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

class TallMonitor{

    private Lock laas = new ReentrantLock();
    private int storstTall = -1;

    public void settInnTall(int tall){
        laas.lock();
        try{
            if(tall > storstTall){
                storstTall = tall;
            }
        }finally{
            laas.unlock();
        }
    }

    public int hentStorst(){
        return storstTall;
    }
}