//Monitor

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

class Bankkonto {

    int saldo = 0;
    Lock laas = new ReentrantLock();
    Condition ikkeTomt = laas.newCondition();

    public void settInn(int belop){
        laas.lock();
        try{
            saldo += belop;
            System.out.println("Satt inn "+belop+" kroner, ny saldo er "+saldo);
            ikkeTomt.signalAll();
        }finally{
            laas.unlock();
        }
    }

    public void taUt(int belop) throws InterruptedException{
        laas.lock();
        try{
            while (saldo < belop){
                ikkeTomt.await();
            }
            saldo -= belop;
            System.out.println("Tok ut "+belop+" kroner, ny saldo er "+saldo);
        }finally{
            laas.unlock();
        }
    }

}