#include<bits/stdc++.h>
using namespace std;
int main(){
	int a;
	float k;
	cin>>a;
	if(a>=10){
		k=(25*3*5+119)/120;
	}
	if(a>=7&&a<10){
		k=(15*3*5+119)/120;
	}
	if(a>=3&&a<=6){
		k=(5*3*5+119)/120;
	}
	printf("%d",k);
}
/**************************************************************
	Problem: 1310
	User: tonghuawei
	Language: C++
	Result: Wrong Answer
****************************************************************/