using System;

public class Program

{

    public static void Main()

    {

        int money = 0;

        Console.WriteLine("紅茶10元、奶茶15元、咖啡20元，請問要買幾杯?");

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

        for(int i = 1 ; i <= a ; i++) 

        {

            Console.WriteLine("請問第{0}杯要甚麼飲料，紅茶請輸入1、奶茶請輸入2、咖啡請輸入3:",i);

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

            if( b == 1 )

        {

             money = money + 10;

        }

        else if( b == 2 )

        {

             money = money + 15;

        }

        else

        {

             money = money + 20;

        }

            string A  = a.ToString() +money ;

        }   

    Console.WriteLine("總共")+Console.WriteLine("A")+Console.WriteLine("元");

    }

}