mod = 1000000007
eps = 10**-9


def main():
    import sys
    input = sys.stdin.readline

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

    S = sum(A)
    ans = 0
    for i in range(101):
        if (S + i) % N == 0:
            ans += 1
    print(ans)


if __name__ == '__main__':
    main()