import java.util.concurrent.locks.*;

public class Monitor {
    private int sharedCounter = 0;
    private Lock laas = new ReentrantLock();

    public void increment() {
        laas.lock();
        try {
            sharedCounter++;
        } finally {
            laas.unlock();
        }
    }

    public int getCounter() {
        return sharedCounter;
    }
}