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);
}

}