using System;

public class Program

{

    public static void Main()

    {

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

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

        Console.Write("\nDo you have coupon (y/Y n/N) : ");

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

        Console.WriteLine("-------------------------------------------------------------");

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

        {

            Console.Write("How man discount (%) : ");

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

            int price_discount = price*coupon_discount/100;

            Console.WriteLine("Discount from coupon <{0}%> = {1:N} Baht ",coupon_discount,price_discount);

            Console.Write("Net Price = {0:N} Baht. ",price-price_discount);

        }

        else if(coupon == 'n' && price >=2000 || coupon == 'N' && price >=2000)

        {

            float promotion = price * 10/100;

            Console.WriteLine("Discount form promotion = {0}",promotion);

            Console.Write("Net Price = {0:N} Baht. " , price-promotion);

        }

        else if(coupon == 'n' && price < 2000 || coupon == 'N' && price < 2000)

        {

            Console.Write(" Net price = {0:N} ",price);

        }

​

    }

}