import java.util.*;
public class Main { public static void main(String[] args) { Scanner console = new Scanner(System.in); int price = console.nextInt(); int cost = 0;
//write your code here......
if (price < 100) {
cost = price;
}else if (price < 500) {
cost = (int) (price * 0.9);
}else if (price < 2000){
cost = (int) (price * 0.8);
}else if (price < 5000){
cost = (int) (price * 0.7);
}else {
cost = (int) (price * 0.6);
}
System.out.println(cost);
}
}