import java.util.concurrent.Semaphore;

import org.omg.PortableServer.POAManagerPackage.State;


public class Ispit {


	static Semaphore teacher;
	static Semaphore studenti;
	static Semaphore lock;
	static int br;
	static Semaphore ready;
	static Semaphore readyToLeave;
	static Semaphore done;

	public static void init()
	{
		teacher = new Semaphore(1);
		lock = new Semaphore(1);
		studenti = new Semaphore(0);
		br=0;
		ready = new Semaphore(0);
		readyToLeave = new Semaphore(0);
		done = new Semaphore(0);
	}
	public static void Teacher() throws InterruptedException
	{
		teacher.acquire();
		state.teacherEnter();
		studenti.release(50);
		ready.acquire();
		state.distirbuteTests();
		state.endExam();

		readyToLeave.release(50);
		done.acquire();

		teacher.release();

	}
	public static void Student() throws InterruptedException
	{

		studenti.acquire();
		state.studentEnter();

		lock.acquire();
		br++;
		lock.release();

		if(br==50)
			ready.release(); //ako vlegle tocno 50

		readyToLeave.acquire();
		state.studentLeave();

		lock.acquire();
		br--;
		lock.release();

		if(br==0)
			done.release();


	}
}