import java.util.concurrent.locks.ReentrantLock;
import java.util.concurrent.locks.Lock;

class Monitor {
    private Lock l?s = new ReentrantLock();
    private int st?rsteTall = -1;

    public void hentTall(int tall) {
        l?s.lock();
        try {
            if (tall > st?rsteTall) {
                st?rsteTall = tall;
                System.out.println(st?rsteTall);
            }
        } finally {
            l?s.unlock();
        }
    }

    public int st?rsteTall() {
        return st?rsteTall;
    }
}