# import sys
# input = sys.stdin.readline
def mp():return map(int,input().split())
def lmp():return list(map(int,input().split()))
import math
import bisect
from copy import deepcopy as dc
from itertools import accumulate
from collections import Counter, defaultdict, deque
def ceil(U,V):return (U+V-1)//V
def modf1(N,MOD):return (N-1)%MOD+1

n = int(input())
a = lmp()
aa = sum(a)
ans = 0
for i in range(101):
    if (aa + i) % n == 0:
        ans += 1
print(ans)