[leetcode]83. Remove Duplicates from Sorted List有序链表去重(有重去重)

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;
    }
}