What's wrong?


import math
n=int(input())
allk=[int(i) for i in input().split()]
ans=s1=s2=0
for i in range(n):
    ans +=allk[i]

for i in range(n**2):
    s1=s2=0
    for k in range(n):
        if(i%2==0): s1 +=allk[k]
        else: s2 +=allk[k]
        i //=2
    k=math.fabs(s1-s2)
    ans=min(k,ans)
print(int(ans))

Why you used range(n**2)? Maybe range(2**n)?