topic206

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Published: Aug 9, 2023 License: GPL-3.0 Imports: 1 Imported by: 0

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206.反转链表

1. 题目描述

给你单链表的头节点 head ,请你反转链表,并返回反转后的链表。  

示例 1:


输入:head = [1,2,3,4,5]
输出:[5,4,3,2,1]

示例 2:


输入:head = [1,2]
输出:[2,1]

示例 3:


输入:head = []
输出:[]

 

提示:

  • 链表中节点的数目范围是 [0, 5000]
  • -5000 <= Node.val <= 5000  

进阶: 链表可以选用迭代或递归方式完成反转。你能否用两种方法解决这道题?

标签 递归 链表

2. 解题

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