Don't dare use the code that I use in 80pts!!!

#include<bits/stdc++.h>
using namespace std;
int main()
{
	int n;
	cin>>n;
	int s=0;
	s+=n/11;
	n%=11;
	s+=n/5;
	n%=5;
	s+=n/1;
	cout<<s;
}

会卡 #1 和 #5 ！！！！！！！！
要用 $dp$ ！！