class Main {
    public static void main(String[] args) {

        Prioritetsk?<Integer> liste = new Prioritetsk?<>();

        for (int i = 0; i <= 40; i++) {
            liste.add(i);
        }

        for (int i = 0; i <= 10; i++) {
            System.out.print(liste.pop() + " ");
        }
        System.out.println();
        System.out.println();
    }
}