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Published: Jul 18, 2021 License: MIT Imports: 0 Imported by: 0

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24. Swap Nodes in Pairs

[中等] 链表


给定一个链表,两两交换其中相邻的节点,并返回交换后的链表。

你不能只是单纯的改变节点内部的值,而是需要实际的进行节点交换。

 

示例:

给定 1->2->3->4, 你应该返回 2->1->4->3.


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Types

type ListNode

type ListNode struct {
	Val  int
	Next *ListNode
}

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