https://codeforces.com/problemset/problem/272/A

#include<bits/stdc++.h>
using namespace std;
int a[105],n,sum;
int main(void)
{
	cin>>n;
	for(int i=1;i<=n;i++) cin>>a[i],sum+=a[i];
	int cnt=0;
	for(int i=1;i<=5;i++)
	{
		if((sum+i)%(n+1)!=1) cnt++;	
	}
	cout<<cnt<<endl;
}