Cake

package com.company;

import java.util.Scanner;

public class Main {

    public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);
        int lenght = Integer.parseInt(scan.nextLine());
        int width = Integer.parseInt(scan.nextLine());
        int piecesTaken = 0;
        int allPieces = lenght * width;
        String stop = "";
        while (piecesTaken < allPieces) {
            stop = scan.nextLine();
            if (!stop.equals("STOP")) {
                int portion = Integer.parseInt(stop);
                piecesTaken = piecesTaken + portion;
            } else {
                System.out.printf("%d pieces are left.", allPieces - piecesTaken);
                break;
            }
        }
        if (piecesTaken >= allPieces) {
            System.out.printf("No more cake left! You need %d pieces more.", piecesTaken - allPieces);
        }
    }
}