import java.util.concurrent.locks.Condition;
import java.util.concurrent.locks.Lock;
import java.util.concurrent.locks.ReentrantLock;
    
class SharedCounter {
    int counter = 0;
    final Lock lock = new ReentrantLock();
    final Condition counterReachedFive = lock.newCondition();

    void incrementCounter() {
        lock.lock();
        try {
            counter++;
            System.out.println("Counter incremented to: " + counter);
            if (counter == 5) {
                counterReachedFive.signalAll();
            }
        } finally {
            lock.unlock();
        }
    }

    void waitForCounterToReachFive() throws InterruptedException {
        lock.lock();
        try {
            while (counter < 5) {
                System.out.println("Waiting for the counter to reach 5...");
                counterReachedFive.await();
            }

            System.out.println("The counter has reached 5!");
        } finally {
            lock.unlock();
        }
    }
}