#include<bits/stdc++.h>
using namespace std;
int main()
{
	int a;
	double s;
	cin>>a;
	
	if(a<1.3){
	 	s=60;
	}else 
	 	s=120;	
	
 	printf("%.1f",s);
	return 0;
}

/**************************************************************
	Problem: 1037
	User: ct001
	Language: C++
	Result: Wrong Answer
****************************************************************/