#include <bits/stdc++.h>
using namespace std;

int main()
{
	double c,d,e,f,g=0;
	cin>>f;
	if(f<=150)
	{
		g=f*0.4463;
		printf("%.1lf",g);
		cout<<g<<endl;
	}
    if(f<=400)
	{
		g=(f-150)*0.4663+150*0.4463;
		printf("%.1lf",g);
		cout<<g<<endl;
	}
	else 
	{
		g=(f-400)*0.5663+250*0.4663+150*0.4463;
		printf("%.1lf",g);
		cout<<g;
	}
	return 0;
}