import java.util.concurrent.*;

class MyRunnable implements Runnable {
    public void run() {
        try {
            int randomNum = ThreadLocalRandom.current().nextInt(0, 200);
            Thread.sleep(randomNum);
            System.out.printf("Slept for %d seconds\n", randomNum);
        } catch (InterruptedException e) {
            System.out.println("Interrupted!");
        }
    }
}

class Main {
    public static void main(String[] args) {
        Thread[] n = new Thread[10];
        for (int i = 0; i < 10; i++) {
            n[i] = new Thread(new MyRunnable());
            n[i].start();
        }
        for (int i = 0; i < 10; i++) {
            try {
                n[i].join();
            } catch (InterruptedException e) {
                System.out.println("Interrupted!");
            }
        }
        System.out.println("All threads done!");
    }
}