// Accessing linked list

import java.io.*;

class List
{
   int value;
   List next;
}

class Linklist0
{
   public static void main(String[] args) throws IOException
   {
      List head, ptr;

      /* ===================================
         Empty list
         =================================== */
      head = null;    // Start with an empty list....

      /* ===================================
         Create list element with value 6 
         =================================== */
      ptr = new List();          // Make a new list element
      ptr.value = 6;

      /* ===================================
         Insert new list element at head
         =================================== */
      ptr.next = head;
      head = ptr;

      System.out.print("List: ");
      System.out.print(head.value);
      System.out.println();

      /* ===================================
         Create list element with value 3 
         =================================== */
      ptr = new List();          // Make a new list element
      ptr.value = 3;

      /* ===================================
         Insert new list element at head
         =================================== */
      ptr.next = head;
      head = ptr;

      System.out.print("List: ");
      System.out.print(head.value);
      System.out.print(" ");
      System.out.print(head.next.value);
      System.out.println();

      /* ===================================
         Create list element with value 18 
         =================================== */
      ptr = new List();          // Make a new list element
      ptr.value = 18;

      /* ===================================
         Insert new list element at head
         =================================== */
      ptr.next = head;
      head = ptr;

      System.out.print("List: ");
      System.out.print(head.value);
      System.out.print(" ");
      System.out.print(head.next.value);
      System.out.print(" ");
      System.out.print(head.next.next.value);
      System.out.println();
   }
}