import java.util.concurrent.*;

class RRTask implements Runnable {
    private final int threadId;

    public RRTask(int threadId) {
        this.threadId = threadId;
    }

    @Override
    public void run() {
        for (int i = 1; i <= 5; i++) {  // Each thread runs 5 times
            System.out.println("Thread " + threadId + " is running (iteration " + i + ")");
            Thread.yield();  // Simulate Round-Robin by yielding CPU time
            try {
                Thread.sleep(100);  // Simulate time slice
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        }
    }
}

public class Main {
    public static void main(String[] args) {
        int numThreads = 3;
        ExecutorService executor = Executors.newFixedThreadPool(numThreads);  // Fixed thread pool simulates CPU scheduling

        for (int i = 1; i <= numThreads; i++) {
            executor.execute(new RRTask(i));
        }

        executor.shutdown();  // Initiates an orderly shutdown of the executor
    }
}