using System;

public class Program

{

    public static void Main()

    {

        double MV,TB;

        Console.WriteLine("Monto de Venta");

        MV=double.Parse(Console.ReadLine());

        if(MV>=0 && MV<1000){

        TB=(0*MV)/100;

            Console.WriteLine(TB);

        }

        else{

            if(MV>=1000 && MV<5000){

            TB=(3*MV) / 100;

                    Console.WriteLine(TB);  

            }

            else{

            if(MV>=2000){

            TB=(8*MV)/100;

                Console.WriteLine(TB);  

            }else{

            Console.WriteLine("No hay datos");

                }

            }

        }

    }

}