using System;

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                    public class Program

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{

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    public static void Main()

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    {

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        string tenkh , dv , msg;

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        int tong = 0 , so_luong = 0;

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        Console.WriteLine("----- dich vu kham rang -----");

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        Console.Write("nhap ten khach hang: ");

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        tenkh = Console.ReadLine();

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        Console.WriteLine("---dich vu ---: ");

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        Console.WriteLine("1. cao voi");

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        Console.WriteLine("2. nho rang");

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        Console.WriteLine("3. nho rang + cao voi");

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        Console.Write("nhan so 1 hoac 2 hoac 3: ");

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        dv = Console.ReadLine();

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        switch (dv)

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        {

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            case "1":

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                tong = 100000;

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                break;

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            case "2":

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                Console.Write("so luong rang: ");

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                so_luong = Convert.ToInt32(Console.ReadLine());

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                tong = so_luong * 150000;

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                break;

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            case "3":

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                Console.Write("so luong rang: ");

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                so_luong = Convert.ToInt32(Console.ReadLine());

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                tong = so_luong * 150000;

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                tong += 100000;

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                break;

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            default:

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                msg = "vui long chon dich vu";

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                break;

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        }

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        Console.WriteLine("hoa don");

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        Console.WriteLine("ten khach hang : {0}",tenkh);

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        Console.WriteLine("tong tien: {0}",tong);

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    }

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}

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