import java.util.ArrayList;
import java.util.List;

class CONST
{
	public static int n = 10;

	public static List<Integer> list = new ArrayList<>();

	public static int rem;
}

public class Labfour2 {

    public static void main(String[] args) {

    	BlockingQueue queue = new BlockingQueue();

        Squares task1 =  new Squares(queue);
		PrintSquares task2 = new PrintSquares(queue);

        new Thread(task1).start();
        new Thread(task2).start();
    }
}
// Класс BlockingQueue, хранящий очередь
class BlockingQueue{

   private int product=0;
//   private int crt=0;
   public synchronized void get() {
      while (product<1) {
         try {
            wait();
         }
         catch (InterruptedException e) {
         }
      }
      product--;
//      System.out.println(CONST.list.get(0));
    CONST.rem = CONST.list.get(0);
    CONST.list.remove(0);
      notify();
   }
   public synchronized void put(int value) {
       while (product>=CONST.n) {
         try {
            wait();
         }
         catch (InterruptedException e) {
         }
      }
      product++;

      CONST.list.add(value);
//      crt++;
      notify();
   }
}
// класс Производитель
class Squares implements Runnable{

	BlockingQueue store;
    Squares(BlockingQueue store){
       this.store=store;
    }
    public void run(){
        for (int i = 0; i <= CONST.n; i++) {
            store.put(i*i);
        }
    }
}
// Класс Потребитель
class PrintSquares implements Runnable{

	BlockingQueue store;
     PrintSquares(BlockingQueue store){
       this.store=store;
    }
    public void run(){
        for (int i = 0; i < CONST.n; i++) {
            store.get();
            System.out.println(CONST.rem);
        }
    }
}