06. Cake

using System;

namespace Cake
{
    class Program
    {
        static void Main(string[] args)
        {
            int x = int.Parse(Console.ReadLine());
            int y = int.Parse(Console.ReadLine());
            int pieceOfCake = x * y;
            int hungry = 0;
            while (pieceOfCake >= hungry)
            {
                string command = Console.ReadLine();

                if (command == "STOP")
                {
                    break;
                }
                hungry += int.Parse(command);
            }


            if (pieceOfCake >= hungry)
            {
                Console.WriteLine($"{pieceOfCake - hungry} pieces are left.");

            }
            else
            {
                Console.WriteLine($"No more cake left! You need {hungry - pieceOfCake} pieces more.");

            }
        }
    }
}