#include <iostream> #include <cstdio> using namespace std ; int main () { int yongdianliang ; double dianfei ; cin >> yongdianliang ; if (yongdianliang < 150) { dianfei = yongdianliang * 0.4463 ; printf ( "%.1f" , dianfei ) ; } else if (yongdianliang > 150 && yongdianliang < 400) { dianfei = (yongdianliang - 150 ) * 0.4663 + 150 * 0.4463 ; printf ( "%.1f" , dianfei ) ; } else { dianfei = (yongdianliang - 400) * 0.5663 + 150 * 0.4463 + 250 * 0.4663 ; printf ( "%.1f" , dianfei ); } return 0 ; }