#include <bits/stdc++.h>
using namespace std;
#define rep(i,a,b) for(LL i = a;i<b; i++)
#define rrep(i,a,b) for(LL i = a;i>=b; i--)
#define INF ((1LL<<62)-(1LL<<31))
#define ooki 9,223,372,036,854,775,807
#define tii -9,223,372,036,854,775,808
typedef long long LL;
int main(){
int n,count=0,sum=0;
  cin>>n;
  rep(i,0,n-1){int a;cin>>a;sum+=a;}
  rep(i,0,101){
    if((sum+i)%n==0){count++;}
  }
  cout<<count<<endl;
}