import java.util.concurrent.Semaphore;

class Worker implements Runnable {
    private Semaphore sem;
    private int id;

    public Worker(Semaphore sem, int id) {
        this.sem = sem;
        this.id = id;
    }

    public void run() {
        for (int i = 0; i < 5; i++) { // Limit execution to 5 iterations
            try {
                sem.acquire(); // Acquire semaphore
                System.out.println("Thread " + id + " in Critical Section!");
                Thread.sleep(500); // Simulate critical section work
                sem.release(); // Release semaphore
                System.out.println("Thread " + id + " out of Semaphore!");
                Thread.sleep(500); // Simulate non-critical section work
            } catch (InterruptedException e) {
                System.out.println("Thread " + id + " interrupted.");
            }
        }
    }
}

public class Main {
    public static void main(String args[]) {
        Semaphore sem = new Semaphore(1);
        Thread[] bees = new Thread[5];

        // Create and start 5 worker threads
        for (int i = 0; i < 5; i++) {
            bees[i] = new Thread(new Worker(sem, i + 1));
            bees[i].start();
        }
    }
}