using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("enter monthly salary");

        int salary = int.Parse(Console.ReadLine());

        if (salary < 6000)

        { 

            Console.WriteLine("your taxes are 0 shekels");

        }

        else if ( salary<=10000)

        { 

            int tenTax = salary - 6000;

            int taxes = tenTax/10 ;

            Console.WriteLine("your taxes are "+ taxes);

        }

        else if ( salary >10000 )

        {

            int twenTax = ((salary-10000)/10)*2;

            Console.WriteLine("your taxes are "+( 0 + 400 + twenTax) );

        }

    }

}