using System;

public class Program

{

    public static void Main()

    {

        double pay = 0;

        Console.WriteLine("輸入金額");

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

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

        if(pay>1000){

            pay = pay * 0.8;

            Console.WriteLine("折扣金額" + pay);

        }

        else{

            Console.WriteLine("折扣未達標準");

        }

    }

}