题目描述: Given a linked list, swap every two adjacent nodes and return its head. For example, Given 1->2->3->4, you should return the list as 2->1->4->3. Your algorithm should use only constant space. You may not modify the values in the li…

Swap Nodes in Pairs  Given a linked list, swap every two adjacent nodes and return its head. For example, Given 1->2->3->4, you should return the list as 2->1->4->3. Your algorithm should use only constant space. You may not modify the v…

Swap Nodes in Pairs 描述 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. 示例: 给定 1->2->3->4, 你应该返回 2->1->4->3. 说明: 你的算法只能使用常数的额外空间. 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. 思路 该题属于基本的链表操作题. 设置一个虚拟头结点dummyHead 设置需要交换的两个节点分别为node1.node2,同时设置node2的下一个节点next 在这一轮操作中 将nod…

Given a linked list, swap every two adjacent nodes and return its head. You may not modify the values in the list's nodes, only nodes itself may be changed. Example: Given ->->->, you should ->->->. 奇数位和偶数位互换,若是奇数个,不用管最后一个 解法一:(C++) List…

Given a linked list, swap every two adjacent nodes and return its head. You may not modify the values in the list's nodes, only nodes itself may be changed. Example: Given 1->2->3->4, you should return the list as 2->1->4->3. 这道题不算难,是基本的…

题目标签:Linked List 题目给了我们一组 linked list,让我们把每对nodes 互换位置. 新键一个dummy node,然后遍历list,每次建立 s1 和 s2 记录两个点,然后互换位置,具体看code. Java Solution: Runtime:  0 ms, faster than 100 % Memory Usage: 34 MB, less than 100 % 完成日期:05/22/2019 关键点:换位置时候先后顺序 /** * Definition fo…

Given a linked list, swap every two adjacent nodes and return its head. For example, Given 1->2->3->4, you should return the list as 2->1->4->3. Your algorithm should use only constant space. You may not modify the values in the list, on…

Given a linked list, swap every two adjacent nodes and return its head. You may not modify the values in the list's nodes, only nodes itself may be changed. Example: Given 1->2->3->4, you should return the list as 2->1->4->3. -----------…

Given a linked list, swap every two adjacent nodes and return its head. You may not modify the values in the list's nodes, only nodes itself may be changed. Example: Given 1->2->3->4, you should return the list as 2->1->4->3. 题意: 给定一个链表,…

题目链接: https://leetcode.com/problems/swap-nodes-in-pairs/?tab=Description   Problem: 交换相邻的两个节点     如上图所示,递归进行交换.从最尾端开始,当最尾端只有一个节点时,停止交换 否则执行 swap(head.next)    参考代码:   package leetcode_50; /** * * @author pengfei_zheng * 交换相邻节点 */ public class Solutio…