import java.util.BitSet;
import java.util.concurrent.Semaphore;

public class Main {

     private static final int THREADS = 1;
     public static Semaphore semaphore = new Semaphore(1);


     public static BitSet set;
     public static int size;


        public Main(int x) {
            size = x + 1;
            set = new BitSet(size);
            set.flip(2, size);

        }

    public static void main(String[] args) throws InterruptedException {

                Main bitSetSieveMain = new Main(60);
                Thread [] threadsTab = new Thread[THREADS];

                for(int i=0; i<threadsTab.length; i++) threadsTab[i] = new Thread(new Sito(i));

                long start = System.nanoTime();


                for(int i=0; i<threadsTab.length; i++)
                {
                    threadsTab[i].start();

                }
                for(int i=0; i<threadsTab.length; i++)
                {
                    threadsTab[i].join();
                }

                long time = System.nanoTime() - start;

                System.out.println(time + " nano seconds to perform " + set.length() + " numbers " + bitSetSieveMain);



    }





    public String toString() {
        return set.toString();
    }



}