using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("");

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

        string hour = Console.ReadLine();

        int P_money = int.Parse(hour)*40;

        Console.WriteLine("停車費總共");

        Console.WriteLine(P_money);

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

        string answer = Console.ReadLine();

        if (answer == "n")

        {

            Console.WriteLine("您的停車費為"+ P_money +"元");

        }

        else

        {

            int price = 0;

            while (answer =="y")

            {

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

                string B_price = Console.ReadLine();

                price = price + int.Parse(B_price);

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

                answer = Console.ReadLine();

            }

            int discount = price/500;

            int total = (int.Parse(hour)- discount)*40;

            if (total>0)

            {

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

            }

            else

            {

                Console.WriteLine("您本次的停車費為0元");

            }

        }

    }

}