#include <iostream> #include <iomanip> using namespace std; int main() { double price; cin >> price; double cost = 0.0; if(price<100) cost=price; else if(price>=100&&price<500) cost=price*0.9; else if(price>=500&&price<2000) cost=price*0.8; else if(price>=2000&&price<5000) cost=price*0.7; else cost=price*0.6; cout << setiosflags(ios::fixed) << setprecision(1) << cost << endl; return 0; }