using System;

public class Program

{

    public static void Main()

    {

        int book1 = 300;

        int book2 = 200;

        int book3 = 100;

        int total = book1+book2+book3;

        String discount;

        if(total >= 500)

            discount = "100";

        else

            discount = "50";

        Console.WriteLine(book1);

        Console.WriteLine(book2);

        Console.WriteLine(book3);

        Console.WriteLine("Total = "+total);

        Console.WriteLine("Discount = " + discount);

    }

}