Cake1

import java.util.Scanner;

public class Cake1 {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);

        int width = Integer.parseInt(scanner.nextLine());
        int length = Integer.parseInt(scanner.nextLine());
        String command = scanner.nextLine();

        int pieces = width * length;

        while (!command.equals("STOP")) {
            int takenPieces = Integer.parseInt(command);
            pieces = pieces - takenPieces;

            if (pieces < 0) {
                System.out.printf("No more cake left! You need %d pieces more.", Math.abs(pieces));
                break;
            }
            command = scanner.nextLine();
        }
        if (command.equals("STOP")) {
            System.out.printf("%d pieces are left.",pieces);
        }

    }
}