#include <iostream> using namespace std; int main() { int a ; cin >> a; if ( a <= 150) { printf ("%.1f",a *0.4463); } if ( a <= 400 && a>= 151) { printf ("%.1f",150 * 0.4463 + ( a - 150) *0.4663 ); } if( a >=401) { printf ("%.1f", 150*0.4463 + (400-150)*0.4663 + (a-400)*0.5663); } return 0 ; }