#include<bits/stdc++.h>
using namespace std;
int main(){
	int a,b;
	cin>>a;
	if(a>10){
		b=(25*3*5+119)/120;
	}
	if(a>=7&&a<=10){
		b=(15*3*5+119)/120;
	}
	if(a>=3&&a<=6){
		b=(5*3*5+119)/120;
	}
	cout<<b;			
}
/**************************************************************
	Problem: 1310
	User: toughuatao1
	Language: C++
	Result: Accepted
	Time:14 ms
	Memory:2072 kb
****************************************************************/