def main():
    N = int(input())
    if N == 1:
        print(101)
        return

    A = 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()