LeetCode OJ 83. Remove Duplicates from Sorted List

Given a sorted linked list, delete all duplicates such that each element appear only once.

For example,
Given 1->1->2, return 1->2.
Given 1->1->2->3->3, return 1->2->3.

 public class Solution {
     public ListNode deleteDuplicates(ListNode head) {
         if(head==null || head.next==null) return head;
         ListNode temp = head;

         while(temp.next!=null){
             if(temp.val == temp.next.val){
                 temp.next = temp.next.next;
             }
             else{
                 temp = temp.next;
             }
         }
         return head;
     }
 }