import  java.util.concurrent.atomic.*;

public class ParkingLot{
    private int capacity;
    AtomicInteger cars;

    boolean isFull(){
        if(cars.get() == capacity){
            return true;
        }
        return false;
    }

    boolean isEmpty(){
        if(cars.get() == 0){
            return true;
        }
        return false;
    }

    ParkingLot(int capacity){
        this.capacity=capacity;
        cars= new AtomicInteger(0);

        //Producer
        new Thread(){
            public void run(){
                synchronized(cars){
                    while(true){
                        while(isFull()){
                            try{
                                cars.wait();
                            }
                            catch(InterruptedException ex){}
                        }
                        System.out.println("TOTAL CARS:"+cars.get()+"/"+capacity+"  |   Adding new car");
                        cars.getAndIncrement();
                        try{
                            sleep(1000);
                            cars.notify();
                        }
                        catch(InterruptedException ex){}
                    }
                }
            }
        }.start();

        //Consumer
        new Thread(){
            public void run(){
                synchronized(cars){
                    while(true){
                        while(isEmpty()){
                            try{
                                cars.wait();
                            }
                            catch(InterruptedException ex){}
                        }
                        System.out.println("TOTAL CARS:"+cars.get()+"/"+capacity+"  | Removing a car");
                        cars.getAndDecrement();
                        try{
                            sleep(1000);
                            cars.notify();
                        }
                        catch(InterruptedException ex){}
                    }
                }
            }
        }.start();
    }

    public static void main(String args[]){
        ParkingLot p= new ParkingLot(10);
    }
}