import java.util.LinkedList;

class SharedResource {
    private LinkedList buffer = new LinkedList<>();
    private int capacity = 2;

    public void produce() throws InterruptedException {
        synchronized (this) {
            while (buffer.size() == capacity) {
                wait();
            }

            int item = (int) (Math.random() * 100);
            System.out.println("Produced: " + item);
            buffer.add(item);

            notify();
        }
    }

    public void consume() throws InterruptedException {
        synchronized (this) {
            while (buffer.isEmpty()) {
                wait();
            }

            int item = buffer.removeFirst();
            System.out.println("Consumed: " + item);

            notify();
        }
    }
}

class Producer extends Thread {
    private SharedResource sharedResource;

    public Producer(SharedResource sharedResource) {
        this.sharedResource = sharedResource;
    }

    @Override
    public void run() {
        try {
            while (true) {
                sharedResource.produce();
                Thread.sleep(1000);
            }
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
    }
}

class Consumer extends Thread {
    private SharedResource sharedResource;

    public Consumer(SharedResource sharedResource) {
        this.sharedResource = sharedResource;
    }

    @Override
    public void run() {
        try {
            while (true) {
                sharedResource.consume();
                Thread.sleep(1000);
            }
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
    }
}

public class ProducerConsumerExample {
    public static void main(String[] args) {
        SharedResource sharedResource = new SharedResource();

        Producer producer = new Producer(sharedResource);
        Consumer consumer = new Consumer(sharedResource);

        producer.start();
        consumer.start();
    }
}