Cake

namespace _1
{
    internal class Program
    {
        static void Main(string[] args)
        {
            int width = int.Parse(Console.ReadLine());
            int height = int.Parse(Console.ReadLine());
            int count = width * height;
            string command = Console.ReadLine();

            while (command != "STOP")
            {
                int piecesToTake = int.Parse(command);


                if (piecesToTake > count)
                {
                    Console.WriteLine($"No more cake left! You need {piecesToTake - count} pieces more.");
                    break;
                }
                count -= piecesToTake;

                if (count <= 0)
                {
                    break;
                }
                command = Console.ReadLine();
            }
            if (command == "STOP")
            {
                Console.WriteLine($"{count} pieces are left.");
            }
        }
    }
}