import sys

sys.setrecursionlimit(10 ** 7)
input = sys.stdin.readline
f_inf = float('inf')
mod = 10 ** 9 + 7


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

    tot = sum(A)
    res = 0
    for i in range(101):
        if (tot + i) % n == 0:
            res += 1
    print(res)


if __name__ == '__main__':
    resolve()