Remove Duplicates from Sorted List

删除排序链表中的重复元素
最新推荐文章于 2023-01-13 08:10:00 发布
最新推荐文章于 2023-01-13 08:10:00 发布
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分类专栏： Leetcode
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本文链接：https://blog.youkuaiyun.com/sherry_0720/article/details/43341543
本文介绍如何在保持链表排序的情况下，移除所有重复出现的元素，仅保留每个值首次出现的节点。

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.

用pre，和now分别指向头节点，和头节点的下一个，比较两个节点，当相等时，把now的下一个节点赋给pre的下一个节点，即删除了当前now,

当不相等时，pre与now分别移动一个。


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