package Exam_03_September_2017;

        import java.util.Scanner;

public class Cake {
    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        int width = Integer.parseInt(input.nextLine());
        int lenght = Integer.parseInt(input.nextLine());

        int pieces = width*lenght;
        while (pieces>=0){
            String  comand = input.nextLine();
            if ("STOP".equals(comand)){
                System.out.printf("%d pieces are left.",pieces);
            }else{
                int takenPiec = Integer.parseInt(comand);
                pieces-=takenPiec;
            }
        }
        System.out.printf("No more cake left! You need %d pieces more.",Math.abs(pieces));
    }
}