#include<cstdio>
using namespace std;
int main(){
	double a,b;
	cin>>a;
	if(a<=150)
	{
	  b=a*0.4463;
      cout<<b;
}
	if((a>150)&&(a<=400))
    {
    	b=150*0.4463+(a-150)*0.4663;
    	cout<<b;
	}
	if(a>400)
	{
		b=150*0.4463+250*0.4663+(a-400)*0.5663;
	    cout<<b;
	}
	printf("%.1lf\n",a,b);
	return 0;
}