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

class Bankkonto {

    int saldo = 0;
    Lock l?s = new ReentrantLock();
    Condition ikkeTomt = l?s.newCondition();

    public void settInn(int bel?p){
        l?s.lock();
        try{
            saldo += bel?p;
            ikkeTomt.signalAll();
        }finally{
            l?s.unlock();
        }
    }
    
    public void taUt(int bel?p) throws InterruptedException{ 
        l?s.lock();
        try{
            while (saldo < bel?p){
                ikkeTomt.await();
            }
            saldo -= bel?p;
            //System.out.println("Tok ut "+bel?p+", ny saldo: "+saldo);
        }finally{
            l?s.unlock();
        }

    }

}