Harryxun/sft_time huggingface dataset:
### BUGGY CODE ###


def main():
    import sys

    def MI():
        return map(int, sys.stdin.readline().rstrip().split())

    def LI():
        return list(map(int, sys.stdin.readline().rstrip().split()))  # 空白あり

    N, K = MI()
    A = LI()
    A.sort()

    def f(n):  # Anが必要か否か
        B = [0] + [A[i] for i in range(N) if i != n]
        dp = [[0] * K for _ in range(2)]  # dp[i][j] = B1~Biを用いてjを作れるか(メモリ節約のため工夫してる)
        dp[0][0] = 1
        for i in range(1, N):
            b = B[i]
            if i % 2 == 1:
                for j in range(K):
                    if j >= b:
                        dp[1][j] = dp[0][j] | dp[0][j - b]
                    else:
                        dp[1][j] = dp[0][j]
            else:
                for j in range(K):
                    if j >= b:
                        dp[0][j] = dp[1][j] | dp[1][j - b]
                    else:
                        dp[0][j] = dp[1][j]
        if sum(dp[(N - 1) % 2][j] for j in range(max(K - A[n], 0), K)) != 0:
            return True
        else:
            return False

    left = -1  # 不必要
    right = N  # 必要
    while left + 1 < right:
        mid = (left + right) // 2
        if f(mid):
            right = mid
        else:
            left = mid

    print(right)


if __name__ == '__main__':
    main()


### FIXED CODE ###

import sys

def MI(): return map(int,sys.stdin.readline().rstrip().split())
def LI(): return list(map(int,sys.stdin.readline().rstrip().split()))  #空白あり


N,K = MI()
A = LI()
A.sort()


def f(n):  # Anが必要か否か
    B = [0] + [A[i] for i in range(N) if i != n]
    dp = [[0]*K for _ in range(2)]  # dp[i][j] = B1~Biを用いてjを作れるか(メモリ節約のため工夫してる)
    dp[0][0] = 1
    for i in range(1,N):
        b = B[i]
        for j in range(K):
            if j >= b:
                dp[i%2][j] = dp[1-i%2][j] | dp[1-i%2][j-b]
            else:
                dp[i%2][j] = dp[1-i%2][j]
    if sum(dp[(N-1) % 2][j] for j in range(max(K-A[n],0),K)) != 0:
        return True
    else:
        return False


left = -1  # 不必要
right = N  # 必要
while left + 1 < right:
    mid = (left + right)//2
    if f(mid):
        right = mid
    else:
        left = mid

print(right)
### BUGGY CODE ###

n,p = map(int,input().split())
s = [int(c) for c in input()] 
num = 0
ans = 0
if p == 2 or p == 5:
	for i in range(n):
		if s[i]%p == 0:
			ans += i+1	
	print(ans)
	exit()
arr = [0]*p
s = s[::-1]
z = 1
t = 0
for ss in s:
	t = (t + z*ss)%p	
	z *=10 %p
	#print(t)
	arr[t] += 1
arr[0]+=1
for l in arr:
	ans += l * (l - 1) // 2
print(ans)


### FIXED CODE ###

def main():
	N,P = map(int,input().split())
	S = [int(s) for s in list(input().strip())][::-1]
	num = 0
	ans = 0
	if P == 2 or P == 5:
		for i in range(N):
			if S[i]%P == 0:
				ans += N-i
		print(ans)
		return
	L = [0]*P
	L[0]=1
	t = 0
	s = 1
	for z in S:
		t = (z*s+t)%P	
		L[t]+=1
		s=s*10%P
	for l in L:
		ans += l * (l - 1) // 2
	print(ans)

if __name__ == '__main__':
	main()
### BUGGY CODE ###

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

  for i in range(n):
    print(a.index(i+1)+1,end=" "),

main()

### FIXED CODE ###

n = int(input())
a = list(map(int,input().split()))
ans = [0]*n

for i,name in enumerate(a):
  ans[name-1]=i+1

print(*ans)
### BUGGY CODE ###

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

ans = 0
for i in range(N):
    if i == 0:
        ans += 1
        continue

    if P[i] <= min(P[:i]):
        ans += 1

print(ans)


### FIXED CODE ###

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

ans = 0
n_p = 0
for i in range(N):
    if i == 0:
        ans += 1
        n_p = P[0]
        continue

    if P[i] <= n_p:
        ans += 1

    if n_p > P[i]:
        n_p = P[i]
        

print(ans)
### BUGGY CODE ###

import sys
H, W, M = map(int, input().split())
lis =[]
Hlis = [0]*H
Wlis = [0]*W
for _ in range(M):
    Ch, Cm = map(int, input().split())
    Hlis[Ch-1] += 1
    Wlis[Cm-1] += 1
    lis.append([Ch, Cm])

Hmax = max(Hlis)
Hidx = [i+1 for i, v in enumerate(Hlis) if v == Hmax]
Wmax = max(Wlis)
Widx = [i+1 for i, v in enumerate(Wlis) if v == Wmax]

lis=tuple(lis)

for i in range(len(Hidx)):
    for j in range(len(Widx)):
        if [Hidx[i], Widx[j]] not in lis:
            print(Hmax+Wmax)
            sys.exit()
else:
    print(Hmax + Wmax -1)

### FIXED CODE ###

import sys
H, W, M = map(int, input().split())
lis =set()
Hlis = [0]*H
Wlis = [0]*W
for _ in range(M):
    Ch, Cm = map(int, input().split())
    Hlis[Ch-1] += 1
    Wlis[Cm-1] += 1
    lis.add((Ch, Cm))

Hmax = max(Hlis)
Hidx = [i+1 for i, v in enumerate(Hlis) if v == Hmax]
Wmax = max(Wlis)
Widx = [i+1 for i, v in enumerate(Wlis) if v == Wmax]

for i in range(len(Hidx)):
    for j in range(len(Widx)):
        if (Hidx[i], Widx[j]) not in lis:
            print(Hmax+Wmax)
            sys.exit()
else:
    print(Hmax + Wmax -1)
### BUGGY CODE ###

n = int(input())
s = input()

result = 0

if n <= 2:
    print(0)
    
for i in range(n-2):
    if s[i] == "R":
        for j in range(i+1, n-1):
            if s[j] == "G":
                a = s[j+1:].count("B")
                if 2*j - i <= n-1:
                    if s[2*j-i] == "B":
                        a -= 1
                result += a
            elif s[j] == "B":
                a = s[j+1:].count("G")
                if 2*j - i <= n-1:
                    if s[2*j-i] == "G":
                        a -= 1
                result += a
    if s[i] == "G":
        for j in range(i+1, n-1):
            if s[j] == "R":
                a = s[j+1:].count("B")
                if 2*j - i <= n-1:
                    if s[2*j-i] == "B":
                        a -= 1
                result += a
            elif s[j] == "B":
                a = s[j+1:].count("R")
                if 2*j - i <= n-1:
                    if s[2*j-i] == "R":
                        a -= 1
                result += a
    if s[i] == "B":
        for j in range(i+1, n-1):
            if s[j] == "G":
                a = s[j+1:].count("R")
                if 2*j - i <= n-1:
                    if s[2*j-i] == "R":
                        a -= 1
                result += a
            elif s[j] == "R":
                a = s[j+1:].count("G")
                if 2*j - i <= n-1:
                    if s[2*j-i] == "G":
                        a -= 1
                result += a
print(result)

### FIXED CODE ###

n = int(input())
s = input()
 
result = 0
 
if n <= 2:
    print(0)

for i in range(n-2):
    if s[i] == "R":
        a = s[i+1:].count("G")
        b = s[i+1:].count("B")
        result += a*b
        for j in range(1, (n+1-i)//2):
            if (s[i+j] == "G" and s[i+2*j] == "B") or (s[i+j] == "B" and s[i+2*j] == "G"):
                result -= 1
    elif s[i] == "G":
        a = s[i+1:].count("R")
        b = s[i+1:].count("B")
        result += a*b
        for j in range(1, (n+1-i)//2):
            if (s[i+j] == "R" and s[i+2*j] == "B") or (s[i+j] == "B" and s[i+2*j] == "R"):
                result -= 1
    elif s[i] == "B":
        a = s[i+1:].count("R")
        b = s[i+1:].count("G")
        result += a*b
        for j in range(1, (n+1-i)//2):
            if (s[i+j] == "R" and s[i+2*j] == "G") or (s[i+j] == "G" and s[i+2*j] == "R"):
                result -= 1
print(result)
### BUGGY CODE ###

def lunlun(num):
    output = True
    st_num = str(num)
    for ind in range(len(str(num))-1):
        output = output * (abs(int(st_num[ind])-int(st_num[ind+1])) <= 1)
    return output
        
k = int(input())
num = 0
for ind in range(k):
    num += 1
    while not lunlun(num):
        num += 1
print(num)
    


### FIXED CODE ###

k = int(input())
X = [1,2,3,4,5,6,7,8,9]

start = 0
end = 9
while k > len(X):
    for i in range(end-start):
        n = str(X[start+i])
        # print(n)
        if int(n[-1])-1 >= 0:
            X.append(int(n+str(int(n[-1])-1)))
        X.append(int(n+str(n[-1])))
        if int(n[-1])+1 <= 9:
            X.append(int(n+str(int(n[-1])+1)))
    start = end
    end = len(X)
    # print(X)
print(X[k-1])
### BUGGY CODE ###

import numpy as np
N, K, Q = [int(i) for i in input().split()]
A = []
for i in range(Q):
    A.append(int(input())-1)

score = K * np.ones(N)

point = np.array([A.count(i) for i in range(N)])
minus = Q - point

score = score - minus
result = ['Yes' if score[i] > 0 else 'No' for i in range(len(score))]
for i in range(len(result)):
    print(result[i])

### FIXED CODE ###

N, K, Q = [int(i) for i in input().split()]

score = [K - Q] * N

for i in range(Q):
    score[int(input())-1] += 1

for i in range(N):
    if score[i] > 0:
        print('Yes')
    else:
        print('No')
### BUGGY CODE ###

x = int(input())
vis = [False for _ in range(1001)]
for i in range(1,1001):
  tmp = i
  while (tmp < 1001):
    vis[tmp] = True
    tmp *= i
best = 0
for i in range(x+1):
  if vis[i] and i > best:
    best = i
print(i)

### FIXED CODE ###

x = int(input())
vis = [False for _ in range(x+1)]
vis[1] = True
for i in range(2,x+1):
  tmp = i*i
  while tmp < x+1:
    vis[tmp] = True
    tmp *= i
best = 1
for i in range(1,x+1):
  if vis[i]:
    best = i
print(best)
### BUGGY CODE ###

n = int(input())
arr = input()

ans = 0

while "WR" in arr:
    left = arr.index("W")
    right = len(arr) - arr[::-1].index("R") - 1
    arr = arr[:left] + "R" + arr[left+1:right] + "W" + arr[right+1:]
    ans += 1

print(ans)

### FIXED CODE ###

import numpy as np
n = int(input())
arr = input()

dp = [[0] * (n + 1) for _ in range(2)]
dp[1][0] = arr.count("R")

for i in range(1, n + 1):
    if arr[i - 1] == "W":
        dp[0][i] = dp[0][i - 1] + 1
        dp[1][i] = dp[1][i - 1]
    if arr[i - 1] == "R":
        dp[0][i] = dp[0][i - 1]
        dp[1][i] = dp[1][i - 1] - 1


dp = np.array(dp)

print(dp.min(axis=0).max())
### BUGGY CODE ###

n,l,T = map(int,input().split())
s = [0 for i in range(n)]
for i in range(n):
    s[i] = list(map(int, input().split()))

def f(w):
    if w == 1:
        return 1
    elif w == 2:
        return -1
    
t = 0
d = l
i_d = []

while t < T:
    for i in range(n):
        if i < n-1 :
            if s[i][0] < s[i+1][0] and s[i][1] == 1 and s[i+1][1] == 2:
                if s[i+1][0] - s[i][0] < d:
                    d = s[i+1][0] - s[i][0]
    
            elif s[i][0] > s[i+1][0] and s[i][1] == 1 and s[i+1][1] == 2:
                if s[i+1][0] + l - s[i][0] < d:
                    d = s[i+1][0] + l - s[i][0]
                    
        elif i == n-1:
            if s[i][0] < s[0][0] and s[i][1] == 1 and s[0][1] == 2:
                if s[0][0] - s[i][0] < d:
                    d = s[0][0] - s[i][0]
                    
            elif s[i][0] > s[0][0] and s[i][1] == 1 and s[0][1] == 2:
                if s[0][0] + l - s[i][0] < d:
                    d = s[0][0] + l - s[i][0]
                    
    for i in range(n):
        if i < n-1 :
            if s[i][0] < s[i+1][0] and s[i][1] == 1 and s[i+1][1] == 2:
                if s[i+1][0] - s[i][0] == d:
                    i_d.append(i)
            elif s[i][0] > s[i+1][0] and s[i][1] == 1 and s[i+1][1] == 2:
                if s[i+1][0] + l - s[i][0] == d:
                    i_d.append(i)
                    
        elif i == n-1:
            if s[i][0] < s[0][0] and s[i][1] == 1 and s[0][1] == 2:
                if s[0][0] - s[i][0] == d:
                    i_d.append(i)
                    
            elif s[i][0] > s[0][0] and s[i][1] == 1 and s[0][1] == 2:
                if s[0][0] + l - s[i][0] == d:
                    i_d.append(i)
                    
    for j in range(n):
        if t + d/2 <= T:
            s[j][0] += f(s[j][1]) * (d/2)
            if s[j][0] >= l:
                s[j][0] -= l
            elif s[j][0] < 0:
                s[j][0] += l
            
        else:
            s[j][0] += f(s[j][1]) * (T-t)
            if s[j][0] >= l:
                s[j][0] -= l
            elif s[j][0] < 0:
                s[j][0] += l
    for j in i_d:
        if j < n-1:
            s[j][1], s[j+1][1] = s[j+1][1], s[j][1]
        else:
            s[j][1], s[0][1] = s[0][1], s[j][1]
    t = t + d/2
    i_d.clear()
    d = l
    
import math

for i in range(n):
    print(math.floor(s[i][0]))

### FIXED CODE ###

from math import floor
n,l,t = map(int,input().split())
ants = []
touch = 0

for i in range(n):
    x, w = map(int,input().split())
    if w == 1:
        touch += (x + t) // l
        x1 = (x + t) % l
    else:
        touch += (x - t) // l
        x1 = (x - t) % l
    ants.append(x1)
touch = touch % n
ants.sort()
ants = ants[touch:]+ants[:touch]

for i in range(n):
    print(ants[i])
### BUGGY CODE ###

import sys
from collections import defaultdict
# from collections import Counter
# from queue import PriorityQueue
# sys.setrecursionlimit(2000000)

def distance(X, Y, start, goal):
    ans = float('inf')

    tmp = goal - start
    if tmp < ans:
        ans = tmp

    # start ~ X ~ Y ~ goal,
    tmp = abs(X - start) + 1 + abs(goal - Y)
    if tmp < ans:
        ans = tmp

    # start ~ Y ~ X ~ goal
    tmp = abs(Y - start) + 1 + abs(goal - X)
    if tmp < ans:
        ans = tmp

    return ans

#     # 短絡パスを使える場合
#     if start <= X and Y <= goal

#     # 短絡パスを使えないならば、普通に距離を計算
#     if X < start:
#         return goal - start

#     # 短絡パスを使えても、隣のパスへの距離は1
#     if goal - start == 1:
#         return 1

#     # 短絡パスより手前だと使えない
#     if goal < Y:
#         return goal - start



    # return goal - start - 1

def main():
    # N = int(input())

    N, X, Y = [int(s) for s in input().split()]

    distance_dict = defaultdict(int)
    for i in range(1, N+1):
        for j in range(i + 1, N+1):
            d = distance(X, Y, i, j)
            # sys.stderr.write('{} to {} : d = {}\n'.format(i, j, d))
            # ditance_dict[(i, j)] = d
            distance_dict[d] += 1

    for k in range(1, N):
        # print(str(distance_dict[k]))
        print(distance_dict[k])

    # As = []
    # Bs = []
    # for i in range(N):
    #     A, B = [int(s) for s in input().split()]
    #     As.append(A)
    #     Bs.append(B)

    return 0

if __name__ == '__main__':
    sys.exit(main())


### FIXED CODE ###

import sys
from collections import defaultdict
# from collections import Counter
# from queue import PriorityQueue
# sys.setrecursionlimit(2000000)

def distance(X, Y, start, goal):
    ans = float('inf')

    tmp = goal - start
    if tmp < ans:
        ans = tmp

    # start ~ X ~ Y ~ goal,
    tmp = abs(X - start) + 1 + abs(goal - Y)
    if tmp < ans:
        ans = tmp

    # start ~ Y ~ X ~ goal
    tmp = abs(Y - start) + 1 + abs(goal - X)
    if tmp < ans:
        ans = tmp

    return ans

#     # 短絡パスを使える場合
#     if start <= X and Y <= goal

#     # 短絡パスを使えないならば、普通に距離を計算
#     if X < start:
#         return goal - start

#     # 短絡パスを使えても、隣のパスへの距離は1
#     if goal - start == 1:
#         return 1

#     # 短絡パスより手前だと使えない
#     if goal < Y:
#         return goal - start



    # return goal - start - 1

def main():
    # N = int(input())

    N, X, Y = [int(s) for s in input().split()]

    distance_dict = defaultdict(int)
    for i in range(1, N+1):
        for j in range(i + 1, N+1):
            d = distance(X, Y, i, j)
            # sys.stderr.write('{} to {} : d = {}\n'.format(i, j, d))
            # ditance_dict[(i, j)] = d
            distance_dict[d] += 1

    for k in range(1, N):
        # print(str(distance_dict[k]))
        print(distance_dict[k])

    # As = []
    # Bs = []
    # for i in range(N):
    #     A, B = [int(s) for s in input().split()]
    #     As.append(A)
    #     Bs.append(B)

    return 0

if __name__ == '__main__':
    sys.exit(main())
### BUGGY CODE ###

N = int(input())
L = []
for i in range(N):
  L.append(input())
res = 0
anagrams = []
for i in range(N):
    for j in range(N):
        if i!=j and sorted(L[i]) == sorted(L[j]) and (i,j) not in anagrams:
            res += 1
            anagrams.append((i,j))
            anagrams.append((j,i))
print(res)

### FIXED CODE ###

import sys
N = int(input())
L = dict()
res = 0
for i in range(N):
    a = input()
    A = ''.join(sorted(a))
    if A not in L:
        L[A] = 1
        continue
    res += L[A]
    L[A] += 1
print(res)
### BUGGY CODE ###

from heapq import heapify, heappop, heappush, heappushpop
from collections import deque
import sys
input = sys.stdin.readline

INF = 1e10

# class PriorityQueue:
#     """
#     優先度付きキューの
#     """
#     def __init__(self, heap):
#         self.heap = heap
#         heapify(self.heap)
    
#     def push(self, item):
#         heappush(self.heap, item)
    
#     def pop(self):
#         return heappop(self.heap)
    
#     def pushpop(self, item):
#         return heappushpop(self.heap, item)
    
#     def __call__(self):
#         return self.heap
    
#     def __len__(self):
#         return len(self.heap)
    
    

def main():
    H,W=map(int, input().split())
    ch, cw = map(int, input().split())
    dh, dw = map(int, input().split())

    S = [input() for _ in range(H)]

    def dijkstra(sx, sy):
        # Color = [[0]*(W) for _ in range(H)] # 0: 未訪問 1: Seen 2: Visited
        D = [[INF]*(W) for _ in range(H)] #始点からの距離(重み)
        # P = [None]*N #親

        D[sx][sy] = 0
        # P[s] = None
        # PQ = PriorityQueue([(0, sx, sy)]) #(Cost, Node)を格納し、PQにする。
        PQ = [(0, sx, sy)]
        heapify(PQ)
        while PQ: # PQに候補がある限り

            min_cost, ux, uy = heappop(PQ) # 最小コストなノードu
            for dx in range(-2, 3):
                for dy in range(-2, 3):
                    xx, yy = ux+dx, uy+dy
                    if 0 <= xx < H and 0 <= yy < W and S[xx][yy]==".":
                        is_not_neighbor = int(abs(dx) + abs(dy) != 1)
                        # neighborでなければコストが1増える
                        if D[ux][uy] + is_not_neighbor < D[xx][yy]:
                            D[xx][yy] = D[ux][uy] + is_not_neighbor
                            heappush(PQ, (D[xx][yy], xx, yy))
        return D

    D = dijkstra(ch-1, cw-1)
    if D[dh-1][dw-1] == INF:
        print(-1)
    else:
        print(D[dh-1][dw-1])

main()

### FIXED CODE ###

import heapq
INF = 1e7
H,W=map(int, input().split())
sx, sy = map(int, input().split())
dh, dw = map(int, input().split())
sx -= 1
sy -= 1
S = [input() for _ in range(H)]
D = [[INF]*(W) for _ in range(H)] #始点からの距離(重み)
D[sx][sy] = 0
PQ = [(0, (sx, sy))]
heapq.heapify(PQ)
while PQ: # PQに候補がある限り
    _, (ux, uy) = heapq.heappop(PQ) # 最小コストなノードu
    for dx in range(-2, 3):
        for dy in range(-2, 3):
            xx, yy = ux+dx, uy+dy
            if 0 <= xx < H and 0 <= yy < W and S[xx][yy]==".":
                is_not_neighbor = int(abs(dx) + abs(dy) != 1)
                # neighborでなければコストが1増える
                if D[ux][uy] + is_not_neighbor < D[xx][yy]:
                    D[xx][yy] = D[ux][uy] + is_not_neighbor
                    heapq.heappush(PQ, (D[xx][yy], (xx, yy)))
if D[dh-1][dw-1] >= INF:
    print(-1)
else:
    print(D[dh-1][dw-1])
### BUGGY CODE ###

#!/usr/bin/env python3
def main():
    def expected_val(limit):
        return sum(range(limit + 1)) / limit

    N, K = map(int, input().split())
    P = [int(x) for x in input().split()]

    ans = 0
    for i in range(N - K + 1):
        res = 0
        for k in range(K):
            res += expected_val(P[i + k])
        ans = max(ans, res)
    print(ans)


if __name__ == '__main__':
    main()


### FIXED CODE ###

#!/usr/bin/env python3
def main():
    def expected_val(limit):
        return (1 + limit) / 2

    N, K = map(int, input().split())
    P = [int(x) for x in input().split()]

    lst = [0]
    res = 0
    for p in P:
        res += p + 1
        lst.append(res)
    ans = 0
    for i in range(N - K + 1):
        res = lst[i + K] - lst[i]
        ans = res if res > ans else ans
    print(ans / 2)


if __name__ == '__main__':
    main()
### BUGGY CODE ###

def knapsack(n,w):
    global weight,value,bag
    if(n==0 or w==0):
        return 0
    temp=str(n)+' '+str(w)
    if(temp in bag):
        return bag[temp]
    if(weight[n-1]<=w):
        bag[temp]=max(value[n-1] + knapsack(n-1,w-weight[n-1]),knapsack(n-1,w))
        return bag[temp]
    else:
        bag[temp]=knapsack(n-1,w)
        return bag[temp]
n,w=map(int,input().split())
weight=[]
value=[]
bag=dict()
for _ in range(n):
    tempw,tempv=map(int,input().split())
    weight.append(tempw)
    value.append(tempv)
temp=knapsack(n,w)
print(temp)


### FIXED CODE ###

import array
n,w=map(int,input().split())
weight=[]
value=[]
for _ in range(n):
    tempw,tempv=map(int,input().split())
    weight.append(tempw)
    value.append(tempv)
t=[[0 for i in range(n+1)] for j in range(w+1)]
for i in range(1,w+1):
    for j in range(1,n+1):
        if(weight[j-1]<=i):
            t[i][j]=max(value[j-1]+t[i-weight[j-1]][j-1],t[i][j-1])
        else:
            t[i][j]=t[i][j-1]
print(t[-1][-1])
### BUGGY CODE ###

N=int(input())
A = [int(input()) for _ in[0]*5]
A.reverse()
d=[0]*6
d[5]=N
i=0
while d[0] < N:
  i+=1
  for j in range(5):
    v=min(d[j+1],A[j])
    d[j] += v
    d[j+1] -= v
print(i)

### FIXED CODE ###

N=int(input())
A = [int(input()) for _ in[0]*5]
#ボトルネック通過時間
bn=-(-N//min(A))
#START to BN + BN to GOAL = 4
print(bn+4)
### BUGGY CODE ###

N,M = map(int,input().split())
A = list(map(int,[input() for i in range(M)]))

dp = {i:0 for i in A}

dp[0]=1 # 0段目
if 1 in A: # 1段目
  dp[1]=0
else :
  dp[1]=1

for i in range(2,N+1):  
  if i in A:
    continue
  else :
    dp[i]=dp[i-1]+dp[i-2]
print(dp[N]%1000000007)  

### FIXED CODE ###

n,m = map(int,input().split())
a = [int(input()) for _ in range(m)]
dp=[0]*(n+1)
dp[0]=1

af = [0]*(n+1)
for ai in a:
  af[ai]+=1

if 1 in a:
  dp[1]=0
else:
  dp[1]=1

  
for i in range(2,n+1):
  dp[i]=dp[i-2]+dp[i-1]
  if af[i]==1:    
    dp[i]=0

print(dp[-1]%1000000007)
### BUGGY CODE ###

N = int(input())
A = [int(a) for a in input().split()]
B = []
for n in range(N):
    if n % 2 == 0:
        B.append(A[n])
    else:
        B.insert(0, A[n])
if N % 2 == 0:
    print(*B)
else:
    print(*B[::-1])

### FIXED CODE ###

from collections import deque

N = int(input())
A = [int(a) for a in input().split()]
B = deque([])
for n in range(N):
    if n % 2 == 0:
        B.append(A[n])
    else:
        B.appendleft(A[n])
if N % 2 == 0:
    print(*B)
else:
    print(*list(B)[::-1])