from operator import add
def main():
    N = int(input())
    A = list(map(int, input().split(" ")))

    z = 0
    for x in range(0, 101):
        s = sum([*A, x])
        if (s // N) == (s / N):
            z += 1
    print(z)

if __name__ == '__main__':
    main()