N = int(input())
if N == 1:
    print(101)
    exit()
A = list(map(int, input().split()))
S = sum(A)

ans = 0
for i in range(1000):
    if i % N:
        continue

    x = i - S
    if x < 0 or x > 100:
        continue
    ans += 1

print(ans)