import java.util.HashSet;
import java.util.concurrent.Semaphore;
public class KindergartenShow {

    public static class Child extends Thread
    {
        private static Semaphore seats=new Semaphore(6);
        private static Semaphore canPlay=new Semaphore(0);
        private static Semaphore lock=new Semaphore(1);
        private static Semaphore newCycle=new Semaphore(0);
        int groupNo=0;
        int totalNo=0;
        int sumPermits=0;
        int numExecutions=0;
        int sumQueue=0;
        public Child (int numRuns)
        {
            super(String.valueOf(numRuns));
        }

        public void execute () throws InterruptedException
        {
            seats.acquire();
            System.out.println("dete vleze");
            lock.acquire();
            groupNo++;
            if(groupNo==6)
            {
                canPlay.release(6);
                System.out.println("Pretstavata pocinja");
            }
            lock.release();
            canPlay.acquire(); // ova go vide
            lock.acquire();
            groupNo--; // ova go vide
            System.out.println("dete iskoci");
            totalNo++; // ova go vide
            if(groupNo==0)
            {
                seats.release(6); //cycleov go vide
                System.out.println("si idat decata");
            }
            //lock.release(); ova go napisa a ne treba
            if(totalNo==24)
            {
                newCycle.release(24);
                System.out.println("zavrsi cel ciklus");
                totalNo=0;
            }
            lock.release();
            newCycle.acquire();
        }
    }

    public static void main(String [] args) throws InterruptedException {
        HashSet<Child> threads = new HashSet<>();
        for(int i=0;i<24;i++)
        {
            Child c=new Child(i);
            threads.add(c);
        }
        for(Child c: threads)
        {
            c.start();
        }
        for(Child c: threads)
        {
            c.join(2000);
        }
        for (Child c: threads)
        {
            if(c.isAlive())
            {
                c.interrupt();
                System.out.println("Possible deadlock");
            }
        }
        System.out.println("Pretstavata zavrsi");
    }


}