using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("您好，停車費每小時40元，消費累積500元可折抵1小時，請輸入您的停車時數：");

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

        Console.WriteLine("停車費總共");

        Console.WriteLine(x*40);

        Console.WriteLine("請問您今日是否有在館內消費(y/n)");

        string a = Console.ReadLine();

        int y = 0;

        while(a == "y")

        {

            Console.WriteLine("請輸入您的發票消費金額：");

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

            y = y+t;

            Console.WriteLine("請問是否還有消費發票金額(y/n)");

            a = Console.ReadLine();

        }

        Console.WriteLine(y);

        Console.WriteLine("您本次的停車費為");

        Console.WriteLine(x*40);

    }

}