using System;

public class Program

{

    public static void Main()

    {

        double coupon , money , Area , Baht;

        char ans ;

        Console.Write("Input total price :");

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

        Console.Write("Do you have coupon [y/Y] :");

        ans=char.Parse(Console.ReadLine());

        Console.Write("-------------------------------------");

        if (ans == 'y' || ans == 'Y')

        {

        Console.Write("\nHow many discount <%> :");

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

        Area =money*(coupon/100);

        Console.Write("Disecoun from coupon <{0}%> = {1} Baht" , coupon , Area );

        Baht =money-Area;

        }

        else if (money > 2000)

        {

        Area =money*0.10;

        Console.Write("\nDisecoun from promotion = {0} ", Area);

        Baht =money-Area;

        }

        else 

        Baht = money ;

        Console.Write("\nNet Price = {0:N} Baht." , Baht);

    }

}