/* Linked List (empty), shows structure of classes and initial members */

class Node  {
   public int value;
   public Node next;  
  
   // Constructor
   public Node(int i) { /* blank for now */ }
  
   // Method
   public void displayLink() { /* blank for now */ }
}

class LinkedList {
  // uses Node class
  private Node first;        // private link to the first element 
  public void LinkedList(){} // constructor sets first to null
  public boolean isEmpty(){} // returns true if list is empty
}