Remove Duplictes from Sorted List.java

//83. Remove Duplicates from Sorted List
class Solution {
  public ListNode deleteDuplicates(ListNode head) {
    ListNode curr = head;

    while (curr != null) {
      while (curr.next != null && curr.val == curr.next.val)
        curr.next = curr.next.next;
      curr = curr.next;
    }

    return head;
  }
}