Harryxun/stf_run huggingface dataset:
X, Y, Z, K = map(int, input().split())
A = list(map(int, input().split()))
B = list(map(int, input().split()))
C = list(map(int, input().split()))

ab_total_list = []
total_list = []

A.sort()
A.reverse()
if len(A) > K:
    A = A[0:K+1]

B.sort()
B.reverse()
if len(B) > K:
    B = B[0:K+1]

C.sort()
C.reverse()
if len(C) > K:
    C = C[0:K+1]

ab_total_list = []
for i in A:
    for j in B:
        ab_total_list.append(i+j)

ab_total_list.sort()
ab_total_list.reverse()
if len(ab_total_list) > K:
    ab_total_list = ab_total_list[0:K+1]

z = 0
min_total = 0
if K > len(ab_total_list):
    min_total = ab_total_list[-1]
else:
    min_total = ab_total_list[K]

for i in range(0, K):
    for j in range(0, int(K/(i+1))):
        if j >= len(C):
            break
        total = ab_total_list[i] + C[j]
        total_list.append(total)
        if (i*j) > K:
            break

total_list.sort()
total_list.reverse()
for i in range(0, K):
    print(total_list[i])

### FIXED CODE ###

X, Y, Z, K = map(int, input().split())
A = list(map(int, input().split()))
B = list(map(int, input().split()))
C = list(map(int, input().split()))

ab_total_list = []
total_list = []

A.sort()
A.reverse()
if len(A) > K:
    A = A[0:K+1]

B.sort()
B.reverse()
if len(B) > K:
    B = B[0:K+1]

C.sort()
C.reverse()
if len(C) > K:
    C = C[0:K+1]

ab_total_list = []
for i in A:
    for j in B:
        ab_total_list.append(i+j)

ab_total_list.sort()
ab_total_list.reverse()
if len(ab_total_list) > K:
    ab_total_list = ab_total_list[0:K+1]

for i in range(0, K):
    for j in range(0, int(K/(i+1))):
        if j >= len(C) or i >= len(ab_total_list):
            break
        total = ab_total_list[i] + C[j]
        total_list.append(total)
        if (i*j) > K:
            break

total_list.sort()
total_list.reverse()
for i in range(0, K):
    print(total_list[i])
N = int(input())
A = [int(_) for _ in input().split()]
mod = 10**9 + 7

f = [1] * (N + 2)
fi = [1] * (N + 2)
for i in range(2, N + 2):
    f[i] = i * f[i - 1]
    f[i] %= mod
for i in range(2, N + 2):
    fi[i] = fi[i - 1] * pow(i, mod - 2, mod)
    fi[i] %= mod


def comb(n, r):
    if 0 <= n and 0 <= r and 0 <= n - r:
        return (f[n] * fi[r] * fi[n - r]) % mod
    else:
        return 0


b = set()
for a in A:
    if a in b:
        break
    b.add(a)
c = []
for i in range(N):
    if A[i] == a:
        c += [i]
i, j = c
for x in range(1, N + 2):
    print((comb(N + 1, x) - (comb(N - j + i, x - 1))) % mod)


### FIXED CODE ###

N = int(input())
A = [int(_) for _ in input().split()]
mod = 10**9 + 7

f = [1] * (N + 2)
fi = [1] * (N + 2)
for i in range(2, N + 2):
    f[i] = i * f[i - 1]
    f[i] %= mod
for i in range(2, N + 2):
    fi[i] = fi[i - 1] * pow(i, mod - 2, mod)
    fi[i] %= mod


def comb(n, r):
    if 0 <= n and 0 <= r and 0 <= n - r:
        return (f[n] * fi[r] * fi[n - r]) % mod
    else:
        return 0


b = set()
for a in A:
    if a in b:
        break
    b.add(a)
c = []
for i in range(N + 1):
    if A[i] == a:
        c += [i]
i, j = c
for x in range(1, N + 2):
    print((comb(N + 1, x) - (comb(N - j + i, x - 1))) % mod)
N = list(map(int,input()))
for i in len(N - 1):
    if N[i] == N[i+1]:
        print("Good")
    else :
        print("Bad")


### FIXED CODE ###

N = list(map(int,input()))
bool = 0
for i in range(len(N) - 1):
    if N[i] != N[i+1]:
        bool = 1
    else:
        print("Bad")
        exit()
if bool == 1:
    print("Good")
N = int(input())
numbers = map(int, input().split())
min_num = min(numbers)
max_num = max(numbers)
abs_= float('inf')
for b in range(min_num, max_num):
    abs_pre = sum([abs(a-b-i) for i, a in enumerate(numbers)])
    if abs_pre < abs_:
        abs_ = abs_pre
print(abs_)

### FIXED CODE ###

from statistics import median

N = int(input())
numbers = [int(a)-i for i, a in enumerate(input().split())]
b = median(numbers)
abs_1 = sum([abs(c-int(b)) for c in numbers])
abs_2 = sum([abs(c-int(b)-1) for c in numbers])
print(min(abs_1, abs_2))
a,b,c,d = map(int, input().split())
 
if abs(b-a) < d and abs(c-b) < d :
  print('Yes')
elif: abs(a-c) < d :
  print('Yes')
else:
  print('No')

### FIXED CODE ###

a,b,c,d = map(int, input().split())
 
if abs(b-a) <= d and abs(c-b) <= d :
  print('Yes')
elif abs(a-c) <= d :
  print('Yes')
else:
  print('No')
a,b = map(int,input().split())
#最大公約数
def gcd(a,b):#a<=b
    while b != 0:
        a = b
        b = b % a
    return a
#最小公約数
def lcm(a,b):
    return a*b / gcd(a,b)

print(lem(a,b))



### FIXED CODE ###

a,b = map(int,input().split())
#最大公約数
def gcd(a,b):#a<=b
    while a != 0:
        a,b = b%a,a
    return b
#最小公約数
def lcm(a,b):
    return a*b // gcd(a,b)
print(lcm(a,b))
import numpy as np

N,M = map(int,input().split())
Xlist = [int(_) for _ in input().split()]
Xlist.sort()
answer = 0
max_difflist = np.array([])
salist = np.array([])
ilist = np.array([])
min_n = -1

for i in range(M-1):
    sa = abs(Xlist[i]-Xlist[i+1])
    salist = np.append(salist,sa)

    if len(max_difflist)+1 < N:
        ilist = np.append(ilist,i)
        max_difflist = np.append(max_difflist,sa)

    elif sa > min_n:
        max_difflist = np.sort(max_difflist)[::-1]
        index = np.where(max_difflist == min_n)[0]
        max_difflist[index] = sa
        ilist[index] = i
    min_n = np.min(max_difflist)

for i_ in ilist:
    salist[int(i_)] = 0
print(int(sum(salist)))


### FIXED CODE ###

N, M = map(int, input().split())
Xlist = sorted(list(map(int, input().split())))
Llist = []
for i in range(M - 1):
    Llist.append(Xlist[i + 1] - Xlist[i])
Llist.sort()
print(sum(Llist[:M - N]) if N < M else 0)
a = int(input())
b = int(input())

c = a * b

if c % 2 == 0:
    print("Even")
else:
    print("Odd")


### FIXED CODE ###

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

a = t[0]
b = t[1]

if (a * b) % 2 == 0:
    print("Even")
else :
    print("Odd")
N = int(input())
for i in range(N):
    A[i] = list(map(str,input().split()))
for i in range(N):
    A[i].append(str(i))

B = sorted(A, key=lambda x: x[1], reverse=True)

C = sorted(B, key=lambda x: x[0])

for i in range(N):
    print(int(C[i][2])+1)

### FIXED CODE ###

input_AP = list(map(int, input().split()))
A = input_AP[0]
P = input_AP[1]

result = (A*3 + P)//2
print(result)
N, M = map(int, input().split())
if M == 0:
    print(10**(N-1))
    exit(0)
A = [[] for i in range(0, N)]
for i in range(0, M):
    x, y = map(int, input().split())
    if y in A[x-1]:
        continue
    A[x-1].append(y)
for a in A:
    if len(a) > 1:
        print(-1)
        exit(0)
ans = ''
if A[0][0] == 0:
    print(-1)
    exit(0)
for i in range(0, N):
    if len(A[i]) == 1:
        ans += str(A[i][0])
    else:
        ans += '0'
print(ans)


### FIXED CODE ###

N, M = map(int, input().split())
A = []
for i in range(0, M):
    a = tuple(map(int, input().split()))
    A.append(a)
start = 10**(N-1)
if N == 1:
    start = 0
for x in range(start, 10**N):
    ans = str(x)
    flag = True
    for a in A:
        if ans[a[0]-1] != str(a[1]):
            flag = False
    if flag:
        print(x)
        exit(0)
print(-1)
X = int(input())
y = 100
ans = 0
while(True):
  ans++
  y += y//100
  if(X<=y):
    break
print(ans)

### FIXED CODE ###

X = int(input())
y = 100
ans = 0
while(True):
  ans+=1
  y += y//100
  if(X<=y):
    break
print(ans)
h,w = map(int,raw_input().split())
d = [map(int,raw_input().split()) for i in range(10)]

	for k in range(10):
		for i in range(10):
			for j in range(10):
				d[i][j] = min(d[i][j], d[i][k] + d[k][j])
arr = [map(int,raw_input().split()) for i in range(h)]

print sum(sum(d[a][1] if a>=0 else 0 for a in aa) for aa in arr)

### FIXED CODE ###

h,w = map(int,raw_input().split())
d = [map(int,raw_input().split()) for i in range(10)]
for t in xrange(10):
	for i in range(10):
		for j in range(10):
			for k in range(10):
				d[i][j] = min(d[i][j], d[i][k] + d[k][j])
arr = [map(int,raw_input().split()) for i in range(h)]

print sum(sum(d[a][1] if a>=0 else 0 for a in aa) for aa in arr)
data = [
    "{0} {1}".format(s,r)
    for s in ('S', 'H', 'C', 'D')
    for r in range(1, 13, + 1)
    ]

count = int(input())
for c in range(count):
    card = input()
    data.remove(card)

for c in data:
    print(c)

### FIXED CODE ###

cards = {
        'S': [0 for _ in range(13)],
        'H': [0 for _ in range(13)],
        'C': [0 for _ in range(13)],
        'D': [0 for _ in range(13)],
}
n = int(input())
for _ in range(n):
    (s, r) = input().split()
    cards[s][int(r) - 1] = 1
 
for s in ('S', 'H', 'C', 'D'):
    for r in range(13):
        if cards[s][r] == 0:
            print(s, r + 1)
def f(A, i, j, k, next,res):
    if A[i] == A[j] == 0:
        print("No")
        exit()
    elif A[i] == A[j] == 1 and A[k] == 0:
        if i in next:
            A[i] += 1
            A[j] -= 1
            return "ABC"[i]
        else:
            A[i] -= 1
            A[j] += 1
            return "ABC"[j]
    else:
        A[i] += 1
        A[j] -= 1
        return "ABC"[i]
    

def main():
    N, A, B, C = [int(_n) for _n in input().split()]
    S = []
    for i in range(N):
        s = input()
        S.append(s)
    if [A,B,C].count(0) == 3:
        print("No")
        return
    res = ""
    arr = [A,B,C]
    S.append("")
    for i,s in enumerate(S[:-1]):
        if S[i+1] == "AB":
            n = [0,1]
        if S[i+1] == "BC":
            n = [2,1]
        if S[i+1] == "AC":
            n = [0,2]
        if s == "AB":
            if arr[0] > arr[1]:
                res += f(arr, 1, 0, 2, n,res)
            else:
                res += f(arr,0,1,2,n,res)
        elif s == "BC":
            if arr[1] > arr[2]:
                res += f(arr, 2, 1, 0, n,res)
            else:
                res += f(arr,1,2,0,n,res)
        elif s == "AC":
            if arr[0] > arr[2]:
                res += f(arr, 0, 2, 1, n,res)
            else:
                res += f(arr,2,0,1,n,res)
    for s in res:
        print(s)
main()

### FIXED CODE ###

def f(A, i, j, k, nex,res):
    if A[i] == A[j] == 0:
        print("No")
        exit()
    elif A[i] == A[j] == 1 and A[k] == 0:
        if i in nex:
            A[i] += 1
            A[j] -= 1
            return "ABC"[i]
        else:
            A[i] -= 1
            A[j] += 1
            return "ABC"[j]
    else:
        A[i] += 1
        A[j] -= 1
        return "ABC"[i]
    

def main():
    N, A, B, C = [int(_n) for _n in input().split()]
    S = []
    for i in range(N):
        s = input()
        S.append(s)
    if [A,B,C].count(0) == 3:
        print("No")
        return
    res = ""
    arr = [A,B,C]
    S.append("")
    for i,s in enumerate(S[:-1]):
        n = []
        if S[i+1] == "AB":
            n = [0,1]
        if S[i+1] == "BC":
            n = [2,1]
        if S[i+1] == "AC":
            n = [0,2]
        if s == "AB":
            if arr[0] > arr[1]:
                res += f(arr, 1, 0, 2, n,res)
            else:
                res += f(arr,0,1,2,n,res)
        elif s == "BC":
            if arr[1] > arr[2]:
                res += f(arr, 2, 1, 0, n,res)
            else:
                res += f(arr,1,2,0,n,res)
        elif s == "AC":
            if arr[0] > arr[2]:
                res += f(arr, 2,0, 1, n,res)
            else:
                res += f(arr,0,2,1,n,res)
    print("Yes")
    for s in res:
        print(s)
main()
n = int(input())
list_shop = []
 
for i in range(n):
  t = []
  a, b = input().split()
  t.append(a)
  t.append(b)
  t.append(str(i + 1))
  list_shop.append(t)
 
check = 0
c = []
 
list_shop = sorted(list_shop, key=lambda x: x[0])
 
for i in range(len(list_shop) - 1):
  if(list_shop[i][0] == list_shop[i + 1][0]):
    check = 1
  else:
    check = 0
 
  c.append(list(map(int, list_shop[i][1:3])))
  if(check == 1):
    continue
  else:
    c.sort(key=lambda x:x[0], reverse=True)
    for j in c:
      print(int(j[1]))
    c = []
 
if(check == 1):
  c.append(list(map(int, list_shop[n - 1][1:3])))
  c.sort(key=lambda x:x[0], reverse=True)
  for i in c:
    print(i[1])
else:
  print(int(list_shop[n - 1][2]))

### FIXED CODE ###

l = [int(i) for i in input().split() if i.isdigit()]
print(int((3 * l[0] + l[1]) / 2))
data = [
    [[0 for r in range(10)] for f in range(3)] for b in range(4)
]

# ??\?????????????????????????????§????????????????????????????????????
count = int(input(1))
for c in range(count):
    c, f, r, v = [int(1) for i in input().split]
    data[b - 1][f - 1][r - 1] += v
    

for bi, b in enumerate(data):
    for f in b:
        for r in f:
            print(' {0}'.format(r), end='')
    
        print()

    if bi < 3:
        print('#' * 20)

### FIXED CODE ###

data = [
    [[0 for r in range(10)] for f in range(3)] for b in range(4)
]
    
count = int(input())
for c in range(count):
    b,f,r,v = [int(i) for i in input().split()]
    data[b-1] [f-1] [r-1] += v
    
for bi, b in enumerate(data):
    for f in b:
        for r in f:
            print(' {0}'.format(r), end='')
        print()
    if bi < 3:
        print('#' * 20)
a,b=input()
LIST=[a,b]
if "9" in LIST:
  print("Yes")
else:
  print("No)


### FIXED CODE ###

a=input()

if "9" in a:
  print("Yes")
else:
  print("No")
N = int(input())
height = list(map(int, input().split()))

minimum_jump = [-1]*N
minimum_jump[0] = 0
minimum_jump[1] = abs(height[0] - height[1])

def frog_jump(n): #n is index of stone
  if minimum_jump[n] != -1:
    return minimum_jump[n]
  else:
    if minimum_jump[n-1] != -1:
      temp1 = minimum_jump[n-1]
    else:
      temp1 = frog_jump(n-1)
    if minimum_jump[n-2] != -1:
      temp2 = minimum_jump[n-2]
    else:
      temp2 = frog_jump(n-2)
    minimum_jump[n] = min(temp1+abs(height[n] - height[n-1]), temp2+abs(height[n] - height[n-2]))
    return minimum_jump[n]
  
print(frog_jump(N-1))

### FIXED CODE ###

import sys
sys.setrecursionlimit(1001000)

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

minimum_jump = [-1]*N
minimum_jump[0] = 0
minimum_jump[1] = abs(height[0] - height[1])

def frog_jump(n): #n is index of stone
  if minimum_jump[n] != -1:
    return minimum_jump[n]
  else:
    if minimum_jump[n-1] != -1:
      temp1 = minimum_jump[n-1]
    else:
      temp1 = frog_jump(n-1)
    if minimum_jump[n-2] != -1:
      temp2 = minimum_jump[n-2]
    else:
      temp2 = frog_jump(n-2)
    minimum_jump[n] = min(temp1+abs(height[n] - height[n-1]), temp2+abs(height[n] - height[n-2]))
    return minimum_jump[n]
  
print(frog_jump(N-1))
N, W = map(int, input().split())
w = [0] * N
v = [0] * N
for i in range(N):
    x, y = map(int, input().split())
    w[i] = x
    v[i] = y

dp = [[0] * 1010 for _ in range(N+1)]
minw = min(w)
for i in range(N):
    w[i] -= minw
    w[i] += 1
for i in range(N):
    for j in range(1000):
        dp[i+1][j] = dp[i][j]
        if j-w[i] >= 0:
            dp[i+1][j] = max(dp[i+1][j], dp[i][j-w[i]]+v[i])
    
print(dp[N][W-minw])


### FIXED CODE ###

N, W = map(int, input().split())
w = [0] * N
v = [0] * N
for i in range(N):
    w[i], v[i] = map(int, input().split())

minw = min(w)
for i in range(N):
    w[i] -= minw

ww = [[] for _ in range(4)]
for i, o in enumerate(w):
    ww[o].append(v[i])
for i in range(4):
    ww[i].sort(reverse=True)

ans = 0
for i in range(len(ww[0])+1):
    isum = sum(ww[0][:i])
    for j in range(len(ww[1])+1):
        jsum = sum(ww[1][:j])
        for k in range(len(ww[2])+1):
            ksum = sum(ww[2][:k])
            for t in range(len(ww[3])+1):
                tsum = sum(ww[3][:t])
                weight = minw * i + (minw+1) * j + (minw+2) * k + (minw+3) * t
                if weight <= W:
                    ans = max(ans, isum+jsum+ksum+tsum)
print(ans)
N,Q = map(int,input().split())
K = [[] for _ in range(N)]
ans = [0] * N
def dfs(p,x):
    ans[p] += x
    for v in K[p]:
        dfs(v,x)

for _ in range(N-1):
    a,b = map(int,input().split())
    K[a-1].append(b-1)

for _ in range(Q):
    p,x = map(int,input().split())
    p -= 1
    dfs(p,x)
print(' '.join(str(i) for i in ans))

### FIXED CODE ###

import sys
 
sys.setrecursionlimit(10 ** 6)

def input():
    return sys.stdin.readline().strip()
def main():
    N,Q = map(int,input().split())
    K = [[] for _ in range(N+1)]
    nums = [0 for _ in range(N+1)]

    for _ in range(N-1):
        a,b = map(int,input().split())
        K[a].append(b)
        K[b].append(a)

    for _ in range(Q):
        p, x = map(int, input().split())
        nums[p] += x

    def dfs(now,parent):
        for i in K[now]:
            if i != parent:
                nums[i] += nums[now]
                dfs(i,now)

    dfs(1,0)
    print(*nums[1:])

if __name__ == '__main__':
    main()
n,m=map(int,input().split())
mod=10**9+7
from operator import mul
from functools import reduce

def cmb(n,r):
    r = min(n-r,r)
    if r == 0: return 1
    over = reduce(mul, range(n, n - r, -1))
    under = reduce(mul, range(1,r + 1))
    return over // under

def prime_factorize(n):
    a = []
    while n % 2 == 0:
        a.append(2)
        n //= 2
    f = 3
    while f * f <= n:
        if n % f == 0:
            a.append(f)
            n //= f
        else:
            f += 2
    if n != 1:
        a.append(n)
    return a
lst=prime_factorize(m)
if m!=1:
    li=[1]
for i in range(1,len(lst)):
    if lst[i]==lst[i-1]:
        li[-1]+=1
    else:
        li.append(1)
ans=1
for u in li:
    a=n-1+u
    x=cmb(a,u)%mod
    ans=(ans*x)%mod
print(ans)

### FIXED CODE ###

n,m=map(int,input().split())
mod=10**9+7
from operator import mul
from functools import reduce

def cmb(n,r):
    r = min(n-r,r)
    if r == 0: return 1
    over = reduce(mul, range(n, n - r, -1))
    under = reduce(mul, range(1,r + 1))
    return over // under

def prime_factorize(n):
    a = []
    while n % 2 == 0:
        a.append(2)
        n //= 2
    f = 3
    while f * f <= n:
        if n % f == 0:
            a.append(f)
            n //= f
        else:
            f += 2
    if n != 1:
        a.append(n)
    return a
lst=prime_factorize(m)
if m!=1:
    li=[1]
else:
    li=[0]
for i in range(1,len(lst)):
    if lst[i]==lst[i-1]:
        li[-1]+=1
    else:
        li.append(1)
ans=1
for u in li:
    a=n-1+u
    x=cmb(a,u)%mod
    ans=(ans*x)%mod
print(ans)
s = input()
 
print(2018 + s[5:])

### FIXED CODE ###

s = input()
 
print('2018' + s[4:])
import sys
from math import factorial
from collections import Counter
from fractions import Fraction
import heapq, bisect, fractions
import math
import itertools
import numpy as np
sys.setrecursionlimit(10 ** 5 + 10)
INF = 10**15 +5
def input(): return sys.stdin.readline().strip()
def INT(): return int(input())
def MAP(): return map(int, input().split())
def LIST(): return list(map(int, input().split()))
MOD = 10**9 + 7

n, k = MAP()
a = LIST()
a = np.array(a, dtype= np.int64)
def update(a):
    b = np.zeros((n, n), dtype = np.int64)
    for i in range(n):
        b[i, max(0, i-a[i]):min(n, i+a[i]+1)] = 1
    return np.sum(b, axis=0)
end = np.full(n, n, dtype = np.int64)


for i in range(k):
    if np.all(a == end):
        break
    a = update(a)
for i in range(n):
    print(str(int(a[i]))+" ",end = "" )

### FIXED CODE ###

import sys
from math import factorial
from collections import Counter
from fractions import Fraction
import heapq, bisect, fractions
import math
import itertools
sys.setrecursionlimit(10 ** 5 + 10)
INF = 10**15 +5
def input(): return sys.stdin.readline().strip()
def INT(): return int(input())
def MAP(): return map(int, input().split())
def LIST(): return list(map(int, input().split()))
MOD = 10**9 + 7

n, k = MAP()
a = LIST()


end = [n]*n

for i in range(min(k, 41)):
    b = [0]*(n+1)
    for j in range(n):
        b[max(j-a[j], 0)] +=1
        if j+a[j] <n:
            b[j+a[j]+1] -=1
    for j in range(1,n):
        b[j] += b[j-1]
    a = b[:n]

for i in range(n):
    print(str(int(a[i]))+" ",end = "" )
import numpy as np
A = int(input())
a = [100,101,102,103,104,105]

N = A//100
dp = np.array([np.array([0 for i in range(A+1)]) for j in range(N+1)])
dp[0][0] = 1

for i in range(N):
    for j in range(A+1):
        if dp[i][j] == 1:
            dp[i+1][j+100:j+106] = 1

print(dp[N][A])

### FIXED CODE ###

import numpy as np
A = int(input())

if A >= 3000:
    print(1)
else:
    a = [100,101,102,103,104,105]
    N = A//100
    dp = np.array([np.array([0 for i in range(A+1)]) for j in range(N+1)])
    dp[0][0] = 1

    for i in range(N):
        for j in np.where(dp[i] == 1)[0]:
        #for j in range(A+1):
           # if dp[i][j] == 1:
            dp[i+1][j+100:j+106] = 1
    print(dp[N][A])
N=int(input())
A=[int(i) for i in input().split()]
A.sort()
miss=0
if N%2==0:
    for i in range(int(N/2)):        
        for j in range(2):
            if A[0]==2*i+1:
                A.pop(0)
            else:
                miss=1
                
    if miss==1:
        print(0)
    else:
        print(int((2**int(N/2))%(10e9+7)))

if N%2==1:
    if A[0]!=0:
        miss=1
        A.pop(0)
    else:
        A.pop(0)
    for i in range(int((N-1)/2)):
        for j in range(2):
            if A[0]==2*i+2:
                A.pop(0)
            else:
                miss=1
                
    if miss==1:
        print(0)
    else:
        print(int((2**int((N-1)/2))%(10e9+7)))



### FIXED CODE ###

N=int(input())
A=[int(i) for i in input().split()]
A.sort()
miss=0

if N%2==0:
    for i in range(int(N/2)):    
        if miss==1:
            break
        for j in range(2):
            if A[0]==2*i+1:
                A.pop(0)
            else:
                miss=1
                break
                
    if miss==1:
        print(0)
    else:
        print(int((2**int(N/2))%(10**9+7)))

else:
    if A[0]!=0:
        miss=1
        A.pop(0)
    else:
        A.pop(0)
    for i in range(int((N-1)/2)):
        if miss==1:
            break
        for j in range(2):
            if A[0]==2*i+2:
                A.pop(0)
            else:
                miss=1
                break
                
    if miss==1:
        print(0)
    else:
        print(int((2**int((N-1)/2))%(10**9+7)))
cout =0
S= map(str, input().split())
T= map(str, input().split())

count=0
for i in range(3):
    if S[i] == T[i]:
       count += 1
print(count)

### FIXED CODE ###

S = input()
T = input()

n = len(S)
cont = 0
for i in range(n):
    if S[i] == T[i]:
        cont += 1
print(cont)
N = int(input())
words = [input() for _ in range(N)]

for i, w in enumerate(words):
    if words.count(w) > 1:
        print('No')
        break
    if w[0] != words[i - 1][-1]:
        print('No')
        break
else:
    print('Yes')

### FIXED CODE ###

N, M, X, Y = map(int, input().split())
x = list(map(int, input().split()))
y = list(map(int, input().split()))
for i in range(X+1, Y+1):
    if i > max(x) and i <= min(y):
        print('No War')
        break
else:
    print('War')
n,a,b,c=map(int,input().split())
l=[int(input())for i in range(n)]
def dfs(i,x,y,z):
 if i==n:return abs(a-x)+abs(b-y)+abs(c-z)-30if a+b+c>=3else 10**9+7
 A,B,C,D=dfs(i+1,x,y,z),dfs(i+1,x+l[i],y,z)+10,dfs(i+1,x,y+l[i],z)+10,dfs(i+1,x,y,z+l[i])+10
 return min(A,B,C,D)
print(dfs(0,0,0,0)

### FIXED CODE ###

n,a,b,c=map(int,input().split())
l=[int(input())for _ in range(n)]
def dfs(i,x,y,z):
 if i==n:return abs(a-x)+abs(b-y)+abs(c-z)-30if min(x,y,z)>0else 10**9
 return min(dfs(i+1,x,y,z),dfs(i+1,x+l[i],y,z)+10,dfs(i+1,x,y+l[i],z)+10,dfs(i+1,x,y,z+l[i])+10)
print(dfs(0,0,0,0))
if (A - 2 * B) >= 0:
  print (A - 2 * B)
else:
  print('0')

### FIXED CODE ###

a, b=map(int, input().split())
if a-2*b>=0:
  print(a-2*b)
else:
  print(0)
s=input().split()
if s=='Sunny':
  print('Cloudy')
ifelse s=='Cloudy':
  print('Rainy')
else:
  print('Sunny')

### FIXED CODE ###

s=input()
if s=='Sunny':
  print('Cloudy')
elif s=='Cloudy':
  print('Rainy')
else:
  print('Sunny')
A,B = map(int,input().split()) 
if (A % 2) == (B % 2):
  print(abs((A+B)/2))
else:
  print(IMPOSSIBLE)

### FIXED CODE ###

A,B = map(int,input().split()) 
if (A+B) % 2 == 0:
  print(int((A+B)/2))
else:
  print('IMPOSSIBLE')