Warlodya

import java.lang.Math;
import java.util.*;
public class SuperRandom
{
  
  private ArrayList<Integer> numbers;
  private Random rand;
  
  	public static void main(String[] args)
  	{
      		SuperRandom sr=new SuperRandom(10);
      		for(int i=0;i<10;i++)
    		System.out.print(sr.getValue());
  	}
	
  	public SuperRandom(int size){
		rand=new Random();
		numbers=new ArrayList<>();
    		for(int i=0;i<size;i++)
    		numbers.add(i);
 	 }
  
  	public int getValue(){
     		int randomIndex=rand.nextInt(numbers.size());
     		return numbers.remove(randomIndex);
 	}
  
  	public int getSize(){
  		return numbers.size();
 	}
  
}