#include<bits/stdc++.h>
using namespace std;
int main(){
	int x,n;
	cin>>x;
	3<x;
	if (x>10){
		n=3*25*5/120;
		printf("%d",n);
	}
	else if (7<=x<=10){
		n=3*15*5/120;
		printf("%d",n);
	}
	else{
		n=3*5*5/120;
		printf("%d",n);
	}
	return 0;
}
/**************************************************************
	Problem: 1310
	User: xiaojingxuan
	Language: C++
	Result: Wrong Answer
****************************************************************/