06.Cake

using System;

namespace Cake
{
    class Program
    {
        static void Main(string[] args)
        {

            int widthPieceCake = int.Parse(Console.ReadLine());
            int lenghtPieceCake = int.Parse(Console.ReadLine());

            int piecesCakeTaken = 0;
            int singleTakenPieces = 0;
            int wholeCake = widthPieceCake * lenghtPieceCake;
            string command = "";




            while (wholeCake >= piecesCakeTaken)
            {
                command = Console.ReadLine();
                if (command == "STOP")
                {
                    int piecesLeft = wholeCake - piecesCakeTaken;
                    Console.WriteLine($"{piecesLeft} pieces are left.");
                    return;
                }
                singleTakenPieces = int.Parse(command);
                piecesCakeTaken += singleTakenPieces;


            }

            int leftPieces = piecesCakeTaken - wholeCake;
            Console.WriteLine($"No more cake left! You need {leftPieces} pieces more.");
        }
    }
}