VMware Coding Challenge: Removing Duplicates Entries

 1     static LinkedListNode removeDuplicates(LinkedListNode list) {
 2         LinkedListNode cur = list;
 3         HashSet<Integer> set = new HashSet<Integer>();
 4         set.add(list.val);
 5         while (cur.next != null) {
 6             if (!set.contains(cur.next.val)) {
 7                 set.add(cur.next.val);
 8                 cur = cur.next;
 9             }
10             else {
11                 cur.next = cur.next.next;
12             }
13         }
14         return list;
15 
16     }