http://www.lintcode.com/en/problem/swap-two-nodes-in-linked-list/# 先找到两个节点,再执行交换。有一个corner case须要注意:就是两个节点相邻的情况。 C++ classSolution{public:/** * @param head a ListNode * @oaram v1 an integer * @param v2 an integer * @return a new head of singly-...
Given a linked list and two values v1 and v2. Swap the two nodes in the linked list with values v1 and v2. It's guaranteed there is no duplicate values in the linked list. If v1 or v2 does not exist in the given linked list, do nothing. Notice You should swap the two nodes ...
[LeetCode] 1721. Swapping Nodes in a Linked List You are given theheadof a linked list, and an integerk. Returnthe head of the linked list after swapping the values of thekthnode from the beginning and thekthnode from the end (the list is 1-indexed). Example 1: Input: head = [1...
25. Reverse Nodes in k-Group Given a linked list, reverse the nodes of a linked list k at a time and return its modified list. k is a positive integer and is less than or equal to the length of the linked list. If the number of nodes is not a multiple of k then left-out node...
A natural choice for the default constructor is to make the node the sole element of a circular doubly-linked list. struct node { node* prev = this; node* next = this; }; What if you also want to add a node after an existing node? Well, we could add a constructor for that. ...
百度试题 结果1 题目 In a doubly linked list, each node has links to the previous and next nodes in the list.A、正确B、错误 相关知识点: 试题来源: 解析 A 反馈 收藏
The value of each node in the linked list will be in the range[1, 10^6]. 1 <= m,n <= 1000 删除链表 M 个节点之后的 N 个节点。 给定链表 head 和两个整数 m 和 n. 遍历该链表并按照如下方式删除节点: 开始时以头节点作为当前节点. ...
one-pass solution就是用两个指针,找到两个node直接交换val即可 如果题目要求必须实现node的交换,则需要找到两个node的前一个node,进行swap 需要特殊判断两个node相邻的情况 /** * Definition for singly-linked list. * type ListNode struct { * Val int ...
As you can see in my WaypointNode prevId has a unique constraint For my linked list there will always be one Node that has no prev Node and one Node that has no next Node, head and tail respectively. I was facing the unique constraint validation error whenever I tried to insert a new...
Leetcode: Swap Nodes in Pairs 2014-05-10 01:32 − 1 Given a linked list, swap every two adjacent nodes and return its head. 2 3 For example, 4 Given 1->2->3->4, you should return the list a... neverlandly 0 253