Find the middle node of a linked list. Example Given 1->2->3, return the node with value 2. Given 1->2, return the node with value 1. 分析 1 value 1 1->2 value1 1->2->3 value 2 1->2->3->4 value 2 1->2->3->4->5 value 3…

228. Middle of Linked List Find the middle node of a linked list. Example Example 1: Input: 1->2->3 Output: 2 Explanation: return the value of the middle node. Example 2: Input: 1->2 Output: 1 Explanation: If the length of list is even return the…

Java Algorithm Problems 程序员的一天 从开始这个Github已经有将近两年时间, 很高兴这个repo可以帮到有需要的人. 我一直认为, 知识本身是无价的, 因此每逢闲暇, 我就会来维护这个repo, 给刷题的朋友们一些我的想法和见解. 下面来简单介绍一下这个repo: README.md: 所有所做过的题目 ReviewPage.md: 所有题目的总结和归纳(不断完善中) KnowledgeHash2.md: 对所做过的知识点的一些笔记 SystemDesign.md:…

1.链表数据结构 内存利用率高:动态分配 2.链表类定义 单向链表节点 public calss ListNode { int val =0; ListNode next = null; public void Node(int val_) { this.val = val_; this.next = null; } } 单向链表类: public class LinkedList { private ListNode head = null; private ListNode tail = n…

最近开始刷lintcode,记录下自己的答案,数字即为lintcode题目号,语言为python3,坚持日拱一卒吧... (一). 回文字符窜问题(Palindrome problem) 627. Longest Palindrome 给出一个包含大小写字母的字符串.求出由这些字母构成的最长的回文串的长度是多少. 数据是大小写敏感的,也就是说,"Aa" 并不会被认为是一个回文串 输入 : s = "abccccdd" 输出 : 7 说明 : 一种可以构建出来的最长回…

Implement an algorithm to delete a node in the middle of a singly linked list, given only access to that node. Have you met this question in a real interview?     Example Given 1->2->3->4, and node 3. return 1->2->4 LeetCode上的原题,请参见我之前的博客De…

Given a non-empty, singly linked list with head node head, return a middle node of linked list. If there are two middle nodes, return the second middle node. Example 1: Input: [1,2,3,4,5] Output: Node 3 from this list (Serialization: [3,4,5]) The ret…

1. 原始题目 Given a non-empty, singly linked list with head node head, return a middle node of linked list. If there are two middle nodes, return the second middle node. Example 1: Input: [1,2,3,4,5] Output: Node 3 from this list (Serialization: [3,4,5])…

题目要求 Given a non-empty, singly linked list with head node head, return a middle node of linked list. If there are two middle nodes, return the second middle node. 题目分析及思路 题目给出一个非空单链表,要求返回链表单的中间结点.可以将链表中的结点保存在list中,直接获取中间结点的索引即可. python代码 # Definition…

Given a non-empty, singly linked list with head node head, return a middle node of linked list. If there are two middle nodes, return the second middle node. Example 1: Input: [1,2,3,4,5] Output: Node 3 from this list (Serialization: [3,4,5]) The ret…