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 sh…

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 sh…

Nothing special. Just take care of corner cases. class Solution { public: /** * @param head a ListNode * @oaram v1 an integer * @param v2 an integer * @return a new head of singly-linked list */ ListNode* swapNodes(ListNode* head, int v1, int v2) { i…

题目如下: Given the head of a linked list, we repeatedly delete consecutive sequences of nodes that sum to 0 until there are no such sequences. After doing so, return the head of the final linked list.  You may return any such answer. (Note that in the e…

""" Given the head of a linked list, we repeatedly delete consecutive sequences of nodes that sum to 0 until there are no such sequences. After doing so, return the head of the final linked list. You may return any such answer. (Note that i…

作者: 负雪明烛 id: fuxuemingzhu 个人博客:http://fuxuemingzhu.cn/ 目录 题目描述 题目大意 解题方法 preSum + 字典 日期 题目地址:https://leetcode.com/problems/remove-zero-sum-consecutive-nodes-from-linked-list/ 题目描述 Given the head of a linked list, we repeatedly delete consecutive sequ…

Yet Another Source Code for LintCode Current Status : 232AC / 289ALL in Language C++, Up to date (2016-02-10) For more problems and solutions, you can see my LintCode repository. I'll keep updating for full summary and better solutions. See cnblogs t…

链表基础 链表(Linked List)相比数组(Array),物理存储上非连续.不支持O(1)时间按索引存取:但链表也有其优点,灵活的内存管理.允许在链表任意位置上插入和删除节点.单向链表结构一般如下: //Definition for singly-linked list. struct ListNode { int val; ListNode *next; ListNode(int x) : val(x), next(NULL) {} }; 相关LeetCode题: 707. Design…

Preface Usually, memory allocation of OS is fast, especially the computer has just started. But over time memory fragmentation becomes serious, memory allocation and access will become more and more slowly. Memory fragmentation caused by the continuo…

循环链表是另一种形式的链式存贮结构.它的特点是表中最后一个结点的指针域指向头结点,整个链表形成一个环. 单循环链表——在单链表中,将终端结点的指针域NULL改为指向表头结点或开始结点即可. 循环链表的特点是无须增加存储量,仅对表的链接方式稍作改变,即可使得表处理更加方便灵活. 注意:         ①循环链表中没有NULL指针.涉及遍历操作时,其终止条件就不再是像非循环链表那样判别p或p->next是否为空,而是判别它们是否等于某一指定指针,如头指针或尾指针等.         ②在单链表中,…