#N = input()
N = int(input())
#s = input().split()
#hw = [[int(i) for i in input().split()] for _ in range(N)]
#N, M = map(int, input().split())
A = list(map(int, input().split()))

if (N == 1):
    print(101)
    exit()
else:
    sum = 0
    for i in range(1, N):
        sum += A[i - 1]

    k = 0
    for i in range(101):
        if (((sum + i) % N) == 0):
            k += 1

    print(k)