using System;

namespace _06Cake
{
    class Cake
    {
        static void Main(string[] args)
        {
            int cakeWidth = int.Parse(Console.ReadLine());
            int cakeHeight = int.Parse(Console.ReadLine());

            int cakePieces = cakeWidth * cakeHeight;

            int takenPieces = 0;
            int eatenPieces = 0;
            string command = Console.ReadLine();
            command = command.ToUpper();

            while (command != "STOP")
            {
                takenPieces = int.Parse(command);
                eatenPieces += takenPieces;
                if (cakePieces <= eatenPieces)
                {
                    cakePieces = Math.Abs(cakePieces - eatenPieces);
                    Console.WriteLine($"No more cake left! You need {cakePieces} pieces more.");
                    break;
                }
                command = Console.ReadLine();
            }
            if (command == "STOP")
            {
                cakePieces = cakePieces - eatenPieces;
                Console.WriteLine($"{cakePieces} pieces are left.");
            }
        }
    }
}