def make_divisors(n):
    divisors = []  #必要に応じてsetにしても良いかも
    i = 1
    while i ** 2 <= n:
        if n % i == 0:
            divisors.append(i)
            if i ** 2 != n:
                divisors.append(n//i)
        i += 1
    divisors.sort()
    return divisors

from itertools import accumulate
N = int(input())
A = [0] + list(map(int,input().split()))
A = list(accumulate(A))
SA = set(A)
suma = A[-1]
PL = make_divisors(suma)
for p in PL:
    for i in range(1,suma//p):
        if i * p not in SA:
            break
    else:
        print(suma//p)
        exit()