using System;

public class Program

{

    public class Node

    {

        public int val;

        public Node next;

        public Node(int i)

        {

            val= i;

            next = null;

        }

    }

    public class Queue

    {

        Node head;

        Node tail;

        public Queue()

        {

            this.head = this.tail = null;

        }

        public void Enqueue(int key)

        {

            Node temp = new Node(key);

            if(this.tail == null) //first node

            {

                this.head = this.tail = temp;

                Console.WriteLine("Added first node " + tail.val);

            }

            this.tail.next = temp; 

            this.tail = temp;

        }

        public int Dequeue()

        {

            return 0;

        }

    }

    public static void Main()

    {

        Queue q = new Queue();

        int count = Convert.ToInt32(Console.ReadLine());

        for(int i=0; i < count; i++)

        {

            q.Enqueue(i);

        }

    }

}