[leetcode]83. Remove Duplicates from Sorted List有序链表去重

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

Example 1:

Input: 1->1->2
Output: 1->2

Example 2:

Input: 1->1->2->3->3
Output: 1->2->3

题意：

有序链表去重

思路：

代码：

 class Solution {
     public ListNode deleteDuplicates(ListNode head) {
         if(head == null) return head;
         ListNode cur = head;
         while(cur.next != null){
             if(cur.val == cur.next.val){
                 cur.next = cur.next.next;
             }else{
                 cur = cur.next;
             }
         }
         return head;
     }
 }