using System;

public class Program

{

    public static void Main()

    {

        //1 決定參數 及 型別

        int pay = 0;

        //2 讀取消費者消費多少錢

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

        Console.WriteLine("消費金額:"+pay);

        if(pay<1000){

            Console.WriteLine("消費金額 "+pay);

        }

        else

        {

            Console.WriteLine("最後金額 "+(pay*0.8));

        }

    }

}

​

​