/*
     * Complete the 'condense' function below.
     *
     * The function is expected to return an INTEGER_SINGLY_LINKED_LIST.
     * The function accepts INTEGER_SINGLY_LINKED_LIST head as parameter.
     */

    /*
     * For your reference:
     *
     * SinglyLinkedListNode {
     *     int data;
     *     SinglyLinkedListNode next;
     * }
     *
     */

  public static SinglyLinkedListNode condense(SinglyLinkedListNode head) {
         if ( head == null ) return null;
  Node nextItem = head.next;
  while ( nextItem != null && head.data == nextItem.data ) {
    nextItem = nextItem.next;
  }
  head.next = RemoveDuplicates( nextItem );
  return head;