package diplooura;
import java.io.*;
import java.util.*;

public class main
{
private static BufferedReader stdin=new BufferedReader(new InputStreamReader(System.in));

	public static void main(String[] args) 
	{
    try
    {
    ArrayList l=new ArrayList();
    int number=1;
    Item b;
    Dequeue sos=new Dequeue();
    while(number!=0)
    {
    System.out.println("Dose enan arithmo:");
    String a=stdin.readLine();
    number=Integer.parseInt(a);
    b=new Item(number);
    sos.inject(b);
    }
    sos.print();
    while(!sos.isEmpty())
    {
    Item n=sos.pop();
    l.add(n.getKey()*3);
    }
    int i;
    for(i=0;i<l.size();i++)
    {
    System.out.print(l.get(i)+" ");
    }
    }
    catch(Exception e)
    {
    	System.out.println("Uparxei sfalma.");
    }
	}

}
