272A - Dima and Friends.cpp

#include<bits/stdc++.h>
using namespace std;
int main()
{
    int n,m,i,sum;
    while(cin>>n)
    {
        sum=0;
        for(i=0;i<n;i++){
            cin>>m;
            sum+=m;
        }
        int f=n+1,cnt=0;
        for(i=sum+1;i<=sum+5;i++){
            if(i%f==1){
                cnt++;
            }
        }
        cout<<5-cnt<<endl;
    }
    return 0;
}