if isSorted(l, i * 8, i * 8 + 8):
			longlen = 8
			break
if n >= 16:
	for i in range(0, int(n / 16)):
		if isSorted(l, i * 16, i * 16 + 16):
			longlen = 16
			break
print(longlen)


_ = int(input())
A = list(map(int, input().split()))

def f(A):
	n = len(A)
	if A == sorted(A):
		return len(A)
	else:
		return max(f(A[:n // 2]), f(A[n // 2:]))
print(f(A))


n = int(input())
A = list(map(int, input().split()))
t = 1
while n > 1 and t == 1:
	for i in range(0, len(A), n):
		for j in range(1, n):
			if A[i + j] < A[i + j - 1]:
				break
			if j == n - 1:
				t = n
		if t != 1:
			break
	n //= 2
print(t)


def sor(l, S):
	flag = 1
	for i in range(l - 1):
		if S[i + 1] < S[i]:
			flag = 0
	return flag
n = int(input())
M = list(map(int, input().split()))
if n == 1:
	a = 0
elif n == 2:
	a = 1
elif n == 4:
	a = 2
elif n == 8:
	a = 3
else:
	a = 4
m = 0
for i in range(a + 1):
	for j in range(n // 2 ** i):
		K = [0] * 2 ** i
		for k in range(2 ** i):
			K[k] = M[j * 2 ** i + k]
		if sor(2 ** i, K) == 1:
			m = max(m, 2 ** i)
print(m)


n = int(input())
a = input()
a = a.split()
ans = 0
i = 0
while 1 << i <= n:
	for j in range(int(n / (1 << i))):
		flag = 1
		for k in range(1 << i):
			index = j * (1 << i) + k
			if k == 0 or int(a[index]) >= int(a[index - 1]):
				continue
			else:
				flag = 0
				break
		if flag == 1 and ans < i:
			ans = i
	i += 1
print(1 << ans)


def thanos_good(a, l, r):
	for i in range(l + 1, r + 1):
		if a[i] < a[i - 1]:
			return False
	return True

def thanos_sort(a, l, r):
	if thanos_good(a, l, r):
		return r - l + 1
	m = (l + r) // 2
	return max(thanos_sort(a, l, m), thanos_sort(a, m + 1, r))
n = int(input())
a = list(map(int, input().split()))
print(thanos_sort(a, 0, n - 1))


input()

def solve(b):
	if sorted(b) == b:
		return len(b)
	return max(solve(b[len(b) // 2:]), solve(b[:len(b) // 2]))
print(solve(list(map(int, input().split()))))


import math
n = int(input())
lista = list(input().split(' '))
lista = list((int(x) for x in lista))
for i in range(int(math.log2(n))):
	for j in range(int(len(lista) / int(n / 2 ** i))):
		if lista[j * int(n / 2 ** i):(j + 1) * int(n / 2 ** i)] == sorted(lista[j * int(n / 2 ** i):(j + 1) * int(n / 2 ** i)]):
			print(int(n / 2 ** i))
			exit()
print(1)


ans = set()

def rec(lst, n):
	if len(lst) == 1:
		ans.add(1)
	else:
		l = lst[:]
		l.sort()
		n = n // 2
		if l == lst:
			ans.add(len(lst))
		rec(lst[0:n], n)
		rec(lst[n:], n)
n = int(input())
lst = list(map(int, input().split()))
rec(lst, n)
print(max(ans))


n = int(input())
l = list(map(int, input().split(' ')))
l = [l]
i = 1
j = 0
temp = 0
while i == 1:
	if l[j] == sorted(l[j]):
		if temp < len(l[j]):
			temp = len(l[j])
		j += 1
	else:
		li = l[j][int(len(l[j]) / 2):]
		lj = l[j][:int(len(l[j]) / 2)]
		l.append(li)
		l[j] = lj
		j = 0
	if j == len(l):
		i = 0
print(temp)


n = int(input())
a = [int(i) for i in input().split(' ')]
res = []

def ts(arr):
	if arr == sorted(arr):
		res.append(len(arr))
	elif len(arr) > 1:
		mid = len(arr) // 2
		l = arr[:mid]
		r = arr[mid:]
		if l == sorted(l):
			res.append(len(l))
		elif r == sorted(r):
			res.append(len(r))
		ts(l)
		ts(r)
ts(a)
print(max(res))


def main():
	n = m = int(input())
	l = list(map(int, input().split()))
	while m:
		if any((all((l[i] <= l[i + 1] for i in range(j, j + m - 1))) for j in range(0, n, m))):
			return print(m)
		m //= 2
main()


def rightCheck(l: list) -> int:
	if l == sorted(l):
		return len(l)
	else:
		new_l = l[len(l) // 2:]
		if len(new_l) > 1:
			if leftCheck(new_l) >= rightCheck(new_l):
				return leftCheck(new_l)
			else:
				return rightCheck(new_l)
		else:
			return 1

def leftCheck(l: list) -> int:
	if l == sorted(l):
		return len(l)
	else:
		new_l = l[:len(l) // 2]
		if len(new_l) > 1:
			if leftCheck(new_l) >= rightCheck(new_l):
				return leftCheck(new_l)
			else:
				return rightCheck(new_l)
		else:
			return 1

def main():
	n = int(input())
	l = list(map(int, input().split()))
	left_p = leftCheck(l)
	right_p = rightCheck(l)
	if left_p >= right_p:
		return left_p
	else:
		return right_p
print(main())


int(input())
main_list = [int(_) for _ in input().split()]
copy = main_list
while main_list != sorted(main_list) and len(main_list) != 1:
	(part1, part2) = (main_list[:len(main_list) // 2], main_list[len(main_list) // 2:])
	if part1 == sorted(part1):
		main_list = part1
	elif part2 == sorted(part2):
		main_list = part2
	else:
		main_list = part1
while copy != sorted(copy) and len(copy) != 1:
	(part1, part2) = (copy[:len(copy) // 2], copy[len(copy) // 2:])
	if part1 == sorted(part1):
		copy = part1
	elif part2 == sorted(part2):
		copy = part2
	else:
		copy = part2
if len(main_list) > len(copy):
	print(len(main_list))
else:
	print(len(copy))


n = int(input())
a = list(map(int, input().split(' ')))
ans = 1
length = 2
while length <= n:
	for i in range(0, n // length):
		b = a[i * length:(i + 1) * length]
		ok = True
		for j in range(len(b) - 1):
			if b[j] > b[j + 1]:
				ok = False
				break
		if ok:
			ans = length
			break
	length *= 2
print(ans)


def divide(arr, l, u):
	global count
	if l < u:
		mid = (l + u) // 2
		if arr[l:u + 1] == sorted(arr[l:u + 1]):
			if count < u - l + 1:
				count = u - l + 1
		divide(arr, l, mid)
		divide(arr, mid + 1, u)
	elif l == u and count == 0:
		count = 1
count = 0
_ = int(input())
l = list(map(int, input().split()))
divide(l, 0, _ - 1)
print(count)


n = int(input())
l = list(map(int, input().split()))
ans = [1]
if n == 1:
	print(1)
	exit()
if n == 2 and l == sorted(l):
	print(2)
	exit()
if n == 2 and l != sorted(l):
	print(1)
	exit()
if n == 4:
	for i in range(0, n, 2):
		if l[i:i + 2] == sorted(l[i:i + 2]):
			ans.append(2)
	if l == sorted(l):
		ans.append(4)
	print(max(ans))
	exit()
if n == 8:
	for i in range(0, n, 2):
		if l[i:i + 2] == sorted(l[i:i + 2]):
			ans.append(2)
	for i in range(0, n, 4):
		if l[i:i + 4] == sorted(l[i:i + 4]):
			ans.append(4)
	if l == sorted(l):
		ans.append(8)
	print(max(ans))
	exit()
if n == 16:
	for i in range(0, n, 2):
		if l[i:i + 2] == sorted(l[i:i + 2]):
			ans.append(2)
	for i in range(0, n, 4):
		if l[i:i + 4] == sorted(l[i:i + 4]):
			ans.append(4)
	for i in range(0, n, 8):
		if l[i:i + 8] == sorted(l[i:i + 8]):
			ans.append(8)
	if l == sorted(l):
		ans.append(16)
	print(max(ans))
	exit()


n = int(input())
l = list(map(int, input().split()))

def iss(l):
	ll = sorted(l)
	if ll == l:
		return len(l)
	else:
		return -1
q = [l]
l1 = l
a = 1
while len(l1) != 1:
	l = q.pop(0)
	q.append(l[:len(l) // 2])
	q.append(l[len(l) // 2:])
	a = iss(l)
	if a != -1:
		break
print(a)


def thanos(arr):
	if is_sorted(arr):
		return len(arr)
	else:
		l1 = thanos(arr[:len(arr) // 2])
		l2 = thanos(arr[len(arr) // 2:])
		return max(l1, l2)

def is_sorted(arr):
	for i in range(1, len(arr)):
		if arr[i - 1] > arr[i]:
			return False
	return True
n = int(input())
arr = [int(n) for n in input().split()]
print(thanos(arr))


N = int(input())
Ns = [None] + input().split()
Ms = [0] * 20
Ms[1] = 1
for wi in range(2, N + 1):
	if int(Ns[wi]) >= int(Ns[wi - 1]):
		Ms[wi] = Ms[wi - 1] + 1
	else:
		Ms[wi] = 1
Maxi = 1
for wi in range(1, N + 1):
	len = wi & -wi
	while len > 1 and len > Ms[wi]:
		len = len // 2
	Maxi = max(Maxi, len)
print(Maxi)


n = int(input())
array = [int(x) for x in input().split()]

def isSorted(lista):
	return lista == sorted(lista)

def ThanosSort(lista):
	n = len(lista)
	if isSorted(lista):
		return lista
	elif isSorted(lista[0:int(n / 2)]):
		return lista[0:int(n / 2)]
	elif isSorted(lista[int(n / 2):n]):
		return lista[int(n / 2):n]
	else:
		h1 = ThanosSort(lista[0:int(n / 2)])
		h2 = ThanosSort(lista[int(n / 2):n])
		if len(h1) >= len(h2):
			return h1
		else:
			return h2
array = ThanosSort(array)
print(len(array))


def lcheck(A):
	if A == sorted(A):
		return len(A)
	else:
		new_A = A[:len(A) // 2]
		if len(new_A) > 1:
			if lcheck(new_A) >= rcheck(new_A):
				return lcheck(new_A)
			else:
				return rcheck(new_A)
		else:
			return 1

def rcheck(A):
	if A == sorted(A):
		return len(A)
	else:
		new_A = A[len(A) // 2:]
		if len(new_A) > 1:
			if rcheck(new_A) >= lcheck(new_A):
				return rcheck(new_A)
			else:
				return lcheck(new_A)
		else:
			return 1
n = int(input())
A = list(map(int, input().split()))
if lcheck(A) >= rcheck(A):
	print(lcheck(A))
else:
	print(rcheck(A))


import math
how_much = math.log(int(input()), 2)
lst = [[int(i) for i in input().split()]]
for _ in range(int(how_much) + 1):
	(new_lst, f) = ([], 0)
	for i in lst:
		if i == sorted(i):
			print(len(i))
			f = 1
			break
		else:
			new_lst.append(i[0:len(i) // 2])
			new_lst.append(i[len(i) // 2:])
	if f:
		break
	lst = new_lst


class ThanosSort:

	def __init__(self, arr):
		self._arr = arr
		self._length = len(arr)

	def issorted(self, i=None, j=None):
		if i == None:
			i = 0
		if j == None:
			j = self._length - 1
		length = j - i
		for c in range(i + 1, j + 1):
			if self._arr[c] < self._arr[c - 1]:
				return False
		return True

	def checksortable(self, i=None, j=None):
		if i == None:
			i = 0
		if j == None:
			j = self._length - 1
		if i == 0 and j == self._length - 1:
			if self.issorted(i, j):
				return int(j - i + 1)
		if self.issorted(i, int((i + j) / 2)) or self.issorted(int((i + j) / 2) + 1, j):
			return int((j - i) / 2) + 1
		return int(max(self.checksortable(i, int((j + i) / 2)), self.checksortable(int((j + i) / 2) + 1, j)))

def main():
	length = input()
	arr = list(map(int, input().split()))
	thanos = ThanosSort(arr)
	print(thanos.checksortable())
main()


from sys import stdin, stdout
l = list()
m = list()
length = int(stdin.readline().rstrip())
for x in stdin.readline().rstrip().split():
	l.append(int(x))

def sorted(li, length):
	i = 0
	l = length
	mid = int(l / 2)
	m = 0
	while i < l:
		if li[i] < m:
			return max(sorted(li[0:mid], mid), sorted(li[mid:l], mid))
		m = li[i]
		i += 1
	return l
stdout.write(str(sorted(l, length)) + '\n')


def check(l):
	if l == sorted(l):
		return len(l)
	else:
		return max(check(l[:len(l) // 2]), check(l[len(l) // 2:len(l)]))
n = int(input())
l = list(map(int, input().split()))
print(check(l), end='')


def thanos(a, l, d):
	if sorted(a[l:d]) == a[l:d]:
		return d - l
	return max(thanos(a, l, (l + d) // 2), thanos(a, (l + d) // 2, d))
(n, data) = (int(input().strip()), [int(x) for x in input().strip().split()])
print(thanos(data, 0, n))


n = input()
n = int(n)
test = list(map(int, input().split()))
ind = [0] * (n - 1)
for i in range(1, n):
	if test[i] - test[i - 1] >= 0:
		ind[i - 1] = 1
	else:
		ind[i - 1] = -1
n_of_int = 1
found = 0
max_len = 1
while n > 1:
	for j in range(n_of_int):
		if -1 in ind[j * n:(j + 1) * n - 1]:
			if j == n_of_int - 1:
				n //= 2
				n_of_int *= 2
			else:
				continue
		else:
			found = 1
			max_len = n
	if found:
		break
print(max_len)


def thanos(a):
	if sorted(a) == a:
		return len(a)
	l = len(a) // 2
	return max(thanos(a[:l]), thanos(a[l:]))
n = input().strip().split()
a = list(map(int, input().strip().split()))
print(thanos(a))


debug = False
if debug:
	f = None

	def new_input():
		global f
		if f == None:
			f = open('input.txt')
		return f.readline()
	input = new_input

def is_sorted(arr, lo, hi):
	for k in range(lo, hi - 1):
		if arr[k] > arr[k + 1]:
			return False
	return True

def thanos_sort(arr, lo, hi):
	if hi - lo == 1:
		return 1
	mid = (hi + lo) // 2
	if is_sorted(arr, lo, hi):
		return hi - lo
	else:
		return max(thanos_sort(arr, lo, mid), thanos_sort(arr, mid, hi))
n = int(input())
arr = list(map(int, input().split()))
print(thanos_sort(arr, 0, n))


def sort(l):
	mid = len(l) // 2
	if sorted(l) == l:
		return len(l)
	else:
		return max(sort(l[:mid]), sort(l[mid:]))
n = int(input())
l = list(map(int, input().split()))
print(sort(l))


n = int(input())
t = list(map(int, input().split(' ')))

def sol(t):
	s = sorted(t)
	if all([t[i] == s[i] for i in range(len(t))]):
		return len(t)
	return max(sol(t[:int(len(t) / 2)]), sol(t[int(len(t) / 2):]))
print(sol(t))


def sort(items, cl):
	if items == []:
		return cl
	if sorted(items) != items:
		sort(items[:len(items) // 2], cl)
		sort(items[len(items) // 2:], cl)
	else:
		cl.append(len(items))
n = int(input())
l = [int(a) for a in input().split(' ')]
cl = []
if sorted(l) == l:
	print(len(l))
elif sorted(l)[::-1] == l:
	print('1')
else:
	sort(l, cl)
	print(max(cl))


n = int(input())
data = list(map(int, input().split()))

def thanos_sort(nums, n):
	if nums == sorted(nums):
		return n
	n = n // 2
	return max(thanos_sort(nums[:n], n), thanos_sort(nums[n:], n))
print(thanos_sort(data, n))


numberOfTestCases = 1

def checkSort(arr):
	if len(arr) <= 1:
		return True
	for i in range(len(arr) - 1):
		if arr[i] > arr[i + 1]:
			return False
	return True

def thanos(arr):
	N = len(arr)
	if checkSort(arr):
		return N
	else:
		half = int(N / 2)
		return max(thanos(arr[:half]), thanos(arr[half:]))
for test in range(numberOfTestCases):
	N = int(input())
	arr = [int(i) for i in input().split(' ')]
	print(thanos(arr))
	pass


b = []

def thanos(a, n):
	if sorted(a) == a:
		b.append(len(a))
	else:
		l = a[:int(n / 2)]
		r = a[int(n / 2):]
		thanos(l, n / 2)
		thanos(r, n / 2)
n = int(input())
a = [int(x) for x in input().split()]
thanos(a, n)
print(max(b))


n = int(input())
i = n
line = list(map(int, input().split()))
flag = 0
k = 1
maxsor = 1
while k < n:
	maxsor = 1
	for j in range(k):
		sor = 1
		for m in range(1, i):
			if line[i * j + m - 1] <= line[i * j + m]:
				sor = sor + 1
		if maxsor < sor:
			maxsor = sor
	if maxsor == i:
		break
	else:
		k = k * 2
		i = i // 2
print(i)


def thanos_sort(xs):
	if all((x <= y for (x, y) in zip(xs[:-1], xs[1:]))):
		return len(xs)
	else:
		return max(thanos_sort(xs[:len(xs) // 2]), thanos_sort(xs[len(xs) // 2:]))
n = int(input())
xs = list(map(int, input().split(' ')))
print(thanos_sort(xs))


nos = int(input())
n_arry = [int(i) for i in input().split()][:nos]
p = 1
pts = [0]
xyz = [0, 1, 2, 4, 8, 16]
abc = [0, 2, 4, 6, 8, 10, 12, 14, 16, 18]
ans = [1]
qqq = [16, 8, 4, 2, 1]
if nos > 1:
	for a in range(nos - 1):
		if n_arry[a + 1] >= n_arry[a]:
			p += 1
		else:
			pts.append(p)
			p = 1
			pts.append(a + 1)
	pts.append(p)
	pts.append(a + 2)
	for x in range(int(len(pts) / 2)):
		for i in range(len(abc)):
			if abc[i] >= pts[2 * x]:
				aa = abc[i]
				break
		for i in range(len(abc)):
			if abc[i] > pts[2 * x + 2]:
				bb = abc[i - 1]
				break
		for k in qqq:
			for i in range(int(16 / k) + 1):
				if k * i >= aa and k * (i + 1) <= bb:
					ans.append(k)
					break
	print(max(ans))
else:
	print(1)


def snap(x):
	arrSort = x[:]
	arrSort.sort()
	if x == arrSort:
		return len(x)
	else:
		return max(snap(x[:len(x) // 2]), snap(x[len(x) // 2:]))
n = int(input())
aStr = input().split()
arr = [int(y) for y in aStr]
print(snap(arr))


n = int(input())
a = [int(a) for a in input().split()]

def snap(a):
	if a == sorted(a):
		return len(a)
	l = len(a) // 2
	return max(snap(a[:l]), snap(a[l:]))
print(snap(a))


def fun1(arr, n):
	if n == 1:
		return [1]
	nmid = n // 2
	arr0 = arr[:nmid]
	arr1 = arr[nmid:]
	if n == 2:
		if arr0[0] <= arr1[0]:
			return (True, arr0[0], arr1[0], 2)
		else:
			return (False, arr0[0], arr1[0], 1)
	(is_sorted0, amin0, amax0, narr0) = fun1(arr0, nmid)
	(is_sorted1, amin1, amax1, narr1) = fun1(arr1, nmid)
	if is_sorted0 and is_sorted1:
		if amax0 <= amin1:
			return (True, amin0, amax1, narr0 + narr1)
		else:
			return (False, None, None, max(narr0, narr1))
	else:
		return (False, None, None, max(narr0, narr1))

def sol():
	n = int(input())
	arr = [int(x) for x in input().split()]
	solution = fun1(arr, n)
	return solution[-1]
print(sol())


import math
n = int(input())
a = list(map(int, input().split(' ')))
l = []
for m in range(0, int(math.log(n) / math.log(2)) + 1):
	i = 0
	j = 2 ** m
	while j <= n:
		t = a[i:j]
		k = list(t)
		k.sort()
		if k == t:
			l.append(len(t))
		i = j
		j = i + 2 ** m
print(max(l))


n = int(input())
isAR = list(map(int, input().split()))
(arl, arR) = ([], [])
mas = []

def raspr(arr, arr1, arr2):
	if len(arr) < 2:
		mas.append(1)
	else:
		for i in range(int(len(arr) / 2)):
			arr1.append(arr[i])
		if arr1 == sorted(arr1):
			mas.append(len(arr1))
		else:
			raspr(arr1, [], [])
		for i in range(int(len(arr) / 2), len(arr)):
			arr2.append(arr[i])
		if arr2 == sorted(arr2):
			mas.append(len(arr2))
		else:
			raspr(arr2, [], [])
if isAR == sorted(isAR):
	print(len(isAR))
else:
	raspr(isAR, [], [])
	print(max(mas))


import math
n = int(input())
num = [int(x) for x in input().split(' ')]
b = True
count = 1
pivt = n
maximum = 1
if len(num) != 1:
	while b:
		maximum = 1
		for i in range(1, n):
			if (i + 1) % pivt == 1:
				continue
			if num[i] >= num[i - 1]:
				count = count + 1
			else:
				count = 1
			if (i + 1) % pivt == 0:
				maximum = max(maximum, count)
				count = 1
				if maximum == pivt:
					b = False
					break
		pivt = math.ceil(pivt / 2)
print(maximum)


def rec(l, r):
	if l == r:
		return 1
	t = 1
	for i in range(l, r):
		if a[i] > a[i + 1]:
			t = 0
	if t == 1:
		return r - l + 1
	else:
		m1 = rec(l, (l + r) // 2)
		m2 = rec((l + r) // 2 + 1, r)
		return max(m1, m2)
n = int(input())
a = [int(i) for i in input().split()]
print(rec(0, n - 1))


import sys

def is_sorted(arr):
	for i in range(len(arr) - 1):
		if arr[i] > arr[i + 1]:
			return False
	return True

def tanos_sort(arr):
	if is_sorted(arr):
		return len(arr)
	else:
		ans_l = tanos_sort(arr[:len(arr) // 2])
		ans_r = tanos_sort(arr[len(arr) // 2:])
		if ans_l > ans_r:
			return ans_l
		else:
			return ans_r
n = int(input())
arr = []
str_arr = input()
for elem in str_arr.split(' '):
	arr.append(int(elem))
print(tanos_sort(arr))


def sorter(num, array):
	if sorted(array) == array:
		return num
	else:
		x = sorter(num / 2, array[:int(num / 2)])
		y = sorter(num / 2, array[int(num / 2):])
		if x > y:
			return x
		else:
			return y
import sys
lines = sys.stdin.readlines()
num = int(lines[0])
array = [int(x) for x in lines[1].split()]
z = int(sorter(num, array))
sys.stdout.write(str(z))


def thanos_sort(arr):
	n = len(arr)
	if n == 1:
		return 1
	if sorted(arr) == arr:
		return n
	left_part = arr[:int(n / 2)]
	right_part = arr[int(n / 2):]
	return max(thanos_sort(left_part), thanos_sort(right_part))
n = int(input())
arr = list(map(int, input().split()))
out = thanos_sort(arr)
print(out)


n = int(input())
numbers = list(map(int, input().rstrip().split()))
import queue, math

def ThanosSort(numbers) -> int:
	que = queue.Queue()
	que.put(numbers)
	while not que.empty():
		nums = que.get()
		if nums == sorted(nums):
			return len(nums)
		half = math.floor(len(nums) / 2)
		que.put(nums[:half])
		que.put(nums[half:])
	return 0
print(ThanosSort(numbers))


def snap(a):
	if a == sorted(a) or len(a) == 1:
		return len(a)
	half = int(len(a) / 2)
	if len(a) % 2 == 0:
		return max(snap(a[:half]), snap(a[half:]))
	else:
		return max(max(snap(a[:half]), snap(a[half:])), max(snap(a[:half + 1]), snap(a[half + 1:])))
n = int(input())
a = [int(i) for i in input().split()]
assert len(a) == n
print(snap(a))


import sys

def thanos(li, len_li):
	if li[:] == sorted(li):
		return len_li
	return max(thanos(li[:len_li // 2], len_li // 2), thanos(li[len_li // 2:], len_li // 2))
n = int(sys.stdin.readline())
s = list(map(int, sys.stdin.readline().split()))
print(thanos(s, n))


def func(arr):
	if arr == sorted(arr, key=int):
		return len(arr)
	return max(func(arr[:len(arr) // 2]), func(arr[len(arr) // 2:]))
a = int(input())
arr = list(map(int, input().split()))
print(func(arr))


n = int(input())
z = [int(i) for i in input().split()]
m = [1, 2, 1, 4, 1, 2, 1, 8, 1, 2, 1, 4, 1, 2, 1, 16]
o = 1
d = 1
for i in range(1, n):
	if z[i] < z[i - 1]:
		d = 1
	else:
		d += 1
		t = m[i]
		while d < t:
			t //= 2
		o = max(o, t)
print(o)


a = int(input())
b = [int(str(i)) for i in input().split(' ')]
i = 0
sort = []
z = True
comp = 0
uf = 0
uf2 = []

def is_sort(arr):
	if len(arr) == 1:
		return True
	for i in range(len(arr) - 1):
		if arr[i] <= arr[i + 1]:
			fl = True
		else:
			return False
	return fl

def thanos(arr):
	z = is_sort(arr)
	if z is False:
		le = len(b) / 2
		q = is_sort(b[0:int(le)])
		if q is True:
			uf2.append(le)
		del b[0:int(le)]
	if z is True:
		uf = len(b)
		if len(uf2) > 0:
			if max(uf2) > uf:
				uf = max(uf2)
		print(int(uf))
		exit()
	else:
		thanos(b)
thanos(b)


length = [1]

def rec(Arr, i, j):
	if i >= j:
		return
	temp_Arr = Arr[i:j + 1]
	temp_Arr.sort()
	if temp_Arr == Arr[i:j + 1]:
		length.append(j - i + 1)
	else:
		rec(Arr, i + (j - i + 1) // 2, j)
		rec(Arr, i, j - (j - i + 1) // 2)
n = int(input())
Arr = list(map(int, input().split()))
rec(Arr, 0, n - 1)
print(max(length))


def issorted(l):
	return l == sorted(l)

def canbeachieved(l, n):
	m = len(l)
	r = m // n
	for i in range(r):
		if issorted(l[i * n:(i + 1) * n]):
			return True
	return False

def f(l):
	k = len(l)
	while True:
		if canbeachieved(l, k):
			return k
		k = k // 2
n = input()
print(f([int(x) for x in input().split()]))


def check(arr, n):
	arr2 = arr[:]
	arr2.sort()
	if arr == arr2:
		return n
	else:
		f1 = check(arr[0:n // 2], n // 2)
		f2 = check(arr[n // 2:n], n // 2)
	return max(f1, f2)
n = int(input())
arr = list(map(int, input().strip().split()))[:n]
print(str(check(arr, n)))


def fun1(l, n):
	t = 0
	for i in range(n - 1):
		if l[i] > l[i + 1]:
			t = 1
			break
	if t != 0:
		a1 = l[0:int(n / 2)]
		a2 = l[int(n / 2):n]
		s1 = fun1(a1, int(n / 2))
		s2 = fun1(a2, int(n / 2))
		if s1 > s2:
			return s1
		return s2
	return n
n = int(input())
l = [int(x) for x in input().split()]
print(fun1(l, n))


import sys

def findMax(arr):
	if len(arr) == 1:
		return 1
	elif len(arr) == 2:
		if arr[0] > arr[1]:
			return 1
		else:
			return 2
	if sorted(arr) == arr:
		return len(arr)
	else:
		firstHalf = arr[:len(arr) // 2]
		secondHalf = arr[len(arr) // 2:]
		return max(findMax(firstHalf), findMax(secondHalf))
n = int(sys.stdin.readline())
arr = list(map(int, sys.stdin.readline().split()))
print(findMax(arr))


n = int(input())
l = list(map(int, input().split()))

def f(a):
	n = len(a)
	if len(a) == 1:
		return 1
	if len(a) == 0:
		return 0
	if a == sorted(a):
		return len(a)
	else:
		return max(f(a[:n // 2]), f(a[n // 2:]))
print(f(l))


def is_sorted(a):
	return all([a[i] >= a[i - 1] for i in range(1, len(a))])
n = int(input())
a = list(map(int, input().split()))
while n > 1:
	if any([is_sorted(a[k:k + n]) for k in range(0, len(a), n)]):
		print(n)
		break
	n //= 2
else:
	print(1)


n = m = int(input())
A = [int(x) for x in input().split()]
while True:
	if any((sorted(A[i:i + m]) == A[i:i + m] for i in range(0, n, m))):
		print(m)
		break
	m //= 2


length = int(input())
array = [int(x) for x in input().split(' ')]

def check(array):
	l = len(array)
	for i in range(1, l):
		if array[i - 1] > array[i]:
			return False
	return True
parts = 1
while True:
	for i in range(parts):
		temp = array[i * length // parts:(i + 1) * length // parts]
		if check(temp) == True:
			print(length // parts)
			exit()
	parts *= 2
	if length // parts == 1:
		print(1)
		exit()


def functionfab(arr):
	len_arr = len(arr)
	count = 0
	if len_arr == 1:
		return 1
	for i in range(1, len_arr):
		if arr[i] >= arr[i - 1]:
			count += 1
		else:
			break
	if count + 1 == len(arr):
		return count + 1
	temp = max(functionfab(arr[:len_arr // 2]), functionfab(arr[len_arr // 2:]))
	return temp
input()
arr = list(map(int, input().split()))
print(functionfab(arr))


def solve(l: list, n):
	size = n
	while size > 0:
		c = 1
		half = 0
		second = 0
		i = 0
		while i < size - 1:
			if l[i] <= l[i + 1]:
				c += 1
			if i == size // 2 - 1:
				i += 1
				continue
			if l[i] <= l[i + 1]:
				if i < size // 2:
					half += 1
				else:
					second += 1
			i += 1
		if c == size:
			return c
		if half == second or half > second:
			l = l[0:size // 2]
		else:
			l = l[size // 2:]
		size = len(l)
n = int(input())
el = [int(s) for s in input().split()]
print(solve(el, n))


def solve(arr, lb, ub):
	if lb == ub:
		return 1
	flag = True
	for i in range(lb, ub):
		if arr[i + 1] < arr[i]:
			flag = False
			break
	if flag:
		return ub - lb + 1
	else:
		mid = (ub + lb) // 2
		return max(solve(arr, lb, mid), solve(arr, mid + 1, ub))
n = int(input())
arr = [int(s) for s in input().split()]
print(solve(arr, 0, len(arr) - 1))


n = int(input())
lst = list(map(int, input().split()))
ck = 1
while n != 1:
	ck = 0
	j = 0
	while j <= len(lst) - n:
		ck = 0
		for i in range(j, j + n - 1):
			if lst[i] > lst[i + 1]:
				ck = 1
		if ck == 0:
			break
		j += n
	if ck == 0:
		print(n)
		break
	n //= 2
if n == 1:
	print(1)


count = int(input())
array = input()
array = array.split()
array = [int(i) for i in array]

def recursivesnap(cnt, arr):
	if cnt == 1:
		return 1
	for a in range(cnt - 1):
		if arr[a] > arr[a + 1]:
			half = int(cnt // 2)
			left = recursivesnap(half, arr[:half])
			right = recursivesnap(half, arr[half:])
			if left > right:
				return left
			else:
				return right
	return cnt
print(recursivesnap(count, array))


def find(a):
	if a == sorted(a):
		return len(a)
	else:
		mid = len(a) // 2
		b = a[:mid]
		c = a[mid:]
		bb = find(b)
		cc = find(c)
		return max(bb, cc)
t = int(input())
a = list(map(int, input().split()))
g = find(a)
print(g)


def go(a, n):
	if a == sorted(a):
		return n
	n //= 2
	return max(go(a[:n], n), go(a[n:], n))
n = int(input())
print(go(list(map(int, input().split())), n))


N = int(input())
A = list(map(int, input().split()))
DP = [0] * (N * 2 - 1)
C = 1
while 1:
	for i in range(C):
		X = A[i * N:(i + 1) * N]
		if sorted(X) == X:
			print(N)
			exit()
	C *= 2
	N >>= 1


def snap(a):
	arrSort = a[:]
	arrSort.sort()
	count = 0
	if a == arrSort:
		return len(a)
	else:
		return max(snap(a[:len(a) // 2]), snap(a[len(a) // 2:]))
n = int(input())
aStr = input().split()
arr = [int(x) for x in aStr]
print(snap(arr))


def string2list(x):
	x = x.split()
	i = 0
	for i in range(len(x)):
		x[i] = int(x[i])
	return x

def is_sorted(x):
	y = True
	i = 0
	while i < len(x) - 1:
		y = y and x[i] <= x[i + 1]
		i = i + 1
	return y

def L_snap(x):
	i = 0
	while i < len(x) / 2:
		x.pop(0)
		i = i + 1
	return x

def R_snap(x):
	i = 0
	N = len(x) / 2
	while i < N:
		x.pop(-1)
		i = i + 1
	return x

def maximal(x):
	if is_sorted(x) or len(x) == 1:
		return len(x)
	else:
		xL = L_snap(x.copy())
		xR = R_snap(x.copy())
		yL = maximal(xL)
		yR = maximal(xR)
		return max(yL, yR)

def L_snap(x):
	i = 0
	N = len(x) / 2
	while i < N:
		x.pop(0)
		i = i + 1
	return x
N = input()
x = input()
x = string2list(x)
print(maximal(x))


kk = lambda : map(int, input().split())
ll = lambda : list(kk())

def dp(ls):
	if sorted(ls) == ls:
		return len(ls)
	return max(dp(ls[:len(ls) // 2]), dp(ls[len(ls) // 2:]))
_ = (input(), print(dp(ll())))


def isSorted(arr, start, end):
	if start == end:
		return True
	for i in range(start, end):
		if arr[i + 1] < arr[i]:
			return False
	return True

def TS(arr, start, end):
	if isSorted(arr, start, end):
		return end - start + 1
	mid = (start + end) // 2
	p1 = TS(arr, start, mid)
	p2 = TS(arr, mid + 1, end)
	return max(p1, p2)
N = int(input())
arr = list(map(int, input().split()))
print(TS(arr, 0, N - 1))


def thanos_sort(array):
	for i in range(len(array) - 1):
		if array[i] > array[i + 1]:
			if i < len(array) // 2:
				del array[:len(array) // 2]
			else:
				del array[len(array) // 2:]
			return thanos_sort(array)
	return len(array)
n = input()
array = list(map(int, input().split()))
print(thanos_sort(array))


import copy
n = int(input())
a = list(map(int, input().split()))

def thanoSort(l, start, end):
	if start > end:
		return 0
	if start == end:
		return 1
	else:
		mid = start + (end - start) // 2
		left = thanoSort(l, start, mid)
		right = thanoSort(l, mid + 1, end)
		if left == mid - start + 1 and (right == end - (mid + 1) + 1 and l[mid] <= l[mid + 1]):
			return end - start + 1
		return max(left, right)
print(thanoSort(a, 0, n - 1))


import sys

def checkSorted(arr):
	for i in range(len(arr) - 1):
		if arr[i] > arr[i + 1]:
			return False
	return True

def ThanosSort(n, arr):
	if checkSorted(arr):
		return n
	half = n // 2
	return max(ThanosSort(half, arr[:half]), ThanosSort(half, arr[half:]))
n = int(input())
arr = list(map(int, input().split()))
print(ThanosSort(n, arr))


n = int(input())
a = list(map(int, input().split()))
b = a.copy()
b.sort()
T = True
if a == b:
	print(n)
else:
	x = [16, 8, 4, 2, 1]
	y = 'no'
	c = x[x.index(n):]
	for i in c:
		for j in range(0, n, i):
			y = a[j:j + i].copy()
			y.sort()
			if y == a[j:j + i]:
				print(i)
				y = 'yes'
				break
		if y == 'yes':
			break


n = int(input())
array = [int(i) for i in input().split()]
arrays = []

def thanosSort(array):
	if array == sorted(array):
		arrays.append(array)
		return
	primeiraMetade = array[0:len(array) // 2]
	segundaMetade = array[len(array) // 2:len(array)]
	thanosSort(primeiraMetade)
	thanosSort(segundaMetade)
thanosSort(array)
maiorArray = []
for e in arrays:
	if len(maiorArray) < len(e):
		maiorArray = e
print(len(maiorArray))


n = int(input())
qw = [int(i) for i in input().split()]
c = 0

def q(l, r):
	global c
	boo = 0
	for i in range(l, r):
		if qw[i] > qw[i + 1]:
			boo = 1
			break
	if boo == 0:
		c = max(c, r - l + 1)
	mid = (l + r) // 2
	if l - r != 0:
		q(l, mid)
		q(mid + 1, r)
	return
q(0, n - 1)
print(c)


def snap(a, lo, hi):
	mid = (lo + hi) // 2
	if is_sorted(a, lo, hi):
		return hi - lo
	else:
		return max(snap(a, lo, mid), snap(a, mid, hi))

def is_sorted(a, lo, hi):
	for i in range(lo, hi - 1):
		if a[i] > a[i + 1]:
			return False
	return True
input()
arr = list(map(int, input().split(' ')))
print(snap(arr, 0, len(arr)))


def check_array(array):
	if all((array[i] <= array[i + 1] for i in range(len(array) - 1))):
		return len(array)
	return max(check_array(array[:len(array) // 2]), check_array(array[len(array) // 2:]))

def main():
	n = int(input())
	nums = list(map(int, input().split()))
	print(check_array(nums))
main()


ans = []

def top(a, l, r):
	if list(a[l:r]) == list(sorted(a[l:r])):
		ans.append(a[l:r])
	else:
		top(a, l, (l + r) // 2)
		top(a, (l + r) // 2, r)
n = int(input())
a = list(map(int, input().split()))
l = 1
top(a, 0, n)
for i in ans:
	if len(i) > l:
		l = len(i)
print(l)


k = 0

def recur(li):
	global k
	t = li.copy()
	t.sort()
	if li == t:
		if len(li) > k:
			k = len(li)
	else:
		recur(li[0:len(li) // 2])
		recur(li[len(li) // 2:])
q = int(input())
s = [int(n) for n in input().split()]
recur(s)
print(k)


def solve(l):
	length = len(l)
	if length <= 1:
		return length
	elif l == sorted(l):
		return length
	return max(solve(l[:length // 2]), solve(l[length // 2:]))
num = input()
array = [int(x) for x in input().split()]
print(solve(array))


n = int(input())
s = map(int, input().split())
s = list(s)
ss = [s]
while len(ss) > 0:
	a = ss.pop(0)
	flag = True
	for i in range(len(a) - 1):
		if a[i] > a[i + 1]:
			k = len(a) // 2
			l = a[0:k]
			r = a[k:len(a)]
			ss.append(l)
			ss.append(r)
			flag = False
			break
	if flag:
		print(len(a))
		break


from math import sqrt, ceil, floor
from sys import stdin, stdout
from heapq import heapify, heappush, heappop
import string

def q(l):
	if len(l) == 1:
		return [1]
	if sorted(l) == l:
		return l
	if len(q(l[:len(l) // 2])) > len(q(l[len(l) // 2:])):
		return q(l[:len(l) // 2])
	else:
		return q(l[len(l) // 2:])
n = int(stdin.readline())
a = list(map(int, stdin.readline().split()))
print(len(q(a)))


input()
a = list(map(int, input().split()))
for i in [16, 8, 4, 2, 1]:
	if len(a) >= i:
		for q in range(0, len(a), i):
			if a[q:q + i] == sorted(a[q:q + i]):
				print(i)
				exit()


def thanos_general(lst):
	if lst != sorted(lst):
		twosp = int(len(lst) / 2)
		list_a = lst[:twosp]
		list_b = lst[twosp:]
		t_a = thanos_general(list_a)
		t_b = thanos_general(list_b)
		if t_a > t_b:
			return t_a
		else:
			return t_b
	else:
		return len(lst)
n = int(input())
n_i = [int(s) for s in input().split()]
print(thanos_general(n_i))


n = int(input())
array = [int(x) for x in input().split(' ')]
array = [array]

def check(array):
	l = len(array)
	for i in range(1, l):
		if array[i - 1] > array[i]:
			return False
	return True
while check(array[0]) != True:
	half_len = len(array[0]) // 2
	array.append(array[0][:half_len])
	array.append(array[0][half_len:])
	array.remove(array[0])
print(len(array[0]))


def thanos_sort(data):
	flag = 0
	if all((data[i] <= data[i + 1] for i in range(len(data) - 1))):
		flag = 1
	if flag:
		return len(data)
	elif len(data) > 1:
		mid = int(len(data) / 2)
		ans1 = thanos_sort(data[0:mid])
		ans3 = thanos_sort(data[mid:])
	else:
		return 1
	if ans1 > ans3:
		return ans1
	else:
		return ans3
length = int(input())
numbers = list(map(int, input().split()))
ans = thanos_sort(numbers)
print(ans)


def snap(l, n):
	if n == 1:
		return 1
	if n == 2:
		if l[0] <= l[1]:
			return 2
		else:
			return 1
	if l == sorted(l):
		return n
	else:
		return max(snap(l[0:int(n / 2)], int(n / 2)), snap(l[int(n / 2):n], int(n / 2)))
n = int(input())
l = input().split()
for i in range(n):
	l[i] = int(l[i])
print(snap(l, n))


def go(l, r):
	if s[l:r + 1] == sorted(s[l:r + 1]):
		return r - l + 1
	if l == r:
		return 1
	m = (l + r) // 2
	return max(go(l, m), go(m + 1, r))
n = int(input())
s = list(map(int, input().split()))
print(go(0, n - 1))


n = int(input())
l = [int(j) for j in input().split()]
flag = 0
q = [l]
mn = []
while n != 1 and (not flag):
	z = q[-1]
	q.pop()
	flag = 1
	for i in range(1, n):
		if not z[i] >= z[i - 1]:
			flag = 0
	if flag:
		break
	else:
		t = n // 2
		mn.append(z[:t])
		mn.append(z[t:])
	if len(q) == 0:
		q = mn[:]
		mn = []
		n = n // 2
print(n)


def thanos_sort(numbers_list, list_length):
	for i in range(list_length - 1):
		if int(numbers_list[i]) > int(numbers_list[i + 1]):
			if i < int(len(numbers_list) / 2):
				del numbers_list[:int(len(numbers_list) / 2)]
			else:
				del numbers_list[int(len(numbers_list) / 2):]
			list_length = len(numbers_list)
			return thanos_sort(numbers_list, list_length)
	return len(numbers_list)
list_len = int(input())
list_of_nums = list(map(int, input().split()))
print(thanos_sort(list_of_nums, list_len))


def solve(a):
	if a == sorted(a):
		return len(a)
	else:
		return max(solve(a[int(len(a) / 2):]), solve(a[:int(len(a) / 2)]))
n = int(input())
a = list(map(int, input().split(' ')))
print(solve(a))


n = int(input())
arr = list(map(int, input().split()))

def check(i, j, arr):
	if i == j:
		return 1
	mid = (i + j) // 2
	left = check(i, mid, arr)
	right = check(mid + 1, j, arr)
	if left == mid - i + 1 and right == j - mid and (arr[mid] <= arr[mid + 1]):
		return left + right
	return max(left, right)
print(check(0, len(arr) - 1, arr))


n = int(input())
l1 = list(map(int, input().strip().split()))[:n]
l2 = l1

def sorted_list(l1, l2, n):
	if l1 == sorted(l1) or l2 == sorted(l2):
		print(len(l1))
		return
	l1 = l2[:int(n / 2)]
	l2 = l2[int(n / 2):]
	sorted_list(l1, l2, int(n / 2))
sorted_list(l1, l2, n)


import sys

def isSorted(array):
	for i in range(0, len(array) - int(1)):
		if array[i] > array[i + 1]:
			return False
	return True

def checkArray(array):
	if len(array) == int(1):
		return int(1)
	elif isSorted(array):
		return len(array)
	else:
		first = []
		second = []
		for i in range(len(array)):
			if int(len(array)) / int(2) > i:
				second.append(array[i])
			else:
				first.append(array[i])
		if checkArray(first) > checkArray(second):
			return checkArray(first)
		else:
			return checkArray(second)
sys.setrecursionlimit(1500)
count = int(input())
numbers = list(map(int, input().split()))
print(checkArray(numbers))


n = int(input())
res = ''
s = [int(x) for x in input().split()]

def partir(s):
	s1 = [s[i] for i in range(len(s) // 2)]
	s2 = [s[i] for i in range(len(s) // 2, len(s))]
	return (s1, s2)

def is_sorted(s):
	if sorted(s) == s:
		return True
	else:
		return False
S = 0
if is_sorted(s):
	res += str(len(s))
else:
	A = [x for x in partir(s)]
	while True:
		se_encontró = False
		for Ai in A:
			if is_sorted(Ai):
				res += str(len(Ai))
				se_encontró = True
				break
		if se_encontró:
			break
		else:
			A = [partir(x) for x in A]
			A = [y for x in A for y in x]
print(res)


n = int(input())
theList = [int(x) for x in input().split(' ')]
power = n
ok = 0
answer = -1
while power > 1 and ok == 0:
	for i in range(n // power):
		good = 1
		for j in range(power - 1):
			if theList[i * power + j] > theList[i * power + j + 1]:
				good = 0
				break
		if good == 1:
			ok = 1
			answer = power
			break
	power = power // 2
if ok == 0:
	print(1)
else:
	print(answer)


l = int(input())
lt = list(map(int, input().split()))

def is_sorted(lst):
	for (i, elem) in enumerate(lst):
		if i == len(lst) - 1:
			return True
		if elem - lst[i + 1] > 0:
			return False
		continue

def split_lists(lists, length):
	res = []
	for lst in lists:
		res.append(lst[:length // 2])
		res.append(lst[length // 2:])
	return res

def split_and_check(lists):
	sort_flag = False
	for lst in lists:
		if is_sorted(lst):
			sort_flag = True
	length = len(lists[0])
	return length if sort_flag or length == 1 else split_and_check(split_lists(lists, length))
print(split_and_check([lt]))


def rli():
	return list(map(int, input().split()))

def solve(nums):
	if nums == sorted(nums):
		return len(nums)
	return max(solve(nums[:len(nums) // 2]), solve(nums[len(nums) // 2:]))

def main():
	input()
	nums = rli()
	print(solve(nums))
main()


n = int(input())
a = list(map(int, input().split()))
ans = 0
for i in range(n):
	if i == 0 or i & i + 1 == 0:
		for j in range(0, n, i + 1):
			go = 1
			for x in range(j + 1, j + i + 1):
				if a[x] < a[x - 1]:
					go = 0
			if go:
				ans = i + 1
print(ans)


size = int(input())
values = list(map(int, input().split()))
result = 0

def tsort(values):
	global result
	if sorted(values) == values:
		result = max(result, len(values))
		return
	tsort(values[:len(values) // 2])
	tsort(values[len(values) // 2:])
tsort(values)
print(result)


def sortTanos(arr: list):
	if isSorted(arr):
		return len(arr)
	else:
		arr1 = arr[:len(arr) // 2]
		arr2 = arr[len(arr) // 2:]
		return max(sortTanos(arr1), sortTanos(arr2))

def isSorted(arr: list):
	prev = 0
	for i in arr:
		if i < prev:
			return False
		prev = i
	return True
n = int(input())
a = list(map(int, input().split()))
print(sortTanos(a))


def fun(arr):
	if arr == sorted(arr, key=int):
		return len(arr)
	res = max(fun(arr[:len(arr) // 2]), fun(arr[len(arr) // 2:]))
	return res
input()
arg = input().split(' ')
print(fun(arg))


import math
import sys
inp = sys.stdin.read().split()
inp.remove(inp[0])
inp = [int(i) for i in inp]
l = len(inp)
power = int(math.log(l, 2))
maximum = 1
a = [2 ** i for i in range(power + 1)]
for m in a:
	lists = []
	l1 = int(l / m)
	for j in range(2 ** (m - 1)):
		new = [k for k in inp[j * l1:j * l1 + l1]]
		if new != []:
			if sorted(new) == new:
				if len(new) >= maximum and len(new) % 2 == 0:
					maximum = len(new)
print(maximum)


def check(lst):
	for i in range(len(lst) - 1):
		if lst[i] > lst[i + 1]:
			return 0
	return 1

def sor_thanos(a):
	(result, n) = (1, len(a))
	for i in range(5):
		t = 2 ** i
		if t > n:
			break
		for k in range(0, n, t):
			if check(a[k:k + t]):
				result = t
	return result
n = int(input())
b = [int(j) for j in input().split()]
print(sor_thanos(b))


class Solution:

	def isSorted(self, array):
		i = 0
		n = len(array)
		while i < n - 1:
			if array[i] > array[i + 1]:
				return False
			i += 1
		return True

	def thanosSort(self, array):
		if self.isSorted(array):
			return len(array)
		return max(self.thanosSort(array[0:len(array) // 2]), self.thanosSort(array[len(array) // 2:]))
sol = Solution()
n = int(input().strip())
array = list(map(int, input().strip().split()))
print(sol.thanosSort(array))


n = int(input())
lst = list(map(int, input().split()))
flag = 0
while True:
	if n == 1:
		print(n)
		break
	for i in range(0, len(lst), n):
		if lst[i:i + n] == sorted(lst[i:i + n]):
			flag = 1
			print(n)
			break
	if flag == 1:
		break
	n = n // 2


n = int(input())
nums = list(map(int, input().split()))
stack = [nums]
while stack:
	l = stack.pop(0)
	if len(l) == 1:
		print(1)
		break
	if l == sorted(l):
		print(len(l))
		break
	stack.append(l[:len(l) // 2])
	stack.append(l[len(l) // 2:])


import sys

def is_sorted(t):
	lt = len(t)
	for i in range(1, lt):
		if t[i] < t[i - 1]:
			return False
	return True
n = int(input())
a = [int(x) for x in input().split()]
r = n
while True:
	for i in range(0, n, r):
		if is_sorted(a[i:i + r]):
			print(r)
			sys.exit(0)
	r = r // 2


n = int(input())
a = list(map(int, input().split()))
tmp = 1
c = 1
while tmp <= n:
	for i in range(0, n, tmp):
		if a[i:tmp + i] == sorted(a[i:tmp + i]):
			c = tmp
	tmp *= 2
print(c)


def sp(a, n):
	(k, m) = divmod(len(a), n)
	return (a[i * k + min(i, m):(i + 1) * k + min(i + 1, m)] for i in range(n))
n = input()
mass = list(map(int, input().split()))
k = 1
for i in range(0, 14):
	size = list(sp(range(int(n)), int(k)))
	for t in range(0, int(k)):
		temp = []
		for j in size[t]:
			temp.append(int(mass[j]))
		if sorted(temp) == temp:
			print(len(temp))
			exit()
	k *= 2


n = int(input())
l = input().split(' ')
l = [int(e) for e in l]
assert n == len(l)

def is_sorted(l):
	for i in range(len(l) - 1):
		if l[i] > l[i + 1]:
			return False
	return True

def main(l):
	N = len(l)
	if is_sorted(l):
		return N
	n = N // 2
	return max(main(l[:n]), main(l[n:]))
print(main(l))


def solve():
	num_el = int(input())
	lst = input()
	lst = lst.split(' ')
	lst = [int(i) for i in lst]
	while num_el > 1:
		temp = lst[0]
		count = 0
		for (ind, el) in enumerate(lst):
			if el < temp:
				if ind < num_el / 2:
					lst = lst[int(num_el / 2):]
				else:
					lst = lst[:int(num_el / 2)]
				num_el = num_el / 2
				break
			else:
				temp = el
				count += 1
		if count == num_el:
			return int(num_el)
	return 1
print(solve())


n = int(input())
A = list(map(int, input().split()))

def calc(X):
	if X == sorted(X):
		return len(X)
	A = X[:len(X) // 2]
	B = X[len(X) // 2:]
	return max(calc(A), calc(B))
print(calc(A))


n = int(input())
arr = list(map(int, input().split()))
ans = [1]

def fun(arr, ans):
	flag = True
	for i in range(len(arr) - 1):
		if arr[i] > arr[i + 1]:
			flag = False
			fun(arr[0:len(arr) // 2], ans)
			fun(arr[len(arr) // 2:], ans)
			return
	ans[0] = max(ans[0], len(arr))
	return
fun(arr, ans)
print(ans[0])


n = int(input())
m = list(map(int, input().split()))

def tsort(l, a):
	c = True
	for i in range(1, a):
		if l[i] < l[i - 1]:
			c = False
			break
	if not c:
		return max(tsort(l[:a // 2], a // 2), tsort(l[a // 2:], a // 2))
	else:
		return a
print(tsort(m, n))


def merge(arr, l, m, r):
	n1 = m - l + 1
	n2 = r - m
	global maxcount
	L = [0] * n1
	R = [0] * n2
	for i in range(0, n1):
		L[i] = arr[l + i]
	for j in range(0, n2):
		R[j] = arr[m + 1 + j]
	x = L + R
	temp = list(x)
	x.sort()
	if x == temp:
		if len(x) > maxcount:
			maxcount = len(x)

def mergeSort(arr, l, r):
	if l < r:
		m = (l + r) // 2
		mergeSort(arr, l, m)
		mergeSort(arr, m + 1, r)
		merge(arr, l, m, r)
global maxcount
maxcount = 1
n = int(input())
a = list(map(int, input().split()))
mergeSort(a, 0, n - 1)
print(maxcount)


n = int(input())
a = list(map(int, input().strip().split()))
if a == sorted(a):
	print(n)
	exit()
else:
	b = [i for i in reversed(a)]
	if b == sorted(a):
		print(1)
		exit()
x = n // 2
c = []
while x != 1:
	for i in range(0, n, x):
		y = a[i:i + x]
		if y == sorted(y):
			c.append(len(y))
	x = x // 2
print(max(c))


n = int(input())
a = [int(x) for x in input().split()]
found = False
half = len(a)
while half > 1:
	for i in range(len(a) // half):
		for j in range(1, half):
			index = i * half + j
			if a[index] < a[index - 1]:
				break
		else:
			found = True
			break
	if found:
		break
	half >>= 1
print(half)


def isSort(arr):
	if arr == sorted(arr):
		return len(arr)
	else:
		return max(isSort(arr[len(arr) // 2:]), isSort(arr[:len(arr) // 2]))
n = int(input())
print(isSort(list(map(int, input().split()))))


def is_sorted(a):
	for i in range(len(a) - 1):
		if a[i] > a[i + 1]:
			return 0
	return 1

def thanos_sort(a):
	if is_sorted(a):
		global rec
		rec.append(len(a))
	else:
		thanos_sort(a[0:len(a) // 2])
		thanos_sort(a[len(a) // 2:len(a)])
n = int(input())
a = [int(num) for num in input().split()]
rec = []
thanos_sort(a)
print(max(rec))


def ar(n):
	if len(n) == 1:
		return 1
	if sorted(n) == n:
		return len(n)
	b = len(n) // 2
	return max(ar(n[:b]), ar(n[b:]))
n = int(input())
l = list(map(int, input().split()))
print(ar(l))


n = int(input(''))
a = input('').split()
for i in range(n):
	a[i] = int(a[i])
block_size = n

def sorted_l(b):
	curr_max = -1
	for item in b:
		if item < curr_max:
			return False
		curr_max = item
	return True
while block_size >= 1:
	checkk = False
	for i in range(0, n, block_size):
		if sorted_l(a[i:i + block_size]):
			checkk = True
			break
	if checkk:
		print(block_size)
		break
	block_size = block_size // 2


def ifs(arr):
	values = [-1]
	count = 1
	for i in range(len(arr) - 1):
		if arr[i] <= arr[i + 1]:
			count += 1
		else:
			values.append(count)
			count = 1
	values.append(count)
	return max(values)
input()
arr = [int(i) for i in input().split()]
while arr != sorted(arr):
	if ifs(arr[:len(arr) // 2]) > ifs(arr[len(arr) // 2:]):
		arr = arr[:len(arr) // 2]
	else:
		arr = arr[len(arr) // 2:]
print(len(arr))


def functionfab(arr):
	len_arr = len(arr)
	if len_arr == 1:
		return 1
	if sorted(arr) == arr:
		return len(arr)
	return max(functionfab(arr[:len_arr // 2]), functionfab(arr[len_arr // 2:]))
input()
arr = list(map(int, input().split()))
print(functionfab(arr))


n = input()
n = int(n)
v = list(map(int, input().split()))
max1 = 1
pow = 2
ok = 1
while pow <= n:
	ok = 0
	for i in range(0, n, pow):
		if ok == 0:
			ok = 1
			for j in range(i, i + pow - 1):
				if v[j] > v[j + 1]:
					ok = 0
			if ok == 1:
				max1 = pow
				break
		else:
			break
	pow *= 2
print(max1)


size = int(input())
array = [int(element) for element in input().split()]
results = []

def IsSorted(array, start, end):
	for i in range(start, end):
		if array[i] > array[i + 1]:
			return False
	return True

def Solve(array, start, end):
	if IsSorted(array, start, end):
		results.append(end - start + 1)
		return
	m = (start + end) // 2
	Solve(array, start, m)
	Solve(array, m + 1, end)
Solve(array, 0, size - 1)
print(max(results))


def getans(lst, n):
	if lst == sorted(lst):
		return len(lst)
	n = int(n / 2)
	return max(getans(lst[:n], n), getans(lst[n:], n))
n = int(input())
lst = list(map(int, input().split()))
print(getans(lst, n))


n = int(input())
arr = list(map(int, input().split()))

def f(arr):
	global m
	x = len(arr)
	if arr == sorted(arr):
		m = max(len(arr), m)
	elif x > 2:
		f(arr[:x // 2])
		f(arr[x // 2:])
	else:
		m = max(m, 1)
m = 0
f(arr)
print(m)


def retl(arr):
	if len(arr) == 1:
		return 1
	elif all((arr[i] <= arr[i + 1] for i in range(len(arr) - 1))):
		return len(arr)
	else:
		return max(retl(arr[0:int(len(arr) / 2)]), retl(arr[int(len(arr) / 2):len(arr)]))
n = int(input())
arr = list(map(int, input().split(' ')))
print(retl(arr))


import math

def sol():

	def is_sorted(arr):
		for i in range(1, len(arr)):
			if arr[i] < arr[i - 1]:
				return False
		return True
	n = int(input())
	a = list(map(int, input().split()))
	step_size = n
	count = n // step_size
	while step_size > 1:
		for i in range(count):
			roi = a[i * step_size:(i + 1) * step_size]
			if is_sorted(roi):
				print(step_size)
				return
		step_size //= 2
		count *= 2
	print(1)
sol()


numero = int(input())
ListaDeNumeros = list(map(int, input().split()))
while ListaDeNumeros[:] != sorted(ListaDeNumeros):
	if ListaDeNumeros[:int(len(ListaDeNumeros) / 2)] != sorted(ListaDeNumeros[:int(len(ListaDeNumeros) / 2)]):
		del ListaDeNumeros[0:int(len(ListaDeNumeros) / 2)]
	else:
		del ListaDeNumeros[int(len(ListaDeNumeros) / 2):int(len(ListaDeNumeros))]
print(len(ListaDeNumeros))


def thanos_sort(a):
	if len(a) == 1:
		return (1, True)
	else:
		l = len(a)
		left = a[:int(l / 2)]
		right = a[int(l / 2):]
		(x1, b1) = thanos_sort(left)
		(x2, b2) = thanos_sort(right)
		if b1 and b2:
			if left[-1] <= right[0]:
				return (2 * x1, True)
			else:
				return (x1, False)
		elif b1 and (not b2):
			return (x1, False)
		elif not b1 and b2:
			return (x2, False)
		else:
			return (max(x1, x2), False)
n = int(input())
a = list(map(int, input().split()))
(x, b) = thanos_sort(a)
print(x)


def tanos(a, q, n, b):
	if q == 0 and n > 1:
		i = 0
		j = 0
		while j == 0:
			if a[i] <= a[i + 1]:
				i += 1
			else:
				j = 2
			if i == n - 1:
				j += 1
		if j == 1:
			q = 1
			b.append(n)
			return 0
		else:
			tanos(a[:int(n / 2)], q, int(n / 2), b)
			tanos(a[int(n / 2):], q, int(n / 2), b)
	else:
		b.append(n)
		return 0
n = int(input())
a = [int(s) for s in input().split()]
b = []
q = 0
tanos(a, q, n, b)
print(max(b))


from collections import defaultdict as DD
from bisect import bisect_left as BL
from bisect import bisect_right as BR
from itertools import combinations as IC
from itertools import permutations as IP
from random import randint as RI
import sys
MOD = pow(10, 9) + 7

def IN(f=0):
	if f == 0:
		return [int(i) for i in sys.stdin.readline().split()]
	else:
		return int(sys.stdin.readline())
n = IN(1)
a = IN()

def f(a):
	if sorted(a) == a:
		return True
	return False
if n == 1:
	print(1)
elif n == 2:
	if sorted(a) == a:
		print(2)
	else:
		print(1)
elif n == 4:
	q1 = a[:2]
	q2 = a[2:]
	if f(a):
		print(4)
	elif f(q1) or f(q2):
		print(2)
	else:
		print(1)
elif n == 8:
	if sorted(a) == a:
		print(8)
	else:
		f = 0
		for i in range(0, n, 4):
			if sorted(a[i:i + 4]) == a[i:i + 4]:
				f = 1
				break
		if f == 1:
			print(4)
		else:
			f = 0
			for i in range(0, n, 2):
				if sorted(a[i:i + 2]) == a[i:i + 2]:
					f = 1
					break
			if f == 1:
				print(2)
			else:
				print(1)
elif sorted(a) == a:
	print(16)
else:
	f = 0
	for i in range(0, n, 8):
		if sorted(a[i:i + 8]) == a[i:i + 8]:
			f = 1
			break
	if f == 1:
		print(8)
	else:
		f = 0
		for i in range(0, n, 4):
			if sorted(a[i:i + 4]) == a[i:i + 4]:
				f = 1
				break
		if f == 1:
			print(4)
		else:
			f = 0
			for i in range(0, n, 2):
				if sorted(a[i:i + 2]) == a[i:i + 2]:
					f = 1
					break
			if f == 1:
				print(2)
			else:
				print(1)


n = int(input())
b = input()
ar1 = b.split(' ')
arrr = list(map(lambda x: int(x), ar1))
index = []

def main(arr):
	i = 0
	while i < len(arr) - 1 and len(arr) != 1:
		key = arr[i]
		if arr[i + 1] < key:
			main(arr[0:len(arr) // 2])
			main(arr[len(arr) // 2:len(arr)])
			i = 0
			break
		i += 1
	index.append(i + 1)
main(arrr)
print(max(index))


n = int(input())
ar1 = list(map(int, input().split()))

def tanos(ar):
	m = len(ar)
	if ar == sorted(ar):
		return m
	else:
		return max(tanos(ar[:int(m / 2)]), tanos(ar[int(m / 2):]))
print(tanos(ar1))


ii = lambda : int(input())
mi = lambda : map(int, input().split())
li = lambda : list(mi())

def rec(a):
	if all((a[i] <= a[i + 1] for i in range(len(a) - 1))):
		return len(a)
	x = len(a) // 2
	return max(rec(a[:x]), rec(a[x:]))
ii()
print(rec(li()))


def fun(arr):
	for i in range(len(arr) - 1):
		if arr[i] > arr[i + 1]:
			return False
	return True

def maxlen(arr):
	if fun(arr):
		return len(arr)
	else:
		return max(maxlen(arr[:len(arr) // 2]), maxlen(arr[len(arr) // 2:]))
n = int(input())
arr = list(map(int, input().split()))
print(maxlen(arr))


def back(L):
	if len(L) == 1:
		return 1
	if len(L) == 2:
		return [1, 2][sorted(L) == L]
	elif sorted(L) == L:
		return len(L)
	else:
		return max(back(L[:len(L) // 2]), back(L[len(L) // 2:]))
n = int(input())
L = list(map(int, input().split()))
print(back(L))


import math

def tanos(n, a):
	while n != 1:
		x = False
		for i in range(0, n, 2):
			if not a[i] or not a[i + 1] or a[i][1] > a[i + 1][0]:
				a[i // 2] = False
			else:
				(a[i // 2], x) = ([a[i][0], a[i + 1][1]], True)
		if not x:
			return len(a) // n
		n //= 2
	return len(a)
print(tanos(int(input()), list(map(lambda i: [int(i), int(i)], input().split()))))


n = int(input())
nums = list(map(int, input().split()))
flag = True
ans = 0

def sol(nums):
	global ans, flag
	flag = True
	for i in range(len(nums) - 1):
		if nums[i] > nums[i + 1]:
			sol(nums[:len(nums) // 2])
			sol(nums[len(nums) // 2:])
			flag = False
	if flag == False:
		return
	if flag == True:
		if len(nums) > ans:
			ans = len(nums)
sol(nums)
print(ans)


def isSorted(lst):
	result = True
	for f in range(len(lst) - 1):
		if lst[f] > lst[f + 1]:
			result = False
			break
	return result

def mergeSort(lst):
	if len(lst) == 1 or isSorted(lst):
		return len(lst)
	mid = len(lst) // 2
	leftSide = lst[:mid]
	rightSide = lst[mid:]
	if isSorted(leftSide) and isSorted(rightSide):
		if len(leftSide) > len(rightSide):
			return len(leftSide)
		else:
			return len(rightSide)
	elif isSorted(leftSide):
		return len(leftSide)
	elif isSorted(rightSide):
		return len(rightSide)
	else:
		return max(mergeSort(leftSide), mergeSort(rightSide))
arrLength = int(input())
arr = input().split(' ')
arrNumber = list(map(lambda x: int(x), arr))
print(mergeSort(arrNumber))


def CheckSort(l) -> bool:
	for i in range(0, len(l) - 1):
		if l[i + 1] < l[i]:
			return False
	return True
n = int(input())
l = list(map(int, input().split()))
while True:
	for i in range(0, len(l), n):
		if CheckSort(l[i:i + n]):
			print(n)
			exit(0)
	n //= 2


n = int(input())
line2 = input().split(' ')
lst = [int(x) for x in line2]
lengths = []

def fun(lst, lengths):
	if lst == sorted(lst):
		lengths.append(len(lst))
		return
	if len(lst) == 1:
		lengths.append(1)
		return
	fun(lst[:int(len(lst) / 2)], lengths)
	fun(lst[int(len(lst) / 2):], lengths)
fun(lst, lengths)
print(max(lengths))


import sys
n = int(input())
a = list(map(int, input().split()))
ans = []

def thanos(lst):
	length = len(lst)
	half = int(length / 2)
	first = lst[0:half]
	second = lst[half:]
	if sorted(first) != first:
		thanos(first)
	else:
		ans.append(len(first))
		return
	if sorted(second) != second:
		thanos(second)
	else:
		ans.append(len(second))
		return
if sorted(a) != a:
	thanos(a)
	ans.sort()
	print(ans[-1])
else:
	print(len(a))


n = int(input())
l = list(map(int, input().split()))
cmp = l[0]
flag = 0
lth = 1
if n >= 2:
	for i in range(0, len(l), 2):
		if l[i] < l[i + 1]:
			lth = 2
if n >= 4:
	for i in range(0, len(l), 4):
		if l[i] <= l[i + 1] <= l[i + 2] <= l[i + 3]:
			lth = 4
if n >= 8:
	for i in range(0, len(l), 8):
		if l[i] <= l[i + 1] <= l[i + 2] <= l[i + 3] <= l[i + 4] <= l[i + 5] <= l[i + 6] <= l[i + 7]:
			lth = 8
if n == 16:
	for i in l:
		if cmp > i:
			flag = 1
		cmp = i
if flag == 0 and n == 16:
	lth = 16
print(lth)


from collections import deque
n = int(input())
a = list(map(int, input().split()))

def sortTanos(a, n):
	queue = deque([(0, n)])
	while queue:
		(l, r) = queue.popleft()
		if a[l:r] == sorted(a[l:r]):
			return r - l
		m = l + r >> 1
		queue.append((l, m))
		queue.append((m, r))
print(sortTanos(a, n))


def is_sorted(arr, left, right):
	for i in range(left, right):
		if arr[i] > arr[i + 1]:
			return False
	return True

def thanos(arr, left, right):
	if left >= right:
		return 1
	if is_sorted(arr, left, right):
		return right - left + 1
	else:
		mid_left = int((right - left) / 2) + left
		return max(thanos(arr, left, mid_left), thanos(arr, mid_left + 1, right))
n = int(input())
arr = str(input())
arr = [int(a) for a in arr.split(' ')]
print(thanos(arr, 0, n - 1))


(n, arr) = (int(input()), list(map(int, input().split())))
ans = 0

def gen(left, a):
	global ans
	if left == 0:
		return
	t = False
	for i in range(1, len(a)):
		if a[i] < a[i - 1]:
			t = True
			break
	if not t:
		ans = max(ans, left)
	gen(left // 2, a[:left // 2])
	gen(left // 2, a[left // 2:])
gen(n, arr)
print(ans)


def thanos(array):
	if len(array) == 1:
		return 1
	elif len(array) == 2 and array == sorted(array):
		return 2
	elif array == sorted(array, reverse=True):
		return 1
	elif array == sorted(array):
		return len(array)
	else:
		return max(thanos(array[:len(array) // 2]), thanos(array[len(array) // 2:len(array)]))
n = int(input())
array = list(map(int, input().split()))
print(thanos(array))


def rMap():
	return map(int, input().split())

def rList():
	return list(map(int, input().split()))
n = int(input())
a = rList()

def tanos(a, n):
	if sorted(a) == a:
		return n
	else:
		return max(tanos(a[:n // 2], n // 2), tanos(a[n // 2:], n // 2))
print(tanos(a, n))


def checkSortedOrThanos(ms):
	if len(ms) == 1:
		return 1
	m = len(ms) // 2
	ln = checkSortedOrThanos(ms[:m])
	rn = checkSortedOrThanos(ms[m:])
	if m == ln and m == rn and (ms[m - 1] <= ms[m]):
		return len(ms)
	return max(ln, rn)
n = int(input())
ms = list(map(int, input().split()))
print(checkSortedOrThanos(ms))


def thanos(a, s, e):
	if sorted(a[s:e]) == a[s:e]:
		return e - s
	else:
		return max(thanos(a, s, int((s + e) / 2)), thanos(a, int((s + e) / 2), e))
n = int(input())
a = [int(i) for i in input().split()]
maxx = thanos(a, 0, n)
print(maxx)


ans = 0

def f(b):
	global ans
	if all((b[i] <= b[i + 1] for i in range(len(b) - 1))):
		ans = max(ans, len(b))
		return
	else:
		f(b[:len(b) // 2])
		f(b[len(b) // 2:])
_ = input()
f(list(map(int, input().split())))
print(ans)


import math

def check(arr):
	if len(arr) == 1:
		return 1
	md = len(arr) // 2
	(c1, c2) = (1, 1)
	(maxN1, maxN2) = (1, 1)
	for i in range(1, md):
		if arr[i] >= arr[i - 1]:
			c1 += 1
		elif c1 > maxN1:
			maxN1 = c1
			c1 = 1
	if c1 > maxN1:
		maxN1 = c1
	for i in range(md + 1, len(arr)):
		if arr[i] >= arr[i - 1]:
			c2 += 1
		elif c2 > maxN2:
			maxN2 = c2
			c2 = 1
	if c2 > maxN2:
		maxN2 = c2
	if maxN1 == md and maxN2 == len(arr) - md:
		if arr[md] < arr[md - 1]:
			return max(check(arr[:md]), check(arr[md:]))
		return maxN1 + maxN2
	elif maxN1 >= maxN2:
		return check(arr[:md])
	else:
		return check(arr[md:])
n = int(input())
arr = list(map(int, input().split()))
print(check(arr))


def check(a):
	for i in range(1, len(a)):
		if a[i] < a[i - 1]:
			return False
	return True

def dfs(a):
	if check(a):
		return len(a)
	else:
		return max(dfs(a[0:len(a) // 2]), dfs(a[len(a) // 2:len(a)]))
n = int(input())
a = list(map(int, input().split()))
print(dfs(a))


def func(arr):
	if len(arr) == 1:
		return 1
	for i in range(len(arr) - 1):
		if arr[i] > arr[i + 1]:
			len_left = func(arr[:len(arr) // 2])
			len_right = func(arr[len(arr) // 2:])
			return max(len_left, len_right)
	return len(arr)
k = int(input())
print(func(list(map(int, input().split()))))


data = int(input())
ls = list(map(int, input().split()))

def ans(i, j):
	n = j - i
	if sorted(ls[i:j]) == ls[i:j]:
		return n
	else:
		mid = (i + j) // 2
		return max(ans(i, mid), ans(mid, j))
print(ans(0, data))


n = int(input())
ar = list(map(int, input().split()))

def sortorder(a):
	mid = len(a) // 2
	if sorted(a) == a:
		return len(a)
	else:
		return max(sortorder(a[:mid]), sortorder(a[mid:]))
print(sortorder(ar))


def list_sorted(test_list):
	if all((test_list[i] <= test_list[i + 1] for i in range(len(test_list) - 1))):
		return True
	else:
		return False

def check_max_sorted_portion(lis, n):
	if list_sorted(lis):
		return len(lis)
	else:
		l1 = check_max_sorted_portion(lis[0:n // 2], n // 2)
		l2 = check_max_sorted_portion(lis[n // 2:n], n // 2)
		return max(l1, l2)
n = int(input())
lis = list(map(int, input().split(' ')))
print(check_max_sorted_portion(lis, n))


lens = []

def check(arr, m):
	if sorted(arr) == arr:
		lens.append(m)
	else:
		return (check(arr[:m // 2], m // 2), check(arr[m // 2:], m // 2))
n = int(input())
a = list(map(int, input().split()))
check(a, n)
print(max(lens))


def is_sorted(array):
	return array == sorted(array)

def max_count(n, array):
	if n > 1:
		if is_sorted(array):
			return n
		n //= 2
		left = max_count(n, array[:n])
		right = max_count(n, array[n:])
		return max(left, right)
	else:
		return 1
n = int(input())
array = list(map(int, input().split()))
print(max_count(n, array))


def helper(arr):
	if arr == sorted(arr):
		return len(arr)
	return max(helper(arr[:len(arr) // 2]), helper(arr[len(arr) // 2:]))

def main():
	n = int(input())
	arr = list(map(int, input().split()))
	print(helper(arr))
	return 0
main()


import sys
input = sys.stdin.readline

def is_sorted(a, n):
	if n == 1:
		return 1
	flag = 1
	for i in range(1, n):
		if a[i - 1] > a[i]:
			flag = 0
	return flag

def f(a, n):
	if is_sorted(a, n):
		return n
	return max(f(a[:n // 2], n // 2), f(a[n // 2:], n // 2))
t = 1
for _ in range(t):
	n = int(input())
	a = list(map(int, input().split()))
	ans = f(a, n)
	print(ans)


def check(x):
	return x == sorted(x)

def fun(x):
	if check(x):
		return len(x)
	return max(fun(x[len(x) // 2:]), fun(x[:len(x) // 2]))
n = int(input())
a = [int(e) for e in input().split()]
print(fun(a))


from sys import stdin, stdout
input = stdin.readline

def im():
	return map(int, input().split())

def ii():
	return int(input())

def il():
	return list(map(int, input().split()))

def ins():
	return input()[:-1]

def check(lis):
	for i in range(1, len(lis)):
		if lis[i] < lis[i - 1]:
			return False
	return True

def rec(lis):
	if check(lis):
		return len(lis)
	else:
		mid = len(lis) // 2
		return max(rec(lis[:mid]), rec(lis[mid:]))
n = ii()
arr = il()
print(rec(arr))


n = int(input())
q = [list(map(int, input().split()))]
while True:
	curr = q.pop(0)
	if curr == sorted(curr):
		print(len(curr))
		exit()
	q.append(curr[:len(curr) // 2])
	q.append(curr[len(curr) // 2:])


def func(arr):
	if arr == sorted(arr):
		return len(arr)
	else:
		x = func(arr[:len(arr) // 2])
		y = func(arr[len(arr) // 2:])
		return max(x, y)
n = int(input())
arr = list(map(int, input().split()))
print(func(arr))


def thanos_sort(S, max_value):
	if len(S) <= max_value:
		return max_value
	if sorted(S) == S and len(S) > max_value:
		return len(S)
	max_value = thanos_sort(S[:int(len(S) / 2)], max_value)
	max_value = thanos_sort(S[int(len(S) / 2):], max_value)
	return max_value
n = input()
s = list(map(int, input().split(' ')))
print(thanos_sort(s, 1))


n = int(input())
tab = list(map(int, input().split()))
maximum = 0

def fonc(indexA, indexB):
	global maximum
	if indexB < indexA:
		return 0
	if tab[indexA:indexB] == sorted(tab[indexA:indexB]):
		maximum = max(maximum, indexB - indexA)
		return
	fonc(indexA, (indexA + indexB) // 2)
	fonc((indexA + indexB) // 2, indexB)
fonc(0, n)
print(maximum)


n = int(input())
a = list(map(int, input().split()))
x = 1

def dfs(l, r, leng):
	global x
	if leng == 1:
		return True
	(mid, length) = (l + r >> 1, leng // 2)
	(res1, res2) = (dfs(l, mid, length), dfs(mid, r, length))
	if res1 and res2 and (a[mid - 1] <= a[mid]):
		x = max(x, leng)
		return True
	return False
if dfs(0, n, n):
	x = n
print(x)


n = int(input())
a = [int(i) for i in input().split(' ')]

def snap(a):
	asort = a.copy()
	asort.sort()
	if a == asort:
		return len(a)
	if a[::-1] == asort:
		return 1
	return max(snap(a[:len(a) // 2]), snap(a[len(a) // 2:]))
print(snap(a))


n = int(input())
s = input()
s1 = s.split(' ')
l = []
for i in s1:
	l.append(int(i))

def isSorted(l):
	for i in range(1, len(l)):
		if l[i] >= l[i - 1]:
			continue
		else:
			return False
	return True

def f(lst, size):
	if size == 1 or isSorted(lst):
		return size
	else:
		return max(f(lst[0:int(size / 2)], int(size / 2)), f(lst[int(size / 2):int(size)], int(size / 2)))
print(f(l, len(l)))


n = int(input())
A = map(int, input().split())
B = list(A)
F = []

def check(i, C):
	global F
	if C == sorted(C):
		F.append(int(n / i))
		return n / i
	i = 2 * i
	D = C[:int(n / i)]
	E = C[int(n / i):]
	check(i, D)
	check(i, E)
check(1, B)
print(max(F))


def solve(left, right):
	ret = 1
	flag = False
	before = arr[left]
	for i in range(left, right):
		if before > arr[i]:
			flag = True
			break
		else:
			before = arr[i]
	if flag:
		ret = max(ret, solve(left, (left + right) // 2))
		ret = max(ret, solve((left + right) // 2, right))
	else:
		ret = right - left
	return ret
n = int(input())
arr = list(map(int, input().split()))
print(solve(0, n))


def thanos(a):
	b = a.copy()
	b.sort()
	if a == b:
		return len(a)
	else:
		return max(thanos(a[:len(a) // 2]), thanos(a[len(a) // 2:]))
n = int(input())
a = list(map(int, input().split()))
print(thanos(a))


def thsnosSort(n_, data):
	L = data.split()
	L = [[int(i) for i in L]]
	n = 1
	thrshold = n_
	if L[0] == sorted(L[0]):
		return thrshold
	while True:
		temp = list()
		n *= 2
		if n == thrshold:
			return 1
			break
		for L_ in L:
			temp.append(L_[:int(thrshold / n)])
			temp.append(L_[int(thrshold / n):])
			if [item for item in temp if item == sorted(item)]:
				return len(temp[0])
		L = temp.copy()
n = input()
data = input()
print(thsnosSort(int(n), data))


def IsSorted(massive):
	if len(massive) == 1:
		return True
	for i in range(len(massive) - 1):
		if massive[i] > massive[i + 1]:
			return False
	return True

def recurs(masss):
	if IsSorted(masss):
		cot = len(masss)
		global maxcount
		maxcount = max(cot, maxcount)
		return
	recurs(masss[:int(len(masss) / 2)])
	recurs(masss[int(len(masss) / 2):])
a = int(input())
mass = [int(x) for x in input().split()]
cot = 0
maxcount = 0
recurs(mass)
print(maxcount)


n = int(input())
l = list(map(int, input().split()))

def find(l, n):
	if l == sorted(l):
		return n
	else:
		return max(find(l[:n // 2], n // 2), find(l[n // 2:], n // 2))
print(find(l, n))


n = int(input())
a = list(map(int, input().split()))
maximum = []

def check_sort(b):
	if len(b) == 1:
		maximum.append(1)
	elif b == sorted(b):
		maximum.append(len(b))
	else:
		check_sort(b[0:len(b) // 2])
		check_sort(b[len(b) // 2:])
check_sort(a)
print(max(maximum))


def xet(a, n, sl):
	b = int(n / sl)
	c = 0
	t = 0
	for i in range(b):
		c = i * sl
		t = 1
		for j in range(c, c + sl - 1):
			if a[j + 1] >= a[j]:
				t = t + 1
		if t == sl:
			return sl
	return 0
n = int(input())
a = list(map(int, input().split()))
t = xet(a, n, 2)
if t == 0 or n == 1:
	print(1)
else:
	sl = 4
	trc = 2
	while t != 0 and sl <= n:
		trc = t
		t = xet(a, n, sl)
		sl = sl * 2
	if t == 0:
		print(trc)
	else:
		print(t)


n = int(input())
num = list(map(int, input().split()))
if num == sorted(num):
	print(len(num))
elif num == sorted(num, reverse=True):
	print(1)
else:
	while n != 0:
		if num == sorted(num):
			print(n)
			break
		elif num[:n // 2] != sorted(num[:n // 2]):
			num = num[n // 2:]
			n = n // 2
		else:
			num = num[:n // 2]
			n = n // 2


def count(lst):
	lst2 = lst.copy()
	lst2.sort()
	if lst == lst2:
		return len(lst)
	cnt = max(count(lst[:len(lst) // 2]), count(lst[len(lst) // 2:]))
	return cnt
n = int(input())
lst = [int(s) for s in input().split()]
cnt = count(lst)
print(cnt)


def thanos(arr):
	if arr == sorted(arr):
		return len(arr)
	else:
		return max(thanos(arr[:len(arr) // 2]), thanos(arr[len(arr) // 2:]))
n = int(input())
a = list(map(int, input().split()))
res = thanos(a)
print(res)


import math
n = int(input())
count = math.log2(n)
data = [list(map(int, input().split(' ')))]
flag = False
for _ in range(int(count) + 1):
	data_tuple = (i for i in data)
	data = []
	for i in data_tuple:
		if i == sorted(i):
			print(len(i))
			flag = True
			break
		else:
			data.append(i[len(i) // 2:])
			data.append(i[:len(i) // 2])
	if flag:
		break


n = int(input())
inputlist = input().split(' ')
arr = []
for i in inputlist:
	arr += [int(i)]

def is_sorted(listed):
	return listed == sorted(listed)

def maxim(a, b):
	if a > b:
		return a
	else:
		return b

def thanos_snap(listed):
	if is_sorted(listed):
		return len(listed)
	else:
		return maxim(thanos_snap(listed[0:len(listed) // 2]), thanos_snap(listed[len(listed) // 2:len(listed)]))
print(thanos_snap(arr))


n = int(input())
arr = list(map(int, input().split()))

def f(a, l):
	u = True
	for i in range(l - 1):
		if a[i] > a[i + 1]:
			u = False
			break
	if u == True:
		return a
	else:
		r1 = f(a[:l // 2], l // 2)
		r2 = f(a[l // 2:], l // 2)
		if len(r1) > len(r2):
			return r1
		else:
			return r2
print(len(f(arr, n)))


def solve(l):
	n = len(l)
	if l == sorted(l):
		return len(l)
	else:
		return max(solve(l[:n // 2]), solve(l[n // 2:]))
t = int(input())
l = list(map(int, input().split()))
print(solve(l))


n = int(input())
l = list(map(int, input().split()))

def bin(l):
	p = l[:]
	if sorted(p) == p:
		return len(l)
	a = len(l) // 2
	return max(bin(l[:a]), bin(l[a:]))
print(bin(l))


n = int(input())
L = list(map(lambda x: int(x), input().split()))

def Thanos(l):
	if len(l) == 1:
		return 1
	if l == sorted(l):
		return len(l)
	return max(Thanos(l[:len(l) // 2]), Thanos(l[len(l) // 2:]))
print(Thanos(L))


n = int(input())
L = [int(x) for x in input().split()]
F = []
counter = 0
while len(F) != 1:
	F = []
	Ln = L.copy()
	for i in range(int(len(L) / 2 ** counter)):
		F.append([])
		for j in range(2 ** counter):
			F[-1].append(Ln[0])
			Ln.pop(0)
	flag = 0
	for i in F:
		if i == sorted(i):
			maxlen = 2 ** counter
			flag = 1
			break
	if flag == 0:
		break
	counter += 1
print(maxlen)


import random

def is_sorted(arr):
	sorted = True
	for i in range(1, len(arr)):
		if arr[i - 1] > arr[i]:
			sorted = False
			break
	return sorted

def sort_arr_left(arr):
	global a
	if len(arr) == 1:
		return 1
	if not is_sorted(arr):
		sort_arr_left(arr[len(arr) // 2:])
	if not is_sorted(arr):
		sort_arr_left(arr[:len(arr) // 2])
	else:
		a.append(len(arr))
a = [1]
length = int(input())
arr = list(map(int, input().split()))
sort_arr_left(arr)
print(max(a))


n = int(input())
a = list(map(int, input().split()))

def thanos(x, n):
	if x == sorted(x):
		return x
	l = thanos(x[:n // 2], n // 2) if x[:n // 2] != sorted(x[:n // 2]) else x[:n // 2]
	r = thanos(x[n // 2:], n // 2) if x[n // 2:] != sorted(x[n // 2:]) else x[n // 2:]
	if len(l) > len(r):
		return l
	return r
print(len(thanos(a, n)))


input()
l = [*map(int, input().split())]

def recurse(arr):
	n = len(arr)
	if arr == sorted(arr):
		return n
	m = n // 2
	return max(recurse(arr[:m]), recurse(arr[m:]))
print(recurse(l))


n = int(input())
a = list(map(int, input().split()))

def solve(arr):
	if len(arr) == 0:
		return 0
	if arr == sorted(arr):
		return len(arr)
	return max(solve(arr[:len(arr) // 2]), solve(arr[len(arr) // 2:]))
print(solve(a))


n = int(input())
l = [int(i) for i in input().split()]

def ma(l):
	if l == sorted(l):
		return len(l)
	else:
		return max(ma(l[:len(l) // 2]), ma(l[len(l) // 2:]))
print(ma(l))


n = int(input())
pop = list(map(int, input().split()))
g = n
ind = []
while g != 1:
	for i in range(int(n // g)):
		ind.append((0 + i * g, (i + 1) * g))
	g = int(g / 2)
massiv = []
for i in range(n):
	if i != n - 1:
		if pop[i] <= pop[i + 1]:
			massiv.append(1)
		else:
			massiv.append(0)
	else:
		massiv.append(0)
trig = False
for i in ind:
	if sum(massiv[i[0]:i[1]]) == len(massiv[i[0]:i[1]]) or (sum(massiv[i[0]:i[1]]) == len(massiv[i[0]:i[1]]) - 1 and massiv[i[1] - 1] == 0):
		print(len(massiv[i[0]:i[1]]))
		trig = True
		break
if not trig:
	print(1)


lenght = int(input())
lst = list(map(int, input().rstrip().split()))

def is_sorted(lst):
	for i in range(0, len(lst) - 1):
		if lst[i] > lst[i + 1]:
			return False
	return True

def thanossort(lst):
	if is_sorted(lst):
		return len(lst)
	j = 0
	while True:
		incr = len(lst) // pow(2, j)
		for i in range(0, len(lst), incr):
			sub_lst = lst[i:(i // incr + 1) * incr]
			if is_sorted(sub_lst):
				return len(sub_lst)
		j += 1
print(thanossort(lst))


n = int(input())
a = list(map(int, input().split(' ')))
l = len(a)
i = 0
while 2 ** i <= l:
	i += 1
q = i - 1
i = 1
m = 0
p = 0
while i <= 2 ** q:
	j = 0
	while j < l // i:
		t = a[i * j:i * j + i]
		temp = []
		for k in range(len(t)):
			temp.append(t[k])
		temp.sort()
		if temp == t:
			m = len(t)
		j += 1
	p += 1
	i = 2 ** p
print(m)


input()
n = [int(x) for x in input().split()]

def check(n):
	if len(n) == 1:
		return 1
	if sorted(n) == n:
		return len(n)
	else:
		return max(check(n[:len(n) // 2]), check(n[len(n) // 2:]))
print(check(n))


def sorted_length(l):
	if all((l[i] <= l[i + 1] for i in range(len(l) - 1))):
		return len(l)
	ll = sorted_length(l[:len(l) // 2])
	lr = sorted_length(l[len(l) // 2:])
	return max(ll, lr)
n = int(input())
l = [int(x) for x in input().split()]
print(sorted_length(l))


def is_sorted(a):
	for i in range(len(a) - 1):
		if a[i] > a[i + 1]:
			return i + 1
	return 0
length = input()
array = [int(i) for i in input().split()]
while True:
	cnt = is_sorted(array)
	if cnt == 0:
		break
	half = len(array) >> 1
	if cnt > half:
		array = array[:half]
	else:
		array = array[half:]
print(len(array))


n = int(input())
a = list(map(int, input().split(' ')))

def thanosSort(n, a):
	b = sorted(a)
	if b == a:
		return n
	else:
		n = n // 2
		m1 = thanosSort(n, a[:n])
		m2 = thanosSort(n, a[n:])
		return max(m1, m2)
ma = thanosSort(n, a)
print(ma)


from collections import deque
n = int(input())
A = list(map(int, input().split()))
Ans = 1
for m in (2, 4, 8, 16, 32, 64):
	if n >= m:
		K = A[:m]
		for i in range(m, n):
			if i % m == 0 and K == sorted(K):
				Ans = m
			K = K[1:]
			K.append(A[i])
		if K == sorted(K):
			Ans = m
print(Ans)


import math
n = int(input())
arr = [int(x) for x in input().split()]

def longest_sorted(st, ed):
	if st > ed:
		return 0
	if st == ed:
		return 1
	curr = 1
	mx = 1
	i = st + 1
	while i <= ed:
		if arr[i - 1] <= arr[i]:
			curr += 1
		else:
			mx = max(curr, mx)
			curr = 1
		i += 1
	return max(mx, curr)
ans = 1

def recur(st, ed):
	global ans
	if st == ed:
		return
	if ed - st == 1:
		if arr[st] <= arr[ed]:
			ans = max(ans, 2)
		return
	mid = math.floor((st + ed) / 2)
	if longest_sorted(st, ed) == ed - st + 1:
		ans = max(ans, ed - st + 1)
		return
	a = longest_sorted(st, mid)
	b = longest_sorted(mid + 1, ed)
	if a == mid - st + 1:
		ans = max(a, ans)
		return
	if b == mid - st + 1:
		ans = max(b, ans)
		return
	recur(st, mid)
	recur(mid + 1, ed)
recur(0, n - 1)
print(ans)


n = int(input())
a = list(map(int, input().split()))
c = 0
l1 = []
l2 = []
l3 = []
l4 = []
l5 = []
l6 = []
l7 = []
l8 = []
final = []
b = a[:]
b.sort()
if a == b:
	final.append(n)
if n == 1:
	final.append(1)
if n == 2:
	final.append(1)
if n == 4:
	for i in range(n // 2):
		l1.append(a[i])
	temp = l1[:]
	temp.sort()
	if l1 == temp:
		final.append(2)
	for i in range(n // 2, n):
		l2.append(a[i])
	temp = l2[:]
	temp.sort()
	if l2 == temp:
		final.append(2)
	final.append(1)
if n == 8:
	for i in range(n // 2):
		l1.append(a[i])
	temp = l1[:]
	temp.sort()
	if l1 == temp:
		final.append(4)
	for i in range(n // 2, n):
		l2.append(a[i])
	temp = l2[:]
	temp.sort()
	if l2 == temp:
		final.append(4)
	for i in range(len(l1) // 2):
		l3.append(l1[i])
	temp = l3[:]
	temp.sort
	if l3 == temp:
		final.append(2)
	for i in range(len(l1) // 2, len(l1)):
		l4.append(l1[i])
	temp = l4[:]
	temp.sort()
	if l4 == temp:
		final.append(2)
	for i in range(len(l2) // 2):
		l3.append(l2[i])
	temp = l3[:]
	temp.sort()
	if l3 == temp:
		final.append(2)
	for i in range(len(l2) // 2, len(l2)):
		l4.append(l2[i])
	temp = l4[:]
	temp.sort()
	if l4 == temp:
		final.append(2)
	final.append(1)
if n == 16:
	for i in range(n // 2):
		l1.append(a[i])
	temp = l1[:]
	temp.sort()
	if l1 == temp:
		final.append(8)
	for i in range(n // 2, n):
		l2.append(a[i])
	temp = l2[:]
	temp.sort()
	if l2 == temp:
		final.append(8)
	for i in range(len(l1) // 2):
		l3.append(l1[i])
	temp = l3[:]
	temp.sort()
	if l3 == temp:
		final.append(4)
	for i in range(len(l1) // 2, len(l1)):
		l4.append(l1[i])
	temp = l4[:]
	temp.sort()
	if l4 == temp:
		final.append(4)
	for i in range(len(l2) // 2):
		l5.append(l2[i])
	temp = l5[:]
	temp.sort()
	if l5 == temp:
		final.append(4)
	for i in range(len(l2) // 2, len(l2)):
		l6.append(l2[i])
	temp = l6[:]
	temp.sort()
	if l6 == temp:
		final.append(4)
	for i in range(len(l3) // 2):
		l7.append(l3[i])
	temp = l7[:]
	temp.sort()
	if l7 == temp:
		final.append(2)
	for i in range(len(l3) // 2, len(l3)):
		l8.append(l3[i])
	temp = l8[:]
	temp.sort()
	if l8 == temp:
		final.append(2)
	for i in range(len(l4) // 2):
		l7.append(l4[i])
	temp = l7[:]
	temp.sort()
	if l7 == temp:
		final.append(2)
	for i in range(len(l4) // 2, len(l4)):
		l8.append(l4[i])
	temp = l8[:]
	temp.sort()
	if l8 == temp:
		final.append(2)
	for i in range(len(l5) // 2):
		l7.append(l5[i])
	temp = l7[:]
	temp.sort()
	if l7 == temp:
		final.append(2)
	for i in range(len(l5) // 2, len(l5)):
		l8.append(l5[i])
	temp = l8[:]
	temp.sort()
	if l8 == temp:
		final.append(2)
	for i in range(len(l6) // 2):
		l7.append(l6[i])
	temp = l7[:]
	temp.sort()
	if l7 == temp:
		final.append(2)
	for i in range(len(l6) // 2, len(l6)):
		l8.append(l6[i])
	temp = l8[:]
	temp.sort()
	if l8 == temp:
		final.append(2)
	final.append(1)
out = max(final)
print(out)


Thanos_infinity_stones = Stevedies = int(input())
Avengers = [*map(int, input().split())]
while all((Avengers[j:j + Stevedies] != sorted(Avengers[j:j + Stevedies]) for j in range(0, Thanos_infinity_stones, Stevedies))):
	Stevedies //= 2
print(Stevedies)


def sort(massive):
	global maximal
	if list(sorted(massive)) == massive:
		if len(massive) > maximal:
			maximal = len(massive)
		return
	sort(massive[:len(massive) // 2])
	sort(massive[len(massive) // 2:])
n = int(input())
massive = [int(i) for i in input().split()]
maximal = 0
sort(massive)
print(maximal)


def isSorted(a):
	for i in range(1, len(a)):
		if a[i - 1] > a[i]:
			return False
	return True

def solve(a):
	if isSorted(a):
		return len(a)
	else:
		x = isSorted(a[:len(a) // 2])
		y = isSorted(a[len(a) // 2:])
		if x and y:
			return max(len(a) // 2, len(a) - len(a) // 2)
		if x:
			return len(a) // 2
		if y:
			return len(a) - len(a) // 2
		return max(solve(a[:len(a) // 2]), solve(a[len(a) // 2:]))
		return max(isSorted(a[:len(a) // 2]), isSorted(a[len(a) // 2:]))
n = int(input())
x = input().split()
a = []
for i in x:
	a.append(int(i))
print(solve(a))


def sort(a, n):
	if a == sorted(a):
		return n
	else:
		return max(sort(a[:n // 2], n // 2), sort(a[n // 2:], n // 2))
n = int(input())
z = []
a = input().split()
for i in a:
	z.append(int(i))
print(sort(z, n))


def fun(arr):
	temp = 0
	for i in range(1, len(arr)):
		if arr[i] < arr[i - 1]:
			temp = 1
			break
	if temp == 1:
		return max(fun(arr[:int(len(arr) / 2)]), fun(arr[int(len(arr) / 2):]))
	if temp == 0:
		return len(arr)
n = int(input())
a = [int(i) for i in input().split()]
print(fun(a))


n = int(input())
arr = list(map(int, input().split(' ')))
arrays = []
arr1 = [x for (idx, x) in enumerate(arr) if idx < n / 2]
arr2 = [x for (idx, x) in enumerate(arr) if idx >= n / 2]
arr3 = [x for (idx, x) in enumerate(arr) if idx < n / 4]
arr4 = [x for (idx, x) in enumerate(arr) if idx >= n / 4 and idx < n / 2]
arr5 = [x for (idx, x) in enumerate(arr) if idx >= n / 2 and idx < 3 * n / 4]
arr6 = [x for (idx, x) in enumerate(arr) if idx >= 3 * n / 4]
arr7 = [x for (idx, x) in enumerate(arr) if idx < n / 8]
arr8 = [x for (idx, x) in enumerate(arr) if idx >= n / 8 and idx < n / 4]
arr9 = [x for (idx, x) in enumerate(arr) if idx >= n / 4 and idx < 3 * n / 8]
arr10 = [x for (idx, x) in enumerate(arr) if idx >= 3 * n / 8 and idx < n / 2]
arr11 = [x for (idx, x) in enumerate(arr) if idx >= n / 2 and idx < 5 * n / 8]
arr12 = [x for (idx, x) in enumerate(arr) if idx >= 5 * n / 8 and idx < 3 * n / 4]
arr13 = [x for (idx, x) in enumerate(arr) if idx >= 3 * n / 4 and idx < 7 * n / 8]
arr14 = [x for (idx, x) in enumerate(arr) if idx >= 7 * n / 8]
if arr == sorted(arr):
	print(n)
elif arr1 == sorted(arr1) or arr2 == sorted(arr2):
	print(int(n / 2))
elif arr3 == sorted(arr3) or arr4 == sorted(arr4) or arr5 == sorted(arr5) or (arr6 == sorted(arr6)):
	print(int(n / 4))
elif arr7 == sorted(arr7) or arr8 == sorted(arr8) or arr9 == sorted(arr9) or (arr10 == sorted(arr10)) or (arr11 == sorted(arr11)) or (arr12 == sorted(arr12)) or (arr13 == sorted(arr13)) or (arr14 == sorted(arr14)):
	print(int(n / 8))
else:
	print(int(n / 16))


def tanos_sort(item):
	center = len(item) // 2
	if sorted(item) == item:
		return len(item)
	return max(tanos_sort(item[:center]), tanos_sort(item[center:]))
n = int(input())
item = list(map(int, input().split()))
print(tanos_sort(item))


n = int(input())
li = list(map(int, input().strip().split()))
for i in range(len(li)):
	l = len(li)
	temp = sorted(li)
	if temp == li:
		break
	left = li[0:l // 2]
	right = li[l // 2:l]
	left_length = 1
	right_length = 1
	for i in range(len(left) - 1):
		if left[i + 1] >= left[i]:
			left_length += 1
		else:
			break
	for i in range(len(right) - 1):
		if right[i + 1] >= right[i]:
			right_length += 1
		else:
			break
	if left_length > right_length:
		li = li[0:l // 2]
	else:
		li = li[l // 2:l]
print(len(li))


n = int(input())
a = [int(x) for x in input().split(' ')]

def findmax(a):
	if a == sorted(a):
		return len(a)
	else:
		return max(findmax(a[:len(a) // 2]), findmax(a[len(a) // 2:]))
print(findmax(a))


n = int(input())
a = list(map(int, input().split()))

def cal(l, r):
	ok = 1
	for i in range(l + 1, r + 1):
		if a[i] < a[i - 1]:
			ok = 0
			break
	mid = (l + r) // 2
	if ok == 0:
		return max(cal(l, mid), cal(mid + 1, r))
	else:
		return r - l + 1
print(cal(0, n - 1))


def c_sort(i, j):
	c = 1
	for x in range(i, j - 1):
		if Arr[x] <= Arr[x + 1]:
			c += 1
	return c
n = int(input())
Arr = list(map(int, input().split()))
while c_sort(0, len(Arr)) != len(Arr):
	length = len(Arr)
	c1 = c_sort(0, length // 2 - 1)
	c2 = c_sort(length // 2, length)
	if c1 < c2:
		del Arr[:length // 2]
	else:
		del Arr[length // 2:]
print(len(Arr))


n = int(input())
L = [*map(int, input().split())]

def check(l):
	prev = 0
	for x in l:
		if x < prev:
			return False
		prev = x
	return True
ans = 0
leng = 1
while leng <= n:
	for i in range(n // leng):
		if check(L[i * leng:(i + 1) * leng]):
			ans = leng
	leng *= 2
print(ans)


n = int(input())
a = list(map(int, input().split()))

def q(t):
	return t > sorted(t) and q(t[::2]) or t

def m(t):
	if t == sorted(t):
		return len(t)
	else:
		return max(m(t[:len(t) // 2]), m(t[len(t) // 2:]))
print(m(a))


def s(a):
	for i in range(len(a) - 1):
		if a[i] > a[i + 1]:
			return 0
	return 1
n = int(input())
arr = [int(i) for i in input().split()]
ans = 1
for i in range(5):
	t = 2 ** i
	if t > n:
		break
	for k in range(0, n, t):
		if s(arr[k:k + t]):
			ans = t
print(ans)


def divide(a, l, r):
	global ma
	if l < r:
		m = (l + r) // 2
		divide(a, l, m)
		divide(a, m + 1, r)
		p = check(a, l, m, r)
		if p > ma:
			ma = p

def check(a, l, m, r):
	l1 = []
	l2 = []
	n1 = m + 1 - l
	n2 = r - m
	w = -1
	e = -1
	for i in range(0, n1):
		l1.append(a[l + i])
	for j in range(0, n2):
		l2.append(a[m + 1 + j])
	b = sorted(l1)
	if b == l1:
		w = len(b)
	b = sorted(l2)
	if b == l2:
		e = len(b)
	return max(w, e)
ma = 1
n = int(input())
a = [int(i) for i in input().split()][:n]
b = sorted(a)
if a == b:
	print(n)
else:
	divide(a, 0, n - 1)
	print(ma)


n = int(input())
L = [*map(int, input().split())]

def helper(n, L):
	if L == sorted(L):
		return n
	else:
		return max(helper(n // 2, L[:n // 2]), helper(n // 2, L[n // 2:]))
print(helper(n, L))


n = int(input())
array = input().split()
for i in range(len(array)):
	array[i] = int(array[i])
maxNum = 0

def try_sort(direction, newArray):
	global maxNum
	if sorted(newArray) == newArray:
		if maxNum < len(newArray):
			maxNum = len(newArray)
		return
	else:
		partOfLen = int(len(newArray) / 2)
		if direction == 'l':
			newArray = newArray[:partOfLen]
		else:
			newArray = newArray[partOfLen:]
		try_sort('l', newArray)
		try_sort('r', newArray)
try_sort('l', array)
try_sort('r', array)
print(maxNum)


z = int(input())
n = list(map(int, input().split()))
while 1 == 1:
	if n == sorted(n):
		print(len(n))
		break
	else:
		a = n[0:len(n) // 2]
		b = n[len(n) // 2:len(n)]
		s1 = 0
		for i in range(len(a)):
			if a[i - 1] < a[i]:
				s1 = s1 + 1
		s2 = 0
		for i in range(len(a)):
			if b[i - 1] < b[i]:
				s2 = s2 + 1
		if s1 > s2 or s1 == s2:
			n = a
		else:
			n = b


from functools import reduce
input()
l = [int(x) for x in input().strip().split()]
cnt = 0

def is_sorted(x):
	for (idx, e) in enumerate(x):
		try:
			if x[idx] > x[idx + 1]:
				return False
		except:
			return True

def splinter(x):
	l = []
	for y in x:
		half = len(y) // 2
		l += [y[:half], y[half:]]
	return l
l = [l]
while not any(map(is_sorted, l)):
	l = splinter(l)
print(len(l[0]))


def solve():
	n = int(input())
	A = [int(k) for k in input().split()]
	if A == sorted(A):
		print(n)
		return
	parts = 2
	k = n // parts
	while k > 1:
		s = 0
		for i in range(0, n, n // parts):
			if A[i:i + n // parts] == sorted(A[i:i + n // parts]):
				print(k)
				return
		parts *= 2
		k = n // parts
	print(1)
solve()


def chunks(u, v):
	q = []
	for i in u:
		for j in range(0, len(v), i):
			q.append(v[j:j + i])
	return q
n = int(input())
a = list(map(int, input().split()))
mylist = []
if a == sorted(a):
	print(len(a))
else:
	x = 2
	s = []
	k = 0
	while len(a) // x > 1:
		s.append(x)
		k += 1
		x *= 2
	for p in chunks(s, a):
		if p == sorted(p):
			mylist.append(p)
	if len(mylist) == 0:
		print(1)
	else:
		print(len(max(mylist, key=len)))


def f(s, n):
	if sorted(s) == s:
		return n
	return max(f(s[:n // 2], n // 2), f(s[n // 2:], n // 2))
n = int(input())
s = [int(i) for i in input().split()]
print(f(s, n))


n = int(input())
a = str(input())
vals = [int(x) for x in a.split()]

def foo(vals):
	n = len(vals)
	if n == 1:
		return 1
	if sorted(vals) == vals:
		return n
	left_part = vals[:int(n / 2)]
	right_part = vals[int(n / 2):]
	return max(foo(left_part), foo(right_part))
print(foo(vals))


int(input())
l = list(map(int, input().split()))
ans = []

def is_sorted(a):
	for i in range(len(a) - 1):
		if a[i] > a[i + 1]:
			return False
	return True

def sort(a):
	if is_sorted(a):
		ans.append(len(a))
		return
	else:
		mid = int(len(a) / 2)
		sort(a[0:mid])
		sort(a[mid:len(a)])
sort(l)
print(max(ans))


size = int(input())
num_list = list(map(int, input().split()))

def check(num_list):
	l = len(num_list) // 2
	if list(sorted(num_list)) == num_list:
		return l * 2
	else:
		return max(check(num_list[:l]), check(num_list[l:]))
print(max(1, check(num_list)))


n = int(input())
a = [int(x) for x in input().strip().split()]
(ans, k) = (1, 2)
while k <= n:
	i = 0
	while i < n:
		flag = True
		for j in range(k - 1):
			if a[i + j] > a[i + j + 1]:
				flag = False
				break
		if flag:
			ans = k
		i += k
	k = k * 2
print(ans)


n = int(input())
num = [int(i) for i in input().split()]

def subseq(x):
	revsortnum = x.copy()
	sortnum = x.copy()
	sortnum.sort()
	revsortnum.sort(reverse=True)
	flag = False
	flag1 = False
	for i in range(n):
		if sortnum[i] != num[i]:
			flag = True
		if revsortnum[i] != num[i]:
			flag1 = True
	if flag == False:
		return len(x)
	elif flag1 == False:
		return 1
	else:
		length = 1
		max = 1
		for i in range(len(x) - 1):
			if x[i + 1] >= x[i]:
				length += 1
			else:
				length = 1
			if length > max:
				max = length
		return max
if subseq(num) == len(num):
	print(n)
elif subseq(num) == 1:
	print(1)
else:
	while n >= 2:
		num_ = num[:n // 2]
		_num = num[n // 2:]
		n = n // 2
		m_ = subseq(num_)
		_m = subseq(_num)
		if m_ == n or _m == n:
			print(n)
			break
		elif m_ > _m:
			num = num_
		else:
			num = _num


def is_list_sorted(num_list):
	if sorted(num_list) == num_list:
		return len(num_list)
	k = len(num_list) // 2
	return max(is_list_sorted(num_list[:k]), is_list_sorted(num_list[k:]))
n = int(input())
a = list(map(int, input().split()))
print(is_list_sorted(a))


def p(l):
	n = len(l)
	max = 1
	m = 1
	for j in range(1, n):
		if l[j] >= l[j - 1]:
			max += 1
		else:
			if max > m:
				m = max
			max = 1
	if max > m:
		m = max
	return m

def f(m):
	if p(m) == len(m):
		print(len(m))
		return True
	else:
		return False

def new_sp_right(pol):
	right = pol[0:round(len(pol) / 2)]
	return right

def new_sp_left(pol):
	left = pol[round(len(pol) / 2):]
	return left
n = int(input())
l = list(map(int, input().split()))
spisok = l
while f(spisok) == False:
	sp1 = new_sp_right(spisok)
	sp2 = new_sp_left(spisok)
	spisok = sp1 if p(sp1) == max(p(sp1), p(sp2)) else sp2


def sortcheck(array, start, end):
	for i in range(start + 1, end):
		if array[i] < array[i - 1]:
			return False
	return True
max = 1

def foo(array, start, end, n):
	global max
	if not sortcheck(array, start, end):
		mid = (start + end) // 2
		foo(array, start, mid, n // 2)
		foo(array, mid, end, n // 2)
	elif n > max:
		max = n
size = int(input())
array = [int(a) for a in input().split()]
foo(array, 0, size, size)
print(max)


def thanosSort(arr):
	oldArr = arr.copy()
	arr.sort()
	if arr == oldArr:
		return len(arr)
	else:
		halfSize = len(oldArr) // 2
		leftArr = oldArr[:halfSize]
		rightArr = oldArr[halfSize:]
		return max(thanosSort(leftArr), thanosSort(rightArr))
n = input()
l = list(map(int, input().split()))
x = thanosSort(l)
print(x)


def thanos_sort(list, index1, index2):
	if index2 == index1:
		return 1
	mean = (index1 + index2) // 2
	first = thanos_sort(list, index1, mean)
	second = thanos_sort(list, mean + 1, index2)
	half_difference = (index2 - index1 + 1) // 2
	if first == half_difference and second == half_difference:
		if list[mean] <= list[mean + 1]:
			return index2 - index1 + 1
		else:
			return half_difference
	if first > second:
		return first
	else:
		return second
length = int(input())
list_of_numbers = list(map(int, input().split()))
number = thanos_sort(list_of_numbers, 0, length - 1)
print(number)


N = int(input())
array = [int(i) for i in input().split()]
size = 2
foundany = False
while size <= N:
	for i in range(0, N, size):
		if array[i:i + size] == sorted(array[i:i + size]):
			foundany = True
			break
	if not foundany:
		break
	foundany = False
	size *= 2
print(size // 2)


def ali(k):
	l = len(k)
	b = sorted(k)
	global lol, ln, arr
	if l > ln and k == b:
		ln = l
		arr = k
		return
	if l == 1:
		return
	ali(k[0:int(l / 2)])
	ali(k[int(l / 2):l])
n = input()
k = list(map(int, input().split()))
lol = 1
arr = []
ln = 0
ali(k)
print(len(arr))


a = input()
tt = input()
a = [int(x) for x in tt.split()]

def t(s):
	if len(s) == 1:
		return 1
	f = True
	for i in range(len(s) - 1):
		f = f and s[i] <= s[i + 1]
	if f:
		return len(s)
	else:
		m = 1
		t1 = t(s[:len(s) // 2])
		t2 = t(s[len(s) // 2:])
		if t1 > m:
			m = t1
		if t2 > m:
			m = t2
		return m
print(t(a))


def processArray(arr):
	val = checkSort(arr)
	return val

def checkSort(arr):
	if arr == sorted(arr):
		return len(arr)
	else:
		n = len(arr) // 2
		val1 = processArray(arr[:n])
		val2 = processArray(arr[n:])
		return max(val1, val2)
n = int(input())
arr = list(map(int, input().split(' ')))
ans = checkSort(arr)
print(ans)


def isOrdered(arr):
	for i in range(len(arr) - 1):
		if arr[i] > arr[i + 1]:
			return False
	return True

def solve(arr):
	if isOrdered(arr):
		return len(arr)
	a = solve(arr[:len(arr) // 2])
	b = solve(arr[len(arr) // 2:])
	if a > b:
		return a
	return b
l = int(input())
arr = [int(a) for a in input().split()]
print(solve(arr))


input()
a = [*map(int, input().split())]
ans = 1
x = 2
while x <= len(a):
	i = 0
	q = False
	while i < len(a) - 1:
		if a[i:i + x] == sorted(a[i:i + x]):
			q = True
			break
		i += x
	if q:
		ans = x
	x *= 2
print(ans)


m = int(input())
a = list(map(int, input().split()))

def get(a):
	l = len(a) // 2
	if list(sorted(a)) == a:
		return l * 2
	else:
		return max(get(a[:l]), get(a[l:]))
print(max(1, get(a)))


ct = 0

def func(l1, ct):
	ct += 1
	if l1 == sorted(l1):
		return len(l1)
	else:
		return max(func(l1[0:int(len(l1) / 2)], ct), func(l1[int(len(l1) / 2):len(l1)], ct))
n = int(input())
l1 = list(map(int, input().split()))
print(func(l1, ct))


N = int(input())
A = list(map(int, input().split()))

def longest(A):
	if A == sorted(A):
		return len(A)
	return max(longest(A[:len(A) // 2]), longest(A[len(A) // 2:]))
print(longest(A))


def isIncreasing(myList):
	for i in range(len(myList)):
		for j in range(i, len(myList)):
			if myList[i] > myList[j]:
				return 0
	return 1

def thanosSort(myList, newList):
	if isIncreasing(myList) or len(myList) == 1:
		newList.append(len(myList))
	else:
		rightListStart = len(myList) // 2
		leftList = myList[:rightListStart]
		rightList = myList[rightListStart:]
		thanosSort(leftList, newList)
		thanosSort(rightList, newList)

def findMax(myList):
	max = myList[0]
	for num in myList:
		if max < num:
			max = num
	return max
myList = []
num = int(input())
lenOfAcsList = []
myList = list(map(int, input().split()))
thanosSort(myList, lenOfAcsList)
res = findMax(lenOfAcsList)
print(res)


def isSorted(arr):
	for i in range(len(arr) - 1):
		if arr[i + 1] < arr[i]:
			return False
	return True

def main():
	n = int(input())
	array = list(map(int, input().split()))
	arr = []
	max_len = 1
	if n == 1:
		print(1)
		return
	for i in range(0, n, 2):
		x = [array[i], array[i + 1]]
		arr.append(x)
		if isSorted(x):
			max_len = max(max_len, len(x))
	while len(arr) != 1:
		new = []
		for i in range(0, len(arr), 2):
			x = arr[i]
			y = arr[i + 1]
			x.extend(y)
			new.append(x)
			if isSorted(x):
				max_len = len(x)
		arr = new[:]
	print(max_len)
main()


N = int(input())
data = input().split(' ')
for i in range(N):
	data[i] = int(data[i])

def sort(x):
	(cnt1, cnt2) = (1, 1)
	(split1, split2) = (x[:len(x) // 2], x[len(x) // 2:])
	for i in range(len(x) // 2):
		if i != 0 and split1[i] > split1[i - 1]:
			cnt1 += 1
		if i != 0 and split2[i] > split2[i - 1]:
			cnt2 += 1
	return cnt1 > cnt2
while len(data) >= 1:
	if data == sorted(data):
		print(len(data))
		break
	elif sort(data):
		data = data[:len(data) // 2]
	else:
		data = data[len(data) // 2:]


from math import *
from copy import *
from string import *
from random import *
from bisect import *
from sys import stdin
from sys import maxsize
from operator import *
from itertools import *
from collections import Counter
from collections import defaultdict

def solve(l):
	n = len(l)
	(a, b) = (0, 0)
	if n < 2:
		return n
	elif l == sorted(l):
		return n
	else:
		a += solve(l[:ceil(n / 2)])
		b += solve(l[ceil(n / 2):])
		return max(a, b)
N = int(stdin.readline())
l = list(map(int, stdin.readline().rstrip().split()))
ans = solve(l)
print(ans)


from typing import List, Tuple
arr_len = input()
arr = input()
arr_len = int(arr_len)
arr = [int(s) for s in arr.split(' ')]
OVERALL = 1

def thanos_sort(arr: List[int], length: int) -> Tuple[List[int], bool, int]:
	global OVERALL
	if length == 1:
		return (arr, True, 1)
	half_len = length // 2
	(left_arr, left_status, MAX_VALID_LENGTH) = thanos_sort(arr[:half_len], half_len)
	(right_arr, right_status, MAX_VALID_LENGTH) = thanos_sort(arr[half_len:], half_len)
	if left_status and right_status:
		if left_arr[-1] <= right_arr[0]:
			OVERALL = max(OVERALL, 2 * MAX_VALID_LENGTH)
			return (arr, True, 2 * MAX_VALID_LENGTH)
	return (arr, False, MAX_VALID_LENGTH)
thanos_sort(arr, arr_len)
print(OVERALL)


n = int(input())
l = list(map(int, input().split()))
ca = []

def fun(l, left, right):
	f = True
	for i in range(left, right - 1):
		if l[i] <= l[i + 1]:
			f = True
		else:
			f = False
			break
	mid = (left + right) // 2
	if f == True:
		return right - left
	else:
		return max(fun(l, left, mid), fun(l, mid, right))
print(fun(l, 0, n))


(lambda N, n, t: (lambda f: print(f(n, f)))(lambda n, f: len(n) if t(n) else max(f(n[:len(n) >> 1], f), f(n[len(n) >> 1:], f))))(int(input()), list(map(int, input().split())), lambda n: all((n[i - 1] <= n[i] for i in range(1, len(n)))))


def isSorted(l):
	i = 1
	while i < len(l):
		if l[i] < l[i - 1]:
			return False
		i += 1
	return True

def thanosSort(l):
	if isSorted(l):
		return len(l)
	n = len(l)
	if n == 1:
		return 1
	mid = n // 2
	return max(thanosSort(l[0:mid]), thanosSort(l[mid:]))
n = int(input())
arr = list(map(int, input().split()))
print(thanosSort(arr))


def tso(a):
	if list(sorted(a)) == a:
		return len(a)
	h = len(a) // 2
	return max(tso(a[:h]), tso(a[h:]))
input()
print(tso([int(x) for x in input().split()]))


def is_sorted(a):
	for i in range(len(a) - 1):
		if a[i] > a[i + 1]:
			return False
	return True
n = int(input())
a = list(map(int, input().split()))

def recur(a):
	if len(a) == 1:
		return 1
	elif is_sorted(a):
		return len(a)
	else:
		return max(recur(a[0:len(a) // 2]), recur(a[len(a) // 2:]))
print(recur(a))


def thanos_sort(array):
	n = len(array)
	if array == sorted(array):
		return n
	else:
		return max(thanos_sort(array[:n // 2]), thanos_sort(array[n // 2:]))
n = int(input())
array = [int(i) for i in input().split()]
print(thanos_sort(array))


def divide_chunks(l1, n):
	for i in range(0, len(l1), n):
		yield l1[i:i + n]

def partition(my_list):
	nu = len(my_list) // 2
	c2 = -22
	c1 = 1
	c3 = 1
	c4 = -24
	y = list(divide_chunks(my_list, nu))
	for i in range(len(y[0]) - 1):
		if y[0][i] <= y[0][i + 1]:
			c1 = c1 + 1
			c2 = max(c1, c2)
		else:
			c2 = max(c1, c2)
			c1 = 1
	for i in range(len(y[1]) - 1):
		if y[1][i] <= y[1][i + 1]:
			c3 = c3 + 1
			c4 = max(c3, c4)
		else:
			c4 = max(c3, c4)
			c3 = 1
	if c2 > c4:
		if y[0] == sorted(y[0]):
			return len(y[0])
		else:
			return partition(y[0])
	elif y[1] == sorted(y[1]):
		return len(y[1])
	else:
		return partition(y[1])
n = int(input())
l = list(map(int, input().split()))
if l == sorted(l):
	print(len(l))
else:
	x = partition(l)
	print(x)


n = int(input())
arr = list(map(int, input().split()))
arr1 = []
arr2 = []

def check(arr):
	if arr == sorted(arr):
		return len(arr)
	if arr != sorted(arr):
		arr1 = arr[:len(arr) // 2]
		arr2 = arr[len(arr) // 2:]
		max1 = check(arr1)
		max2 = check(arr2)
		if max1 > max2:
			return max1
		else:
			return max2
print(check(arr))


n = int(input())
arr = [int(x) for x in input().split(' ')]
i = n
running = True
while i >= 0 and running:
	j = 0
	while j < n:
		if sorted(arr[j:j + i]) == arr[j:j + i]:
			print(i)
			running = False
			break
		j += i
	i //= 2


import math
n = int(input())
s = input().split()
for i in range(n):
	s[i] = int(s[i])
p = n
while p > 0:
	if p == 1:
		print(1)
		break
	F = False
	for i in range(n // p):
		flag = True
		for j in range(p - 1):
			if s[i * p + j] > s[i * p + j + 1]:
				flag = False
				break
		if flag:
			print(p)
			F = True
			break
	if F:
		break
	p //= 2


def is_sorted(arr):
	for i in range(len(arr)):
		if i == 0:
			continue
		if arr[i] < arr[i - 1]:
			return False
	return True

def LenThanosSorted(arr):
	if is_sorted(arr):
		return len(arr)
	else:
		return max(LenThanosSorted(arr[0:len(arr) // 2]), LenThanosSorted(arr[len(arr) // 2:]))
input()
numbers = [int(x) for x in input().split(' ')]
print(LenThanosSorted(numbers))


def thanosSortLargest(l):
	L = len(l)
	if L == 1:
		return (1, l[0], l[0])
	(LSize, LMin, LMax) = thanosSortLargest(l[:L // 2])
	(RSize, RMin, RMax) = thanosSortLargest(l[L // 2:])
	if LSize == L // 2 and RSize == L // 2 and (LMax <= RMin):
		return (L, LMin, RMax)
	else:
		return (max(LSize, RSize), -1, -1)
s = int(input())
li = list(map(int, input().split(' ')))
(a, _, _) = thanosSortLargest(li)
print(a)


n = int(input())
l = input()
l = l.split(' ')
for i in range(0, n, +1):
	l[i] = int(l[i])

def thanos(l):
	if sorted(l) == l:
		return len(l)
	k = len(l) // 2
	return max(thanos(l[:k]), thanos(l[k:]))
print(thanos(l))


def lcheck(a):
	if a == sorted(a):
		return len(a)
	else:
		new_a = a[:len(a) // 2]
		if len(new_a) > 1:
			if lcheck(new_a) >= rcheck(new_a):
				return lcheck(new_a)
			else:
				return rcheck(new_a)
		else:
			return 1

def rcheck(a):
	if a == sorted(a):
		return len(a)
	else:
		new_a = a[len(a) // 2:]
		if len(new_a) > 1:
			if lcheck(new_a) >= rcheck(new_a):
				return lcheck(new_a)
			else:
				return rcheck(new_a)
		else:
			return 1
n = int(input())
a = list(map(int, input().split()))
if lcheck(a) >= rcheck(a):
	print(lcheck(a))
else:
	print(rcheck(a))


def recursive(elements, count):
	if len(elements) == 1:
		return 1
	elif len(elements) == 0:
		return 0
	else:
		minimum = elements[0]
		left = len(elements)
		right = len(elements)
		for i in range(1, len(elements)):
			if minimum > elements[i]:
				half = len(elements) // 2
				left = recursive(elements[0:half], half)
				right = recursive(elements[half:len(elements)], half)
			else:
				minimum = elements[i]
		return max(left, right)
jumlah_elemen = int(input())
kedua = input()
elements = [int(i) for i in kedua.split(' ')]
print(recursive(elements, len(elements)))


def thanos(k):
	if k == sorted(k):
		return len(k)
	else:
		return max(thanos(k[:len(k) // 2]), thanos(k[len(k) // 2:]))
t = int(input())
inp = [int(x) for x in input().split(' ', t)]
print(thanos(inp))


from math import log
n = int(input())
a = [int(i) for i in input().split(' ')]
for i in range(int(log(n, 2))):
	m = len(a) // 2
	for j in range(m):
		if a[j] > a[j + 1]:
			a = a[m:]
			m = len(a) // 2
			break
		elif a[m + j - 1] > a[m + j]:
			a = a[:m]
			m = len(a) // 2
			break
print(len(a))


def sorted_depth(arr):
	l = len(arr)
	if arr == sorted(arr):
		return 0
	h = l // 2
	return 1 + min(sorted_depth(arr[:h]), sorted_depth(arr[h:]))
n = int(input())
arr = list(map(int, input().strip().split()))
min_depth = sorted_depth(arr)
print(n // 2 ** min_depth)


def sortCheck(n):
	l = len(n)
	if l == 1:
		sortedmax.append(1)
	else:
		temp = n.copy()
		temp.sort()
		if temp == n:
			sortedmax.append(l)
		else:
			temp = n[0:int(l / 2)]
			n = n[int(l / 2):l]
			sortCheck(temp)
			sortCheck(n)
num = int(input())
array1 = list(map(int, input().split()))
sortedmax = []
sortCheck(array1)
sortedmax.sort()
print(sortedmax[-1])


def firstHalf(snapLength, array):
	del array[0:snapLength]
	return array

def secondHalf(snapLength, array):
	del array[snapLength:len(array)]
	return array

def thanos(array):
	snapLength = int(len(array) / 2)
	while not sorted(array):
		array1 = array.copy()
		array2 = array.copy()
		a = firstHalf(snapLength, array1)
		b = secondHalf(snapLength, array2)
		len_a = thanos(a)
		len_b = thanos(b)
		if len_a > len_b:
			return len_a
		else:
			return len_b
	return len(array)

def sorted(array):
	for x in range(len(array) - 1):
		if array[x] > array[x + 1]:
			return False
	return True
lenArray = int(input())
array = list(map(int, input().split()))
print(thanos(array))


def count_items_sorted(arr, size):
	flag = 0
	for i in range(size - 1):
		if arr[i] <= arr[i + 1]:
			flag += 1
	return flag

def thanos_sort(arr, size):
	size_half = size
	while arr != sorted(arr):
		size_half = size = int(size / 2)
		slide_lefth = arr[0:size_half]
		slide_rigth = arr[size_half:]
		if count_items_sorted(slide_lefth, size_half) >= count_items_sorted(slide_rigth, size_half):
			arr = slide_lefth[:]
		else:
			arr = slide_rigth[:]
	return size_half
size = int(input())
items = list(map(int, input().split()))
print(thanos_sort(items, size))


a = int(input())
A = list(map(int, input().split()))
A = [A]
B = []
k = False
t = 0
while k == False:
	for i in range(len(A)):
		n = A[i][:]
		n.sort()
		if A[i] == n:
			k = True
			t = i
		else:
			B.append(A[i][:len(A[i]) // 2])
			B.append(A[i][len(A[i]) // 2:])
	if k == False:
		A = B[:]
print(len(A[t]))


import sys
sys.stdin.readline()
arraystring = sys.stdin.readline()
array = [int(x) for x in arraystring.split()]

def tsort(array):
	length = len(array)
	if sorted(array) == array:
		return length
	else:
		return max(tsort(array[:-(length // 2)]), tsort(array[length // 2:]))
print(tsort(array))


n = int(input())
a = list(map(int, input().split()))

def thanos_sort(a):
	if sorted(a) != a:
		x = thanos_sort(a[:len(a) // 2])
		y = thanos_sort(a[len(a) // 2:])
		if len(x) > len(y):
			return x
		else:
			return y
	else:
		return a
print(len(thanos_sort(a)))


n = int(input())
l = list(map(int, input().split()))

def issorted(l):
	if l == sorted(l):
		return len(l)
	else:
		return max(issorted(l[0:len(l) // 2]), issorted(l[len(l) // 2:]))
print(issorted(l))


n = int(input())
array = list(map(int, input().split(' ')))

def sort(array):
	s = 1
	for i in range(len(array) - 1):
		if array[i] <= array[i + 1]:
			s += 1
	if len(array) == s:
		return True
	else:
		return False

def check_sort(array, n):
	max1 = 0
	max2 = 0
	if sort(array):
		return len(array)
	else:
		max1 = check_sort(array[:int(n / 2)], n / 2)
		max2 = check_sort(array[int(n / 2):], n / 2)
	m = max(max1, max2)
	return m
print(check_sort(array, n))


import sys
input()
nums = list(map(int, input().split()))
count = 0
possible_lists = [nums]
next_possible_lists = []

def check_sorted(nums):
	return type(nums) == list and nums == sorted(nums)
while True:
	for p in possible_lists:
		if check_sorted(p):
			print(len(p))
			sys.exit()
		next_possible_lists.append(p[:len(p) // 2])
		next_possible_lists.append(p[len(p) // 2:])
	possible_lists = next_possible_lists.copy()
print(1)


n = int(input())
a = list(map(int, input().split()))
t = 0

def rr(l, r):
	global a, t
	if list(sorted(a[l:r + 1])) == a[l:r + 1]:
		t = max(t, r - l + 1)
	if r != l:
		x = (l + r) // 2
		rr(l, x)
		rr(x + 1, r)
rr(0, n - 1)
print(t)


import sys

def is_sorted(a):
	for i in range(1, len(a)):
		if a[i - 1] > a[i]:
			return False
	return True

def sort_len(A):
	L = len(A)
	if is_sorted(A):
		return L
	else:
		return max(sort_len(A[:L // 2]), sort_len(A[L // 2:]))
T = int(sys.stdin.readline())
A = [int(i) for i in sys.stdin.readline().split()]
print(sort_len(A))


n = int(input())
s = list(map(int, input().split()))
while s != sorted(s):
	maxfsort = 0
	maxssort = 0
	for j in range(len(s[:int(len(s) / 2)])):
		for i in range(len(s[:int(len(s) / 2)])):
			if len(s[:int(len(s) / 2)][j:i + 1]) != 0:
				if s[:int(len(s) / 2)][j:i + 1] == sorted(s[:int(len(s) / 2)][j:i + 1]) and len(s[:int(len(s) / 2)][j:i + 1]) > maxfsort:
					maxfsort = len(s[:int(len(s) / 2)][j:i + 1])
		for i in range(len(s[int(len(s) / 2):])):
			if len(s[int(len(s) / 2):][j:i + 1]) != 0:
				if s[int(len(s) / 2):][j:i + 1] == sorted(s[int(len(s) / 2):][j:i + 1]) and len(s[int(len(s) / 2):][j:i + 1]) > maxfsort:
					maxssort = len(s[int(len(s) / 2):][j:i + 1])
	if maxfsort > maxssort:
		s = s[:int(len(s) / 2)]
	else:
		s = s[int(len(s) / 2):]
print(len(s))


class Tanos:

	def __init__(self):
		self.prev = None

	def check(self, part):
		for p in part:
			if self.prev:
				if self.prev > p:
					self.prev = p
					return False
			self.prev = p
		return True

	def get_left_part(self, part):
		return part[:len(part) // 2]

	def get_right_part(self, part):
		return part[len(part) // 2:]

	def tanos_two(self, part):
		left_part = self.get_left_part(part)
		right_part = self.get_right_part(part)
		if not self.check(left_part):
			self.prev = None
			return self.tanos_two(right_part)
		if not self.check(right_part):
			self.prev = None
			return self.tanos_two(left_part)
		return part
from sys import stdin, stdout
n = stdin.readline()
arr = [int(x) for x in stdin.readline().split()]
stdout.write(str(len(Tanos().tanos_two(arr))))


def read_input():
	input_str = str(input())
	return map(int, input_str.split(' '))

def is_sorted(lst: list) -> bool:
	if len(lst) == 0:
		return True
	last = lst[0]
	for i in lst:
		if i < last:
			return False
		last = i
	return True

def get_min_length(lst: list) -> int:
	if is_sorted(lst):
		return len(lst)
	lst_len = len(lst)
	return max(get_min_length(lst[:int(lst_len / 2)]), get_min_length(lst[int(lst_len / 2):]))
n = int(input())
arr = list(read_input())
result = get_min_length(arr)
print(result)


def thanos(arr, n):
	if sorted(arr) == arr:
		return n
	elif n == 1:
		return 1
	else:
		num = int(n / 2)
		return max(thanos(arr[:num], num), thanos(arr[num:], num))

def solve():
	n = int(input())
	arr = [int(x) for x in input().split()]
	print(thanos(arr, n))
solve()


import sys

def solve(n, arr):
	if n <= 1:
		return n
	else:
		for i in range(1, n):
			if arr[i] < arr[i - 1]:
				size = n // 2
				right = solve(size, arr[:size + 1])
				left = solve(size, arr[size:])
				return max(right, left)
		return n
n = int(sys.stdin.readline())
arr = list(map(int, sys.stdin.readline().strip().split()))
sys.stdout.write(str(solve(n, arr)))


def check(arr, n):
	i = 1
	while i < n and arr[i] >= arr[i - 1]:
		i += 1
	if i == n:
		return True
	return False
n = int(input())
a = [int(i) for i in input().split()]
b = False
k = 1
while k < n:
	for i in range(k):
		if check(a[i * (n // k):(i + 1) * (n // k)], n // k):
			b = True
			print(n // k)
			break
	if b:
		break
	k *= 2
if k == n:
	print(1)


n = int(input())
a = []
while len(a) < n:
	a.extend(list(map(int, input().split(' '))))

def sorted(begin, end):
	for i in range(begin + 1, end):
		if a[i] < a[i - 1]:
			return False
	return True

def solve(begin, end):
	if not sorted(begin, end):
		left = 1
		right = 1
		mid = int((end + begin) / 2)
		if mid - begin > 1:
			left = solve(begin, mid)
		if end - mid > 1:
			right = solve(mid, end)
		return max(left, right)
	else:
		return end - begin
print(solve(0, n))


def no_of_sort(arr):
	maxs = 0
	n = len(arr)
	for i in range(n):
		k = 1
		for j in range(i, n - 1):
			if arr[j + 1] >= arr[j]:
				k += 1
		if maxs < k:
			maxs = k
	return maxs

def who_better(arr1, arr2):
	if no_of_sort(arr1) > no_of_sort(arr2):
		return arr1
	else:
		return arr2

def shelk(arr, n):
	arr1 = arr[:n // 2]
	arr2 = arr[n // 2:]
	arrf = who_better(arr1, arr2)
	if no_of_sort(arrf) == n // 2:
		return arrf
	else:
		return shelk(arrf, n // 2)
n = int(input())
arr = input().split()
arr = list(map(int, arr))
if no_of_sort(arr) != n:
	arr = shelk(arr, n)
print(len(arr))


def check(ls, n):
	res = True
	j = ls[0]
	for i in ls:
		res = j <= i and res
		j = i
	return res

def fsort(ls):
	n = len(ls)
	if n > 0:
		if check(ls, n):
			return n
		else:
			return max(fsort(ls[int(n / 2):]), fsort(ls[:int(n / 2)]))
	else:
		return 0
n = input()
ls = list(map(int, input().split()))
print(fsort(ls))


n = int(input())
l = list(map(int, input().split()))
temp = l.copy()
ans = 1
i = 0
k = 1
while i <= len(l):
	i = 2 ** k
	for j in range(i, len(l) + 1, i):
		if l[j - i:j] == sorted(l[j - i:j]):
			ans = i
			break
	k += 1
print(ans)


n = int(input())
L = [int(x) for x in input().split()]

def thanosSort(n, L):
	if L == sorted(L):
		return len(L)
	else:
		m = n / 2
		return max(thanosSort(n / 2, L[0:int(m)]), thanosSort(n / 2, L[int(m):]))
print(thanosSort(n, L))


def count_sorted(x):
	j = 0
	cont = 0
	maior = 0
	for i in x:
		if i >= j:
			cont += 1
		elif cont > maior:
			maior = cont
			cont = 0
		j = i
	if cont > maior:
		maior = cont
	return maior
n = input()
a = list(map(int, input().split()))
while a != sorted(a):
	if count_sorted(a[:int(len(a) / 2)]) > count_sorted(a[int(len(a) / 2):]):
		a = a[:int(len(a) / 2)]
	else:
		a = a[int(len(a) / 2):]
print(len(a))


def is_sorted(array):
	for i in range(len(array) - 1):
		if array[i] > array[i + 1]:
			return False
	return True

def biggest_sorted(array):
	if is_sorted(array):
		return len(array)
	else:
		return max(biggest_sorted(array[:len(array) // 2]), biggest_sorted(array[len(array) // 2:]))
n = int(input())
numbers = list(map(int, input().split()))
print(biggest_sorted(numbers))


if False:
	with open('../test.txt', mode='w') as f:
		f.write(GetTestData(td_num))
	with open('../test.txt') as f:
		n = int(f.readline())
		a = [int(x) for x in f.readline().split()]
else:
	for i in range(1):
		n = int(input())
		a = [int(x) for x in input().split()]
import math
m = int(math.log(n, 2))
ans = 1
for i in range(m + 1):
	for j in range(int(2 ** (m - i))):
		if a[j * 2 ** i:(j + 1) * 2 ** i] == sorted(a[j * 2 ** i:(j + 1) * 2 ** i]):
			ans = 2 ** i
print(ans)


def is_sorted(xs):
	return sorted(xs) == xs

def main():
	n = int(input())
	a = list(map(int, input().split()))
	while n > 0:
		cnt = len(a) // n
		for i in range(cnt):
			if is_sorted(a[i * n:(i + 1) * n]):
				print(n)
				return
		n //= 2
main()


input()

def recursive(a):
	n = len(a)
	return n if all((a[i] <= a[i + 1] for i in range(n - 1))) else max(recursive(a[:n // 2]), recursive(a[n // 2:]))
print(recursive(list(map(int, input().split()))))


n = int(input())
a = [int(i) for i in input().split()]
n1 = n

def isSort(i, j):
	for t in range(i + 1, j):
		if a[t] < a[t - 1]:
			return False
	return True
while n1 - 1:
	k = int(n / n1)
	for i in range(0, k):
		ind = i * n1
		if isSort(ind, ind + n1):
			print(n1)
			quit()
	n1 = int(n1 / 2)
print(1)


nn = int(input())
a = list(map(str, input().split()))

def issorted(arr):
	flag = 0
	for i in range(len(arr) - 1):
		if arr[i] <= arr[i + 1]:
			pass
		else:
			flag = 1
	if flag == 0:
		return 0
	else:
		return 1
n = nn // 2
tot = nn
all_arr = []
size = []
while n > 1:
	c = tot // n
	init = 0
	ini = n
	for i in range(c):
		x = ''.join(a)
		xy = list(map(int, a[init:ini]))
		all_arr.append(xy)
		init = init + n
		ini = ini + n
	n = n // 2
a = list(map(int, a))
all_arr.append(a)
for i in all_arr:
	if issorted(i) == 0:
		size.append(len(i))
	else:
		pass
if len(size) == 0:
	print(1)
else:
	print(max(size))


m = int(input())
a = [int(s) for s in input().split()]
n = 0

def tanos(n, m):
	isInc = True
	for i in range(n, m - 1):
		if a[i] > a[i + 1]:
			isInc = False
			break
	if isInc == True:
		return m - n
	elif m - n == 2:
		return 1
	else:
		return max(tanos(n, int(n + (m - n) / 2)), tanos(int(n + (m - n) / 2), m))
print(tanos(0, m))


def check(ar: list):
	ok = True
	for i in range(1, len(ar)):
		if ar[i] < ar[i - 1]:
			ok = False
			break
	if ok:
		return len(ar)
	else:
		return max(check(ar[:len(ar) // 2]), check(ar[len(ar) // 2:]))
n = int(input())
a = list(map(int, input().split()))
print(check(a))


def s(x, y):
	if sorted(y) == y:
		return x
	else:
		return max(s(x // 2, y[:x // 2]), s(x // 2, y[x // 2:]))
print(s(int(input()), [int(i) for i in input().split()]))


def calc(a):
	if a == sorted(a):
		return len(a)
	l = a[:len(a) // 2]
	r = a[len(a) // 2:]
	return max(calc(l), calc(r))
n = int(input())
a = list(map(int, input().split()))
print(calc(a))


n = int(input())
a = list(map(int, input().split()))

def check(x):
	if x != sorted(x):
		return max(check(x[:len(x) // 2]), check(x[len(x) // 2:]))
	return len(x)
print(check(a))


from typing import List

def thanos_sort(list: List[int], start: int, end: int) -> int:
	if start == end:
		return 1
	elif start > end:
		return 0
	mid = (start + end) // 2
	max_left = thanos_sort(list, start, mid)
	max_right = thanos_sort(list, mid + 1, end)
	if max_left + max_right == end - start + 1:
		if check_sorted(list, start, mid, end):
			return max_left + max_right
	return max(max_left, max_right)

def check_sorted(list, start, mid, end):
	return list[mid] <= list[mid + 1]
n = int(input())
list = [int(x) for x in input().split()]
print(thanos_sort(list, 0, len(list) - 1))


n = int(input())
a = list(map(int, input().split()))

def f(x):
	y = x[:]
	y.sort()
	if x == y:
		return len(x)
	return max(f(x[len(x) // 2:]), f(x[:len(x) // 2]))
print(f(a))


n = int(input(''))
numbers = list(map(int, input('').split(' ')))

def check_sorted(numbers):
	if len(numbers) == 1:
		return True
	else:
		value = numbers[0]
		for i in range(1, len(numbers)):
			if value <= numbers[i]:
				value = numbers[i]
			else:
				return False
	return True

def thanos_sort(numbers):
	if check_sorted(numbers):
		return len(numbers)
	else:
		mid = len(numbers) // 2
		return max(thanos_sort(numbers[:mid]), thanos_sort(numbers[mid:]))
print(thanos_sort(numbers))


import re, math, decimal, bisect

def read():
	return input().strip()

def iread():
	return int(input().strip())

def viread():
	return [int(_) for _ in input().strip().split()]

def round(n):
	return int(n + 0.5)

def issorted(arr):
	last = None
	for i in arr:
		if not last:
			last = i
		elif last > i:
			return False
		last = i
	return True
n = iread()
arr = viread()
N = n
while n != 1:
	for i in range(0, N, n):
		if issorted(arr[i:i + n]):
			print(n)
			exit()
	n >>= 1
print(n)


n = int(input())
a = list(map(int, input().split()))
while n > 1:
	for i in range(0, len(a), n):
		part = a[i:i + n]
		if part == sorted(part):
			break
	else:
		n //= 2
		continue
	break
print(n)


import sys

class Main:

	def __init__(self):
		self.buff = None
		self.index = 0

	def next(self):
		if self.buff is None or self.index == len(self.buff):
			self.buff = sys.stdin.readline().split()
			self.index = 0
		val = self.buff[self.index]
		self.index += 1
		return val

	def next_int(self):
		return int(self.next())

	def check(self, x):
		d = 0
		for i in x:
			if i < d:
				return False
			d = i
		return True

	def f(self, x):
		l = len(x)
		if self.check(x):
			return l
		return max(self.f(x[:l // 2]), self.f(x[l // 2:]))

	def solve(self):
		n = self.next_int()
		x = [self.next_int() for _ in range(0, n)]
		print(self.f(x))
Main().solve()


n = int(input())
a = [int(k) for k in input().split(' ')]
nn = n
res = 1
while nn > 1:
	jj = 0
	while jj < n:
		if sorted(a[jj:jj + nn]) == a[jj:jj + nn]:
			res = nn
			break
		jj += nn
	if res >= nn:
		break
	nn >>= 1
print(res)


def is_sorted(a):
	prev = None
	for i in a:
		if prev is not None and i < prev:
			return False
		prev = i
	return True

def solve(a):
	if len(a) == 1:
		return 1
	if is_sorted(a):
		return len(a)
	return max(solve(a[:len(a) // 2]), solve(a[len(a) // 2:]))
n = int(input())
a = [int(p) for p in input().split()]
print(solve(a))


array_size = int(input())
arr = [int(x) for x in input().split()]

def max_sorted_array_length(array):
	total_count = 0
	if len(array) == 1:
		return 1
	for i in range(0, len(array) - 1):
		if array[i] <= array[i + 1]:
			total_count += 1
			continue
		else:
			first_phase = max_sorted_array_length(array[0:len(array) // 2])
			second_phase = max_sorted_array_length(array[len(array) // 2:len(array)])
			if first_phase >= second_phase:
				return first_phase
			else:
				return second_phase
	total_count += 1
	if total_count == len(array):
		return total_count
print(max_sorted_array_length(arr))


def spliter(arr, low, high):
	if high - low == 1:
		return 1
	if arr[low:high] == sorted(arr[low:high]):
		return high - low
	else:
		mid = (high + low) // 2
		a = spliter(arr, low, mid)
		b = spliter(arr, mid, high)
		if a >= b:
			return a
		else:
			return b

def main():
	n = int(input())
	arr = list(map(int, input().split(' ')))
	lenght = n
	if arr == sorted(arr):
		print(n)
	else:
		mid = lenght // 2
		a = spliter(arr, 0, mid)
		b = spliter(arr, mid, lenght)
		if a > b:
			print(a)
		else:
			print(b)
main()


def test(r):
	for i in range(len(r)):
		if i % 2 == 0 and r[i] != 0:
			return True
	return False
n = int(input())
s = list(map(int, input().split()))
t = 1
l = []
for i in range(n - 1):
	if s[i] <= s[i + 1]:
		l += [1]
	else:
		l += [0]
while test(l):
	t *= 2
	j = 3
	i = 0
	k = []
	while i + j <= len(l):
		if j == 1:
			k += [l[i]]
		elif sum(l[i:i + j]) == 3:
			k += [1]
		else:
			k += [0]
		i += j
		j = 4 - j
	l = k
print(t)


li = []

def fun(arr):
	if arr == sorted(arr):
		return len(arr)
	if len(arr) > 1:
		mid = len(arr) // 2
		L = arr[:mid]
		R = arr[mid:]
		li.append(fun(L))
		li.append(fun(R))
	return li
a = int(input())
l = list(map(int, input().split()))
l = fun(l)
if type(l) == int:
	print(l)
else:
	li = []
	for i in l:
		if type(i) != list:
			li.append(i)
	print(max(li))


n = int(input())
a = input()
a = a.split()
result = [1]
g = 0
for i in range(n):
	a[i] = int(a[i])

def check(n, a, g):
	if n == 1:
		result[g] = 1
		return result
	count = [1]
	k = 0
	for i in range(n - 1):
		if a[i] <= a[i + 1]:
			count[k] += 1
		else:
			k += 1
			count.append(1)
	if count[0] >= n:
		result[g] = n
		g += 1
	elif (count[0] or count[len(count) - 1]) >= int(n / 2):
		result[g] = int(n / 2)
		g += 1
	else:
		check(int(n / 2), a[0:int(n / 2) + 1], g)
		check(n - int(n / 2), a[int(n / 2):n], g)
check(n, a, g)
print(max(result))


import math
n = int(input())
s = input().split()
list1 = []
for i in range(n - 1):
	if int(s[i]) > int(s[i + 1]):
		list1.append(i + 1)
list1.append(0)
list1.append(n)
list1.sort()
a = len(list1)
b = math.log(n, 2)
c = 1
for i in range(int(b + 1)):
	for j in range(int(a - 1)):
		if int(list1[j + 1] / (n / 2 ** i)) > math.ceil(list1[j] / (n / 2 ** i)):
			c = max(int(n / 2 ** i), c)
print(int(c))


def f(l):
	n = len(l)
	w = True
	for i in range(n - 1):
		if l[i] > l[i + 1]:
			w = False
			break
	if w == True:
		return n
	else:
		return max(f(l[:n // 2]), f(l[n // 2:]))
n = int(input())
arr = [int(i) for i in input().split()]
print(f(arr))


n = int(input())
l = list(map(int, input().split()))
if n == 1:
	print(1)
elif n == 2:
	if l == sorted(l):
		print(2)
	else:
		print(1)
elif n == 4:
	if l == sorted(l):
		print(4)
	elif l[:2] == sorted(l[:2]):
		print(2)
	elif l[2:] == sorted(l[2:]):
		print(2)
	else:
		print(1)
elif n == 8:
	if l == sorted(l):
		print(8)
	elif l[:4] == sorted(l[:4]):
		print(4)
	elif l[4:] == sorted(l[4:]):
		print(4)
	elif l[:2] == sorted(l[:2]):
		print(2)
	elif l[2:4] == sorted(l[2:4]):
		print(2)
	elif l[4:6] == sorted(l[4:6]):
		print(2)
	elif l[6:] == sorted(l[6:]):
		print(2)
	else:
		print(1)
elif n == 16:
	if l == sorted(l):
		print(16)
	elif l[:8] == sorted(l[:8]):
		print(8)
	elif l[8:] == sorted(l[8:]):
		print(8)
	elif l[:4] == sorted(l[:4]):
		print(4)
	elif l[4:8] == sorted(l[4:8]):
		print(4)
	elif l[8:12] == sorted(l[8:12]):
		print(4)
	elif l[12:] == sorted(l[12:]):
		print(4)
	elif l[:2] == sorted(l[:2]):
		print(2)
	elif l[2:4] == sorted(l[2:4]):
		print(2)
	elif l[4:6] == sorted(l[4:6]):
		print(2)
	elif l[6:8] == sorted(l[6:8]):
		print(2)
	elif l[8:10] == sorted(l[8:10]):
		print(2)
	elif l[10:12] == sorted(l[10:12]):
		print(2)
	elif l[12:14] == sorted(l[12:14]):
		print(2)
	elif l[14:] == sorted(l[14:]):
		print(2)
	else:
		print(1)


n = int(input())
a = list(map(int, input().split()))

def issorted(x):
	for i in range(1, len(x)):
		if x[i] < x[i - 1]:
			return False
	return True

def compute(x):
	if issorted(x):
		return len(x)
	l = len(x) // 2
	return max(compute(x[:l]), compute(x[l:]))
print(compute(a))


def main(n):
	arr = [int(i) for i in input().split()]
	x = n
	while x > 1:
		b = 0
		while True:
			a = b
			b = a + x
			if isSorted(arr[a:b]):
				return x
			if b == n:
				break
		x = x // 2
	return 1

def isSorted(arr):
	n = len(arr)
	temp_arr = arr.copy()
	temp_arr.sort()
	if arr == temp_arr:
		return True
print(main(int(input())))


n = int(input())
L = [*map(int, input().split())]
p = n
while all((L[i:i + p] != sorted(L[i:i + p]) for i in range(0, n, p))):
	p >>= 1
print(p)


N = int(input())
L = list(map(int, input().split()))
maxi = [1]

def iss(L, maxi):
	if L == 1:
		return
	s = len(L)
	if L == sorted(L):
		if s > maxi[0]:
			maxi[0] = s
		return
	s //= 2
	iss(L[:s], maxi)
	iss(L[s:], maxi)
iss(L, maxi)
print(maxi[0])


n = int(input())
l = list(map(int, input().split()))
t = 2
ans = 1
while t <= 16:
	for i in range(0, n - t + 1, t):
		t1 = []
		t2 = []
		for j in range(t):
			t1.append(l[i + j])
			t2.append(l[i + j])
		t1.sort()
		if t1 == t2:
			ans = t
	t *= 2
print(ans)


inp = int(input())
ar = list(map(int, input().split()))

def Tsort(a):
	leng = int(len(a) / 2)
	sort = sorted(a)
	if a == sort:
		return len(a)
	else:
		return max(Tsort(a[:leng]), Tsort(a[leng:]))
print(Tsort(ar))


class Tanos:

	def __init__(self):
		self.n = int(input())
		self.result = 0
		in_arr = list(map(int, input().split()))
		self.chek(in_arr)
		print(self.result)

	def chek(self, in_arr):
		if in_arr == sorted(in_arr):
			if len(in_arr) > self.result:
				self.result = len(in_arr)
		else:
			self.chek(in_arr[:len(in_arr) // 2])
			self.chek(in_arr[len(in_arr) // 2:])
Tanos()


def thanosSort(seq: list) -> int:
	if seq == sorted(seq):
		return len(seq)
	else:
		a = thanosSort(seq[0:len(seq) // 2])
		b = thanosSort(seq[len(seq) // 2:])
		return max(a, b)
n = int(input())
seq = list(map(int, input().split()))
print(thanosSort(seq))


TN = 1

def solution():
	n = int(input())
	a = list(map(int, input().split()))
	ans = 1
	if n > 1:
		for i in range(0, n, 2):
			if a[i:i + 2] == sorted(a[i:i + 2]):
				ans = 2
		if n > 3:
			for i in range(0, n, 4):
				if a[i:i + 4] == sorted(a[i:i + 4]):
					ans = 4
			if n > 7:
				for i in range(0, n, 8):
					if a[i:i + 8] == sorted(a[i:i + 8]):
						ans = 8
				if n > 15:
					for i in range(0, n, 16):
						if a[i:i + 16] == sorted(a[i:i + 16]):
							ans = 16
	print(ans)
while TN != 0:
	solution()
	TN -= 1


import sys
from functools import lru_cache
from heapq import merge, heapify, heappop, heappush
from math import ceil, floor, gcd, fabs, factorial, fmod, sqrt, inf
from collections import defaultdict as dd, deque, Counter as c
from itertools import combinations as comb, permutations as perm
from bisect import bisect_left as bl, bisect_right as br, bisect
mod = pow(10, 9) + 7
mod2 = 998244353

def data():
	return sys.stdin.readline().strip()

def out(var):
	sys.stdout.write(str(var))

def outln(var):
	sys.stdout.write(str(var) + '\n')

def l():
	return list(sp())

def sl():
	return list(ssp())

def sp():
	return map(int, data().split())

def ssp():
	return map(str, data().split())

def l1d(n, val=0):
	return [val for i in range(n)]

def l2d(n, m, val=0):
	return [l1d(n, val) for j in range(m)]
n = int(data())
arr = l()
i = 2
answer = 1
while i <= n:
	for j in range(n - i + 1):
		if j % i != 0:
			continue
		temp = arr[j:j + i]
		r = True
		for k in range(i - 1):
			if temp[k + 1] < temp[k]:
				r = False
				break
		if r:
			answer = i
	i *= 2
outln(answer)


n = int(input())
a = list(map(int, input().split()))
ma = 0

def re(l, r):
	global a, ma
	if list(sorted(a[l:r + 1])) == a[l:r + 1]:
		ma = max(ma, r - l + 1)
	if r != l:
		x = (l + r) // 2
		re(l, x)
		re(x + 1, r)
re(0, n - 1)
print(ma)


maxx = -1

def ts(arr):
	if len(arr) > 1:
		mid = len(arr) // 2
		L = arr[:mid]
		R = arr[mid:]
		ts(L)
		ts(R)
		global maxx
		neu = arr
		neu = sorted(neu)
		if neu == arr and len(arr) > maxx:
			maxx = len(arr)
n = int(input())
arr = list(map(int, input().split()))
ts(arr)
print(1 if maxx == -1 else maxx)


def isSorted(arr):
	ln = len(arr)
	for it in range(1, len(arr)):
		if arr[it] < arr[it - 1]:
			ln = max(isSorted(arr[0:len(arr) // 2]), isSorted(arr[len(arr) // 2:]))
			break
	return ln
n = int(input())
elements = list(map(int, str(input()).split()))
print(isSorted(elements))


def is_sorted(a, l, r):
	for i in range(l + 1, r):
		if a[i] < a[i - 1]:
			return False
	return True

def solve(a, l, r):
	if is_sorted(a, l, r):
		return r - l
	return max(solve(a, l, (r + l) // 2), solve(a, (r + l) // 2, r))

def main() -> None:
	n = int(input())
	a = list(map(int, input().split()))
	print(solve(a, 0, n))

def __starting_point():
	main()
__starting_point()


input()
a = list(map(int, input().split()))

def isSorted(x):
	return list(x) == list(sorted(x))

def thanos(arr):
	if isSorted(arr):
		return arr
	n = len(arr)
	return max([thanos(arr[:n // 2]), thanos(arr[n // 2:])], key=len)
print(len(thanos(a)))


def isequal(x, y):
	p = 0
	for i in range(len(x)):
		if x[i] == y[i]:
			p += 1
	if p == len(x):
		return True
	else:
		return False

def f(arr):
	if len(arr) == 1:
		return 1
	b = list((i for i in arr))
	b.sort()
	if isequal(b, arr):
		return len(b)
	return max(f(arr[len(arr) // 2:]), f(arr[:len(arr) // 2]))
n = int(input())
a = list(map(int, input().split()))
print(f(a))


def takeArray(start, end):
	global maxLen
	lastIndex = end - 1
	if start == lastIndex:
		return
	for k in range(start, lastIndex):
		if array[k] > array[k + 1]:
			mid = int((start + lastIndex) / 2)
			takeArray(start, mid + 1)
			takeArray(mid + 1, end)
			return
		elif k == lastIndex - 1:
			le = end - start
			if le > maxLen:
				maxLen = le
			return
loo = int(input(''))
array = list(map(int, input().split()))
maxLen = 1
takeArray(0, loo)
print(maxLen)


def checkArray(arr):
	maximum = 0
	if sorted(arr) == arr or len(arr) == 1:
		return len(arr)
	else:
		maximum = checkArray(arr[:int(len(arr) / 2)])
		temp = checkArray(arr[int(len(arr) / 2):])
		maximum = temp if temp > maximum else maximum
		return maximum
n = int(input())
arr = [int(x) for x in input().split(' ')]
print(checkArray(arr))


def max_length(ar):
	l = len(ar)
	if ar > sorted(ar):
		return max(max_length(ar[:l // 2]), max_length(ar[l // 2:]))
	return l
n = int(input())
a = list(map(int, input().split()))
print(max_length(a))


size = int(input())
str = input()
arr = [int(s) for s in str.split()]

def isSorted(arr):
	for i in range(1, len(arr)):
		if arr[i - 1] > arr[i]:
			return False
	return True

def largest(a, b):
	a if a > b else b

def getMax(a, b):
	return a if a > b else b

def sort(arr):
	length = len(arr)
	if len == 1:
		return 1
	if isSorted(arr):
		return len(arr)
	half = int(length / 2)
	return getMax(sort(arr[:half]), sort(arr[half:]))
max = sort(arr)
print(max)


def is_sorted(arr):
	for (index, elem) in enumerate(arr):
		if index + 1 < len(arr) and elem > arr[index + 1]:
			return False
	return True

def thanos_sort(arr):
	if len(arr) == 1:
		return 1
	elif is_sorted(arr):
		return len(arr)
	else:
		half = int(len(arr) / 2)
		first = thanos_sort(arr[0:half])
		second = thanos_sort(arr[half:len(arr)])
		if first > second:
			return first
		else:
			return second
n = int(input())
data = list(map(int, input().split()))
print(thanos_sort(data))


n = int(input())
a = input().split()
a = [int(i) for i in a]
k = n
answer = 1
while k >= 1:
	for i in range(n // k):
		for j in range(i * k, i * k + k - 1):
			if a[j] > a[j + 1]:
				break
		else:
			answer = k
			k = 0
			break
	k = k // 2
print(answer)


def isSorted(arr):
	last = 0
	for el in arr:
		if last > el:
			return False
		last = el
	return True

def thanos(arr):
	if isSorted(arr):
		return len(arr)
	first = arr[:int(len(arr) / 2)]
	second = arr[int(len(arr) / 2):]
	return max(thanos(first), thanos(second))
input()
array = list(map(int, input().split(' ')))
print(thanos(array))


n = int(input())
l = [int(x) for x in input().split()]
found = False
d = n * 2
while not found:
	d = d // 2
	for i in range(0, n, d):
		p = l[i:i + d]
		if p == sorted(p):
			found = True
print(d)


n = int(input())
l = input().split()
for i in range(len(l)):
	l[i] = int(l[i])
i = 1
flag = True
while i <= n:
	for j in range(i):
		x = l[j * int(n // i):(j + 1) * int(n // i)]
		if sorted(x) == x:
			flag = False
			break
	if flag == False:
		break
	i *= 2
print(n // i)


def run(num, l):
	flag = 0
	for i in range(1, num):
		if l[i] < l[i - 1]:
			flag = 1
			cntl = run(num >> 1, l[0:num >> 1])
			cntr = run(num >> 1, l[num >> 1:num])
			cnt = max(cntl, cntr)
			return cnt
	if flag == 0:
		return num
a = int(input().strip())
b = map(int, input().strip().split())
b = list(b)
ans = run(a, b)
print(ans)


n = int(input())
a = list(map(int, input().split()))
i = 1
best = 1
while i <= n:
	for j in range(0, n, i):
		if a[j:i + j] == sorted(a[j:i + j]):
			best = i
	i *= 2
print(best)


n = int(input())
l = list(map(int, input().split()))
f = True
while f and n > 1:
	for m in range(len(l) // n):
		k = l[m * n:m * n + n]
		if all([i == j for (i, j) in zip(k, sorted(k))]):
			f = False
	if f:
		n >>= 1
print(n)


import math

def check(list1, low, high):
	if low >= high:
		return 1
	if any([list1[i] > list1[i + 1] for i in range(low, high)]):
		n = int((low + high + 1) / 2)
		return max(check(list1, low, n - 1), check(list1, n, high))
	else:
		return high - low + 1
n = int(input())
list_number = input().split()
for i in range(n):
	list_number[i] = int(list_number[i])
print(check(list_number, 0, n - 1))


def fun(l, n):
	if sorted(l) == l:
		return n
	else:
		return max(fun(l[:n // 2], n // 2), fun(l[n // 2:], n // 2))
n = int(input())
l = [int(x) for x in input().split()]
print(fun(l, n))


ans = 1

def is_sorted(myl):
	return all((myl[i] <= myl[i + 1] for i in range(len(myl) - 1)))

def main(myl):
	global ans
	if type(myl) is not list:
		myl = [myl]
	if len(myl) != 1:
		main(myl[0:len(myl) // 2])
		main(myl[len(myl) // 2:])
	if is_sorted(myl):
		ans = max(len(myl), ans)
	return
n = int(input())
myl = [int(x) for x in input().split()]
main(myl)
print(ans)


from random import randint

def thanos_sort(n, l):
	while n >= 1:
		if l == sorted(l):
			return len(l)
			break
		else:
			l = l[:len(l) // 2] if sorted(l[:len(l) // 2]) == l[:len(l) // 2] else l[len(l) // 2:]
			n = len(l)
print(thanos_sort(int(input()), list(map(int, input().split()))))


def tanos(mas):
	l = len(mas)
	a = []
	b = []
	ans = 0
	t1 = t2 = 0
	if l == 1:
		return 1
	for i in range(l - 1):
		if mas[i] > mas[i + 1]:
			for j in range(l // 2):
				a.append(mas[j])
				b.append(mas[j + l // 2])
			ans = max(tanos(a), tanos(b), ans)
			break
	else:
		return l
	return ans
k = input()
k = int(k)
mas = [0] * k
a = k
inp = input()
for i in inp.split(' '):
	mas[k - a] = int(i)
	a -= 1
print(tanos(mas))


def thanos_sort(L):
	n = len(L)
	if n == 1:
		return (True, 1)
	(left, nl) = thanos_sort(L[:n // 2])
	(right, nr) = thanos_sort(L[n // 2:])
	if left and right:
		if L[n // 2 - 1] <= L[n // 2]:
			return (True, nr + nl)
		return (False, max(nr, nl))
	return (False, max(nr, nl))
n = int(input())
nums = list(map(int, input().split(' ')))
print(thanos_sort(nums)[1])


import sys
import math
get_string = lambda : sys.stdin.readline().strip()
get_int_list = lambda : list(map(int, sys.stdin.readline().strip().split()))
get_int = lambda : int(sys.stdin.readline())
n = get_int()
lst = get_int_list()
k = n
ans = 1
flag = True
while k > 0:
	for i in range(0, n - k + 1, k):
		temp = lst[i:i + k]
		if temp == sorted(temp):
			ans = k
			k = 0
			break
	k = k // 2
print(ans)


def search(arr):
	if arr == sorted(arr):
		return len(arr)
	return max(search(arr[:int(len(arr) / 2)]), search(arr[int(len(arr) / 2):]))
n = int(input())
a = list(map(int, input().split()))
print(search(a))


def is_sorted(massiv):
	check = massiv.copy()
	check.sort()
	if check == massiv:
		return True
	else:
		return False

def max_row(massiv):
	sum = 1
	max = -1
	for i in range(len(massiv) - 1):
		if massiv[i] <= massiv[i + 1]:
			sum += 1
		elif sum > max:
			max = sum
	if max == -1:
		max = sum
	return max

def solution(massiv):
	if is_sorted(massiv):
		return len(massiv)
	if len(massiv) % 2 != 0:
		half = len(massiv) // 2
		first = massiv[:half + 1].copy()
		second = massiv[half:].copy()
	else:
		half = len(massiv) // 2
		first = massiv[:half].copy()
		second = massiv[half:].copy()
	if max_row(first) > max_row(second):
		return solution(first)
	else:
		return solution(second)
number = input()
massiv = list(map(int, input().split()))
print(solution(massiv))


n = int(input())
a = list(map(int, input().split(' ')))

def thanos(a):
	if a == sorted(a):
		return len(a)
	i = len(a) // 2
	return max(thanos(a[:i]), thanos(a[i:]))
print(thanos(a))


def largest_sorted(a, s, n):
	if s - n + 1 == 1:
		return 1
	for i in range(s, n):
		if a[i] > a[i + 1]:
			mid = s + int((n - s + 1) // 2) - 1
			left = largest_sorted(a, s, mid)
			right = largest_sorted(a, mid + 1, n)
			return max(left, right)
	return n - s + 1

def main():
	n = int(input())
	arr = list(map(int, input().split()))
	print(largest_sorted(arr, 0, n - 1))
main()


def func(start, end, l):
	t = -1
	for i in range(start + 1, end):
		if l[i - 1] > l[i]:
			t = i
			break
	if t == -1:
		return end - start
	if t < (end + start) / 2:
		x = func(int((end + start) / 2), end, l)
	else:
		x = func(start, int((end + start) / 2), l)
	return x
n = int(input())
l = list(map(int, input().split()))
print(func(0, n, l))


n = int(input())
a = list(map(int, input().split()))

def is_sorted_up(array):
	for i in range(1, len(array)):
		if not array[i - 1] <= array[i]:
			return False
	return True

def tanos(array):
	lst_1 = []
	lst_2 = []
	if is_sorted_up(array):
		final.append(len(array))
	else:
		n = len(array) / 2
		for i in range(0, int(n)):
			lst_1.append(array[i])
		tanos(lst_1)
		for i in range(int(n), len(array)):
			lst_2.append(array[i])
		tanos(lst_2)
final = []
tanos(a)
print(max(final))


N = int(input())
A = [int(a) for a in input().split()]

def calc(X):
	if X == sorted(X):
		return len(X)
	A = X[:len(X) // 2]
	B = X[len(X) // 2:]
	return max(calc(A), calc(B))
print(calc(A))


def cs(a):
	for i in range(1, len(a)):
		if a[i] < a[i - 1]:
			return False
	return True

def recuse(c):
	if cs(c):
		return len(c)
	else:
		return max(recuse([c[i] for i in range(len(c) // 2)]), recuse([c[i] for i in range(len(c) // 2, len(c))]))
input()
print(recuse([int(i) for i in input().split(' ')]))


a = int(input())
x = [int(i) for i in input().split()]
y = [int(i) for i in x]
t = []

def ss(a):
	if a == sorted(a):
		t.append(len(a))
	elif len(a) > 1:
		ss(a[0:len(a) // 2])
		ss(a[len(a) // 2:len(a)])
	return t
print(max(ss(x)))


numbers = []

def thanos_sort(listThing, currentMax):
	if len(listThing) == 1:
		numbers.append(currentMax)
	mid = int(len(listThing) / 2)
	if listThing == sorted(listThing):
		if currentMax < len(listThing):
			currentMax = len(listThing)
			numbers.append(currentMax)
	else:
		mid = int(len(listThing) / 2)
		thanos_sort(listThing[:mid], currentMax)
		thanos_sort(listThing[mid:], currentMax)
n = int(input())
things = list(map(int, input().split()))
thanos_sort(things, 1)
print(max(numbers))


def thanosSort(arr):
	if all((arr[x] <= arr[x + 1] for x in range(len(arr) - 1))):
		return len(arr)
	else:
		return max(thanosSort(arr[:len(arr) // 2]), thanosSort(arr[len(arr) // 2:]))
n = int(input())
inp = input()
a = [int(x) for x in inp.split()]
print(thanosSort(a))


n = int(input())
l = list(map(int, input().split()))
i = 2
mx = 1
while i <= n:
	for j in range(0, n, i):
		if sorted(l[j:j + i]) == l[j:j + i]:
			mx = max(mx, i)
	i *= 2
print(mx)


def function(n: int, mass: list):
	res = n
	for (i, item) in enumerate(mass):
		if i == 0:
			continue
		if item < mass[i - 1]:
			new_n = int(n / 2)
			left = mass[:new_n]
			res_l = function(new_n, left)
			right = mass[new_n:]
			res_r = function(new_n, right)
			res = res_l if res_l > res_r else res_r
	return res
n = int(input())
mass = [int(item) for item in input().split()]
print(function(n, mass))


from sys import stdin
import sys
import math
sys.setrecursionlimit(15000)

def get_arr(arr, n):
	super_arr = []
	k = 0
	while 2 ** k <= n:
		temp = 2 ** k
		for i in range(0, n, temp):
			super_arr.append(arr[i:i + temp])
		k += 1
	return super_arr
n = int(stdin.readline().strip())
arr = list(map(int, stdin.readline().split()))
max_count = -float('inf')
super_arr = []
super_arr = get_arr(arr, n)
for part in super_arr:
	temp = 1
	c = part[0]
	for i in range(1, len(part)):
		if part[i] >= c:
			c = part[i]
			temp += 1
		else:
			temp = -float('inf')
			break
	max_count = max(temp, max_count)
print(max_count)


n = int(input())
l = list(map(int, input().split()))

def solve():
	pa = [n, n // 2, n // 4, n // 8, n // 16]
	ans = 1
	for i in pa:
		if i:
			for j in range(0, n, i):
				if l[j:j + i] == sorted(l[j:j + i]):
					print(i)
					return
	else:
		print(1)
		return
solve()


max1 = 0

def thanos(arr, n):
	global max1
	sort_arr = sorted(arr)
	if arr == sort_arr and n > 0:
		max1 = max(max1, n)
		return n
	thanos(arr[:n // 2], n // 2)
	thanos(arr[n // 2:], n // 2)
n = int(input())
lis = list(map(int, input().split()))
v = thanos(lis, n)
print(max1)


n = int(input())
a = [int(t) for t in input().split(' ')]

def is_sorted(a):
	for i in range(1, len(a)):
		if a[i - 1] > a[i]:
			return False
	return True

def check(a):
	if is_sorted(a):
		return len(a)
	return max(check(a[:len(a) // 2]), check(a[len(a) // 2:]))
print(check(a))


n = int(input())
numbers = [int(i) for i in input().strip().split()]
numbers_lists = []
numbers_lists.append(numbers)
answer_found = True
while answer_found is True:
	split_number_lists = []
	if len(numbers_lists[0]) == 1:
		print(1)
		answer_found = False
		break
	for number_list in numbers_lists:
		if number_list == sorted(number_list):
			print(len(number_list))
			answer_found = False
			break
		else:
			marker = int(len(number_list) / 2)
			split_number_lists.append(number_list[:marker])
			split_number_lists.append(number_list[marker:])
	numbers_lists = split_number_lists


def is_sorted(array):
	for i in range(len(array) - 1):
		if array[i] > array[i + 1]:
			return False
	return True
solutions = set()

def tanos_sort(array):
	if is_sorted(array):
		solutions.add(len(array))
		return
	tanos_sort(array[:len(array) // 2])
	tanos_sort(array[len(array) // 2:len(array)])
input()
tanos_sort([int(i) for i in input().split(' ')])
print(max(solutions))


n = int(input())
l = [int(i) for i in input().split()]
if n == 1:
	print('1')
else:
	while n > 1:
		if l == sorted(l, reverse=True):
			print('1')
			break
		elif l == sorted(l):
			print(n)
			break
		elif l[:n // 2] != sorted(l[:n // 2]):
			l = l[n // 2:]
			n //= 2
		else:
			l = l[:n // 2]
			n //= 2


a = int(input())
b = input().split()
c = [int(i) for i in b]

def d(e):
	if e == sorted(e):
		return len(e)
	else:
		f = len(e) // 2
		g = e[:f]
		h = e[f:]
		return max(d(h), d(g))
print(d(c))


n = int(input())
a = list(map(int, input().split()))

def thanos_sort(st, en):
	if st == en:
		return 1
	(f, tmp) = (0, -1)
	for i in range(st, en + 1):
		if a[i] >= tmp:
			tmp = a[i]
		else:
			f = 1
			break
	if f == 0:
		return en - st + 1
	(ans1, ans2) = (0, 0)
	mid = int((st + en) / 2)
	ans1 = thanos_sort(st, mid)
	ans2 = thanos_sort(mid + 1, en)
	return max(ans1, ans2)
print(thanos_sort(0, n - 1))


n = int(input())
a = [int(w) for w in input().split()]

def is_sorted(l, r):
	for i in range(l, r - 1):
		if a[i] > a[i + 1]:
			return False
	return True

def solve():
	k = n
	while k > 0:
		for i in range(0, n, k):
			if is_sorted(i, i + k):
				return k
		k //= 2
print(solve())


n = int(input())
l = input()
lis = [[int(x) for x in l.split()]]
sort = False
asize = len(lis[0])
while not sort:
	for x in lis:
		if x == sorted(x):
			print(asize)
			sort = True
			break
	else:
		asize //= 2
		nlis = []
		for x in lis:
			nlis.append(x[:asize])
			nlis.append(x[asize:])
		lis = nlis


import sys

def tanos_sort(arr, s, e):
	middle = s + (e - s) // 2
	length = middle - s
	for i in range(1, length):
		if arr[s + i] < arr[s + i - 1]:
			return tanos_sort(arr, middle, e)
		elif arr[middle + i] < arr[middle + i - 1]:
			return tanos_sort(arr, s, middle)
	if arr[middle - 1] <= arr[middle]:
		return e - s
	else:
		return middle - s

def main():
	n = int(sys.stdin.readline())
	arr = [int(v) for v in sys.stdin.readline().split()]
	print(tanos_sort(arr, 0, n))
main()


def ttt(a, c):
	ind = 0
	while ind < len(a):
		for i in range(1, c):
			if a[ind + i] < a[ind + i - 1]:
				break
		else:
			return True
		ind += c
	return False
n = int(input())
a = [int(s) for s in input().split()]
t = 1
if n >= 2 and ttt(a, 2) == True:
	if n >= 4 and ttt(a, 4) == True:
		if n >= 8 and ttt(a, 8) == True:
			if n >= 16 and ttt(a, 16) == True:
				print(16)
			else:
				print(8)
		else:
			print(4)
	else:
		print(2)
else:
	print(1)


n = int(input())
a = list(map(int, input().split()))

def recursiveFunction(a, x=[]):
	if a == sorted(a):
		x.append(len(a))
	else:
		z = len(a) // 2
		recursiveFunction(a[:z], x)
		recursiveFunction(a[z:], x)
	return max(x)
print(recursiveFunction(a))


a = int(input())
b = input()
op = 1

def divide(num, arr):
	global op
	for i in range(1, num):
		if not arr[i - 1] <= arr[i]:
			divide(int(num / 2), arr[:int(num / 2)])
			divide(int(num / 2), arr[int(num / 2):])
			return 0
	if num >= op:
		op = num
if a > 0 and a < 17:
	b = [int(num) for num in b.split(' ')]
	divide(a, b)
	print(op)


n = int(input())
arr = list(map(int, input().split()))

def thanos_sort(arr):
	snap = False
	for i in range(len(arr) - 1):
		if arr[i] > arr[i + 1]:
			snap = True
	if snap:
		l1 = thanos_sort(arr[:len(arr) // 2])
		l2 = thanos_sort(arr[len(arr) // 2:])
		return max(l1, l2)
	return len(arr)
print(thanos_sort(arr))


def IsSorted(n):
	if len(n) == 1:
		return 1
	k = n[0]
	for i in range(1, len(n)):
		if n[i] >= k:
			k = n[i]
		else:
			return 0
	return 1

def Solve(k):
	if IsSorted(k):
		return len(k)
	else:
		m = int(len(k) / 2)
		p = Solve(k[0:m])
		q = Solve(k[m:len(k)])
		return max(p, q)
n = int(input())
a = []
d = input()
d = d.split(' ')
for i in d:
	if i != '':
		a.append(int(i))
print(Solve(a))


def isSorted(num):
	for x in range(1, len(num)):
		if num[x] < num[x - 1]:
			return False
	return True

def Snap(arr):
	if len(arr) == 1:
		return 1
	elif isSorted(arr):
		return len(arr)
	else:
		a = Snap(arr[0:len(arr) // 2])
		b = Snap(arr[len(arr) // 2:len(arr)])
		return a if a > b else b
leng = int(input())
numbers = []
for x in input().split(' '):
	numbers.append(int(x))
print(Snap(numbers))


input()
ara = list(map(int, input().split()))
while not ara == sorted(ara):
	ara1 = ara[0:int(len(ara) / 2)]
	ara2 = ara[int(len(ara) / 2):]
	(c1, c2, sizes1, sizes2, i) = (1, 1, [], [], 1)
	for num in ara1[0:-1]:
		if num <= ara1[i]:
			c1 += 1
		else:
			if c1 > 1:
				sizes1.append(c1)
			c1 = 1
		i += 1
	sizes1.append(c1)
	i = 1
	for num in ara2[0:-1]:
		if num <= ara2[i]:
			c2 += 1
		else:
			if c2 > 1:
				sizes2.append(c2)
			c2 = 1
		i += 1
	sizes2.append(c2)
	sizes1 = sorted(sizes1)
	sizes2 = sorted(sizes2)
	if sizes1[-1] > sizes2[-1]:
		ara = ara1
	else:
		ara = ara2
print(len(ara))


n = int(input())
a = list(map(int, input().split()))

def sort(a):
	len_a = len(a)
	if len_a == 1:
		return 1
	elif a == sorted(a):
		return len_a
	else:
		left = sort(a[0:len_a // 2])
		right = sort(a[len_a // 2:len_a])
		return max(left, right)
result = sort(a)
print(result)


def checkSort(array):
	for i in range(len(array) - 1):
		if array[i] > array[i + 1]:
			return False
	return True

def getMaxLength(array):
	if len(array) == 1:
		return 1
	if checkSort(array):
		return len(array)
	return max(getMaxLength(array[:len(array) // 2]), getMaxLength(array[len(array) // 2:]))

def main():
	n = int(input())
	array = [int(number) for number in input().split(' ')]
	print(getMaxLength(array))
main()


def solution(array):
	for i in range(1, len(array)):
		if array[i - 1] > array[i]:
			return max(solution(array[:len(array) // 2]), solution(array[len(array) // 2:]))
	return len(array)
n = input('')
array = input('')
array = array.split(' ')
for i in range(len(array)):
	array[i] = int(array[i])
print(solution(array))


from math import *
nbElements = int(input())
numbers = list(map(int, input().split(' ')))
a = 1
rang = 0
length = 1
while a:
	goal = int(nbElements // pow(2, rang))
	for i in range(length):
		b = 1
		for loop in range(i * goal, (i + 1) * goal - 1):
			if numbers[loop] <= numbers[loop + 1]:
				b += 1
		if b == goal:
			a = 0
			c = b
	rang += 1
	length *= 2
print(c)


n = int(input())
a = list(map(int, input().split()))

def is_sorted(a):
	sorted = True
	i = 0
	len_a = len(a) - 1
	while i < len_a and sorted:
		sorted = a[i] <= a[i + 1]
		i = i + 1
	return sorted

def max_ts_len(a):
	if is_sorted(a):
		return len(a)
	else:
		half_len = len(a) // 2
		left_arr = a[0:half_len]
		right_arr = a[half_len:]
		return max(max_ts_len(left_arr), max_ts_len(right_arr))
print(max_ts_len(a))


def check_sort(length, list):
	if length == 1:
		return 1
	else:
		length = length // 2
		list1 = list[0:length]
		a = check_sort(length, list1)
		x = 2 * length
		list2 = list[length:x]
		b = check_sort(length, list2)
		if a > b:
			return a
		elif b > a:
			return b
		if a == length and b == length:
			if list1[-1] > list2[0]:
				return a
			else:
				return a + b
		else:
			return a
length = int(input())
list_elements = list(map(int, input().split(' ')))
snap = check_sort(length, list_elements)
print(str(snap))


sortedArrays = []

def isSorted(array):
	lastElement = array[0]
	for i in array:
		if lastElement <= i:
			lastElement = i
		else:
			return False
	return True

def thanos(array, i):
	global sortedArrays
	lenght = len(array)
	if isSorted(array) or lenght == 1:
		if lenght > 1:
			sortedArrays.append(array)
		return True
	else:
		lenght = lenght // 2
		otherArray = array.copy()
		if len(otherArray) > 2:
			thanos(otherArray[len(otherArray) // 2:], 2)
			thanos(otherArray[:len(otherArray) // 2], 1)
n = int(input())
numbers = input().split(' ')
for i in range(n):
	numbers[i] = int(numbers[i])
thanos(numbers, 0)
maxLen = 1
for arreglo in sortedArrays:
	l = len(arreglo)
	if l >= maxLen:
		maxLen = l
print(maxLen)


n = int(input())
arr = list(map(int, input().split()))
i = n
while i:
	for j in range(n // i):
		if arr[j * i:(j + 1) * i] == sorted(arr[j * i:(j + 1) * i]):
			print(i)
			exit()
	i //= 2


def solve(arr, l, r):
	if l == r:
		return 1
	for i in range(l, r):
		if arr[i] > arr[i + 1]:
			mid = int((l + r) / 2)
			return max(solve(arr, l, mid), solve(arr, mid + 1, r))
	return r - l + 1
n = int(input())
arr = input().split()
arr = [int(i) for i in arr]
print(solve(arr, 0, n - 1))


def listIsSorted(l):
	prev = 0
	for elem in l:
		if elem < prev:
			return False
		prev = elem
	return True

def longestSortedLength(l):
	length = 1
	maxLength = length
	if len(l) == 1:
		return 1
	for pos in range(len(l)):
		if pos > 0 and l[pos - 1] <= l[pos]:
			length += 1
		else:
			if length > maxLength:
				maxLength = length
			length = 1
	if length > maxLength:
		maxLength = length
	return maxLength
maxSize = input()
l = list(map(int, input().split(' ')))
currL = l
while not listIsSorted(currL):
	leftLen = longestSortedLength(currL[:int(len(currL) / 2)])
	rightLen = longestSortedLength(currL[int(len(currL) / 2):])
	if leftLen > rightLen:
		currL = currL[:int(len(currL) / 2)]
	else:
		currL = currL[int(len(currL) / 2):]
print(len(currL))


n = int(input())
data = [int(e) for e in input().split()]

def sol(k, i):
	div = n // i
	for j in range(1, i + 1):
		if data[(j - 1) * div:j * div] == sorted(data[(j - 1) * div:j * div]):
			return k // 2
	return sol(k // 2, i ** 2)
if data[:n] == sorted(data[:n]):
	print(n)
else:
	print(sol(n, 2))


n = int(input())
m = list(map(int, input().split()))
m1 = sorted(m)
if n == 16:
	if m1 == m:
		print(n)
	else:
		n //= 2
		m1 = m[:n]
		m2 = m[n:]
		if m1 == sorted(m1) or m2 == sorted(m2):
			print(n)
		else:
			n //= 2
			m1 = m[:n]
			m2 = m[n:n + n]
			m3 = m[n + n:n + n + n]
			m4 = m[n + n + n:]
			if m1 == sorted(m1) or m2 == sorted(m2) or m3 == sorted(m3) or (m4 == sorted(m4)):
				print(n)
			else:
				n //= 2
				m1 = m[:n]
				m2 = m[n:n + n]
				m3 = m[n + n:n + n + n]
				m4 = m[n + n + n:n * 4]
				m5 = m[n * 4:n * 5]
				m6 = m[n * 5:n * 6]
				m7 = m[n * 6:n * 7]
				m8 = m[n * 7:]
				if m1 == sorted(m1) or m2 == sorted(m2) or m3 == sorted(m3) or (m4 == sorted(m4)) or (m5 == sorted(m5)) or (m6 == sorted(m6)) or (m7 == sorted(m7)) or (m8 == sorted(m8)):
					print(n)
				else:
					print(1)
elif n == 8:
	if m1 == m:
		print(n)
	else:
		n //= 2
		m1 = m[:n]
		m2 = m[n:]
		if m1 == sorted(m1) or m2 == sorted(m2):
			print(n)
		else:
			n //= 2
			m1 = m[:n]
			m2 = m[n:n + n]
			m3 = m[n + n:n + n + n]
			m4 = m[n + n + n:]
			if m1 == sorted(m1) or m2 == sorted(m2) or m3 == sorted(m3) or (m4 == sorted(m4)):
				print(n)
			else:
				print(1)
elif n == 4:
	if m1 == m:
		print(n)
	else:
		n //= 2
		m1 = m[:n]
		m2 = m[n:]
		if m1 == sorted(m1) or m2 == sorted(m2):
			print(n)
		else:
			print(1)
elif n == 2:
	if m1 == m:
		print(n)
	else:
		n //= 2
		m1 = m[:n]
		m2 = m[n:]
		if m1 == sorted(m1) or m2 == sorted(m2):
			print(n)
		else:
			print(1)
else:
	print(1)


from bisect import bisect_right as br
from bisect import bisect_left as bl
from collections import *
from itertools import *
import functools
import sys
import math
import random
MAX = sys.maxsize
MAXN = 10 ** 5 + 10
MOD = 10 ** 9 + 7

def isprime(n):
	n = abs(int(n))
	if n < 2:
		return False
	if n == 2:
		return True
	if not n & 1:
		return False
	for x in range(3, int(n ** 0.5) + 1, 2):
		if n % x == 0:
			return False
	return True

def mhd(a, b, x, y):
	return abs(a - x) + abs(b - y)

def numIN(x=' '):
	return map(int, sys.stdin.readline().strip().split(x))

def charIN():
	return sys.stdin.readline().strip().split()

def dis(x, y):
	a = y[0] - x[0]
	b = x[1] - y[1]
	return (a * a + b * b) ** 0.5

def chk(a, n):
	x = a.copy()
	x.sort()
	if x == a:
		return (1, n)
	else:
		return (0, n)

def abc(l, n):
	(f1, ans1) = chk(l, n)
	(f2, ans2) = chk(l[:n // 2], n // 2)
	(f3, ans3) = chk(l[n // 2:], n // 2)
	(f4, ans4) = chk(l[:n // 4], n // 4)
	(f5, ans5) = chk(l[n // 4:n // 2], n // 4)
	(f6, ans6) = chk(l[n // 2:3 * (n // 4)], n // 4)
	(f7, ans7) = chk(l[3 * (n // 4):], n // 4)
	if f1:
		return n
	elif f2 or f3:
		return n // 2
	elif f4 or f5 or f6 or f7:
		return n // 4
	else:
		return 1
n = int(input())
l = list(numIN())
if n == 1:
	print(n)
elif n == 2:
	(f1, ans1) = chk(l, n)
	if f1:
		print(ans1)
	else:
		print(1)
elif n == 4:
	(f1, ans1) = chk(l, n)
	(f2, ans2) = chk(l[:n // 2], n // 2)
	(f3, ans3) = chk(l[n // 2:], n // 2)
	if f1:
		print(n)
	elif f2 or f3:
		print(n // 2)
	else:
		print(1)
elif n == 8:
	(f1, ans1) = chk(l, n)
	(f2, ans2) = chk(l[:n // 2], n // 2)
	(f3, ans3) = chk(l[n // 2:], n // 2)
	(f4, ans4) = chk(l[:n // 4], n // 4)
	(f5, ans5) = chk(l[n // 4:n // 2], n // 4)
	(f6, ans6) = chk(l[n // 2:3 * (n // 4)], n // 4)
	(f7, ans7) = chk(l[3 * (n // 4):], n // 4)
	if f1:
		print(n)
	elif f2 or f3:
		print(n // 2)
	elif f4 or f5 or f6 or f7:
		print(n // 4)
	else:
		print(1)
else:
	(f1, ans1) = chk(l, n)
	if f1:
		print(n)
	else:
		x = abc(l[:n // 2], n // 2)
		y = abc(l[n // 2:], n // 2)
		print(max(x, y))


import io, sys, atexit, os
import math as ma
from sys import exit
from decimal import Decimal as dec
from itertools import permutations
from itertools import combinations

def li():
	return list(map(int, input().split()))

def num():
	return map(int, input().split())

def nu():
	return int(input())

def find_gcd(x, y):
	while y:
		(x, y) = (y, x % y)
	return x

def prod(n):
	s = 1
	while n != 0:
		s = s * (n % 10)
		n = n // 10
	return s

def check(xp):
	op = sorted(xp)
	if op == xp:
		return True
mm = 1000000007

def solve():
	t = 1
	for it in range(t):
		n = nu()
		a = li()
		cc = 1
		xp = []
		xp.append(a)
		while n != 1:
			zp = []
			for i in xp:
				if check(i):
					cc = max(cc, len(i))
				if len(i) % 2 == 0:
					op = []
					for j in range(len(i) // 2):
						op.append(i[j])
					zp.append(op)
					op = []
					for j in range(len(i) // 2, len(i)):
						op.append(i[j])
					zp.append(op)
				else:
					if len(i) == 1:
						continue
					op = []
					for j in range(len(i) // 2 + 1):
						op.append(i[j])
					zp.append(op)
					op = []
					for j in range(len(i) // 2, len(i)):
						op.append(i[j])
					zp.append(op)
			n = n // 2
			xp = zp[:]
		print(cc)
solve()


def input_ints():
	return [int(x) for x in input().split()]
input()
xs = input_ints()

def thanos(xs):
	if xs == sorted(xs):
		return len(xs)
	n = len(xs) // 2
	return max(thanos(xs[:n]), thanos(xs[n:]))
print(thanos(xs))


n = int(input())
a = [int(x) for x in input().split()]
i = n
while i != 0:
	for j in range(n // i):
		if sorted(a[j * i:(j + 1) * i]) == a[j * i:(j + 1) * i]:
			print(i)
			i = 0
			break
	i //= 2


n = int(input())
a = list(map(int, input().split()))

def snap(x):
	if len(x) > 1:
		for i in range(len(x) - 1):
			if x[i] > x[i + 1]:
				return max(snap(x[0:len(x) // 2]), snap(x[len(x) // 2:len(x)]))
	return len(x)
print(snap(a))


def tanos_sort(a):
	if a == sorted(a):
		return len(a)
	else:
		return max(tanos_sort(a[len(a) // 2:]), tanos_sort(a[:len(a) // 2]))
input()
print(tanos_sort(list(map(int, input().split()))))


import math
input()
n = input().split()
for i in range(len(n)):
	n[i] = int(n[i])
big = -1

def inOrder(s, e):
	for i in range(s, e):
		if n[i] > n[i + 1]:
			return False
	return True

def recur(s, e):
	global big
	if e - s + 1 > big and inOrder(s, e) == True:
		big = e - s + 1
	elif e - s > 0:
		recur(s + int((e - s + 1) / 2), e)
		recur(s, s + math.floor((e - s) / 2))
recur(0, len(n) - 1)
print(big)


import math
import cmath
n = int(input())
a = list(map(int, input().split()))

def check(l, r):
	global a
	for x in range(l, r):
		if a[x] > a[x + 1]:
			return 0
	return 1

def make(l, r):
	global a
	mid = int((l + r) / 2)
	if check(l, r):
		return r - l + 1
	else:
		p = make(l, mid)
		q = make(mid + 1, r)
		return max(p, q)
print(make(0, n - 1))


def issorted(arr):
	prev = arr[0]
	for num in arr[1:]:
		if num < prev:
			return False
		prev = num
	return True

def solve(arr, n):
	if n == 1:
		return 1
	if issorted(arr):
		return n
	else:
		return max(solve(arr[:n // 2], n // 2), solve(arr[n // 2:], n // 2))
n = int(input())
arr = list(map(int, input().split()))
print(solve(arr, n))


from sys import stdin
inp = stdin.readline
n = int(inp().strip())
array = [int(x) for x in inp().strip().split()]

def thanosSort(a):
	if a == sorted(a):
		return len(a)
	else:
		return max(thanosSort(a[:len(a) // 2]), thanosSort(a[len(a) // 2:]))
print(thanosSort(array))


def isSorted(l):
	tmp = sorted(l)
	return l == tmp

def isRevese(l):
	tmp = l[::-1]
	return isSorted(tmp)
import math
n = int(input())
a = list(map(int, input().split()))
m = int(math.log(n, 2))

def solve():
	for i in range(0, m):
		for j in range(2 ** i):
			(p, q) = (int(j * n / 2 ** i), int((j + 1) * n / 2 ** i))
			if isSorted(a[p:q]):
				print(int(n / 2 ** i))
				return
if isRevese(a):
	print('1')
else:
	solve()


def issorted(a):
	for i in range(len(a) - 1):
		if a[i] > a[i + 1]:
			return False
	return True

def check(a):
	if issorted(a):
		return len(a)
	return max(check(a[0:len(a) // 2]), check(a[len(a) // 2:len(a)]))
n = int(input())
a = [int(x) for x in input().split()]
print(check(a))


n = int(input())
l = list(map(int, input().split()))
c = 0
for i in range(n - 1):
	if l[i] > l[i + 1]:
		c += 1
	if c > 0:
		break
if c == 0:
	print(n)
else:
	while True:
		l1 = l[:n // 2]
		l2 = l[n // 2:]
		c1 = 0
		for i in range(n // 2 - 1):
			if l1[i] > l1[i + 1]:
				c1 += 1
		c2 = 0
		for i in range(n // 2 - 1):
			if l2[i] > l2[i + 1]:
				c2 += 1
		if c1 == 0 or c2 == 0:
			print(n // 2)
			break
		if c1 > c2:
			l = l2
			n = n // 2
		else:
			l = l1
			n = n // 2


def Thanos(H):
	Z = []
	X = []
	if H == sorted(H):
		return len(H)
	else:
		b = int(len(H))
		for i in range(b // 2):
			Z.append(H[i])
		for j in range(b // 2):
			X.append(H[j + b // 2])
		return max(Thanos(Z), Thanos(X))
n = int(input())
A = map(int, input().split())
A = list(A)
print(Thanos(A))


n = int(input())
mas = input().split(' ')
for i in range(len(mas)):
	mas[i] = int(mas[i])
l = []

def sor(a):
	for i in range(len(a) - 1):
		if a[i] > a[i + 1]:
			if sor(a[:int(len(a) / 2)]) or sor(a[int(len(a) / 2):]):
				l.append(len(a) / 2)
			return False
	return True
if sor(mas):
	l.append(len(mas))
else:
	sor(mas[:int(len(mas) / 2)])
print(int(max(l)))


n = int(input())
a = list(map(int, input().split()))
a_s = sorted(a)
if a == a_s:
	print(n)
else:
	while a != a_s:
		n = len(a)
		s1 = 1
		for i in range(1, n // 2):
			if a[i - 1] <= a[i]:
				s1 += 1
		s2 = 1
		for i in range(n // 2 + 1, n):
			if a[i - 1] <= a[i]:
				s2 += 1
		if s1 > s2:
			a = a[:n // 2]
		else:
			a = a[n // 2:]
		a_s = sorted(a)
	print(len(a))


n = int(input())
arr = list(map(int, input().split()))

def func(temp_arr):
	if temp_arr == sorted(temp_arr):
		return len(temp_arr)
	return max(func(temp_arr[:len(temp_arr) // 2]), func(temp_arr[len(temp_arr) // 2:]))
print(func(arr))


def than(arr):
	if sorted(arr) == arr:
		return len(arr)
	else:
		return max(than(arr[:len(arr) // 2]), than(arr[len(arr) // 2:]))
n = int(input())
arr = list(map(int, input().rstrip().split()))
print(than(arr))


array = input()
array = [int(el) for el in input().split(' ')]

def click(array, ind):
	mid = len(array) // 2
	if ind > mid // 2:
		return array[:mid]
	else:
		return array[mid:]

def thanos_sort(arr):
	last_char = 0
	for (ind, el) in enumerate(arr):
		if el < last_char:
			return thanos_sort(click(arr, ind))
		last_char = el
	return str(len(arr))
print(thanos_sort(array))


n = input()
s = list(map(int, input().split()))
w = []
if s == sorted(s):
	w = [len(s)]
else:
	p = s[:len(s) // 2]
	while p != sorted(p):
		p = p[:len(p) // 2]
	w.append(len(p))
	d = s[:len(s) // 2]
	while d != sorted(d):
		d = d[len(d) // 2:]
	w.append(len(d))
	k = s[len(s) // 2:]
	while k != sorted(k):
		k = k[:len(k) // 2]
	w.append(len(k))
	t = s[len(s) // 2:]
	while t != sorted(t):
		t = t[len(t) // 2:]
	w.append(len(t))
print(max(w))


n = input()
n = int(n)
s = input()
s = s.split()
t = [1]
for i in range(n):
	s[i] = int(s[i])
for i in range(1, n):
	s[i] = int(s[i])
	if s[i] >= s[i - 1]:
		t.append(1)
	else:
		t.append(0)
wynik = 1
x = 1
flag = True
while flag:
	for y in range(x):
		suma = 0
		for i in range(y * n, (y + 1) * n):
			suma += t[i]
		if suma == n:
			wynik = n
			flag = False
	x = x * 2
	n = n // 2
print(wynik)


input()
list_ = [int(x) for x in input().split()]

def max_length(list_):
	len_ = len(list_)
	if list_ == sorted(list_):
		return len_
	return max(max_length(list_[:len_ // 2]), max_length(list_[len_ // 2:]))
print(max_length(list_))


n = int(input())
L = list(map(int, input().split()))
l = L[:]
for i in range(len(l)):
	for j in range(i):
		if l[j] > l[j + 1]:
			temp = l[j]
			l[j] = l[j + 1]
			l[j + 1] = temp
while L != l:
	niz1 = True
	niz2 = True
	r = n // 2
	for i in range(1, r):
		if L[i] >= L[i - 1]:
			continue
		else:
			niz1 = False
	for i in range(r + 1, n):
		if L[i] >= L[i - 1]:
			continue
		else:
			niz2 = False
	if niz1 == True and niz2 == False:
		a = r
	elif niz1 == False and niz2 == True:
		a = 0
	else:
		a = 0
	while n > r:
		n -= 1
		L.pop(a)
	l = L[:]
	for i in range(len(l)):
		for j in range(i):
			if l[j] > l[j + 1]:
				temp = l[j]
				l[j] = l[j + 1]
				l[j + 1] = temp
print(len(L))


from math import log

def check_sort(l):
	if sorted(l[:]) == l:
		return True
	else:
		return False
n = int(input())
nums = input().split(' ')
nums = [int(num) for num in nums]
count = 1
not_found = True
length = len(nums)
while not_found:
	d = int(length / count)
	c = 0
	e = d
	for i in range(count):
		temp = nums[c:e]
		if check_sort(temp) == True:
			not_found = False
			break
		(c, e) = (e, e + d)
	else:
		count *= 2
print(int(length / count))


def thanos_sort(a, start, end):
	if start >= end:
		return 1
	elif a[start:end] == sorted(a[start:end]):
		return end - start
	else:
		return max(thanos_sort(a, start, (end + start) // 2), thanos_sort(a, (start + end) // 2, end))
n = int(input())
a = list(map(int, input().split()))
start = 0
end = n
res = thanos_sort(a, start, end)
print(res)


def thanos(lst):
	if sorted(lst) == lst:
		return lst
	else:
		left = thanos(lst[:len(lst) // 2])
		right = thanos(lst[len(lst) // 2:])
		if len(left) > len(right):
			return left
		return right
input()
a = list(map(int, input().split()))
print(len(thanos(a)))


def check(lst):
	global s
	if len(lst) > s:
		(a, b) = ([], [])
		temp = lst[0]
		for i in lst[1:]:
			if i < temp:
				(a, b) = (lst[:len(lst) // 2], lst[len(lst) // 2:])
				check(a)
				check(b)
				break
			temp = i
		else:
			s = len(lst)
n = int(input())
lst = list(map(int, input().split()))
s = 0
check(lst)
print(s)


from sys import stdin
n = int(stdin.readline())
a = list(map(int, stdin.readline().split()))
i = 2
ans = 1
while i <= n:
	j = 0
	while j <= n - i:
		if a[j:j + i] == list(sorted(a[j:j + i])):
			ans = i
		j += i
	i *= 2
print(ans)


def thanos(lst, n):
	if n == 1:
		return 1
	isSorted = True
	for i in range(n - 1):
		if lst[i] > lst[i + 1]:
			isSorted = False
			break
	if isSorted:
		return n
	else:
		return max(thanos(lst[0:n // 2], n // 2), thanos(lst[n // 2:n], n // 2))
a = int(input())
nums = list(map(int, input().split()))
print(thanos(nums, a))


from math import sqrt
N = int(input())
A = list(map(int, input().split()))
I = 0
while I <= sqrt(N):
	for K in range(2 ** I):
		if A[K * N // 2 ** I:(K + 1) * N // 2 ** I] == sorted(A[K * N // 2 ** I:(K + 1) * N // 2 ** I]):
			print(N // 2 ** I)
			I = N
			break
	I += 1


def check_if_sorted(array):
	if len(array) >= 2:
		for i in range(len(array) - 1):
			if array[i] > array[i + 1]:
				return False
	return True

def split_and_check(array):
	global max_len
	if check_if_sorted(array):
		max_len = max(max_len, len(array))
	else:
		pivot = len(array) // 2
		if pivot >= 1:
			left = array[:pivot]
			right = array[pivot:]
			split_and_check(left)
			split_and_check(right)
max_len = -1e+18
n = int(input())
a = [int(i) for i in input().split()]
split_and_check(a)
print(max_len)


from itertools import takewhile
import math
n = int(input())
arr = list(map(int, input().split()))
m = 0

def check(a):
	global m
	if a == sorted(a):
		m = max(m, len(a))
	else:
		p = len(a) // 2
		return check(a[:p]) or check(a[p:])
check(arr)
print(m)


def snap(a):
	if sorted(a) == a:
		return len(a)
	else:
		left = snap(a[len(a) // 2:])
		right = snap(a[:len(a) // 2])
		if left > right:
			return left
		else:
			return right
n = int(input())
a = [int(n) for n in input().strip().split()]
print('{}'.format(snap(a)))


n = int(input())
l = list(map(int, input().rstrip().split()))

def sortedNum(arr):
	if len(l) == 0:
		return 0
	temp = arr[0]
	c = 1
	for _ in arr[1:]:
		if _ < temp:
			break
		c += 1
		temp = _
	return c
while 1:
	res = sortedNum(l)
	if res == len(l):
		print(len(l))
		break
	else:
		left = sortedNum(l[:len(l) // 2])
		right = sortedNum(l[len(l) // 2:])
		if left > right:
			l = l[:len(l) // 2]
		else:
			l = l[len(l) // 2:]


def thanossort(string1, slist):
	while True:
		n = len(string1) // 2
		string1 = string1[n:]
		if n < 1:
			break
		if string1 == sorted(string1):
			slist.append(len(string1))
			break
		else:
			slist.extend(thanossort2(string1, slist))
	return slist

def thanossort2(string2, slist):
	while True:
		n = len(string2) // 2
		string2 = string2[:n]
		if n < 1:
			break
		if string2 == sorted(string2):
			slist.append(len(string2))
			break
		else:
			slist.extend(thanossort(string2, slist))
	return slist
len1 = int(input())
string = list(map(int, input().split()))
string1 = string.copy()
string2 = string.copy()
slist = []
if string == sorted(string):
	slist.append(len(string))
else:
	slist.extend(thanossort(string1, slist))
	slist.extend(thanossort2(string2, slist))
print(max(slist))


n = int(input())
a = list(map(int, input().split()))

def thanos_sort(a, l, r):
	if a[l:r] == sorted(a[l:r]):
		return len(a[l:r])
	else:
		return max(thanos_sort(a, l, (l + r) // 2), thanos_sort(a, (l + r) // 2, r))
print(thanos_sort(a, 0, n))


def tan(a):
	if sorted(a) == a:
		return len(a)
	else:
		buff = tan(a[0:int(len(a) / 2)])
		buff2 = tan(a[int(len(a) / 2):len(a)])
		return max([buff, buff2])
n = input()
q = input().split()
mas = []
for i in range(0, len(q)):
	mas.append(int(q[i]))
print(tan(mas))


import math

def ii():
	return int(input())

def ill():
	return input().split(' ')

def ili():
	return [int(i) for i in input().split(' ')]

def ilis():
	return (int(i) for i in input().split(' '))

def gcd(a, b):
	return a if b == 0 else gcd(b, a % b)

def extgcd(a, b, x=0, y=0):
	if b == 0:
		return (a, 1, 0)
	(d, m, n) = extgcd(b, a % b, x, y)
	return (d, n, m - a // b * n)

def randR(l, h):
	return np.random.randint(l, h)

def issord(arr):
	if len(arr) <= 1:
		return True
	for i in range(1, len(arr)):
		diff = arr[i] - arr[i - 1]
		if diff < 0:
			return False
	return True

def dfs(n, arr):
	if issord(arr):
		return n
	half = n // 2
	if issord(arr[:half]) or issord(arr[half:]):
		return half
	return max(dfs(half, arr[:half]), dfs(half, arr[half:]))

def main():
	n = ii()
	arr = ili()
	print(dfs(n, arr))
main()


import sys

def tanos_sort(A: list):
	for i in range(0, len(A) - 1):
		if A[i] > A[i + 1]:
			k = i
			break
	else:
		print(len(A))
		sys.exit()
	if k >= len(A) // 2:
		print(len(A) // 2)
		sys.exit()
	else:
		tanos_sort(A[len(A) // 2:])
n = int(input())
A = list(map(int, input().split()))
tanos_sort(A)


def main():
	n = int(input())
	a = [int(i) for i in input().split()]
	j = 0
	while n > 1:
		lsort = True
		l_cnt = 0
		r_cnt = 0
		sort = True
		for i in range(n - 1):
			if a[i] > a[i + 1]:
				sort = False
				break
		if sort == True:
			print(n)
			return
		for i in range(j, j + int(n / 2) - 1):
			if a[i] > a[i + 1]:
				lsort = False
				break
			else:
				l_cnt += 1
		rsort = True
		for i in range(j + int(n / 2), j + n - 1):
			if a[i] > a[i + 1]:
				rsort = False
				break
			else:
				r_cnt += 1
		if rsort == False and lsort == False:
			if r_cnt > l_cnt:
				j = int(n / 2)
				n = int(n / 2)
			else:
				n = int(n / 2)
		else:
			n = int(n / 2)
			break
	print(n)
main()


def Thanos_Sort(a, s, e):
	mid = (s + e) // 2
	sort_a = a[s:e + 1]
	sort_a.sort()
	if sort_a == a[s:e + 1]:
		return e - s + 1
	else:
		return max(Thanos_Sort(a, s, mid), Thanos_Sort(a, mid + 1, e))
n = int(input())
a = list(map(int, input().split()))
print(Thanos_Sort(a, 0, n - 1))


def f(x):
	if x == sorted(x):
		return len(x)
	n = len(x)
	return max(f(x[:n // 2]), f(x[n // 2:]))
n = int(input())
x = list(map(int, input().split()))
print(f(x))


n = int(input())
a = list(map(int, input().split(' ')))
max_length = 1

def go_half(str):
	global max_length
	if len(str) > 1:
		temp1 = str[0:int(len(str) / 2)]
		temp2 = str[int(len(str) / 2):int(len(str))]
		if temp1 == sorted(temp1) or temp2 == sorted(temp2):
			max_length = max(len(temp1), max_length)
		else:
			go_half(temp1)
			go_half(temp2)
if a == sorted(a):
	max_length = len(a)
else:
	go_half(a)
print(max_length)


import sys
maxlen = 0

def built_list():
	len_of_arr = int(sys.stdin.readline())
	list_nums = list(map(int, sys.stdin.readline().split()))
	return Thanos_Sort(list_nums)

def Thanos_Sort(list_nums):
	global maxlen
	if sorted(list_nums) == list_nums:
		a = list(list_nums)
		cur_len = len(a)
		if cur_len > maxlen:
			maxlen = cur_len
	elif len(list_nums) > 1:
		return (Thanos_Sort(list_nums[0:len(list_nums) // 2]), Thanos_Sort(list_nums[len(list_nums) // 2:]))
built_list()
print(maxlen)


import math, sys
n = int(input())
s = list(map(int, input().split()))
if len(s) == 1:
	print(1)
else:

	def sort(s):
		for i in range(len(s) - 1):
			if s[i] <= s[i + 1]:
				flag = True
			else:
				flag = False
				break
		return flag
	for i in range(int(math.log2(n))):
		for k in range(2 ** i):
			if sort(s[k * n // 2 ** i:k * n // 2 ** i + n // 2 ** i]):
				print(n // 2 ** i)
				sys.exit()
	print(1)


n = int(input())
li = list(map(int, input().split()))
while 1:
	if li == sorted(li):
		print(len(li))
		break
	if li[0:n // 2] == sorted(li[0:n // 2]):
		li = li[0:n // 2]
	else:
		li = li[n // 2:n]
	n = n // 2


Input = lambda : map(int, input().split())

def is_sort(Arr, n):
	for i in range(1, n):
		if Arr[i] < Arr[i - 1]:
			return False
	return True

def cal(Arr, n):
	MAX = 1
	t = 1
	for i in range(1, n):
		if Arr[i] >= Arr[i - 1]:
			t += 1
		else:
			if t > MAX:
				MAX = t
			t = 1
	return max(MAX, t)
n = int(input())
Arr = list(Input())
while is_sort(Arr, n) == False:
	if n == 1:
		print(1)
		exit()
	a1 = Arr[:n // 2].copy()
	a2 = Arr[n // 2:].copy()
	if cal(a1, n // 2) >= cal(a2, n // 2):
		Arr = a1.copy()
	else:
		Arr = a2.copy()
	n //= 2
print(len(Arr))


n = int(input())
c = list(map(int, input().split()))

def rec(c, n):
	if c == sorted(c):
		return n
	n = n // 2
	return max(rec(c[:n], n), rec(c[n:], n))
print(rec(c, n))


def s(a):
	if sorted(a) == a:
		return len(a)
	k = len(a) // 2
	return max(s(a[:k]), s(a[k:]))
n = int(input())
lenth = n
nums = list(map(int, input().split()))
print(s(nums))


n = map(int, input().split())
a = list(map(int, input().split()))

def check_sorted(a):
	p = 0
	for i in a:
		if p <= i:
			p = i
		else:
			return False
	return True

def tanos_sort(a):
	if len(a) == 0:
		return []
	if check_sorted(a):
		return a
	h = len(a) // 2
	if check_sorted(a[:h]):
		return a[:h]
	if check_sorted(a[h:]):
		return a[h:]
	v1 = tanos_sort(a[:h])
	v2 = tanos_sort(a[h:])
	if len(v1) > len(v2):
		return v1
	else:
		return v2
print(len(tanos_sort(a)))


try:

	def thanossort(l):
		l2 = l.copy()
		if l == sorted(l):
			return len(l)
		elif l == sorted(l2, reverse=True):
			return 1
		else:
			return max(thanossort(l[:int(len(l) / 2)]), thanossort(l[int(len(l) / 2):]))
	t = int(input())
	for i in range(t):
		l = [int(x) for x in input().split()]
		length = thanossort(l)
		print(length)
except:
	pass


def isSorted(list: list):
	if len(list) <= 1:
		return True
	i = 1
	while i < len(list):
		if list[i - 1] > list[i]:
			return False
		i += 1
	return True
end = False
n = int(input())
text = input()
first = list()
for el in text.split(' '):
	first.append(int(el))
if isSorted(first):
	print(len(first))
	end = True
data = list()
data_update = list()
data.append(first)
while not end:
	for l in data:
		a = l[:len(l) // 2]
		b = l[len(l) // 2:]
		if isSorted(a) or isSorted(b):
			print(len(a))
			end = True
			break
		data_update.append(a)
		data_update.append(b)
	data = data_update.copy()


def tell(p):
	a = p[:len(p) // 2]
	b = p[len(p) // 2:]
	aa = sorted(a)
	bb = sorted(b)
	if aa == a:
		return len(a)
	elif bb == b:
		return len(b)
	else:
		i = tell(a)
		j = tell(b)
		s = max(i, j)
		return s
n = int(input())
l = list(map(int, input().split()))
ll = sorted(l)
if ll == l:
	ans = n
else:
	ans = tell(l)
print(ans)


import math
n = int(input())
cl = list(map(int, input().split()))
ln = int(math.log(n, 2))
for i in range(ln + 1):
	pre = 0
	for j in range(0, n + 1, 2 ** (ln - i)):
		if j != pre and cl[pre:j] == sorted(cl[pre:j]):
			print(n // 2 ** i)
			exit()
		pre = j


from itertools import takewhile
import math
n = int(input())
arr = list(map(int, input().split()))

def check(a):
	length = len(a)
	if a == sorted(a):
		return length
	p = length // 2
	return max(check(a[:p]), check(a[p:]))
print(check(arr))


from copy import copy
n = int(input())
v = [int(x) for x in input().strip().split(' ')]

def max_ok(a):
	if len(a) == 1:
		return 1
	m = len(a) // 2
	b = copy(a)
	b.sort()
	if a == b:
		return len(a)
	return max(max_ok(a[:m]), max_ok(a[m:]))
print(max_ok(v))


N = int(input())
n_list = list(map(int, input().split()))
max_size = 0

def search_list(l, n):
	tmp = sorted(l)
	if tmp == l:
		return n
	l_1 = l[:int(n / 2)]
	l_2 = l[int(n / 2):]
	return max(search_list(l_1, n / 2), search_list(l_2, n / 2))
max_size = search_list(n_list, N)
print('%d' % max_size)


n = int(input())
a = []
res = 1

def f(b, e):
	global res
	if b + 1 >= e:
		return
	if sorted(a[b:e]) == a[b:e]:
		res = max(res, e - b)
	f(b, (b + e) // 2)
	f((b + e) // 2, e)
a = list(map(int, input().split()))
f(0, n)
print(res)


N = int(input().strip())
l = list(map(int, input().strip().split()))

def f(i, j):
	if j - i == 1:
		return 1
	arr = l[i:j]
	if arr == sorted(arr):
		return j - i
	m = (i + j) // 2
	return max(f(i, m), f(m, j))
print(f(0, N))


n = input()
array = [int(x) for x in input().split()]

def getarr(arr):
	size = len(arr)
	msize = len(arr)
	maxv = msize
	maxv1 = []
	if size == 1:
		return 1
	else:
		k = 1
		while int(k) < size:
			if arr[int(k)] < arr[int(k) - 1]:
				msize /= 2
				maxv = msize
				maxv1.append(getarr(arr[0:int(msize)]))
				if size - msize >= int(k):
					k += msize - 1
				if msize <= 1:
					maxv = 1
					break
			k += 1
		if maxv1 != []:
			if max(maxv1) > maxv:
				maxv = max(maxv1)
		return maxv
print(int(getarr(array)))


def max_lens_sorted(lens):
	for i in range(0, n, lens):
		new = a[i:i + lens]
		new.sort()
		if new == a[i:i + lens]:
			return lens
	return max_lens_sorted(lens // 2)
n = int(input())
a = [int(s) for s in input().split()]
print(max_lens_sorted(n))


import sys
from collections import defaultdict
strInp = lambda : input().strip().split()
intInp = lambda : list(map(int, strInp()))
n = int(input())
arr = intInp()

def checkSorded(arr):
	last = arr[0]
	Sorted = True
	for i in arr[1:]:
		if i >= last:
			last = i
		else:
			Sorted = False
	return Sorted

def getSorted(arr):
	if checkSorded(arr):
		return len(arr)
	return max(getSorted(arr[0:len(arr) // 2]), getSorted(arr[len(arr) // 2:]))
print(getSorted(arr))


n = int(input())
l = list(map(int, input().split()))

def isSorted(a):
	for i in range(1, len(a)):
		if a[i] < a[i - 1]:
			return False
	return True

def sort(a):
	if isSorted(a):
		return a
	t = len(a) // 2
	a1 = a[:t]
	a2 = a[t:]
	a1 = sort(a1)
	a2 = sort(a2)
	if len(a1) >= len(a2):
		return a1
	else:
		return a2
print(len(sort(l)))


def is_sorted(l):
	for i in range(1, len(l)):
		if l[i] < l[i - 1]:
			return False
	else:
		return True

def thanos_sort(l):
	if is_sorted(l):
		return len(l)
	else:
		half = int(len(l) / 2)
		return max(thanos_sort(l[:half]), thanos_sort(l[half:]))
n = input()
l = list(map(int, input().split()))
print(thanos_sort(l))


def f(a: list):
	if len(a) == 1:
		return
	if sorted(a) == a:
		global m
		m = max(m, len(a))
	f(a[:len(a) // 2])
	f(a[len(a) // 2:])
_ = int(input())
a = [int(x) for x in input().split()]
m = 1
f(a)
print(m)


R = lambda : map(int, input().split())

def thanos(l):
	d = l.copy()
	if l == sorted(d):
		return len(l)
		exit()
	return max(thanos(l[:len(l) // 2]), thanos(l[len(l) // 2:]))
input()
print(thanos([*R()]))


def parse_input():
	_ = input()
	nums = list(map(int, input().split(' ')))
	return nums

def solve(nums):
	n = len(nums)
	if nums == sorted(nums):
		return n
	else:
		return max(solve(nums[:n // 2]), solve(nums[n // 2:]))
nums = parse_input()
print(solve(nums))


def check(arr):
	n = len(arr)
	if n == 0:
		return False
	for i in range(1, n):
		if arr[i] < arr[i - 1]:
			return False
	return True

def find_max_len(arr):
	n = len(arr)
	if check(arr):
		return n
	return max(find_max_len(arr[:n // 2]), find_max_len(arr[n // 2:]))
n = int(input())
nums = list(map(int, input().split()))
print(find_max_len(nums))


import os
import sys
from io import BytesIO, IOBase
BUFSIZE = 8192

class FastIO(IOBase):
	newlines = 0

	def __init__(self, file):
		self._fd = file.fileno()
		self.buffer = BytesIO()
		self.writable = 'x' in file.mode or 'r' not in file.mode
		self.write = self.buffer.write if self.writable else None

	def read(self):
		while True:
			b = os.read(self._fd, max(os.fstat(self._fd).st_size, BUFSIZE))
			if not b:
				break
			ptr = self.buffer.tell()
			(self.buffer.seek(0, 2), self.buffer.write(b), self.buffer.seek(ptr))
		self.newlines = 0
		return self.buffer.read()

	def readline(self):
		while self.newlines == 0:
			b = os.read(self._fd, max(os.fstat(self._fd).st_size, BUFSIZE))
			self.newlines = b.count(b'\n') + (not b)
			ptr = self.buffer.tell()
			(self.buffer.seek(0, 2), self.buffer.write(b), self.buffer.seek(ptr))
		self.newlines -= 1
		return self.buffer.readline()

	def flush(self):
		if self.writable:
			os.write(self._fd, self.buffer.getvalue())
			(self.buffer.truncate(0), self.buffer.seek(0))

class IOWrapper(IOBase):

	def __init__(self, file):
		self.buffer = FastIO(file)
		self.flush = self.buffer.flush
		self.writable = self.buffer.writable
		self.write = lambda s: self.buffer.write(s.encode('ascii'))
		self.read = lambda : self.buffer.read().decode('ascii')
		self.readline = lambda : self.buffer.readline().decode('ascii')
(sys.stdin, sys.stdout) = (IOWrapper(sys.stdin), IOWrapper(sys.stdout))
input = lambda : sys.stdin.readline().rstrip('\r\n')
n = int(input())
s = list(map(int, input().split()))
import math
e = int(math.log(n, 2))
ind = 1
for i in range(e):
	g = 0
	for j in range(2 ** i):
		g = 0
		for k in range(1, n // 2 ** i):
			if s[j * (n // 2 ** i) + k] < s[j * (n // 2 ** i) + k - 1]:
				g = 1
				break
		if g == 0:
			ind = max(ind, n // 2 ** i)
			break
print(ind)


def qsort(array):
	less = []
	equal = []
	greater = []
	if len(array) > 1:
		pivot = array[0]
		for x in array:
			if x < pivot:
				less.append(x)
			elif x == pivot:
				equal.append(x)
			elif x > pivot:
				greater.append(x)
		return qsort(less) + equal + qsort(greater)
	else:
		return array

def convert_str_to_listInt(string):
	li = list(string.split(' '))
	li = list(map(int, li))
	return li

def main(a, b):
	if b == qsort(b):
		return len(b)
	if b == qsort(b)[::-1]:
		return 1
	left = b[:a // 2]
	right = b[a // 2:a]
	a = tanos_sort(left)
	b = tanos_sort(right)
	return a if a > b else b

def tanos_sort(part):
	if part == qsort(part):
		if len(part) is not 1:
			count = len(part)
			return count
		else:
			return 1
	else:
		left = part[:len(part) // 2]
		right = part[len(part) // 2:len(part)]
		a = tanos_sort(left)
		b = tanos_sort(right)
		return a if a > b else b
a = input()
b = input()
print(main(int(a), convert_str_to_listInt(b)))


def isSorted(liste):
	for i in range(0, len(liste) - 1):
		if liste[i] > liste[i + 1]:
			return False
	return True

def noorIsNotHere(liste):
	if isSorted(liste):
		return len(liste)
	liste1 = liste[:len(liste) // 2]
	liste2 = liste[len(liste) // 2:]
	k = isSorted(liste1)
	l = isSorted(liste2)
	if k and l:
		if len(liste1) > len(liste2):
			return len(liste1)
		else:
			return len(liste2)
	elif k:
		return len(liste1)
	elif l:
		return len(liste2)
	else:
		a = noorIsNotHere(liste1)
		b = noorIsNotHere(liste2)
		if a > b:
			return a
		else:
			return b
n = int(input())
liste = list(map(int, input().split()))
print(noorIsNotHere(liste))


def sorting(n, arr):
	r = False
	for i in range(n - 1):
		if arr[i + 1] < arr[i]:
			r = True
			break
	if r:
		l1 = sorting(int(n / 2), arr[0:int(n / 2)])
		l2 = sorting(int(n / 2), arr[int(n / 2):])
		if len(l1) > len(l2):
			return l1
		else:
			return l2
	else:
		return arr
n = int(input())
a = [int(x) for x in input().split()]
print(len(sorting(n, a)))


def solve(a, n1, n2):
	if a[n1:n2] == sorted(a[n1:n2]) or n1 == n2 or n1 == n2 - 1:
		return len(a[n1:n2])
	else:
		return max(solve(a, n1, (n1 + n2) // 2), solve(a, (n1 + n2) // 2, n2))
n = int(input())
a = [int(x) for x in input().split()]
print(solve(a, 0, n))


def check(cur_list):
	return len(cur_list) if all((cur_list[i] <= cur_list[i + 1] for i in range(len(cur_list) - 1))) else 0

def thanos(cur_list):
	ans = max(check(cur_list[:len(cur_list) // 2]), check(cur_list[len(cur_list) // 2:]))
	return ans if ans > 0 else max(thanos(cur_list[:len(cur_list) // 2]), thanos(cur_list[len(cur_list) // 2:]))
n = input()
a = list(map(int, input().split()))
print(max(check(a), thanos(a)))


a = int(input())
n = list(map(int, input().split()))
x = a
p = 0
while x > 0 and p == 0:
	s = 0
	i = 0
	j = x
	while j <= a:
		d = n[i:j]
		if d == sorted(d):
			print(x)
			p = 1
			break
		i += x
		j += x
	x = x // 2


input()
arrays = [[int(x) for x in input().split(' ')]]

def main(arrays):
	while True:
		curr = arrays
		for (i, elem) in enumerate(curr):
			if sorted(elem) == elem:
				return len(elem)
			else:
				arrays.append(elem[len(elem) // 2:])
				arrays.append(elem[:len(elem) // 2])
print(main(arrays))


def sort_num(arr, n, f):
	x = n // f
	temp = []
	i = 0
	while i < n:
		temp.append(arr[i:i + x])
		i = i + x
	for i in temp:
		if i == sorted(i):
			print(x)
			return
	sort_num(arr, n, f * 2)
n = int(input())
arr = list(map(int, input().split()))
if arr == sorted(arr):
	print(n)
else:
	sort_num(arr, n, 2)


n = int(input())
a = list(map(int, input().split()))
ans = 1
k = 2
while k <= n:
	for i in range(0, n, k):
		if sorted(a[i:i + k]) == a[i:i + k]:
			ans = max(ans, k)
	k *= 2
print(ans)


n = int(input().strip())
arr = [int(x) for x in input().split(' ')]

def thanos(s):
	if len(s) < 2:
		return len(s)
	elif '_'.join([str(x) for x in list(sorted(s))]) == '_'.join([str(x) for x in s]):
		return len(s)
	else:
		n = int(len(s) / 2)
		return max(thanos(s[0:n]), thanos(s[n:len(s)]))
print(thanos(arr))


ans = 1

def solve(a):
	global ans
	count = 0
	if len(a) == 1:
		return 1
	for i in range(len(a) - 1):
		if a[i] <= a[i + 1]:
			count += 1
	if count == len(a) - 1:
		ans = max(ans, len(a))
	t = len(a) // 2
	solve(a[:t])
	solve(a[t:])
n = int(input())
a = list(map(int, input().split()))
solve(a)
print(ans)


def solve(beg, end):
	while not breaks[beg] == breaks[end]:
		n = int((beg + end) / 2)
		c1 = breaks[n] - breaks[beg]
		c2 = breaks[end] - breaks[n + 1]
		if c1 > c2:
			beg = n + 1
		elif c1 < c2:
			end = n
		else:
			(b1, e1) = solve(beg, n)
			(b2, e2) = solve(n + 1, end)
			if e2 - b2 > e1 - b1:
				return (b2, e2)
			return (b1, e1)
	return (beg, end)
n = int(input())
arr = list(map(int, input().split()))
breaks = [0]
for i in range(1, n):
	if arr[i] < arr[i - 1]:
		breaks.append(breaks[i - 1] + 1)
	else:
		breaks.append(breaks[i - 1])
(b, e) = solve(0, n - 1)
print(e - b + 1)


n = int(input())
ar = list(map(int, input().split(' ')))

def checksort(a):
	if a == sorted(a):
		return True
	else:
		return False
if n == 1:
	print(1)
if n == 2:
	if checksort(ar):
		print(2)
	else:
		print(1)
if n == 4:
	if checksort(ar):
		print(4)
	elif checksort(ar[:2]) or checksort(ar[2:4]):
		print(2)
	else:
		print(1)
if n == 8:
	if checksort(ar):
		print(8)
	elif checksort(ar[:4]) or checksort(ar[4:8]):
		print(4)
	elif checksort(ar[:2]) or checksort(ar[2:4]) or checksort(ar[4:6]) or checksort(ar[6:8]):
		print(2)
	else:
		print(1)
if n == 16:
	if checksort(ar):
		print(16)
	elif checksort(ar[:8]) or checksort(ar[8:16]):
		print(8)
	elif checksort(ar[:4]) or checksort(ar[4:8]) or checksort(ar[8:12]) or checksort(ar[12:16]):
		print(4)
	elif checksort(ar[:2] or checksort(ar[2:4]) or checksort(ar[4:6]) or checksort(ar[6:8]) or checksort(ar[8:10]) or checksort(ar[10:12]) or checksort(ar[12:14]) or checksort(ar[14:16])):
		print(2)
	else:
		print(1)


N = int(input())
arr = list(map(int, input().split()))
while True:
	(c, l) = (0, 0)
	t = N
	while t <= len(arr):
		if sorted(arr[c:t]) == arr[c:t]:
			l = len(arr[c:t])
			break
		(c, t) = (t, t + N)
	if l >= 1:
		print(l)
		break
	N = N // 2


def check(a):
	if len(a) == 1:
		return 1
	if a == sorted(a):
		return len(a)
	l = a[:int(len(a) / 2)]
	r = a[int(len(a) / 2):]
	return max(check(l), check(r))
g = int(input())
a = list(map(int, input().split(' ')))
print(check(a))


a = int(input())
c = a
s = [int(x) for x in input().split()]
key = False
while c != 1:
	for i in range(0, a, c):
		if s[i:i + c] == sorted(s[i:i + c]):
			key = True
	if key:
		print(c)
		break
	c //= 2
if not key:
	print(1)


def tanos(arr):
	if len(arr) == 1:
		return 1
	dup = arr[:]
	dup.sort()
	if dup == arr:
		return len(arr)
	else:
		return tanos(arr[:len(arr) // 2])
n = int(input())
l = list(map(int, str(input()).split()))
a = l.copy()
a.sort()
if l == a:
	print(len(a))
elif l == a[::-1]:
	print(1)
else:
	left = tanos(l[:len(l) // 2])
	right = tanos(l[len(l) // 2:])
	print(max(left, right))


def cek(arr):
	if arr == sorted(arr):
		return len(arr)
	else:
		return max(cek(arr[:len(arr) // 2]), cek(arr[len(arr) // 2:]))
n = int(input())
seq = list(map(int, input().split()))
print(cek(seq))


def fu(a):
	d = True
	for i in range(1, len(a)):
		if a[i - 1] > a[i]:
			d = False
			break
	if d:
		return len(a)
	return max(fu(a[:len(a) // 2]), fu(a[len(a) // 2:]))
n = int(input())
l = [int(x) for x in input().split()]
print(fu(l))


from sys import stdin
from typing import List, Optional

def is_sorted(li: List[int]) -> bool:
	last: Optional[int] = None
	for n in li:
		sorted = True
		if last is not None and n < last:
			sorted = False
		last = n
		if not sorted:
			return False
	return True

def get_longest(a: List[int], b: List[int]) -> List[int]:
	if len(b) > len(a):
		return b
	return a

def sort(li: List[int]) -> List[int]:
	if is_sorted(li):
		return li
	half_length = int(len(li) / 2)
	left_sorted = sort(li[:half_length])
	right_sorted = sort(li[half_length:])
	return get_longest(left_sorted, right_sorted)
stdin.readline()
input_list = [int(s) for s in stdin.readline().split(' ')]
print(len(sort(input_list)))


def sorted(nums):
	for i in range(len(nums)):
		if i == 0 or nums[i] >= nums[i - 1]:
			continue
		return False
	return True
n = int(input())
nums = input().split()
for i in range(n):
	nums[i] = int(nums[i])
	num_lists = []
	num_lists.append(nums)
max_len = 0
while len(num_lists) != 0:
	cur_nums = num_lists.pop(0)
	if len(cur_nums) == 0 or len(cur_nums) == 1:
		continue
	if sorted(cur_nums) and len(cur_nums) > max_len:
		max_len = len(cur_nums)
		continue
	first_half = cur_nums[:int(len(cur_nums) / 2)]
	sec_half = cur_nums[int(len(cur_nums) / 2):]
	if len(first_half) != 0:
		num_lists.append(first_half)
	if len(sec_half) != 0:
		num_lists.append(sec_half)
if max_len == 0:
	max_len = 1
print(max_len)


def is_sorted(arr, n):
	i = 0
	count = 1
	l = []
	while i < n - 1:
		if arr[i] <= arr[i + 1]:
			count += 1
			l.append(count)
		else:
			count = 1
			l.append(1)
		i += 1
	return max(l)

def thanos_sort(arr, n):
	if len(arr) == 1:
		return 1
	elif is_sorted(arr, n) == n:
		return n
	else:
		return max(thanos_sort(arr[0:n // 2], n // 2), thanos_sort(arr[n // 2:n], n // 2))
m = int(input())
string_input = list(map(int, input().split()))
print(thanos_sort(string_input, m))


n = int(input())
m = list(map(int, input().split()))
k = 0
if m == sorted(m):
	print(n)
	exit()

def half(m, n, k):
	m1 = m[:n // 2]
	m2 = m[n // 2:]
	if sorted(m1) == m1 or sorted(m2) == m2:
		k = max(k, n // 2)
	if n // 2 != 0:
		k = half(m1, n // 2, k)
		k = half(m2, n // 2, k)
	return k
k = half(m, n, k)
print(k)


n = int(input())
arr = list(map(int, input().split(' ')))
d = 1
k = 0
while n != 1:
	j = 0
	for i in range(int(len(arr) / n)):
		a = arr[j:j + n]
		test = a[:]
		test.sort()
		if test == a:
			k = len(a)
			if k > d:
				d = k
				if d == n:
					break
		j += n
	if d == n:
		break
	else:
		n = int(n / 2)
print(d)


n = int(input())
sp = list(map(int, input().split()))
max_length = 0

def check_sorted(array):
	global max_length
	if array == sorted(array):
		if len(array) > max_length:
			max_length = len(array)
	else:
		check_sorted(array[:len(array) // 2])
		check_sorted(array[len(array) // 2:])
check_sorted(sp)
print(max_length)


n = int(input())
array = input().split()
array = list(map(lambda x: int(x) if x.isdigit() else 0, array))

def ktra(array, l, h):
	for i in range(l, h):
		if array[i] > array[i + 1]:
			return 0
	return 1

def thanos(array, l, h):
	if l <= h:
		if ktra(array, l, h):
			return h - l + 1
		return max(thanos(array, l, int((l + h) / 2)), thanos(array, int((l + h) / 2) + 1, h))
print(thanos(array, 0, n - 1))


n = int(input())
a = list(map(int, input().split()))

def snap_first_half(a):
	if all((a[i] <= a[i + 1] for i in range(len(a) - 1))):
		return len(a)
	else:
		l = len(a) // 2
		return max(snap_first_half(a[l:]), snap_second_half(a[l:]))

def snap_second_half(a):
	if all((a[i] <= a[i + 1] for i in range(len(a) - 1))):
		return len(a)
	else:
		l = len(a) // 2
		return max(snap_first_half(a[:l]), snap_second_half(a[:l]))
print(max(snap_first_half(a), snap_second_half(a)))


def t(a):
	if sorted(a) == a:
		yield len(a)
	else:
		yield from t(a[:len(a) // 2])
		yield from t(a[len(a) // 2:])
input()
a = list(map(int, input().split()))
print(max(t(a)))


def solve(l):
	n = len(l)
	if n == 1:
		return 1
	a = solve(l[:n // 2])
	b = solve(l[n // 2:])
	if a == b == n // 2 and l[n // 2] >= l[n // 2 - 1]:
		return n
	else:
		return max(a, b)
n = int(input())
l = [int(i) for i in input().split()]
print(solve(l))


m = n = int(input())
a = [*map(int, input().split())]

def main(size, arr):
	if arr == sorted(arr):
		return arr
	else:
		f = main(size // 2, arr[:size // 2])
		l = main(size // 2, arr[size // 2:])
		if len(f) > len(l):
			return f
		else:
			return l
print(len(main(m, a)))


from copy import copy
n = int(input())
A = list(map(int, input().split()))

def test(V):

	def isSorted(V):
		for i in range(1, len(V)):
			if V[i - 1] > V[i]:
				return False
		return True
	if isSorted(V):
		return V
	x1 = test(V[:len(V) // 2])
	x2 = test(V[len(V) // 2:])
	return x1 if len(x1) > len(x2) else x2
print(len(test(A)))


n = int(input())
a1 = [int(i) for i in input().split()]
c = []
k1 = len(a1)
b = sorted(a1)
if b == a1:
	c += [k1]
else:
	k2 = k1 // 2
	a2 = a1[0:k2]
	b = sorted(a2)
	a3 = a1[k2:]
	b1 = sorted(a3)
	if b == a2 or b1 == a3:
		c += [k2]
	else:
		k3 = k2 // 2
		a4 = a2[0:k3]
		a5 = a2[k3:]
		a6 = a3[0:k3]
		a7 = a3[k3:]
		b2 = sorted(a4)
		b3 = sorted(a5)
		b4 = sorted(a6)
		b5 = sorted(a7)
		if b2 == a4 or b3 == a5 or b4 == a6 or (b5 == a7):
			c += [k3]
		else:
			k4 = k3 // 2
			a8 = a4[0:k4]
			a9 = a4[k4:]
			a10 = a5[0:k4]
			a11 = a5[k4:]
			a12 = a6[0:k4]
			a13 = a6[k4:]
			a14 = a7[0:k4]
			a15 = a7[k4:]
			b6 = sorted(a8)
			b7 = sorted(a9)
			b8 = sorted(a10)
			b9 = sorted(a11)
			b10 = sorted(a12)
			b11 = sorted(a13)
			b12 = sorted(a14)
			b13 = sorted(a15)
			if b6 == a8 or b7 == a9 or b8 == a10 or (b9 == a11) or (b10 == a12) or (b11 == a13) or (b12 == a14) or (b13 == a15):
				c += [k4]
			else:
				c += [1]
print(max(c))


t = int(input())
listte = list(map(int, input().split()))

def issorted(liste):
	if liste != sorted(liste):
		return max(issorted(liste[:len(liste) // 2]), issorted(liste[len(liste) // 2:]))
	else:
		return len(liste)
print(issorted(listte))


n = int(input())
l = [*map(int, input().split())]
res = 0

def dnc(a, b):
	global res
	inc = True
	for i in range(a, b):
		if l[i] > l[i + 1]:
			inc = False
			break
	if inc:
		res = max(res, b - a + 1)
	else:
		mid = (a + b) // 2
		dnc(a, mid)
		dnc(mid + 1, b)
dnc(0, n - 1)
print(res)


a = int(input())
A = [int(i) for i in input().split()]
B = []
p = 0
n = 0
b = 2
h = a // 2
M = []
j = 2
c = 1
while a > 1:
	a = a // 2
	p += 1
for i in range(p):
	for z in range(1, h + 1):
		for x in range(j, 0, -1):
			M.append(A[z * j - x])
		B = sorted(M)
		if M == B:
			c = len(M)
		M = []
	h = h // 2
	j = j * 2
print(c)


info = []
info.append(input())
info.append(input())
thanosList = []
thanosList = list(map(int, info[1].split()))

def is_sorted(l):
	a = 0
	for i in l:
		if a > i:
			return False
		a = i
	return True

def thanos_sort(list):
	if is_sorted(list):
		return len(list)
	else:
		return max(thanos_sort(list[:len(list) // 2]), thanos_sort(list[len(list) // 2:]))
print(thanos_sort(thanosList))


def thanosSort(lis):
	n = len(lis)
	if lis == sorted(lis):
		return len(lis)
	else:
		left = lis[:n // 2]
		right = lis[n // 2:]
		leftLEN = thanosSort(left)
		rightLEN = thanosSort(right)
	if leftLEN > rightLEN:
		return leftLEN
	else:
		return rightLEN
n = int(input())
nums = list(map(int, input().split()))
print(thanosSort(nums))


n = int(input())
pn = list(map(int, input().split()))

def tanos(ans):
	sort = True
	for i in range(1, len(ans)):
		if ans[i] < ans[i - 1]:
			sort = False
	if sort == True:
		return len(ans)
	if sort == False:
		return max(tanos(ans[:len(ans) // 2]), tanos(ans[len(ans) // 2:]))
print(tanos(pn))


def isSorted(lst):
	if len(lst) <= 1:
		return True
	for i in range(len(lst) - 1):
		if lst[i] > lst[i + 1]:
			return False
	return True

def thanos(lst):
	if isSorted(lst):
		return len(lst)
	n = len(lst)
	half = int(n / 2)
	return max(thanos(lst[0:half]), thanos(lst[half:]))

def main():
	n = int(input())
	lst = [int(i) for i in input().split(' ')]
	print(thanos(lst))
main()


def thanossort(list, n):
	if list == sorted(list):
		return n
	k = n // 2
	return max(thanossort(list[:k], k), thanossort(list[k:], k))
a = int(input())
list = list(map(int, input().split()))
result = thanossort(list, a)
print(result)


n = int(input())
a = [0] + list(map(int, input().split()))
p = 1

def srt(l, r):
	if l >= r:
		return
	bo = True
	for i in range(l, r):
		if a[i] > a[i + 1]:
			bo = False
			break
	global p
	if bo:
		p = max(p, r - l + 1)
	mid = (l + r) // 2
	srt(l, mid)
	srt(mid + 1, r)
srt(1, n)
print(p)


n = int(input())
t = list(map(int, input().split()))

def sorted(l):
	return all((l[i] <= l[i + 1] for i in range(len(l) - 1)))
lists = []

def add(l):
	global lists
	lists.append(l)
	if len(l) > 1:
		add(l[:len(l) // 2])
		add(l[len(l) // 2:])
add(t)
lists.sort(key=lambda l: len(l), reverse=True)
for l in lists:
	if sorted(l):
		print(len(l))
		break


def thanos(a, n):
	b = a[:]
	b.sort()
	if b == a:
		return len(a)
	else:
		c = a[0:n // 2]
		d = a[n // 2:n]
		return max(thanos(c, len(c)), thanos(d, len(d)))
n = int(input())
a = list(map(int, input().split()))
print(thanos(a, n))


def mlo(l, r):
	global a
	if r - l == 1:
		return 1
	if a[l:r] == sorted(a[l:r]):
		return r - l
	else:
		return max(mlo(l, (l + r) // 2), mlo((l + r) // 2, r))
n = int(input())
a = list(map(int, input().split()))
print(mlo(0, n))


n = int(input())
lis = list(map(int, input().split()))
x = n
res = 0
while x >= 1 and res == 0:
	for i in range(n // x):
		arr = lis[i * x:(i + 1) * x]
		if arr == sorted(arr):
			res = x
			x = 0
			break
	x //= 2
print(res)


def best(lis):
	if lis == list(sorted(lis)):
		return len(lis)
	return max([best(lis[0:len(lis) // 2]), best(lis[len(lis) // 2:len(lis)])])
x = int(input())
print(best([int(l) for l in input().split()]))


n = int(input())
a = [int(s) for s in input().split()]

def is_sorted(l, r):
	for i in range(l + 1, r):
		if a[i] < a[i - 1]:
			return False
	return True

def check(l, r):
	if is_sorted(l, r):
		return r - l
	else:
		return max(check(l, (l + r) // 2), check((l + r) // 2, r))
ans = check(0, n)
print(ans)


from sys import exit
n = int(input())
arr = [int(x) for x in input().split()]
if n == 1:
	print(1)
else:
	for i in (16, 8, 4, 2):
		if i > n:
			continue
		for k in range(0, n, i):
			if sorted(arr[k:k + i]) == arr[k:k + i]:
				print(i)
				exit()
	print(1)
	exit()


import sys
cn = n = int(input())
arr = [int(x) for x in input().split()]
while cn > 1:
	start_index = 0
	end_index = cn
	while start_index != n:
		valid = True
		for i in range(start_index + 1, end_index):
			if arr[i - 1] > arr[i]:
				valid = False
				break
		if valid:
			print(cn)
			sys.exit()
		start_index = start_index + cn
		end_index = end_index + cn
	cn = cn >> 1
print(1)


R = lambda : map(int, input().split())
n = int(input())
L = list(R())
p = n
while p >= 1:
	for i in range(0, n, p):
		if L[i:i + p] == sorted(L[i:i + p]):
			print(p)
			quit()
	p //= 2


def max(a, b):
	if a > b:
		return a
	else:
		return b

def is_sort(l, r, a):
	i = l + 1
	while i <= r:
		if a[i] < a[i - 1]:
			return False
		i += 1
	return True

def dfs(l, r, a):
	if l >= r:
		return 1
	if is_sort(l, r, a):
		return r - l + 1
	mid = (l + r) // 2
	return max(dfs(l, mid, a), dfs(mid + 1, r, a))
n = int(input())
a = input().split(' ')
b = []
for i in a:
	b.append(int(i))
print(dfs(0, n - 1, b))


n = int(input())
numbers = list(map(int, input().split()))
while n > 1:
	finish = False
	for i in range(len(numbers) // n):
		if numbers[n * i:n * (i + 1)] == sorted(numbers[n * i:n * (i + 1)]):
			finish = True
			break
	if finish:
		break
	else:
		n = n // 2
print(n)


mex = 0

def shit(a, n):
	if n == 1:
		global mex
		mex = max(mex, 1)
		return
	if a[:n // 2] == sorted(a[:n // 2]) or a[n // 2:] == sorted(a[n // 2:]):
		mex
		mex = max(mex, n // 2)
	shit(a[:n // 2], n // 2)
	shit(a[n // 2:], n // 2)
n = int(input())
a = [int(x) for x in input().split()]
if a == sorted(a):
	print(n)
	exit()
shit(a, n)
print(mex)


def chk(l1, l2):
	global ans
	if l1 == sorted(l2):
		ans = max(ans, len(l1))
		return
	l = []
	r = []
	for i in range(len(l1) // 2):
		l.append(l1[i])
		r.append(l1[i + len(l1) // 2])
	chk(l, l)
	chk(r, r)
	return
n = int(input())
m = list(map(int, input().split()))
ans = 1
chk(m, m)
print(ans)


i = lambda : map(int, input().split())
(n,) = i()
a = list(i())
while n != 1:
	for i in range(0, len(a), n):
		if a[i:i + n] == sorted(a[i:i + n]):
			print(len(a[i:i + n]))
			exit()
	n //= 2
if n == 1:
	print(1)


def is_sorted(a):
	for i in range(len(a) - 1):
		if a[i] > a[i + 1]:
			return False
	return True

def thanos_sort(a):
	if is_sorted(a):
		return len(a)
	left_result = thanos_sort(a[:len(a) // 2])
	right_result = thanos_sort(a[len(a) // 2:])
	return max(left_result, right_result)
n = int(input())
s = list(map(int, input().split()))
print(thanos_sort(s))


def thanos(arr, n):
	if n == 1:
		return 1
	if sorted(arr) == arr:
		return n
	else:
		a = thanos(arr[:n // 2], n // 2)
		b = thanos(arr[n // 2:], n // 2)
	return max(a, b)
n = int(input())
arr = list(map(int, input().split()))
m = 1
print(thanos(arr, n))


def is_sorted(numbers):
	for i in range(len(numbers)):
		if i == 0 or numbers[i] >= numbers[i - 1]:
			continue
		return False
	return True
n = int(input())
nums = input().split()
for i in range(n):
	nums[i] = int(nums[i])
num_lists = [nums]
max_len = 0
while len(num_lists) != 0:
	cur_nums = num_lists.pop(0)
	if len(cur_nums) == 0:
		continue
	if is_sorted(cur_nums):
		if len(cur_nums) > max_len:
			max_len = len(cur_nums)
		continue
	num_lists.append(cur_nums[:int(len(cur_nums) / 2)])
	num_lists.append(cur_nums[int(len(cur_nums) / 2):])
print(max_len)


import sys
import collections
import heapq
n = int(input().strip())
a = [int(i) for i in input().strip().split()]

def check(d):
	if sorted(d) == d:
		return len(d)
	m = len(d) // 2
	return max(check(d[:m]), check(d[m:]))
print(check(a))


def tanos_sort(mas):
	count = 1
	for i in range(0, len(mas) - 1):
		if mas[i] <= mas[i + 1]:
			count += 1
		elif i >= len(mas) // 2:
			return len(mas) // 2
		elif i < len(mas) // 2:
			return 0
	return count

def recurs_sort(mas):
	result = tanos_sort(mas)
	if not result == 0:
		return result
	res1 = recurs_sort(mas[:len(mas) // 2])
	res2 = recurs_sort(mas[len(mas) // 2:])
	return max(res1, res2)
n = int(input())
mas = list(map(int, input().split()))
print(recurs_sort(mas))


def count_arr_num(arr, n):
	i = 0
	for i in range(n):
		i += 1
	return i

def sorting(arr, c):
	if c == 1:
		return True
	i = 0
	for i in range(c - 1):
		if arr[i] > arr[i + 1]:
			return False
		i += 1
	return True

def check(arr, n):
	if sorting(arr, n):
		return count_arr_num(arr, n)
	else:
		n = n // 2
		arr1 = arr[:n]
		arr2 = arr[n:]
		i = check(arr1, n)
		j = check(arr2, n)
		if i > j:
			return i
		else:
			return j
from array import array
arr = array('i', [])
n = int(input())
i = 0
x = [int(x) for x in input().split()]
arr.extend(x)
i = check(arr, n)
print(i)


n = int(input())
numbers = list(map(int, input().split(' ')))
max = 0

def thanosSort(array):
	global max
	z = len(array)
	sorted = True
	for i in range(z):
		if i + 1 < z and array[i + 1] < array[i]:
			thanosSort(array[0:z // 2])
			thanosSort(array[z // 2:z])
			sorted = False
			break
	if sorted and z > max:
		max = z
thanosSort(numbers)
print(max)


from queue import Queue
n = int(input())
queue = Queue()
queue.put(list(map(int, input().split())))
while not queue.empty():
	nums = queue.get()
	if sorted(nums) == nums:
		result = nums
		break
	l = len(nums)
	(p1, p2) = (nums[:int(l / 2)], nums[int(l / 2):])
	queue.put(p1)
	queue.put(p2)
print(len(result))


def is_sort(a):
	for i in range(len(a) - 1):
		if a[i] > a[i + 1]:
			return False
	return True

def t_sort(m, n):
	if is_sort(m):
		return n
	n = int(n / 2)
	a = t_sort(m[:n], n)
	b = t_sort(m[n:], n)
	return max(a, b)

def main():
	n = int(input())
	a = [int(elem) for elem in input().split(' ')]
	print(t_sort(a, n))
main()


a = int(input())
b = list(map(int, input().split()))

def func(q, w):
	n = w - q
	if sorted(b[q:w]) == b[q:w]:
		return n
	else:
		m = (w + q) // 2
		return max(func(q, m), func(m, w))
print(func(0, a))


import sys
import os
from io import BytesIO, IOBase

def ceil(n, k):
	return n // k + (n % k != 0)

def ii():
	return int(input())

def mi():
	return map(int, input().split())

def li():
	return list(map(int, input().split()))

def lcm(a, b):
	return abs(a * b) // math.gcd(a, b)

def prr(a, sep=' '):
	print(sep.join(map(str, a)))

def dd():
	return defaultdict(int)

def ddl():
	return defaultdict(list)

def ddd():
	return defaultdict(defaultdict(int))
BUFSIZE = 8192

class FastIO(IOBase):
	newlines = 0

	def __init__(self, file):
		self._fd = file.fileno()
		self.buffer = BytesIO()
		self.writable = 'x' in file.mode or 'r' not in file.mode
		self.write = self.buffer.write if self.writable else None

	def read(self):
		while True:
			b = os.read(self._fd, max(os.fstat(self._fd).st_size, BUFSIZE))
			if not b:
				break
			ptr = self.buffer.tell()
			(self.buffer.seek(0, 2), self.buffer.write(b), self.buffer.seek(ptr))
		self.newlines = 0
		return self.buffer.read()

	def readline(self):
		while self.newlines == 0:
			b = os.read(self._fd, max(os.fstat(self._fd).st_size, BUFSIZE))
			self.newlines = b.count(b'\n') + (not b)
			ptr = self.buffer.tell()
			(self.buffer.seek(0, 2), self.buffer.write(b), self.buffer.seek(ptr))
		self.newlines -= 1
		return self.buffer.readline()

	def flush(self):
		if self.writable:
			os.write(self._fd, self.buffer.getvalue())
			(self.buffer.truncate(0), self.buffer.seek(0))

class IOWrapper(IOBase):

	def __init__(self, file):
		self.buffer = FastIO(file)
		self.flush = self.buffer.flush
		self.writable = self.buffer.writable
		self.write = lambda s: self.buffer.write(s.encode('ascii'))
		self.read = lambda : self.buffer.read().decode('ascii')
		self.readline = lambda : self.buffer.readline().decode('ascii')
(sys.stdin, sys.stdout) = (IOWrapper(sys.stdin), IOWrapper(sys.stdout))
input = lambda : sys.stdin.readline().rstrip('\r\n')
from collections import defaultdict

def fun(a):
	if sorted(a) == a:
		return len(a)
	return max(fun(a[:len(a) // 2]), fun(a[len(a) // 2:]))
for _ in range(1):
	n = ii()
	a = li()
	print(fun(a))


def Thanos(tab):
	x = len(tab)
	if x == 1:
		return 1
	for i in range(1, x):
		if tab[i] < tab[i - 1]:
			return max(Thanos(tab[:x // 2]), Thanos(tab[x // 2:]))
	return x
n = int(input())
a = [int(x) for x in input().split()]
print(Thanos(a))


import math
N = int(input())
s = [int(x) for x in input().split()]
flag = 0
for i in range(int(math.log(N, 2)), -1, -1):
	temp = 2 ** i
	for j in range(0, len(s), temp):
		h = s[j:j + temp]
		if sorted(h) == h:
			print(len(h))
			flag = 1
			break
	if flag == 1:
		break


n = int(input())
a = [[int(k) for k in input().split()]]
flag = [sorted(k) == k for k in a]
while sum(flag) == 0:
	b = []
	n //= 2
	for k in a:
		b.append(k[:n])
		b.append(k[n:])
	a = b
	flag = [sorted(k) == k for k in a]
print(n)


def thanos_sort(l):
	if l == sorted(l) or len(l) <= 1:
		return len(l)
	mid = int(len(l) / 2)
	return max(thanos_sort(l[:mid]), thanos_sort(l[mid:]))
_ = int(input())
l = list(map(int, input().split()))
print(thanos_sort(l))


n = int(input())
a = list(map(int, input().split()))

def check(a):
	if a == sorted(a):
		return len(a)
	size = int(len(a) // 2)
	while size > 1:
		for part in range(int(len(a) // size)):
			start = part * size
			end = (part + 1) * size
			if a[start:end] == sorted(a[start:end]):
				return size
		size = int(size // 2)
	return 1
print(check(a))


def check_sort(a, p, r):
	for i in range(p, r):
		if a[i] > a[i + 1]:
			return False
	return True

def thanos_sort(a, p, r):
	global max_len
	if p < r:
		if not check_sort(a, p, r):
			q = int((p + r) / 2)
			thanos_sort(a, p, q)
			thanos_sort(a, q + 1, r)
			return
		elif r - p + 1 > max_len:
			max_len = r - p + 1
			return
max_len = 1
input_n = int(input())
input_numbers = [int(x) for x in input().split()]
thanos_sort(input_numbers, 0, input_n - 1)
print(max_len)


N = int(input())
a = list(map(int, input().split()))
if a == sorted(a):
	print(N)
elif a[:N // 2] == sorted(a[:N // 2]) or a[N // 2:] == sorted(a[N // 2:]):
	print(N // 2)
elif a[:N // 4] == sorted(a[:N // 4]) or a[N // 4:N // 2] == sorted(a[N // 4:N // 2]) or a[N // 2:3 * (N // 4)] == sorted(a[N // 2:3 * (N // 4)]) or (a[3 * (N // 4):] == sorted(a[3 * (N // 4):])):
	print(N // 4)
elif N == 8:
	print(1)
else:
	flag = 0
	for i in range(8):
		if a[2 * i] <= a[2 * i + 1]:
			flag = 1
	if flag == 1:
		print(2)
	else:
		print(1)


n = int(input().strip())
a = []
for i in input().strip().split():
	a.append(int(i))

def findMax(l):
	if all((l[i] <= l[i + 1] for i in range(len(l) - 1))):
		return len(l)
	else:
		mid = int(len(l) / 2.0)
		return max(findMax(l[:mid]), findMax(l[mid:]))
print(findMax(a))


from sys import stdin

def checkSortedOrThanos(ms):
	if len(ms) == 1:
		return 1
	m = len(ms) // 2
	(ls, rs) = (ms[:m], ms[m:])
	(ln, rn) = (checkSortedOrThanos(ls), checkSortedOrThanos(rs))
	if m == ln and m == rn and (ls[-1] <= rs[0]):
		return len(ms)
	return max(ln, rn)
n = int(stdin.readline().strip('\n'))
ms = list(map(int, stdin.readline().strip().split()))
print(checkSortedOrThanos(ms))


def thanos(x):
	le = int(len(x) / 2)
	if sorted(x) == x or len(x) == 1:
		return len(x)
	else:
		return max(thanos(x[:le]), thanos(x[le:]))
n = int(input())
arr = [int(i) for i in input().split()]
print(thanos(arr))


n = int(input())
a = list(map(int, input().split()))
maxLen = 1

def isSorted(arr):
	i = 0
	while i < len(arr) - 1:
		if arr[i] > arr[i + 1]:
			return False
		i += 1
	return True

def snap(l, u):
	global maxLen
	if l + 1 < u:
		if isSorted(a[l:u]):
			if len(a[l:u]) > maxLen:
				maxLen = u - l
		snap(l, int((u + l) / 2))
		snap(int((u + l) / 2), u)
snap(0, n)
print(maxLen)


n = int(input())
a = [int(x) for x in input().split()]
b = []

def sortTanos(a):
	if a == sorted(a):
		b.append(len(a))
	else:
		sortTanos(a[:len(a) // 2])
		sortTanos(a[len(a) // 2:])
sortTanos(a)
print(max(b))


def ts(l):
	if not l:
		return []
	if sorted(l) == l:
		return l
	(part1, part2) = (l[:len(l) // 2], l[len(l) // 2:])
	r1 = ts(part1)
	r2 = ts(part2)
	return r1 if len(r1) > len(r2) else r2
n = int(input())
l = list(map(int, input().split()))
print(len(ts(l)))


n = int(input())
k = list(map(int, input().split()))

def thanossort(n, lis):
	if len(lis) == 1:
		return 1
	count1 = 1
	for i in range(n - 1):
		if lis[i] <= lis[i + 1]:
			count1 += 1
			pass
		elif i + 1 >= n / 2:
			x = int(n / 2)
			del lis[x:]
			if len(lis) == 1:
				break
			else:
				y = thanossort(len(lis), lis)
				count1 = y
				break
		else:
			x = int(n / 2)
			del lis[0:x]
			if len(lis) == 1:
				break
			else:
				y = thanossort(len(lis), lis)
				count1 = y
				break
	return count1
print(thanossort(n, k))


n = list(map(int, input().split()))
n = n[0]
m = list(map(int, input().split()))
mas = [0 for i in range(17)]
mas[1] = 0
mas[2] = 1
mas[4] = 2
mas[8] = 3
mas[16] = 4
res = 1
k = mas[n]
okk = True
for i in range(k):
	for j in range(2 ** i):
		ok = True
		s = ''
		for l in range(round(j * n // 2 ** i), round((j + 1) * n // 2 ** i) - 1, 1):
			if m[l] > m[l + 1]:
				ok = False
		if ok == True and okk == True:
			okk = False
			res = round(n // 2 ** i)
print(res)


n = int(input())
a = [int(x) for x in input().split()]

def left(a):
	return a[:len(a) // 2]

def right(a):
	return a[len(a) // 2:]

def tanos(a):
	if sorted(a) == a:
		return len(a)
	return max(tanos(left(a)), tanos(right(a)))
print(tanos(a))


n = int(input())
inputlist = input().split(' ')
arr = []
for i in inputlist:
	arr += [int(i)]

def is_sorted(l):
	return l == sorted(l)

def thanos_snap(l):
	if is_sorted(l):
		return len(l)
	else:
		return max(thanos_snap(l[0:len(l) // 2]), thanos_snap(l[len(l) // 2:]))
print(thanos_snap(arr))


def abc(l, c):
	x = sorted(l)
	if x == l:
		return max(len(l), c)
	a = abc(l[:len(l) // 2], c)
	b = abc(l[len(l) // 2:], c)
	return max(a, b, c)
n = int(input())
l = list(map(int, input().split()))
print(abc(l, 1))


N = int(input())
A = list(map(int, input().split()))

def maxcnt(A):
	half = int(len(A) / 2)
	if A == sorted(A):
		return len(A)
	else:
		return max(maxcnt(A[0:half]), maxcnt(A[half:]))
print(maxcnt(A))


__author__ = 'NIORLYS'
n = int(input())
ar = list(map(int, input().split()))

def find_max(a, i, j):
	if i == j:
		return 1
	count = 1
	temp = 1
	for k in range(i, j - 1 + 1):
		if a[k] <= a[k + 1]:
			temp += 1
		else:
			count = max(temp, count)
			temp = 1
	count = max(temp, count)
	return count

def finder_max_sorted(a, i, j):
	mid = (i + j) // 2
	count_l = find_max(a, i, mid)
	count_r = find_max(a, mid + 1, j)
	if count_l == count_r == (j - i + 1) // 2:
		if a[mid] <= a[mid + 1]:
			return j - i + 1
		return count_l
	if count_r == count_l:
		return max(finder_max_sorted(a, i, mid), finder_max_sorted(a, mid + 1, j))
	if count_r < count_l:
		return finder_max_sorted(a, i, mid)
	return finder_max_sorted(a, mid + 1, j)
if n == 1:
	print(1)
else:
	print(finder_max_sorted(ar, 0, n - 1))


import math
N = int(input())
data = list(map(int, input().split()))

def check_sort(data):
	data_sorted = sorted(data)
	if data == data_sorted:
		return True
	elif data != data_sorted:
		return False
for i in range(int(math.log2(N)) + 1):
	length_tmp = 2 ** i
	for j in range(N // length_tmp):
		data_tmp = data[j * length_tmp:(j + 1) * length_tmp]
		if data_tmp == sorted(data_tmp):
			ans = length_tmp
print(ans)


n = int(input())
l = list(map(int, input().rstrip().split()))

def thanos(l):
	j = list(l)
	j.sort()
	if j == l:
		return len(j)
	p = len(j) // 2
	k1 = l[:p]
	k2 = l[p:]
	return max(thanos(k1), thanos(k2))
print(thanos(l))


import sys
import random
n = int(input().strip())
A = list(map(int, input().split()))

def issorted(A):
	return all((A[i] <= A[i + 1] for i in range(len(A) - 1)))

def thanossort(A):
	if len(A) == 1:
		return 1
	elif issorted(A):
		return len(A)
	else:
		return max(thanossort(A[0:len(A) // 2]), thanossort(A[len(A) // 2:]))
print(thanossort(A))


n = int(input())
a = [int(s) for s in input().split()]

def sortir(A):
	if len(A) <= 1:
		return 1
	else:
		b = []
		b = b + A
		b.sort()
		if A == b:
			return len(A)
		else:
			q = [A[i] for i in range(len(A) // 2)]
			w = [A[i] for i in range(len(A) // 2, len(A))]
	e = sortir(q)
	r = sortir(w)
	if e >= r:
		return e
	else:
		return r
s = sortir(a)
print(s)


n = int(input())
a = list(map(int, input().split()))

def go(L, R):
	if L >= R:
		return 1
	if a[L:R + 1] == sorted(a[L:R + 1]):
		return R - L + 1
	M = (L + R) // 2
	return max(go(L, M), go(M + 1, R))
print(go(0, n - 1))


l = int(input())
arr = list(map(int, input().split()))

def ts(arr):
	if arr == sorted(arr):
		return len(arr)
	half = len(arr) // 2
	return max(ts(arr[:half]), ts(arr[half:]))
print(ts(arr))


n = int(input())

def sort(w):
	new = [0] * (len(w) // 2)
	for i in range(len(w) // 2):
		new[i] = w[i]
	return new

def anti(w):
	k = 0
	new = [0] * (len(w) // 2)
	for i in range(len(w) // 2, len(w)):
		new[k] = w[i]
		k += 1
	return new
a = map(int, input().split()[:n])
a = list(a)
k = 0
if a == sorted(a):
	k = len(a)
elif len(a) == 2:
	k = 1
elif len(a) == 4:
	q = sort(a)
	w = anti(a)
	if sorted(q) == q or sorted(w) == w:
		k = 2
	else:
		k = 1
elif len(a) == 8:
	q = sort(a)
	w = anti(a)
	if sorted(q) == q or sorted(w) == w:
		k = 4
	else:
		t = sort(q)
		r = anti(q)
		r1 = sort(w)
		t1 = anti(w)
		if sorted(t) == t or sorted(r) == r:
			k = 2
		elif sorted(r1) == r1 or sorted(t1) == t1:
			k = 2
		else:
			k = 1
elif len(a) == 16:
	q = sort(a)
	w = anti(a)
	if sorted(q) == q or sorted(w) == w:
		k = 8
	else:
		t = sort(q)
		r = anti(q)
		r1 = sort(w)
		t1 = anti(w)
		if sorted(t) == t or sorted(r) == r or sorted(r1) == r1 or (sorted(t1) == t1):
			k = 4
		else:
			t2 = sort(t)
			r2 = anti(t)
			r3 = sort(r1)
			t3 = anti(r1)
			r4 = sort(t1)
			t5 = anti(t1)
			r5 = sort(r)
			r6 = anti(r)
			if sorted(t2) == t2 or sorted(r2) == r2 or sorted(r3) == r3 or (sorted(t3) == t3) or (sorted(r4) == r4) or (sorted(t5) == t5) or (sorted(r5) == r5) or (sorted(r6) == r6):
				k = 2
			else:
				k = 1
print(k)


input()
(A, res) = (list(map(int, input().split())), 0)

def F(A):
	global res
	if A[:len(A) // 2] == sorted(A[:len(A) // 2]) or A[len(A) // 2:len(A)] == sorted(A[len(A) // 2:len(A)]):
		res = len(A) // 2
		return 0
	else:
		F(A[:len(A) // 2])
		F(A[len(A) // 2:len(A)])
if A == sorted(A):
	print(len(A))
else:
	F(A)
	print(res)


def check(arr):
	if sorted(arr) == arr:
		return len(arr)
	h = len(arr) // 2
	return max(check(arr[:h]), check(arr[h:]))
n = int(input())
arr = [int(e) for e in input().split()]
print(check(arr))


def check(a):
	b = []
	b = sorted(a)
	if b == a:
		return len(a)
	else:
		temp1 = []
		temp2 = []
		for i in range(len(a) // 2):
			temp1.append(a[i])
		for i in range(len(a) // 2, len(a)):
			temp2.append(a[i])
		return max(check(temp1), check(temp2))
n = int(input())
l = list(map(int, input().split()))
print(check(l))


def is_sorted(a, l):
	i = 0
	while i < l - 1:
		if a[i + 1] < a[i]:
			return False
		i += 1
	return True

def thanos_sort(m):
	array_len = len(m)
	if is_sorted(m, array_len):
		return array_len
	half_len = int(array_len / 2)
	return max(thanos_sort(m[:half_len]), thanos_sort(m[half_len:]))

def main():
	n = int(input())
	m = [int(i) for i in input().split()]
	return thanos_sort(m)
print(main())


def thanos_sort(N: int, A: list) -> int:
	if N == 1:
		return 1
	l = thanos_sort(N // 2, A[:N // 2])
	r = thanos_sort(N // 2, A[N // 2:])
	if l == N // 2 and r == N // 2 and (A[N // 2 - 1] <= A[N // 2]):
		return l + r
	return max(l, r)
N = int(input())
A = [int(s) for s in input().split()]
ans = thanos_sort(N, A)
print(ans)


n = int(input())
a = [int(i) for i in input().split()]

def q(a):
	if sorted(a) == a:
		return 2
	else:
		return 1

def w(a):
	if sorted(a) == a:
		return 4
	else:
		a1 = a[0:2]
		a2 = a[2:4]
		return max(q(a1), q(a2))

def e(a):
	if sorted(a) == a:
		return 8
	else:
		a1 = a[0:4]
		a2 = a[4:8]
		return max(w(a1), w(a2))

def r(a):
	if sorted(a) == a:
		return 16
	else:
		a1 = a[0:8]
		a2 = a[8:16]
		return max(e(a1), e(a2))
if n == 2:
	print(q(a))
elif n == 4:
	print(w(a))
elif n == 8:
	print(e(a))
elif n == 16:
	print(r(a))
else:
	print(1)


n = int(input())
nums = list(map(int, input().split()))

def solve(l, r):
	if r - l == 1:
		return 1
	(l_ans, r_ans) = (solve(l, (l + r) // 2), solve((l + r) // 2, r))
	if l_ans == r_ans and l_ans == (r - l) // 2 and (nums[(l + r) // 2 - 1] <= nums[(l + r) // 2]):
		return l_ans + r_ans
	return max(l_ans, r_ans)
print(solve(0, n))


def sortd(arr, n):
	for i in range(1, n):
		if arr[i] < arr[i - 1]:
			return False
	return True

def thanos(arr, n):
	if sortd(arr, n):
		return n
	else:
		return max(thanos(arr[:n // 2], n // 2), thanos(arr[n // 2:], n // 2))
t = input()
num = input()
num1 = list(map(int, num.split(' ')))
print(thanos(num1, int(t)))


def check_sorted(liste):
	return True if liste == sorted(liste) else False
n = int(input())
a = list(map(int, input().split()))
lng_sub = n
num_subs = 1
if check_sorted(a):
	ans = lng_sub
else:
	num_subs *= 2
	lng_sub //= 2
	done = False
	while not done:
		for i in range(num_subs):
			if check_sorted(a[i * lng_sub:i * lng_sub + lng_sub]):
				ans = lng_sub
				done = True
				break
		else:
			num_subs *= 2
			lng_sub //= 2
	ans = lng_sub
print(ans)


def T(first, last):
	check = 1
	for i in range(first, last):
		if a[i] > a[i + 1]:
			check = 0
			break
	if check:
		return last - first + 1
	else:
		tg = int((first + last) / 2)
		return max(T(first, tg), T(tg + 1, last))
n = int(input())
a = [int(i) for i in input().split()]
print(T(0, n - 1))


import sys
inf = float('inf')
mod = 1000000007

def get_array():
	return list(map(int, sys.stdin.readline().split()))

def get_ints():
	return map(int, sys.stdin.readline().split())

def input():
	return sys.stdin.readline()

def main():
	n = int(input())
	arr = get_array()
	if arr == sorted(arr):
		print(n)
		return
	n //= 2
	if n == 0:
		print(1)
		return
	x = arr[:n]
	y = arr[n:]
	if x == sorted(x) or y == sorted(y):
		print(n)
		return
	n //= 2
	if n == 0:
		print(1)
		return
	x1 = x[:n]
	x2 = x[n:]
	y1 = y[:n]
	y2 = y[n:]
	if x1 == sorted(x1) or x2 == sorted(x2) or y2 == sorted(y2) or (y1 == sorted(y1)):
		print(n)
		return
	n //= 2
	if n == 0:
		print(1)
		return
	x11 = x1[:n]
	x12 = x1[n:]
	x21 = x2[:n]
	x22 = x2[n:]
	y11 = y1[:n]
	y12 = y1[n:]
	y21 = y2[:n]
	y22 = y2[n:]
	if x11 == sorted(x11) or x22 == sorted(x22) or x21 == sorted(x21) or (x12 == sorted(x12)):
		print(n)
		return
	if y11 == sorted(y11) or y12 == sorted(y12) or y21 == sorted(y21) or (y22 == sorted(y22)):
		print(n)
		return
	n //= 2
	if n == 0:
		print(1)
		return
main()


def is_sorted(x):
	for i in range(len(x) - 1):
		if x[i] > x[i + 1]:
			return False
	return True

def find_ans(x):
	l = len(x)
	if is_sorted(x):
		return l
	return max(find_ans(x[:l // 2]), find_ans(x[l // 2:]))
input()
inpt = [int(x) for x in input().split()]
print(find_ans(inpt))


n = int(input())
array = [*map(int, input().split())]

def sort(a):
	if sorted(a) == a:
		return a
	d = len(a) // 2
	b = sort(a[:d])
	c = sort(a[d:])
	if len(b) < len(c):
		return c
	return b
print(len(sort(array)))


def func(mas):
	is_sorted = True
	for i in range(1, len(mas)):
		if mas[i] < mas[i - 1]:
			is_sorted = False
			break
	if is_sorted:
		return len(mas)
	else:
		return max(func(mas[:len(mas) // 2]), func(mas[len(mas) // 2:]))
a = int(input())
b = list(map(int, input().split()))
print(func(b))


def panos_sort(first, end, a):
	cur = end - first + 1
	mid = first + (cur - 1) // 2
	if cur == 1:
		return 1
	if cur == 2:
		return 2 if a[first] <= a[end] else 1
	f_res = panos_sort(first, mid, a)
	e_res = panos_sort(mid + 1, end, a)
	if f_res == cur // 2 and e_res == cur // 2:
		return cur if a[mid] <= a[mid + 1] else max(f_res, e_res)
	else:
		return max(f_res, e_res)

def main():
	n = int(input())
	a = list(map(int, input().split()))
	print(panos_sort(0, n - 1, a))
main()


import math, sys
input = sys.stdin.readline

def inp():
	return int(input())

def invr():
	return list(map(int, input().split()))

def sorted(a):
	prev = a[0]
	for i in range(1, len(a)):
		if a[i] < prev:
			return 0
		else:
			prev = a[i]
	return 1
n = inp()
a = invr()
if sorted(a):
	print(len(a))
else:
	b = [a]
	s = []
	i = 0
	while i < len(b):
		e = b[i]
		r = b.pop(i)
		if sorted(e):
			s.append(e)
			i -= 1
		else:
			mid = int(len(r) / 2)
			b.append(r[:mid])
			b.append(r[mid:])
			i = -1
		i += 1
	g = len(s[0])
	for i in s:
		if len(i) > g:
			g = len(i)
	print(g)


def thanos(lst, n):
	if n == 1:
		return 1
	x = sorted(lst)
	count = 0
	for j in range(n):
		if lst[j] == x[j]:
			count += 1
	if count == n:
		return n
	else:
		return max(thanos(lst[0:len(x) // 2], n // 2), thanos(lst[len(x) // 2:len(x)], n // 2))
a = int(input())
nums = list(map(int, input().split()))
print(thanos(nums, a))


n = int(input())
array = []
done = True
isSort = False

def sort(array):
	small = array[0]
	for e in array:
		if e < small:
			return False
		small = e
	return True

def isSort(array):
	if len(array) == 1:
		return 1
	if sort(array):
		return len(array)
	half = int(len(array) / 2)
	firest_array = array[0:half]
	second_array = array[half:]
	issorted_firest = sort(firest_array)
	isSorted_secod = sort(second_array)
	if issorted_firest or isSorted_secod:
		return len(second_array)
	secod_half = int(len(firest_array) / 2)
	if not issorted_firest:
		n1 = isSort(firest_array[secod_half:])
		n2 = isSort(firest_array[0:secod_half])
		if n1 > n2:
			max_1 = n1
		else:
			max_1 = n2
	n3 = isSort(second_array[secod_half:])
	n4 = isSort(second_array[0:secod_half])
	if n3 > n4:
		max_2 = n3
	else:
		max_2 = n4
	if max_1 > max_2:
		return max_1
	return max_2
	return n4

def isSorted(array_1, array_2):
	if len(array) == 1:
		return 1
	if sort(array):
		return len(array)
	half = int(len(array) / 2)
	firest_array = array[0:half]
	second_array = array[half:]
	issorted_firest = sort(firest_array)
	isSorted_secod = sort(second_array)
	if issorted_firest or isSorted_secod:
		return len(second_array)
	if not issorted_firest:
		return isSort(firest_array)
	return isSort(second_array)
if n % 2 == 0 and n >= 1 and (n <= 16):
	line = input().split()
	for e in line:
		if int(e) >= 1 and int(e) <= 100:
			array.append(int(e))
		else:
			done = False
	if done:
		print(isSort(array))
else:
	print(1)


n = int(input())
a = list(map(int, input().split()))
sort = False

def thanos_sort(arr):
	if sorted(arr) == arr:
		return len(arr)
	else:
		a = thanos_sort(arr[:len(arr) // 2])
		b = thanos_sort(arr[len(arr) // 2:])
		return max(a, b)
print(thanos_sort(a))


def prov(a):
	for i in range(1, len(a)):
		if a[i] < a[i - 1]:
			return 0
	return len(a)
k = 0
n = int(input())
a = [int(i) for i in input().split()]
sort = []
while 1:
	for i in range(len(a)):
		sort.append(a[i])
		if k == n - 1:
			l = prov(sort)
			k = 0
			sort = []
			if l != 0:
				print(l)
				exit(0)
		else:
			k += 1
	n //= 2


n = int(input())
lst = list(map(int, input().split()))

def func(l):
	length = len(l)
	if length == 1:
		return 1
	if length == 2:
		if l[1] >= l[0]:
			return 2
		return 1
	f1 = func(l[:length // 2])
	f2 = func(l[length // 2:])
	if f1 % 2 == 0 and f2 % 2 == 0:
		if f1 + f2 == length and l[length // 2 - 1] <= l[length // 2]:
			return f1 + f2
		return max(f1, f2)
	return max(f1, f2)
answer = func(lst)
print(answer)


n = int(input())
a = list(map(int, input().split()))
t = 1
check = False
while t < n and (not check):
	j = 0
	for i in range(t):
		A = a[j:n // t * (i + 1)]
		A.sort()
		if A == a[j:n // t * (i + 1)]:
			Z = len(A)
			check = True
			break
		j = n // t * (i + 1)
	t *= 2
if check:
	print(Z)
else:
	print('1')


def Thanos(array, start, end):
	for i in range(start + 1, end + 1):
		if array[i] < array[i - 1]:
			return False
	return True

def Arr(array, start, end):
	if Thanos(array, start, end) == True:
		return end - start + 1
	if end - start == 0:
		return 1
	return max(Arr(array, start, start + (end - start) // 2), Arr(array, start + (end - start) // 2 + 1, end))
n = int(input())
array = list(map(int, input().strip().split()))
print(Arr(array, 0, n - 1))


def thanos_sort(arry):
	while sorted(arry) != arry:
		new_arry_len = int((len(arry) + 1) / 2)
		return max(thanos_sort(arry[new_arry_len:]), thanos_sort(arry[:-new_arry_len]))
	return len(arry)
n = input()
vals = input()
arry = []
for i in vals.split(' '):
	arry.append(int(i))
print(thanos_sort(arry))


def function(a):
	if sorted(a) == a:
		return len(a)
	k = len(a) // 2
	return max(function(a[:k]), function(a[k:]))
n = int(input())
a = [int(x) for x in input().split()]
print(function(a))


n = int(input())
ar = list(map(int, input().split()))
ans = 1
ch = n
while ch > 0:
	ns = n // ch
	le = ch
	for i in range(ns):
		te = ar[i * le:(i + 1) * le].copy()
		te.sort()
		if te == ar[i * le:(i + 1) * le]:
			ans = max(ans, le)
	ch //= 2
print(ans)


mx = 0

def f(a):
	global mx
	if a == sorted(a):
		mx = max(mx, len(a))
	else:
		f(a[:len(a) // 2])
		f(a[len(a) // 2:])
n = int(input())
a = list(map(int, input().split()))
f(a)
print(mx)


n = int(input())
a = list(map(int, input().split()))

def isSorted(a):
	return not sum(map(lambda x, y: x > y, a, a[1:]))

def task(a):
	n = len(a)
	if isSorted(a):
		return n
	else:
		return max(task(a[:n // 2]), task(a[n // 2:]))
print(task(a))


n = int(input())
array = list(map(int, input().split()))

def divide(left, right):
	if left == sorted(left):
		return len(left)
	elif right == sorted(right):
		return len(right)
	return max(divide(left[:len(left) // 2], left[len(left) // 2:]), divide(right[:len(right) // 2], right[len(right) // 2:]))
if array == sorted(array):
	length = len(array)
else:
	length = divide(array[:n // 2], array[n // 2:])
print(length)


def checkSorted(arr):
	length = len(arr)
	for i in range(0, length - 1):
		if arr[i] > arr[i + 1]:
			return False
	return True

def thanosSort(arr):
	if checkSorted(arr):
		return len(arr)
	else:
		l = len(arr)
		length = l
		while length >= 1:
			if length == 1:
				return 1
			else:
				length = length // 2
				number = l // length
				for i in range(0, l, length):
					if checkSorted(arr[i:i + length]):
						return length
l = int(input())
array = [int(x) for x in input().split()]
print(thanosSort(array))


def tanos_sort(array):
	if array == sorted(array):
		return len(array)
	else:
		answer = [tanos_sort(array[:len(array) // 2]), tanos_sort(array[len(array) // 2:])]
		return max(answer)
_ = int(input())
print(tanos_sort([int(x) for x in input().split()]))


def s(x):
	for i in range(1, len(x)):
		if x[i - 1] > x[i]:
			return False
	return True
n = int(input())
x = [int(i) for i in input().split()]
cp = 1
ba = 1
while cp <= n:
	for i in range(0, n - cp + 1, cp):
		if s(x[i:i + cp]):
			ba = cp
	cp *= 2
print(ba)


n = int(input())
a = list(map(int, input().split()))
b = n
flag = True
while b > 0 and flag:
	for i in range(0, n, b):
		if sorted(a[i:i + b]) == a[i:i + b]:
			print(b)
			flag = False
			break
	b = b // 2


def do():
	n = int(input())
	nums = [int(i) for i in input().split(' ')]
	gap = len(nums)
	while gap >= 1:
		for i in range(0, n, gap):
			count = 1
			for j in range(i + 1, i + gap):
				if nums[j] >= nums[j - 1]:
					count += 1
				else:
					break
			if count == gap:
				return count
		gap //= 2
print(do())


def func(l):
	if len(l) == 2:
		if l[0] <= l[1]:
			return 2
		return 1
	elif len(l) == 1:
		return 1
	res_left = func(l[:int(len(l) / 2)])
	res_right = func(l[int(len(l) / 2):])
	if res_left + res_right == len(l):
		if l[int(len(l) / 2) - 1] <= l[int(len(l) / 2)]:
			return len(l)
	return max(res_left, res_right)
n = int(input())
l = list(map(int, input().split()))
print(func(l))


def issorted(arr):
	length = len(arr)
	for c in range(1, length):
		if arr[c] < arr[c - 1]:
			return False
	return True

def maximalthanossort(arr):
	length = len(arr)
	if issorted(arr):
		return len(arr)
	return int(max(maximalthanossort(arr[:int(length / 2)]), maximalthanossort(arr[int(length / 2):])))

def main():
	n = int(input())
	l = [*map(int, input().split())]
	print(maximalthanossort(l))
main()


def intinputlist():
	l = [int(x) for x in input().split()]
	return l

def printlist(l):
	print(*l)

def power(x, y, p):
	res = 1
	x = x % p
	while y > 0:
		if y & 1 == 1:
			res = res * x % p
		y = y >> 1
		x = x * x % p
	return res

def countd(n):
	if n > 0:
		digits = int(math.log10(n)) + 1
	elif n == 0:
		digits = 1
	else:
		digits = int(math.log10(-n)) + 2
	return digits

def thanossort(l):
	h = int(len(l) / 2)
	p1 = l[0:h]
	p2 = l[h:2 * h]
	decr1 = 0
	for i in range(h - 1):
		if p1[i] > p1[i + 1]:
			decr1 = 1
			break
	decr2 = 0
	for i in range(h - 1):
		if p2[i] > p2[i + 1]:
			decr2 = 1
			break
	l1 = 0
	if p1[h - 1] <= p2[0]:
		l1 = 1
	if decr1 == 0 and decr2 == 0 and l1:
		return l
	elif decr1 == 0 and decr2 == 0 and (l1 == 0):
		return p1
	elif decr1 == 0 and decr2:
		return p1
	elif decr1 and decr2 == 0:
		return p2
	else:
		r1 = thanossort(p1)
		r2 = thanossort(p2)
		if len(r1) >= len(r2):
			return r1
		else:
			return r2
n = int(input())
l = intinputlist()
if len(l) == 1:
	print(1)
else:
	print(len(thanossort(l)))


n = int(input())
a = list(map(int, input().split()))

def sort(l):
	for i in range(len(l) - 1):
		if l[i + 1] < l[i]:
			return False
	return True

def answer(l):
	if len(l) == 1:
		return 1
	if sort(l):
		return len(l)
	r = max(answer(l[:len(l) // 2]), answer(l[len(l) // 2:]))
	return r
print(answer(a))


def is_sorted(arr):
	if len(arr) > 1:
		if arr[-1] < arr[-2]:
			return False
		for i in range(len(arr) - 1):
			if arr[i] > arr[i + 1]:
				return False
	return True
length = int(input())
arr_in = list(input().split(' '))
arr = []
for i in arr_in:
	arr.append(int(i))

def thanos_sort(arr, length):
	if is_sorted(arr) == True:
		return len(arr)
	else:
		mid_index = length // 2
		lis = []
		if is_sorted(arr[:mid_index]) == True:
			lis.append(len(arr[:mid_index]))
		if is_sorted(arr[mid_index:]) == True:
			lis.append(len(arr[mid_index:]))
		if len(lis) == 0:
			fist_arr_max = thanos_sort(arr[:mid_index], len(arr[:mid_index]))
			sec_arr_max = thanos_sort(arr[mid_index:], len(arr[mid_index:]))
			return max(fist_arr_max, sec_arr_max)
		else:
			return max(lis)
print(thanos_sort(arr, length))


def IsSorted(n):
	for x in range(len(n) - 1):
		if n[x] > n[x + 1]:
			return 0
	return 1

def solve(n):
	if IsSorted(n):
		return len(n)
	return max(solve(n[:len(n) // 2]), solve(n[len(n) // 2:]))
input()
num = list(map(int, input().split()))
print(solve(num))


def list_undecreasing(l):
	for i in range(len(l) - 1):
		if l[i] > l[i + 1]:
			return False
	return True

def list_test(l):
	if len(l) == 1:
		return 1
	if list_undecreasing(l):
		return len(l)
	half = len(l) // 2
	len1 = list_test(l[:half])
	len2 = list_test(l[half:])
	return max(len1, len2)
n = int(input())
l = [int(e) for e in input().split()]
print(list_test(l))


n = int(input())
a = [int(s) for s in input().split()]

def auto_comparision(some_list):
	sorted_some_list = sorted(some_list)
	if sorted_some_list == some_list:
		return True
	else:
		return False
if n == 1:
	print('1')
elif n == 2:
	if auto_comparision(a) == True:
		print('2')
	else:
		print('1')
elif n == 4:
	main = [a, a[:2], a[2:]]
	if auto_comparision(main[0]) == True:
		print('4')
	elif auto_comparision(main[1]) == True:
		print('2')
	elif auto_comparision(main[2]) == True:
		print('2')
	else:
		print('1')
elif n == 8:
	main = [a, a[:4], a[4:], a[:2], a[2:4], a[4:6], a[6:]]
	if auto_comparision(main[0]) == True:
		print('8')
	elif auto_comparision(main[1]) == True:
		print('4')
	elif auto_comparision(main[2]) == True:
		print('4')
	elif auto_comparision(main[3]) == True:
		print('2')
	elif auto_comparision(main[4]) == True:
		print('2')
	elif auto_comparision(main[5]) == True:
		print('2')
	elif auto_comparision(main[6]) == True:
		print('2')
	else:
		print('1')
elif n == 16:
	main = [a, a[:8], a[8:], a[:4], a[4:8], a[8:12], a[12:], a[:2], a[2:4], a[4:6], a[6:8], a[8:10], a[10:12], a[12:14], a[14:]]
	if auto_comparision(main[0]) == True:
		print('16')
	elif auto_comparision(main[1]) == True:
		print('8')
	elif auto_comparision(main[2]) == True:
		print('8')
	elif auto_comparision(main[3]) == True:
		print('4')
	elif auto_comparision(main[4]) == True:
		print('4')
	elif auto_comparision(main[5]) == True:
		print('4')
	elif auto_comparision(main[6]) == True:
		print('4')
	elif auto_comparision(main[7]) == True:
		print('2')
	elif auto_comparision(main[8]) == True:
		print('2')
	elif auto_comparision(main[9]) == True:
		print('2')
	elif auto_comparision(main[10]) == True:
		print('2')
	elif auto_comparision(main[11]) == True:
		print('2')
	elif auto_comparision(main[12]) == True:
		print('2')
	elif auto_comparision(main[13]) == True:
		print('2')
	elif auto_comparision(main[14]) == True:
		print('2')
	else:
		print('1')


def is_sorted(a, l, r):
	for i in range(l, r):
		if a[i] > a[i + 1]:
			return False
	return True
n = int(input())
a = list(map(int, input().split()))
(size, found) = (n, False)
while not found:
	for i in range(0, n, size):
		if is_sorted(a, i, i + size - 1):
			print(size)
			found = True
			break
	size //= 2


def is_sorted(lst):
	it = lst[0]
	for i in range(1, len(lst)):
		if lst[i] < it:
			return False
		it = lst[i]
	return True

def do(lst):
	if is_sorted(lst):
		return len(lst)
	v1 = do(lst[:len(lst) // 2])
	v2 = do(lst[len(lst) // 2:])
	return max(v1, v2)
N = int(input())
A = list(map(int, input().split()))
print(do(A))


def FingerSnap(L):
	n = len(L)
	l1 = L[:n // 2]
	l2 = L[n // 2:]
	return (l1, l2)

def Sorted(L):
	if len(L) == 1:
		return True
	for i in range(1, len(L)):
		if int(L[i]) < int(L[i - 1]):
			return False
	return True

def ThanosSort(L):
	if Sorted(L):
		return L
	else:
		(l1, l2) = FingerSnap(L)
	l1 = ThanosSort(l1)
	l2 = ThanosSort(l2)
	if len(l1) >= len(l2):
		return l1
	else:
		return l2
t = int(input())
ch = str(input())
L = ch.split()
print(len(ThanosSort(L)))


n = int(input())
a = input().split()
for i in range(n):
	a[i] = int(a[i])
m = n
b = [(0, 0), (0, 1), (0, 3), (0, 7), (0, 15), (1, 1), (2, 2), (2, 3), (3, 3), (4, 4), (4, 5), (4, 7), (5, 5), (6, 6), (6, 7), (7, 7), (8, 8), (8, 9), (8, 11), (8, 15), (9, 9), (10, 10), (10, 11), (11, 11), (12, 12), (12, 13), (12, 15), (13, 13), (14, 14), (14, 15), (15, 15)]
j = 0
ans = 1
for i in range(1, n):
	if a[i - 1] > a[i]:
		for (l, r) in b:
			if (l >= j) & (r <= i - 1):
				if r - l + 1 > ans:
					ans = r - l + 1
		j = i
i = n
for (l, r) in b:
	if (l >= j) & (r <= i - 1):
		if r - l + 1 > ans:
			ans = r - l + 1
print(ans)


def issorted(a, b, e):
	prev = -1
	for val in a[b:e]:
		if val < prev:
			return False
		prev = val
	return True
n = int(input())
a = list(map(int, input().split()))
len = n
while len > 0:
	for i in range(0, n, len):
		if issorted(a, i, i + len):
			print(len)
			len = 0
			break
	len >>= 1


n = int(input())
nums = list(map(int, input().split()))
currMax = 1
curr = 2
while curr <= n:
	for i in range(0, n, curr):
		tmp = nums[i:i + curr]
		x = sorted(tmp)
		count = 0
		for j in range(curr):
			if tmp[j] == x[j]:
				count += 1
		if count == curr:
			currMax = curr
	curr = curr * 2
print(currMax)


n = int(input())
a = list(map(int, input().split()))
for size in [16, 8, 4, 2, 1]:
	if size > n:
		continue
	for start in range(0, n, size):
		if a[start:start + size] == sorted(a[start:start + size]):
			print(size)
			exit()


def is_Sorted(lst):
	lst1 = lst[:]
	lst2 = lst[:]
	lst1.sort()
	if lst1 == lst2:
		return True
	return False
n = int(input())
ints = input().split(' ')
integers = [int(i) for i in ints]
while is_Sorted(integers) == False:
	half = int(len(integers) / 2)
	last_half = integers[half:]
	first_half = integers[:half]
	if is_Sorted(first_half):
		integers = first_half
	else:
		integers = last_half
print(len(integers))


n = int(input())
l = list(map(int, input().split()))
ni = n
po = 0
while n > 1:
	po += 1
	n //= 2
for i in range(po, -1, -1):
	size = 2 ** i
	for ii in range(0, ni, size):
		if l[ii:ii + size] == sorted(l[ii:ii + size]):
			print(size)
			exit()


n = int(input())
a = list(map(int, input().strip().split()))
ans = 1

def f(a):
	global ans
	h = len(a) // 2
	if h == 0:
		return
	if sorted(a) == a:
		if len(a) > ans:
			ans = len(a)
		return
	f(a[:h])
	f(a[h:])
f(a)
print(ans)


size = int(input())
mas = list(map(int, input().split()))

def power(n):
	if n[1] == 2:
		return n[0] + 1
	else:
		n[1] = n[1] / 2
		n[0] = n[0] + 1
		return power(n)
if size == 1:
	print(1)
else:
	size = power([0, size])
	maximum = 1
	for i in range(size):
		step = 2 ** (i + 1)
		for k in range(2 ** i, len(mas) + 1, step):
			if mas[k - 1] <= mas[k] and mas[k - 1] != 0 and (mas[k] != 0):
				maximum = step
			else:
				for z in range(int(k - step / 2), int(k - step / 2 + step)):
					mas[z] = 0
	print(maximum)


n = float(input())
a = [int(x) for x in input().split()]
done = False
while not done:
	for i in range(0, len(a), int(n)):
		k = a[i:i + int(n)]
		k2 = k + []
		k.sort()
		if k == k2:
			print(int(n))
			done = True
			break
	n /= 2


def thanos_sort(array):
	if array == sorted(array):
		return len(array)
	else:
		return max(thanos_sort(array[:len(array) // 2]), thanos_sort(array[len(array) // 2:]))
n = int(input())
array = list(map(int, input().split()))
print(thanos_sort(array))


n = input()
_array = input()
new_array = _array.split(' ')
a = []
for i in new_array:
	a.append(int(i))
count = 1
b = 1

def snap(list1, list2):
	_list1 = 1
	_list2 = 1
	count1 = 1
	count2 = 1
	for i in range(0, len(list1) - 1):
		if list1[i] <= list1[i + 1]:
			_list1 += 1
			count1 += 1
		else:
			_list1 = 1
		if list2[i] <= list2[i + 1]:
			count2 += 1
			_list2 += 1
		else:
			_list2 = 1
	if _list1 == len(list1):
		return _list1
	if _list2 == len(list2):
		return _list2
	if count2 > count1:
		_list_length = len(list2) // 2
		list1 = list2[0:_list_length]
		list2 = list2[_list_length:len(list2)]
		b = snap(list1, list2)
		return b
	else:
		_list_length = len(list1) // 2
		list2 = list1[_list_length:len(list1)]
		list1 = list1[0:_list_length]
		b = snap(list1, list2)
		return b
for i in range(0, len(a) - 1):
	if a[i] <= a[i + 1]:
		count += 1
		if count == len(a):
			b = count
	else:
		count = 1
		_list_length = len(a) // 2
		list1 = a[0:_list_length]
		list2 = a[_list_length:len(a)]
		b = snap(list1, list2)
		if b == None:
			b = 1
		break
print(b)


def SI():
	return input()

def II():
	return int(SI())

def STI():
	return SI().split()

def ITI():
	return map(int, STI())

def SLI():
	return list(SI())

def ILI():
	return list(ITI())
n = II()
a = ILI()

def thanos_sort(l, i):
	it = 2 ** i
	ll = len(l)
	for j in range(ll // it):
		sl = l[it * j:it * (j + 1)]
		if sl == sorted(sl):
			return thanos_sort(l, i + 1)
	return 2 ** (i - 1)
print(thanos_sort(a, 0))


import sys
input = lambda : sys.stdin.readline().rstrip('\r\n')
inp = lambda : list(map(int, sys.stdin.readline().rstrip('\r\n').split()))
mod = 10 ** 9 + 7
Mod = 998244353
INF = float('inf')
tc = 1
for test in range(1, tc + 1):
	(n,) = inp()
	a = inp()

	def solve(a):
		for i in range(1, len(a)):
			if a[i] < a[i - 1]:
				return max(solve(a[:len(a) // 2]), solve(a[len(a) // 2:]))
		return len(a)
	print(solve(a))


def th_sort(ns):
	if ns == sorted(ns):
		return len(ns)
	else:
		return max(th_sort(ns[:len(ns) // 2]), th_sort(ns[len(ns) // 2:]))
input()
print(th_sort([int(n) for n in input().split()]))


import random as rd

def is_sorted(array):
	for i in range(len(array) - 1):
		if array[i] > array[i + 1]:
			return i + 1
	return 0
n = input()
a = [int(i) for i in input().split()]

def thanos_sort(array):
	while is_sorted(array):
		i = is_sorted(array)
		target_l = len(array) // 2
		while len(array) > target_l:
			if i < target_l:
				del array[0]
			else:
				del array[len(array) - 1]
	return array
thanos_sort(a)
print(len(a))


def fun(a):
	b = sorted(a)
	if a == b:
		return len(a)
	l = len(a) // 2
	return max(fun(a[:l]), fun(a[l:]))
n = int(input())
a = list(map(int, input().split()))
print(fun(a))


ans = 1

def dfs(t):
	global ans
	st = sorted(t)
	chk = True
	for i in range(len(t)):
		if st[i] != t[i]:
			chk = False
			dfs(t[:len(t) // 2])
			dfs(t[len(t) // 2:])
	if chk:
		ans = max(ans, len(t))
n = int(input())
a = list(map(int, input().split()))
dfs(a)
print(ans)


def thanos(ls):
	if len(ls) == 1:
		return 1
	ok = True
	for i in range(1, len(ls)):
		if ls[i] < ls[i - 1]:
			ok = False
	if ok:
		return len(ls)
	else:
		return max(thanos(ls[:len(ls) // 2]), thanos(ls[len(ls) // 2:]))
n = int(input())
a = [int(x) for x in input().split()]
print(thanos(a))


def thanos(l, r):
	if l == r:
		return 0
	global ar
	global max
	b = True
	i = l
	while i < r:
		if ar[i] > ar[i + 1]:
			b = False
			break
		i += 1
	if b:
		if r - l + 1 > max:
			max = r - l + 1
	else:
		thanos(l, l + (r - l + 1) // 2 - 1)
		thanos(l + (r - l + 1) // 2, r)
input()
ar = list(map(int, input().split()))
max = 1
thanos(0, len(ar) - 1)
print(max)


def f(t, ans):
	if t == sorted(t):
		ans[0] = max(ans[0], len(t))
		return
	f(t[int(len(t) / 2):], ans)
	f(t[:int(len(t) / 2)], ans)
ans = [1]
n = int(input())
a = [int(x) for x in input().split()]
f(a, ans)
print(ans[0])


maxl = []

def thanosSort(a, p, r):
	if p < r:
		checksorted(a, p, r)
		q = (p + r) // 2
		thanosSort(a, p, q)
		thanosSort(a, q + 1, r)

def checksorted(a, p, r):
	s = 0
	for i in range(p, r):
		if a[i] > a[i + 1]:
			s = 1
			break
	if s == 0:
		maxl.append(r - p + 1)
n = int(input())
a = list(map(int, input().split()))
thanosSort(a, 0, n - 1)
if maxl == []:
	print(1)
else:
	print(max(maxl))


def rs():
	return input().rstrip()

def ri():
	return int(rs())

def ra():
	return list(map(int, rs().split()))

def is_sorted(arr):
	for (a, b) in zip(arr, arr[1:]):
		if a > b:
			return False
	else:
		return True

def max_sorted(arr):
	if is_sorted(arr):
		return len(arr)
	else:
		return max(max_sorted(arr[0:len(arr) // 2]), max_sorted(arr[len(arr) // 2:]))
n = rs()
arr = ra()
print(max_sorted(arr))


def is_sorted(l):
	return l == sorted(l)

def thanos_sort(l):
	if is_sorted(l):
		return len(l)
	return max(thanos_sort(l[:len(l) // 2]), thanos_sort(l[len(l) // 2:]))
n = int(input())
l = list(map(int, input().split()))
print(thanos_sort(l))


input()

def thanos_sort(a):
	last = a[0]
	for e in a:
		if e < last:
			return max(thanos_sort(a[int(len(a) / 2):]), thanos_sort(a[:int(len(a) / 2)]))
		last = e
	return len(a)
print(thanos_sort(list(map(int, input().rstrip().split()))))


from collections import deque
n = int(input())
arr = list(map(int, input().split()))
q = deque()

def isSorted():
	global arr
	for i in range(1, len(arr)):
		if arr[i] < arr[i - 1]:
			return False
	return True
q.append(arr)
while q:
	arr = q.popleft()
	if isSorted():
		break
	mid = len(arr) // 2
	q.append(arr[:mid])
	q.append(arr[mid:])
print(len(arr))


def solve(n, arr):
	size = n
	while size > 1:
		is_sort = is_sorted(arr)
		l = max_sorted(arr[:size // 2])
		r = max_sorted(arr[size // 2:])
		if is_sort:
			return size
		if r > l:
			arr = arr[size // 2:]
		else:
			arr = arr[:size // 2]
		size //= 2
	return size

def max_sorted(arr):
	ans = 1
	temp = 1
	for i in range(len(arr) - 1):
		if arr[i] <= arr[i + 1]:
			ans += 1
		elif ans > temp:
			temp = ans
			ans = 0
	return max(temp, ans)

def is_sorted(arr):
	for i in range(len(arr) - 1):
		if arr[i] > arr[i + 1]:
			return False
	return True

def main():
	n = int(input())
	arr = list(map(int, input().split()))
	ans = solve(n, arr)
	print(ans)
main()


def get_sort_count(input_list, length):
	if length == 1:
		return 1
	sorted = True
	for i in range(0, length - 1):
		if input_list[i] > input_list[i + 1]:
			sorted = False
			break
	if sorted == True:
		return len(input_list)
	else:
		return max(get_sort_count(input_list[:int(length / 2)], int(length / 2)), get_sort_count(input_list[int(length / 2):], int(length / 2)))
length = int(input())
input_list = list(map(int, input().split()))
print(get_sort_count(input_list, length))


def convert(string):
	return string.split(sep=None, maxsplit=-1)
n = int(input())
val = convert(input())

def thanos_sort(lst):
	if len(lst) == 1:
		return 1
	else:
		l = len(lst)
		fh = lst[:l // 2]
		sh = lst[l // 2:]
		x = thanos_sort(fh)
		y = thanos_sort(sh)
		if fh[-1] <= sh[0] and x == len(fh) and (y == len(sh)):
			return 2 * x
		else:
			return max(x, y)
print(thanos_sort(list(map(int, val))))


N = int(input())
inLi = [int(val) for val in input().split()]

def solve(arr):
	if len(arr) == 1:
		return 1
	for i in range(0, len(arr) - 1):
		if arr[i] > arr[i + 1]:
			lenA = len(arr)
			ans1 = solve(arr[:int(lenA / 2)])
			ans2 = solve(arr[int(lenA / 2):])
			if ans1 > ans2:
				return ans1
			else:
				return ans2
	return len(arr)
print(solve(inLi))


n = int(input())
arr = list(map(int, input().strip().split()))
half_1 = arr[:len(arr) // 2]
half_2 = arr[len(arr) // 2:]

def sorting(array1, array2):
	if array1 != sorted(array1) and array2 != sorted(array2):
		return sorting(array2[:len(array1) // 2], array2[len(array2) // 2:])
	elif array1 == sorted(array1):
		return len(array1)
	else:
		return len(array2)
if arr == sorted(arr):
	print(len(arr))
else:
	print(sorting(half_1, half_2))


import sys, math, queue
sys.setrecursionlimit(1000000)
ans = []

def solve(x):
	if sorted(x) == x:
		ans.append(len(x))
	else:
		solve(x[:len(x) // 2])
		solve(x[len(x) // 2:])
n = int(input())
a = list(map(int, input().split()))
solve(a)
print(max(ans))


import math

def thanos(A, p, q):

	def is_sorted(A, p, q):
		start = A[p]
		for index in range(p, q + 1):
			if A[index] < start:
				return False
			start = A[index]
		return True
	if p == q:
		return 1
	if is_sorted(A, p, q):
		return q - p + 1
	return max(thanos(A, p, (p + q) // 2), thanos(A, (p + q) // 2 + 1, q))
n = int(input())
A = [int(x) for x in input().split()]
print(thanos(A, 0, len(A) - 1))


def is_sorted(seq):
	prev = None
	for cur in seq:
		if not (prev is None or cur >= prev):
			return False
		prev = cur
	return True

def max_sorted_len(seq):
	block_len = len(seq)
	while block_len > 1:
		for i in range(0, len(seq), block_len):
			if is_sorted(seq[i:i + block_len]):
				return block_len
		block_len //= 2
	return block_len

def run_io():
	param = map(int, input().split())
	seq = map(int, input().split())
	seq = list(seq)
	max_len = max_sorted_len(seq)
	print(max_len)
run_io()


n = int(input())
nums = list(map(int, input().split()))

def thanos_sort(arr):
	if arr == sorted(arr):
		return len(arr)
	return max(thanos_sort(arr[len(arr) // 2:]), thanos_sort(arr[:len(arr) // 2]))
print(thanos_sort(nums))


def tan(a):
	if sorted(a) == a:
		return len(a)
	else:
		z = int(len(a) / 2)
		l = a
		r = a
		if tan(r[z:]) > tan(l[:z]):
			return tan(r[z:])
		else:
			return tan(l[:z])
n = input()
q = input().split()
mas = []
for i in range(0, len(q)):
	mas.append(int(q[i]))
print(tan(mas))


def thanos(li, len_li):
	if li[:] == sorted(li):
		return len_li
	return max(thanos(li[:len_li // 2], len_li // 2), thanos(li[len_li // 2:], len_li // 2))
n = int(input())
s = list(map(int, input().split()))
print(thanos(s, n))


def is_sorted(arr):
	for i in range(1, len(arr)):
		if arr[i] < arr[i - 1]:
			return False
	return True

def thanos_sort(arr):
	n = len(arr)
	if is_sorted(arr):
		return n
	else:
		middle = n // 2
		res = max(thanos_sort(arr[0:middle]), thanos_sort(arr[middle:]))
		return res

def solve(arr):
	return thanos_sort(arr)

def main():
	_ = int(input())
	arr = list(map(int, input().split()))
	print(solve(arr))
main()


from collections import Counter, defaultdict, deque
from math import *
import sys
input = sys.stdin.readline

def rec(a):
	n = len(a)
	if a == sorted(a):
		return n
	return max(rec(a[:n // 2]), rec(a[n // 2:]))

def solve():
	n = int(input())
	arr = [int(x) for x in input().split()]
	print(rec(arr))
tt = 1
for test in range(tt):
	solve()


def isSorted(aList):
	v = 0
	for x in aList:
		if x < v:
			return 0
		v = x
	return 1

def rec(aList):
	if isSorted(aList):
		return len(aList)
	length = len(aList)
	return max(rec(aList[0:int(length / 2)]), rec(aList[int(length / 2):]))
count = int(input())
listItem = [int(n) for n in input().split()]
print(rec(listItem))


def is_sorted(ls):
	for i in range(1, len(ls)):
		if ls[i - 1] > ls[i]:
			return False
	return True

def max_sorted_len(ls):
	n = len(ls)
	if is_sorted(ls):
		return n
	else:
		return max(max_sorted_len(ls[:n // 2]), max_sorted_len(ls[n // 2:]))
n = int(input())
ls = list(map(int, input().split()))
print(max_sorted_len(ls))


n = int(input())
s = input().split()

def sorting(s):
	if len(s) == 1:
		return 1
	i = 0
	while int(s[i]) <= int(s[i + 1]):
		if i == len(s) - 2:
			i = len(s)
			break
		else:
			i = i + 1
	if i == len(s):
		return i
	elif sorting(s[:len(s) // 2]) > sorting(s[len(s) // 2:]):
		return sorting(s[0:len(s) // 2])
	else:
		return sorting(s[len(s) // 2:len(s)])
print(sorting(s))


def sosite(a):
	sortd = True
	if len(a) == 1:
		return 1
	if len(a) == 2:
		if a[0] <= a[1]:
			return 2
		else:
			return 1
	q = a[0]
	for i in a:
		if q > i:
			sortd = False
		q = i
	if sortd:
		return len(a)
	else:
		return max(sosite(a[:len(a) // 2]), sosite(a[len(a) // 2:]))
n = input()
print(sosite(list(map(int, input().split()))))


n = int(input())
v = list(map(int, input().split()))

def f(l, r):
	i = l + 1
	while i <= r:
		if v[i] < v[i - 1]:
			break
		i += 1
	if i == r + 1:
		return r - l + 1
	mid = (r - l + 1) // 2
	return max(f(l, l + mid - 1), f(l + mid, r))
print(f(0, n - 1))


def thanos(l):
	if l == sorted(l):
		return len(l)
	else:
		return max(thanos(l[:len(l) // 2]), thanos(l[len(l) // 2:]))
input()
a = [int(x) for x in input().split()]
print(thanos(a))


n = int(input())
a = list(map(int, input().split()))
ans = -1
k = n
now = 0
while k > 0:
	for i in range(n // k):
		now = 1
		for j in range(1, k):
			if a[i * k + j] >= a[i * k + j - 1]:
				now += 1
			else:
				break
		if now == k:
			ans = max(ans, now)
	k //= 2
print(ans)


list_size = int(input())
sorting_list = list(map(int, input().split()))

def is_sorted(l: list) -> bool:
	for i in range(0, len(l) - 1):
		if l[i] > l[i + 1]:
			return False
	return True

def thanos_sort(sorting_list: list, list_size: int) -> list:
	if not is_sorted(sorting_list):
		sorted_list_1 = thanos_sort(sorting_list[0:list_size // 2], list_size // 2)
		sorted_list_2 = thanos_sort(sorting_list[list_size // 2:], list_size // 2)
		return sorted_list_1 if len(sorted_list_1) > len(sorted_list_2) else sorted_list_2
	else:
		return sorting_list
print(len(thanos_sort(sorting_list, list_size)))


def judge(array):
	n = len(array)
	if n == 1:
		return True
	else:
		flag = True
		for i in range(n):
			if i == n - 1:
				break
			elif int(array[i]) <= int(array[i + 1]):
				continue
			else:
				flag = False
		return flag

def recur(array):
	n = len(array)
	if n == 1:
		return 1
	elif judge(array):
		return n
	else:
		return max(recur(array[0:int(n / 2)]), recur(array[int(n / 2):n]))
n = int(input())
arr = input().split(' ')
b = []
for i in range(len(arr)):
	b.append(int(arr[i]))
print(recur(arr))


def solve(arr):
	global m
	t = arr.copy()
	t.sort()
	if arr == t:
		m = max(m, len(arr))
		return
	solve(arr[:len(arr) // 2])
	solve(arr[len(arr) // 2:])
n = int(input())
m = 0
arr = list(map(int, input().split()))
solve(arr)
print(m)


def check(l):
	for i in range(len(l) - 1):
		if l[i] > l[i + 1]:
			return 0
	return 1
n = int(input())
l = list(map(int, input().split()))
x = 0
i = n
while i > 0:
	p = 0
	k = 0
	while k < n:
		p = check(l[k:k + i])
		if p:
			x = i
			break
		k += i
	if p:
		break
	i //= 2
print(x)


n = int(input())
a = [int(ai) for ai in input().split()]

def solve(x):
	n = len(x)
	if sorted(x) == x:
		return n
	return max(solve(x[:n // 2]), solve(x[n // 2:]))
print(solve(a))


import math
n = int(input())
a = [int(n) for n in input().split()]
s = 0
for _ in range(4):
	if sorted(a) == a:
		s = len(a)
		break
	else:
		count1 = 0
		count2 = 0
		for i in range(len(a) // 2 - 1):
			if a[i] < a[i + 1]:
				count1 += 1
		for i in range(len(a) // 2, len(a) - 1):
			if a[i] < a[i + 1]:
				count2 += 1
		if count1 > count2:
			del a[len(a) // 2:len(a)]
		else:
			del a[0:len(a) // 2]
print(s)


def half_breaker(lst, n):
	list_length = len(lst)
	if len(lst) == n:
		lst_sorted = lst[:]
		lst_sorted.sort()
		if lst == lst_sorted:
			return n
	if len(lst) == 1:
		return 1
	elif len(lst) > 1:
		left_list = lst[0:list_length // 2]
		right_list = lst[list_length // 2:list_length]
		left_list_sorted = left_list[:]
		right_list_sorted = right_list[:]
		left_list_sorted.sort()
		right_list_sorted.sort()
		if left_list_sorted == left_list:
			return list_length // 2
		elif right_list_sorted == right_list:
			return list_length // 2
		else:
			return max(half_breaker(left_list, n), half_breaker(right_list, n))
n = int(input())
thanos_list = list(map(int, input().split()))[:]
print(half_breaker(thanos_list, n))


def solve(l1, r1):

	def rec(l, r):
		q = 0
		q1 = 0
		q2 = 0
		if l < r:
			i = l
			while i < r and a[i] <= a[i + 1]:
				i += 1
			if i == r:
				return r - l + 1
			else:
				md = (l + r) // 2
				q1 = rec(l, md)
				q2 = rec(md + 1, r)
		else:
			return 1
		q = max(q1, q2)
		return q
	print(rec(l1, r1))
n = int(input())
a = list(map(int, input().split()))
solve(0, n - 1)


def func(n, a):
	global res
	if n == 1:
		res = max(res, 1)
		return 0
	else:
		a1 = a[:n // 2]
		if a1 == list(sorted(a1)):
			res = max(res, n // 2)
		a2 = a[n // 2:]
		if a2 == list(sorted(a2)):
			res = max(res, n // 2)
		func(n // 2, a1)
		func(n // 2, a2)
n = int(input())
a = [int(x) for x in input().split()]
res = 0
func(n, a)
if a == list(sorted(a)):
	print(n)
else:
	print(res)


d = n = int(input())
a = [*map(int, input().split())]
r = 1
while d:
	for i in range(0, n, d):
		if sorted(a[i:i + d]) == a[i:i + d]:
			r = max(r, d)
	d >>= 1
print(r)


t = int(input())
ar = list(input().split())
arr = [int(i) for i in ar]
tmplist = []
if arr == sorted(arr):
	print(len(arr))
elif arr == sorted(arr, reverse=True):
	print(1)
else:
	tmpArr = [arr[i] for i in range(len(arr) // 2)]
	while tmpArr != sorted(tmpArr):
		if tmpArr == sorted(tmpArr):
			print(len(tmpArr))
			break
		else:
			tmpArr = [tmpArr[i] for i in range(len(tmpArr) // 2)]
	tmplist.append(len(tmpArr))
	tmpArr2 = [arr[i] for i in range(len(arr) // 2, len(arr))]
	while tmpArr2 != sorted(tmpArr2):
		tmpArr2 = [tmpArr2[i] for i in range(len(tmpArr2) // 2)]
	tmplist.append(len(tmpArr2))
	print(max(tmplist))


n = int(input())
s = list(map(int, input().split()))
if len(s) == 1:
	print('1')
else:

	def sort(n, s):
		if len(s) == 2 and s[0] <= s[1]:
			return 2
		elif len(s) == 2 and s[0] > s[1]:
			return 1
		for i in range(n - 1):
			if s[i] <= s[i + 1]:
				flag = True
			else:
				flag = False
				break
		if flag == True:
			return len(s)
		else:
			n /= 2
			n = int(n)
			return max(sort(n, s[:n]), sort(n, s[n:]))
	print(sort(n, s))


def isSorted(a, l, r):
	if r - l <= 1:
		return (True, 1) if r - l == 0 else (True, 2) if a[l] <= a[r] else (False, 1)
	m = (l + r) // 2
	ls = isSorted(a, l, m)
	rs = isSorted(a, m + 1, r)
	if ls[0] and rs[0]:
		return (True, r - l + 1) if a[m] <= a[m + 1] else (False, ls[1]) if ls[1] > rs[1] else (False, rs[1])
	elif ls[0]:
		return (False, ls[1])
	elif rs[0]:
		return (False, rs[1])
	else:
		return (False, ls[1] if ls[1] > rs[1] else rs[1])
n = int(input())
s = input().split()
a = list(map(int, s))
sa = isSorted(a, 0, n - 1)
print(sa[1])


def get_ans(_array, start, end):
	if sorted(_array[start:end]) == _array[start:end]:
		return end - start
	else:
		mid = end + start >> 1
		return max(get_ans(_array, start, mid), get_ans(_array, mid, end))

def main():
	n = int(input())
	_array = list(map(int, input().split()))
	print(get_ans(_array, 0, len(_array)))
main()


n = int(input())
a = list(map(int, input().split()))
i = 1
while (i - 1) ** 2 <= n:
	d = n // 2 ** (i - 1)
	for k in range(2 ** (i - 1)):
		b = a[k * d:(k + 1) * d]
		if b == list(sorted(b)):
			print(d)
			exit()
	i += 1


n = int(input())
numbers = list(map(int, input().split()))
s = 1
m = 0
while s <= n:
	for i in range(0, n, s):
		sublist = numbers[i:i + s]
		if sorted(sublist) == sublist:
			m = s
			break
	s *= 2
print(m)


n = int(input())
arr = [int(x) for x in input().split(' ')]

def func(arr):
	if sorted(arr) == arr:
		return len(arr)
	x = arr[:len(arr) // 2]
	y = arr[len(arr) // 2:]
	return max(func(x), func(y))
print(func(arr))


def issort(a=list(), le=0, rt=0, mn=set()):
	flag = True
	for i in range(le - 1, rt - 1):
		if a[i] > a[i + 1]:
			flag = False
	if flag:
		mn.add(rt - le + 1)
	if rt - le == 1:
		mn.add(1)
	else:
		issort(a, le, le - 1 + (rt - le + 1) // 2, mn)
		issort(a, le + (rt - le + 1) // 2, rt, mn)
n = int(input())
a = [int(s) for s in input().split()]
mn = set()
if len(a) > 1:
	issort(a, 1, len(a), mn)
	print(max(mn))
else:
	print(1)


def is_sorted(m):
	ans = True
	for i in range(1, len(m)):
		if m[i] < m[i - 1]:
			ans = False
			break
	return ans
n = int(input())
m = list(map(int, input().split(' ')))

def rec(m):
	if len(m) <= 1:
		return 1
	elif is_sorted(m):
		return len(m)
	else:
		return max(rec(m[:int(len(m) / 2)]), rec(m[int(len(m) / 2):]))
print(rec(m))


def is_sorted(array):
	if len(array) in [0, 1]:
		return True
	for i in range(len(array) - 1):
		if array[i] > array[i + 1]:
			return False
	return True

def solution(array):
	n = len(array)
	if is_sorted(array):
		return n
	l = array[:n // 2]
	r = array[n // 2:]
	return max(solution(l), solution(r))
n = int(input())
a = [int(x) for x in input().split()]
if is_sorted(a):
	print(n)
	exit(0)
print(solution(a))


import sys
n = int(sys.stdin.readline().strip())
A = list(map(int, sys.stdin.readline().strip().split()))
i = 0
while 2 ** i != n:
	i = i + 1
for j in range(0, i + 1):
	for k in range(0, i - j + 1):
		v = 1
		for l in range(k * 2 ** j, (k + 1) * 2 ** j - 1):
			if A[l] > A[l + 1]:
				v = 0
		if v == 1:
			ans = 2 ** j
print(ans)


import sys
n = int(sys.stdin.readline())
line = sys.stdin.readline().split()
nums = list(map(int, line))

def thanos_sort(nums, n):
	is_sort = True
	for i in range(1, n):
		if nums[i] < nums[i - 1]:
			is_sort = False
	if is_sort:
		return n
	else:
		l1 = thanos_sort(nums[:n // 2], n // 2)
		l2 = thanos_sort(nums[n // 2:], n // 2)
		return max(l1, l2)
print(thanos_sort(nums, n))


larr = []

def isSorted(arr):
	for i in range(len(arr) - 1):
		if arr[i] > arr[i + 1]:
			return False
	return True

def mergeSort(arr):
	if len(arr) > 1:
		mid = len(arr) // 2
		L = arr[:mid]
		R = arr[mid:]
		if isSorted(L):
			larr.append(len(L))
		if isSorted(R):
			larr.append(len(R))
		mergeSort(L)
		mergeSort(R)
	return larr
n = int(input())
lis = list(map(int, input().split()))
if isSorted(lis):
	print(len(lis))
else:
	print(max(mergeSort(lis)))


def issorted(arr, i, j):
	length = j - i
	for c in range(i + 1, j + 1):
		if arr[c] < arr[c - 1]:
			return False
	return True

def checksortable(arr, i, j):
	if issorted(arr, i, j):
		return int(j - i + 1)
	return int(max(checksortable(arr, i, int((j + i) / 2)), checksortable(arr, int((j + i) / 2) + 1, j)))

def main():
	n = int(input())
	l = [*map(int, input().split())]
	print(checksortable(l, 0, n - 1))
main()


n = int(input())
arr = list(map(int, input().split()))
ans = 1
size = 2
while size <= n:
	i = 0
	while i < n:
		j = i
		flag = 0
		while j < i + size - 1:
			if arr[j] <= arr[j + 1]:
				j += 1
			else:
				flag = 1
				break
		if flag == 0:
			ans = max(ans, size)
		i += size
	size = size * 2
print(ans)


import sys
sys.setrecursionlimit(1000000)

def func(n, *b):
	if sorted(b) == list(b):
		return n
	else:
		return max(func(n // 2, *b[:n // 2]), func(n // 2, *b[n // 2:]))
N = int(input())
a = list(map(int, input().split()))
print(func(N, *a))


n = int(input())
a = [int(i) for i in input().split()]
l = int(n)
s = 0
ans = 0
while l >= 1 and ans == 0:
	for s in range(0, n, l):
		if a[s:s + l] == sorted(a[s:s + l]):
			ans = l
	l = int(l / 2)
print(ans)


n = int(input())
l = list(map(int, input().split()))

def func(l, n):
	if sorted(l) == l:
		return n
	elif reversed(l) == sorted(l):
		return 1
	else:
		return max(func(l[:int(n / 2)], n // 2), func(l[int(n / 2):], n // 2))
print(func(l, n))


n = int(input())
arr = list(map(int, input().split()))
ans = 1

def is_sorted(M):
	return M == sorted(M)
while n != 1:
	for i in range(0, len(arr), n):
		if is_sorted(arr[i:i + n]):
			ans = n
			break
	if ans != 1:
		break
	n //= 2
print(ans)


import sys
n = int(input())
A = list(map(int, input().split()))
if A == sorted(A):
	print(n)
	sys.exit()
if A[:n // 2] == sorted(A[:n // 2]) or A[n // 2:] == sorted(A[n // 2:]):
	print(n // 2)
	sys.exit()
if A[:n // 4] == sorted(A[:n // 4]) or A[n // 4:n // 2] == sorted(A[n // 4:n // 2]) or A[n // 2:n // 4 * 3] == sorted(A[n // 2:n // 4 * 3]) or (A[n // 4 * 3:] == sorted(A[n // 4 * 3:])):
	print(n // 4)
	sys.exit()
if A[:n // 8] == sorted(A[:n // 8]) or A[n // 8:n // 4] == sorted(A[n // 8:n // 4]) or A[n // 4:n // 8 * 3] == sorted(A[n // 4:n // 8 * 3]) or (A[n // 8 * 3:n // 2] == sorted(A[n // 8 * 3:n // 2])):
	print(n // 8)
	sys.exit()
if A[n // 2:n // 8 * 5] == sorted(A[n // 2:n // 8 * 5]) or A[n // 8 * 5:n // 4 * 3] == sorted(A[n // 8 * 5:n // 4 * 3]) or A[n // 4 * 3:n // 8 * 7] == sorted(A[n // 4 * 3:n // 8 * 7]) or (A[n // 8 * 7:] == sorted(A[n // 8 * 7:])):
	print(n // 8)
	sys.exit()
print(1)


def check(x, l, r):
	st = True
	for i in range(l, r - 1):
		if x[i] > x[i + 1]:
			st = False
			break
	return r - l if st else max(check(x, l, (l + r) // 2), check(x, (l + r) // 2, r))
n = int(input().strip())
x = list(map(int, input().strip().split()))
print(check(x, 0, n))


def check(x, y):
	if sorted(x) == y:
		return True
	else:
		return False
f = False
y = 1
x = eval(input())
num = list(map(int, input().split()))
i = 0
numc = []
k = 0
while i < y:
	k = k
	j = 0
	while j < x / y:
		numc = numc + [num[k]]
		j += 1
		k += 1
	if check(numc, numc):
		print(len(numc))
		break
	elif not i + 1 < y:
		i = -1
		k = 0
		y *= 2
		numc = []
	numc = []
	i += 1


def sor(x):
	t = x[0]
	for i in x:
		if t > i:
			return False
		t = i
	return True
input()
x = list(map(int, input().split()))
ans = 0
for i in range(5):
	l = 1 << i
	for j in range(0, len(x) - l + 1, l):
		if sor(x[j:j + l]):
			ans = max(ans, l)
print(ans)


def is_decr(list1):
	decreasing = 0
	for i in range(1, len(list1), 1):
		if list1[i] - list1[i - 1] < 0:
			decreasing = 1
			break
		else:
			decreasing = 0
	return decreasing

def pop(decr, list1):
	if decr == 0:
		num = len(list1)
		return num
	else:
		a = check_list(list1[0:int(len(list1) / 2)])
		b = check_list(list1[int(len(list1) / 2):len(list1)])
		if a > b:
			return a
		else:
			return b

def check_list(list1):
	decr = is_decr(list1)
	return pop(decr, list1)
num = input()
list0 = input().split(' ')
list1 = []
for i in range(int(num)):
	list1.append(int(list0[i]))
print(check_list(list1))


def isSorted(a, start, end):
	for i in range(start + 1, end + 1):
		if a[i] < a[i - 1]:
			return False
	return True

def maxSub(a, start, end):
	if end - start == 0:
		return 1
	if isSorted(a, start, end) == True:
		return end - start + 1
	return max(maxSub(a, start, start + (end - start) // 2), maxSub(a, start + (end - start) // 2 + 1, end))
n = int(input())
a = list(map(int, input().strip().split()))
print(maxSub(a, 0, n - 1))


x = int(input())
arr = list(map(int, input().split()))

def max_sorted(arr):
	if len(arr) == 1:
		return 1
	if arr == sorted(arr):
		return len(arr)
	mid = int(len(arr) / 2)
	return max(max_sorted(arr[0:mid]), max_sorted(arr[mid:]))
print(max_sorted(arr))


def t_sort(arr):
	arrsort = sorted(arr)
	if arrsort == arr:
		return len(arr)
	return max(t_sort(arr[:int(len(arr) / 2)]), t_sort(arr[int(len(arr) / 2):]))
n = int(input())
arr = [int(x) for x in input().split(' ')]
print(t_sort(arr))


def sor(a, n):
	if a != sorted(a):
		return max(sor(a[:n // 2], n // 2), sor(a[n // 2:], n // 2))
	else:
		return n
n = int(input())
a = [int(i) for i in input().split()]
print(sor(a, n))


class pair:

	def __init__(self, l, r):
		self.l = l
		self.r = r
	l = 0
	r = 0

def get_max_length(l, r):
	global res
	if r - l <= 1:
		return pair(r - l, r - l)
	m = l + (r - l) // 2
	lres = get_max_length(l, m)
	rres = get_max_length(m, r)
	if a[m - 1] <= a[m]:
		res = max(res, lres.r + rres.l)
	return pair(lres.l, rres.r)
n = int(input())
res = min(1, n)
a = list(map(int, input().strip().split(' ')))
x = 0
while 1 << x <= n:
	for l in range(0, n, 1 << x):
		valid = True
		for i in range(l, l + (1 << x) - 1):
			if a[i] > a[i + 1]:
				valid = False
		if valid:
			res = max(res, 1 << x)
	x = x + 1
print(res)


def check(a):
	for i in range(1, len(a)):
		if a[i - 1] > a[i]:
			return -1
	return 1

def cal(a):
	if check(a) == 1:
		return len(a)
	m = len(a) // 2
	return max(cal(a[:m]), cal(a[m:]))
n = int(input())
a = [int(i) for i in input().split()]
print(cal(a))


n = int(input())
a = list(map(int, input().split()))

def sorted(m):
	ist = True
	for i in range(1, len(m)):
		if m[i] < m[i - 1]:
			ist = False
			break
	return ist
o = []

def sort(m):
	if not sorted(m):
		sort(m[:len(m) // 2])
		sort(m[len(m) // 2:])
	else:
		o.append(len(m))
sort(a)
print(max(o))


n = int(input())
a = input().split()
for j in range(n):
	a[j] = int(a[j])

def check(arr):
	if len(arr) == 1:
		return 1
	else:
		for i in range(len(arr) - 1):
			if arr[i] > arr[i + 1]:
				nn = len(arr)
				return max(check(arr[:int(nn / 2)]), check(arr[int(nn / 2):]))
		return len(arr)
print(check(a))


from collections import Counter
n = int(input())
a = list(map(int, input().split()))
i = n
while i != 0:
	x = n // i
	k = 0
	for j in range(x):
		if a[k:k + i] == sorted(a[k:k + i]):
			print(i)
			quit()
		k += i
	i //= 2


input()
N = [int(i) for i in input().split(' ')]

def solve(N):
	if len(N) == 1:
		return 1
	L = solve(N[:len(N) // 2])
	P = solve(N[len(N) // 2:])
	if L == len(N) / 2 and P == len(N) / 2 and (N[len(N) // 2] >= N[len(N) // 2 - 1]):
		return len(N)
	return max(L, P)
print(solve(N))


allArray = []

def isSorted(array):
	i = 1
	if len(array) < 2:
		return 1
	while i < len(array):
		if int(array[i]) < int(array[i - 1]):
			return 0
		i += 1
	return 1

def Thanos_sort(array):
	global allArray
	if isSorted(array):
		allArray.append(array)
	else:
		Thanos_sort(array[:int(len(array) / 2)])
		Thanos_sort(array[int(len(array) / 2):int(len(array))])
size = input()
numberStr = input()
Thanos_sort(numberStr.split(' '))
print(len(max(allArray, key=lambda x: len(x))))


input()
m = int(1)
a = [*map(int, input().split())]
while any((a[i:i + m] == sorted(a[i:i + m]) for i in range(0, len(a), m))) and m <= len(a):
	m *= 2
print(m // 2)


input()
s = list(map(int, input().split()))

def f(x):
	if len(x) == 1:
		return 1
	elif len(x) == 2:
		if x[0] < x[1]:
			return 2
		else:
			return 1
	elif x == sorted(x):
		return len(x)
	elif x == sorted(x)[::-1]:
		return 1
	else:
		p = x[:len(x) // 2]
		q = x[len(x) // 2:]
		return max(f(p), f(q))
print(f(s))


def maxim(l, r, arr):
	b = True
	for i in range(l, r):
		if arr[i] > arr[i + 1]:
			b = False
	if b:
		return r - l + 1
	mid = (l + r) // 2
	a = maxim(l, mid, arr)
	c = maxim(mid + 1, r, arr)
	return max(a, c)
n = int(input())
arr = [int(i) for i in input().split()]
count = maxim(0, n - 1, arr)
print(count)


def check(A, strt, n):
	if strt >= len(A):
		return 0
	lnt = n
	for i in range(n - 1):
		if A[strt + i] > A[strt + i + 1]:
			lnt = 0
	return max(lnt, check(A, strt + n, n))
n = int(input())
x = [int(i) for i in input().split()]
lnt = 1
while n > 1:
	lnt = max(lnt, check(x, 0, n))
	n = n // 2
print(lnt)


class static:

	def __init__(self):
		self.a = 0

def batao(n, arr, k):
	c = 0
	for i in range(n - 1):
		if arr[i] <= arr[i + 1]:
			c += 1
	if c == n - 1:
		if k.a < c + 1:
			k.a = c + 1
	elif c == 0:
		if k.a == 0:
			k.a = 1
	else:
		batao(n // 2, arr[0:n // 2], k)
		batao(n // 2, arr[n // 2:n], k)
n = int(input())
arr = list(map(int, input().split()))
k = static()
batao(n, arr, k)
print(k.a)


def tanos(a, b=0):
	l = len(a)
	if (a == sorted(a)) & (b <= l):
		b = l
		return b
	elif a:
		b = tanos(a[:l // 2], b)
		if b != l // 2:
			b = tanos(a[l // 2:], b)
		return b
	else:
		return 1
n = int(input())
num = map(int, input().split(' '))
a = list(num)
print(tanos(a))


def tanos(a1):
	if a1 == sorted(a1):
		return len(a1)
	return max(tanos(a1[int(len(a1) / 2):]), tanos(a1[:int(len(a1) / 2)]))
n = input()
arr = list(map(int, input().split()))
print(tanos(arr))


n = int(input())
if n >= 1 and n <= 16:
	string = [int(num) for num in input().split(' ', n - 1) if 1 <= int(num) <= 100]
while True:
	if sorted(string) == string:
		print(len(string))
		break
	elif len(string) % 2 != 0:
		if string[:n // 2] == sorted(string[:n // 2]) or string[n // 2:] == sorted(string[n // 2:]):
			print(len(string[:n // 2]))
			break
		else:
			del string[:n // 2]
			n //= 2
	elif string[:n // 2] == sorted(string[:n // 2]) or string[n // 2:] == sorted(string[n // 2:]):
		print(len(string[:n // 2]))
		break
	else:
		del string[:n // 2]
		n //= 2


import math
n = int(input())
arr = list(map(int, input().split()))
stat = [1]
for i in range(n - 1):
	if arr[i] > arr[i + 1]:
		stat.append(i + 2)
stat.append(n + 1)
maxlen = 1
for i in range(len(stat) - 1):
	l = pow(2, int(math.log(stat[i + 1] - stat[i], 2)))
	while l > 0:
		last = l * ((stat[i + 1] - 1) // l)
		if last - l + 1 >= stat[i]:
			if l > maxlen:
				maxlen = l
			break
		else:
			l = l // 2
print(maxlen)


n = int(input())
inp_array = [[int(x) for x in input().split()]]

def thanosSort(array):
	new_array = []
	for i in array:
		if sorted(i) == i:
			out = len(i)
			return out
	for i in array:
		new_array.append(i[:int(len(i) / 2)])
		new_array.append(i[int(len(i) / 2):])
	array = new_array
	return thanosSort(array)
print(thanosSort(inp_array))


def solve(left, right, arr):
	if left + 1 == right:
		return 1
	return right - left if arr[left:right] == sorted(arr[left:right]) else max(solve(left, (left + right) // 2, arr), solve((right + left) // 2, right, arr))
(length, a) = (int(input()), list(map(int, input().split())))
print(solve(0, length, a))


def thanos(l):
	if l == sorted(l):
		return len(l)
	else:
		m = len(l) // 2
		m1 = thanos(l[:m])
		m2 = thanos(l[m:])
		return max(m1, m2)
n = int(input())
arr = list(map(int, input().split()))
print(thanos(arr))


def checksort(left, right, a):
	(i, flag) = (left, True)
	while i < right:
		if a[i] > a[i + 1]:
			flag = False
		i += 1
	return flag

def thanos(left, right, a):
	if checksort(left, right, a):
		return right - left + 1
	else:
		mid = (left + right) // 2
		p = thanos(left, mid, a)
		q = thanos(mid + 1, right, a)
		return max(p, q)
n = int(input())
a = [int(x) for x in input().split()]
k = thanos(0, n - 1, a)
print(k)


def isSorted(arr):
	for i in range(len(arr)):
		arr[i] = int(arr[i])
	err = sorted(arr)
	return arr == err
n = input()
arr = []
arr = input().split()
err = []
zrr = arr
arr2 = arr
zrr2 = arr
xrr = []
while not isSorted(arr) and (not isSorted(zrr)) and (not isSorted(arr2)) and (not isSorted(zrr2)):
	err = arr[0:int(len(arr) / 2)]
	err2 = arr[int(len(arr) / 2):]
	xrr2 = zrr[0:int(len(zrr) / 2)]
	xrr = zrr[int(len(zrr) / 2):]
	arr = err
	zrr = xrr
	arr2 = err2
	zrr2 = xrr2
l1 = len(arr)
l2 = len(zrr)
l3 = len(arr2)
l4 = len(zrr2)
print(max(l1, l2, l3, l4))


import sys
from bisect import bisect_left, bisect_right
from collections import deque
inf = float('inf')
mod = 1000000007

def binary(number):
	result = 0
	while number:
		result = result + 1
		number = number & number - 1
	return result

def get_array():
	return list(map(int, sys.stdin.readline().split()))

def get_ints():
	return map(int, sys.stdin.readline().split())

def is_sorted(array):
	tmp = sorted(array)
	return array == tmp

def bs(array):
	if is_sorted(array):
		return len(array)
	mid = len(array) // 2
	left = bs(array[0:mid])
	right = bs(array[mid:])
	return max(left, right)

def main():
	n = int(input())
	array = get_array()
	ret = bs(array)
	print(ret)
main()


n = int(input())
A = input().split()
B = [1]
for i in range(1, n):
	if int(A[i]) >= int(A[i - 1]):
		B.append(1)
	else:
		B.append(0)
s = 1
for i in [2, 4, 8, 16]:
	k = 0
	while k + i <= n:
		C = B[k:k + i]
		if not 0 in C:
			s = i
			break
		else:
			k += i
print(s)


def helper(f, t, nums):
	if t == f:
		return 1
	if nums[f:t + 1] == sorted(nums[f:t + 1]):
		return t - f + 1
	mid = f + int((t - f) / 2)
	return max(helper(f, mid, nums), helper(mid + 1, t, nums))
n = int(input())
arr = [int(item) for item in input().strip().split()]
print(helper(0, n - 1, arr))


n = int(input())

def fonction(L):
	if len(L) == 1:
		return 1
	elif sorted(L) == L:
		return len(L)
	else:
		m = fonction(L[:len(L) // 2])
		d = fonction(L[len(L) // 2:])
		return max(m, d)
L = [int(x) for x in input().split()]
print(fonction(L))


input()
a = list(map(int, input().split()))

def is_sort(a):
	return sorted(a) == a
n = len(a)
d = n
while d:
	for i in range(0, n, d):
		if is_sort(a[i:i + d]):
			print(d)
			exit()
	d >>= 1


input()
arr = [*map(int, input().split())]
res = []

def Thanos(list):
	if list == sorted(list):
		res.append(len(list))
	else:
		mid = len(list) // 2
		first_part = list[:mid]
		second_part = list[mid:]
		Thanos(first_part)
		Thanos(second_part)
Thanos(arr)
print(max(res))


a = input()
b = input()
b = b.split()
for i in b:
	b[b.index(i)] = int(i)
h = b[:]
h.sort()
if b == h:
	print(len(b))
else:
	ss = 0
	b = [b[:int(len(b) / 2)]] + [b[int(len(b) / 2):]]
	liste = b[:]
	a = False
	while len(b[0]) > ss:
		if len(b[0]) == 1:
			break
		for i in b:
			p = i[:]
			p.sort()
			if i == p:
				ss = len(i)
				a = True
				zz = len(i)
				break
			h = int(len(i) / 2)
			j = liste.index(i)
			liste.pop(j)
			liste.insert(j, i[:h])
			liste.insert(j + 1, i[h:])
		b = liste[:]
	if a == True:
		print(zz)
	else:
		print(len(b[0]))


def is_sorted(A):
	for i in range(len(A) - 1):
		if A[i + 1] < A[i]:
			return False
	return True

def remove_first_half(A, n):
	return A[int(n / 2):]

def remove_second_half(A, n):
	return A[:int(n / 2)]

def thanos_sort(A, n):
	if is_sorted(A) == True:
		return n
	else:
		return max(thanos_sort(remove_second_half(A, n), int(n / 2)), thanos_sort(remove_first_half(A, n), int(n / 2)))
n = int(input())
A = list(input().split())
A = list(map(int, A))
print(thanos_sort(A, n))


maxLenght = 0

def shelk(arr):
	global maxLenght
	if sorted(arr) == arr:
		maxLenght = max(maxLenght, len(arr))
	else:
		shelk(arr[:len(arr) // 2])
		shelk(arr[len(arr) // 2:])
_ = input()
array = list(map(int, input().split(' ')))
shelk(array)
print(maxLenght)


t = int(input())
a = list(map(int, input().split()))
flag = 0
i = 1
while flag == 0:
	if sorted(a) == a:
		print(len(a))
		flag = 1
		break
	else:
		b = []
		xyz = int(len(a) / 2 ** i)
		for xx in range(i):
			for xx in range(2 * i):
				b.append(a[xx * xyz:(xx + 1) * xyz])
		for j in b:
			if sorted(j) == j:
				print(len(j))
				flag = 1
				break
		if flag == 0:
			i += 1


import copy
n = int(input(''))
t = list(map(int, input('').split()))
c = 0
q = []
s = copy.deepcopy(t)

def work(a):
	if sorted(a) == a:
		q.append(len(a))
	else:
		p = []
		r = []
		p = a[:int(len(a) / 2)]
		r = a[int(len(a) / 2):]
		work(p)
		work(r)
work(s)
print(max(q))


b = []

def sol(a):
	if a == sorted(a):
		b.append(len(a))
		return 0
	return (sol(a[:len(a) // 2]), sol(a[len(a) // 2:]))
input()
sol(list(map(int, input().split())))
print(max(b))


n = int(input())
vals = map(int, input().split())
vals = list(vals)

def isSorted(arr):
	for i in range(len(arr) - 1):
		if arr[i] > arr[i + 1]:
			return False
	return True

def steps(arr):
	length = len(arr)
	if isSorted(arr):
		return length
	else:
		return max(steps(arr[:(length + 1) // 2]), steps(arr[length // 2:]))
print(steps(vals))


n = int(input())
data = [int(i) for i in input().split()]

def s(a, b):
	for i in range(a, b - 1):
		if data[i] > data[i + 1]:
			return False
	return True
import sys
ans = n
while ans > 0:
	for st in range(0, n, ans):
		if s(st, st + ans):
			print(ans)
			sys.exit()
	ans >>= 1


def func(arr):
	n = len(arr)
	maxxi = 1
	count = 1
	for i in range(0, n - 1):
		if arr[i] < arr[i + 1]:
			count += 1
		if arr[i] > arr[i + 1]:
			if count > maxxi:
				maxxi = count
			count = 1
	if count > maxxi:
		maxxi = count
	return maxxi
n = int(input())
arr = list(map(int, input().split()))
while n > 0:
	n = n // 2
	mid = n
	arr1 = arr[:]
	arr1.sort()
	if arr == arr1:
		break
	if func(arr[:mid]) > func(arr[mid:]):
		arr = arr[:mid]
	else:
		arr = arr[mid:]
print(len(arr))


def thsort(arr, n):
	if arr == sorted(arr):
		return n
	else:
		return max(thsort(arr[:n // 2], n // 2), thsort(arr[n // 2:], n // 2))
n = int(input())
arr = list(map(int, input().split()))
print(thsort(arr, n))


import math
n = int(input())
a = list(map(int, input().split()))
l = [(1, 1, 1)]
current = 1
for i in range(1, n):
	if a[i] >= a[i - 1]:
		current += 1
	else:
		current = 1
	x = i + 1
	p = 1
	if x % 2 == 0:
		p = 2 * l[x // 2 - 1][1]
	p2 = 1
	while current >= p2 * 2 and p2 < p:
		p2 *= 2
	l.append((current, p, p2))
maxp = list(map(lambda e: e[2], l))
print(max(maxp))


from sys import stdin
inp = lambda : int(stdin.readline().strip())
lip = lambda : [int(i) for i in stdin.readline().strip().split(' ')]
sip = lambda : stdin.readline().strip()
n = inp()
arr = lip()

def is_sorted(arr, i, j):
	for k in range(i, j):
		if arr[k] > arr[k + 1]:
			return False
	return True

def get_max(arr, i, j):
	if j - i <= 0:
		return 1
	if is_sorted(arr, i, j):
		return j - i + 1
	m = (j + i) // 2
	return max(get_max(arr, i, m), get_max(arr, m + 1, j))
print(get_max(arr, 0, n - 1))


n = int(input())
a = [int(i) for i in input().split()]
m = n
while m > 0:
	b = []
	for i in range(0, n + 1, m):
		b.append(i)
	for i in range(len(b) - 1):
		found = False
		for j in range(b[i], b[i + 1] - 1):
			if a[j] > a[j + 1]:
				found = True
				break
		if found == False:
			print(m)
			m = 0
			break
	m //= 2


result = []

def solve(m):
	if len(m) == 1:
		result.append(1)
		return 1
	else:
		s = 1
		for i in range(0, len(m) - 1):
			if m[i] > m[i + 1]:
				break
			else:
				s += 1
		if s == len(m):
			result.append(s)
			return 1
		solve(m[0:int(len(m) / 2)])
		solve(m[int(len(m) / 2):len(m)])

def main():
	n = int(input())
	m = list(map(int, input().split()))
	solve(m)
	print(max(result))
main()


def check(lst):
	for i in range(1, len(lst)):
		if lst[i - 1] > lst[i]:
			return False
	return True
n = int(input())
lst = list(map(int, input().split()))
ans = 0
xx = [16, 8, 4, 2, 1]
for i in xx:
	j = 0
	while j < 16:
		ss = lst[j:j + i]
		if check(ss):
			ans = max(ans, len(ss))
		j += i
print(ans)


from sys import stdin
n = int(input())
l = list(map(int, stdin.readline().split()))
l1 = sorted(l)
if l == l1:
	print(n)
else:
	i = 2
	ans = True
	while i <= n:
		k = n // i
		for j in range(0, n - k + 1, k):
			if l[j:j + k] == sorted(l[j:j + k]):
				print(k)
				ans = False
				break
		if ans == False:
			break
		i *= 2


n = int(input())
x = [int(i) for i in input().split()]
if x == sorted(x):
	print(n)
elif x[:int(n / 2)] == sorted(x[:int(n / 2)]) or x[int(n / 2):] == sorted(x[int(n / 2):]):
	print(int(n / 2))
elif x[:int(n / 4)] == sorted(x[:int(n / 4)]) or x[int(n / 4):int(n / 2)] == sorted(x[int(n / 4):int(n / 2)]) or x[int(n / 2):int(3 * n / 4)] == sorted(x[int(n / 2):int(3 * n / 4)]) or (x[int(3 * n / 4):] == sorted(x[int(3 * n / 4):])):
	print(int(n / 4))
else:
	(m, count) = (0, 0)
	while m <= 16:
		if x[m] <= x[m + 1]:
			print(2)
			break
		else:
			m += 2
			count += 1
	if count == 8:
		print(1)


n = int(input())
a = list(map(int, input().split()))

def func(a):
	for i in range(len(a) - 1):
		if a[i] > a[i + 1]:
			if i < int(len(a) / 2):
				del a[:int(len(a) / 2)]
			else:
				del a[int(len(a) / 2):]
			return func(a)
	return len(a)
b = func(a)
print(b)


import math
(n, t, ok) = (int(input()), list(map(int, input().split())), 1)
for i in range(int(math.log2(len(t))), -1, -1):
	if ok:
		x = 0
		while x != len(t):
			t2 = t[x:x + 2 ** i]
			if t2 == sorted(t2):
				print(len(t2))
				ok = 0
				break
			x += 2 ** i


def rty(ar, st, nd):
	if nd - st < 0:
		return 0
	elif nd - st == 0:
		return 1
	elif nd - st == 1:
		if ar[nd] >= ar[st]:
			return 2
		else:
			return 0
	else:
		if nd % 2 == 1:
			k1 = rty(ar, st, (st + nd) // 2)
			k2 = rty(ar, (st + nd) // 2 + 1, nd)
			if k1 - 1 == (st + nd) // 2 - st and k2 - 1 == nd - ((st + nd) // 2 + 1) and (ar[(st + nd) // 2] <= ar[(st + nd) // 2 + 1]):
				k = k1 + k2
			else:
				k = max(k1, k2)
		else:
			k1 = rty(ar, st, (st + nd) // 2)
			k2 = rty(ar, (st + nd) // 2, nd)
			if k1 == (st + nd) // 2 - st and k2 == nd - (st + nd) // 2 and (ar[(st + nd) // 2] <= ar[(st + nd) // 2 + 1]):
				k = k1 + k2
			else:
				k = max(k1, k2)
		return k
n = int(input())
ar = list(map(int, input().split(' ')))
k = rty(ar, 0, n - 1)
if k == 0:
	k += 1
print(k)


def is_sorted(arr):
	if arr == sorted(arr):
		return len(arr)
	return max(is_sorted(arr[:len(arr) // 2]), is_sorted(arr[len(arr) // 2:]))
n = int(input())
ns = list(map(int, input().split()))
print(is_sorted(ns))


n = int(input())
l = list(map(int, input().split()))
res = []

def thanos_sort(l):
	if sorted(l) == l:
		res.append(len(l))
	else:
		thanos_sort(l[:len(l) // 2])
		thanos_sort(l[len(l) // 2:])
thanos_sort(l)
print(max(res))


import math

def f(a):
	q = 1
	for j in range(len(a) - 1):
		if a[j] <= a[j + 1]:
			pass
		else:
			return 0
	return q
t = int(input())
a = list(map(int, input().split()))
j = t
n = 0
while j >= 2:
	k = 0
	while k < t:
		b = a[k:k + j]
		if f(b) == 1:
			n = 1
			break
		k += j
	if n == 1:
		e = j
		break
	j = j // 2
if n == 1:
	print(e)
else:
	print(1)


s = lambda l: all((l[i] <= l[i + 1] for i in range(len(l) - 1)))

def f(l):
	if s(l):
		return len(l)
	return max(f(l[:len(l) // 2]), f(l[len(l) // 2:]))
n = int(input())
l = [*map(int, input().split())]
print(f(l))


n = int(input())
x = input()
xx = x.split()
for i in range(0, n):
	xx[i] = int(xx[i])
if n == 16:
	a = [xx]
	b = []
	for i in range(0, 8):
		b.append(xx[i])
	a.append(b)
	b = []
	for i in range(8, 16):
		b.append(xx[i])
	a.append(b)
	b = []
	for i in range(0, 4):
		b.append(xx[i])
	a.append(b)
	b = []
	for i in range(4, 8):
		b.append(xx[i])
	a.append(b)
	b = []
	for i in range(8, 12):
		b.append(xx[i])
	a.append(b)
	b = []
	for i in range(12, 16):
		b.append(xx[i])
	a.append(b)
	p = 0
	for i in a:
		b = i[:]
		i.sort()
		if b == i:
			p = len(i)
			break
	if p == 0:
		for i in range(0, n - 1, 2):
			if xx[i + 1] >= xx[i]:
				p = 2
				break
		if p == 0:
			p = 1
	print(p)
elif n == 8:
	a = [xx]
	b = []
	for i in range(0, 4):
		b.append(xx[i])
	a.append(b)
	b = []
	for i in range(4, 8):
		b.append(xx[i])
	a.append(b)
	p = 0
	for i in a:
		b = i[:]
		i.sort()
		if b == i:
			p = len(i)
			break
	if p == 0:
		for i in range(0, n - 1, 2):
			if xx[i + 1] >= xx[i]:
				p = 2
				break
		if p == 0:
			p = 1
	print(p)
elif n == 4:
	a = [xx]
	b = []
	for i in range(0, 2):
		b.append(xx[i])
	a.append(b)
	b = []
	for i in range(2, 4):
		b.append(xx[i])
	a.append(b)
	p = 0
	for i in a:
		b = i[:]
		i.sort()
		if b == i:
			p = len(i)
			break
	if p == 0:
		print(1)
	else:
		print(p)
elif n == 2:
	if xx[1] >= xx[0]:
		print(2)
	else:
		print(1)
else:
	print(1)


n = int(input())
ai = list(map(int, input().split()))
a_cp = ai.copy()
a_cp.sort()
if a_cp == ai:
	print(len(ai))
	exit()
else:
	a_cp.sort(reverse=True)
	if a_cp == ai:
		print(1)
		exit()

def equal(n, m):
	for i in range(len(n)):
		if n[i] != m[i]:
			return False
	return True

def f(n):
	x = len(n)
	y = x // 2
	new = n[:]
	new_sort = new[:y]
	new_sort.sort()
	new_n = n[:y]
	if x == 1:
		return 1
	elif equal(new_sort, new_n):
		return y
	else:
		return f(n[y:])

def f2(n):
	x = len(n)
	y = x // 2
	new = n[:]
	new_sort = new[y:]
	new_sort.sort()
	new_n = n[y:]
	if x == 1:
		return 1
	elif equal(new_sort, new_n):
		return y
	else:
		return f2(n[:y])
if f(ai) < f2(ai):
	print(f2(ai))
else:
	print(f(ai))


def f(a):
	if sorted(a) == a:
		return len(a)
	k = len(a) // 2
	return max(f(a[:k]), f(a[k:]))
n = input()
a = [int(i) for i in input().split()]
print(f(a))


list_len = int(input())
list = [int(x) for x in input().split()]
max_len = 0

def thanos_sort(l):
	global max_len
	if len(l) == 1:
		if len(l) > max_len:
			max_len = len(l)
			return 1
	if len(l) == 0:
		return 0
	if l == sorted(l):
		if len(l) > max_len:
			max_len = len(l)
	else:
		thanos_sort(l[:len(l) // 2])
		thanos_sort(l[len(l) // 2:])
thanos_sort(list)
print(max_len)


N = int(input())
inp = input()
arr = list(map(int, inp.split(' ')))

def is_sorted(arr):
	for i in range(1, len(arr)):
		if arr[i - 1] > arr[i]:
			return False
	return True

def snap(arr):
	n = len(arr)
	mid = n // 2
	if is_sorted(arr):
		return n
	else:
		return max(snap(arr[:mid]), snap(arr[mid:]))
print(snap(arr))


def isSorted(a):
	x = len(a) - 1
	for i in range(x):
		if a[i] > a[i + 1]:
			return False
	return True

def thanos_rec(a, n):
	if n <= 0:
		return 0
	if isSorted(a):
		return len(a)
	else:
		l = thanos_rec(a[int(n // 2):], int(n // 2))
		r = thanos_rec(a[:int(n // 2)], int(n // 2))
	return max(l, r)
n = int(input())
a = list(map(int, input().split(' ')))
print(thanos_rec(a, n))


import sys
n = int(input())
a = list(map(int, input().split()))

def check(s, l):
	for i in range(s, s + l - 1):
		if a[i + 1] < a[i]:
			return False
	return True
k = n
while k > 0:
	for i in range(0, n, k):
		if check(i, k):
			print(k)
			sys.exit()
	k //= 2


import sys
input = lambda : sys.stdin.readline().rstrip()
n = int(input())
a = list(map(int, input().split()))
while True:
	k = False
	for i in range(n - 1):
		if a[i] > a[i + 1]:
			if n // 2 <= i:
				a = a[:n // 2]
				n //= 2
				k = True
			else:
				a = a[n // 2:]
				n //= 2
				k = True
			break
	if not k:
		break
print(len(a))


def check_array_sorting(array):
	is_sorted = True
	(i, j) = (0, len(array) - 1)
	while i < j:
		if array[i] > array[i + 1]:
			is_sorted = False
		i += 1
	return is_sorted

def get_maximum_sorted_array_lenght(array, max_size):
	array_lenght = len(array)
	half = array_lenght >> 1
	max_lenght = 0
	if array_lenght == 1:
		max_lenght = 1
	elif len(array) < max_size:
		max_lenght = max_size
	elif check_array_sorting(array):
		max_lenght = array_lenght
	else:
		left_max = get_maximum_sorted_array_lenght(array[half:], max_size)
		right_max = get_maximum_sorted_array_lenght(array[:half], max_size)
		max_lenght = max(left_max, right_max)
	return max_lenght
n = int(input().strip())
input_array = list(map(int, input().strip().split(' ')))
max_lenght = get_maximum_sorted_array_lenght(input_array, 1)
print(max_lenght)


class Thanos:

	def __init__(self):
		self.max = 1

	def snap(self, array):
		if len(array) <= self.max:
			return False
		if sorted(array) == array:
			self.max = len(array)
		else:
			half = len(array) // 2
			self.snap(array[:half])
			self.snap(array[half:])
length = int(input())
array = list(map(int, input().split()))
thanos = Thanos()
thanos.snap(array)
print(thanos.max)