06.Cake

import java.util.Scanner;

public class Cake {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        int length = Integer.parseInt(scanner.nextLine());
        int width = Integer.parseInt(scanner.nextLine());
        String input = scanner.nextLine();
        int cakesPieces = 0;
        int cakeSize = 0;
        boolean noCake = false;
        while (!input.equals("STOP")) {
            int cakeNumber = Integer.parseInt(input);
            cakeSize = length * width;
            cakesPieces += cakeNumber;
            if (cakesPieces > cakeSize) {
                noCake = true;
                break;
            }
            input = scanner.nextLine();
        }
        if (noCake) {
            System.out.printf("No more cake left! You need %d pieces more.", (cakesPieces - cakeSize));
        } else {
            System.out.printf("%d pieces are left.", cakeSize - cakesPieces);

        }
    }
}