题目: 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.http://i.cnblogs.com/EditPosts.aspx?opt=1 Your algorithm should use only constant space.…

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, onl…

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, onl…

做完这个题目,感觉LeetCode的题目出的真好... 这种题,如果让我在面试时候纸上写代码,肯定会挂的. 我昨天晚上看的题目,昨天脑子是懵的,放下了.今天早上来做. 一开始做,提交,果然错了.写的代码如下 struct ListNode * swap_2_nodes(struct ListNode *p) //把p指向的两个节点交换位置 { struct ListNode * q; if( p == NULL || (q = p->next) == NULL ) { return p; //不…

Swap Nodes in Pairs [LeetCode] https://leetcode.com/problems/swap-nodes-in-pairs/ Total Accepted: 95332 Total Submissions: 270806 Difficulty: Easy Question Given a linked list, swap every two adjacent nodes and return its head. For example, Given 1->…

# -*- coding: utf8 -*-'''__author__ = 'dabay.wang@gmail.com' 24: Swap Nodes in Pairshttps://oj.leetcode.com/problems/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 sh…

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 val…

1. 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…

题目:swap nodes in pairs <span style="font-size:18px;">/** * LeetCode Swap Nodes in Pairs * 题目:输入一个链表,要求将链表每相邻的两个节点交换位置后输出 * 思路:遍历一遍就可以,时间复杂度O(n) * Definition for singly-linked list. * public class ListNode { * int val; * ListNode next; * 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 val…