n = int(input())

if n == 1:
    print(101)
    exit()

a = list(map(int, input().split()))

sm = 0

for i in range(n - 1):
    sm += a[i]

count = 0

for i in range(101):
    added = sm + i
    if added // n * n == added:
        count += 1

print(count)