Ancestor 第5页

LCA(lowest common ancestor)并查集解法

首先是最近公共祖先的概念(什么是最近公共祖先？)：在一棵没有环的树上，每个节点肯定有其父亲节点和祖先节点，而最近公共祖先，就是两个节点在这棵树上深度最大的公共的祖先节点。换句话说，就是两个点在这棵树上距离最近的公共祖先节点。所以LCA主要是用来处理当两个点仅有唯一一条确定的最短路径时的路径。有人可能会问：那他本身或者其父亲节点是否可以作为祖先节点呢？答案是肯定的，很简单，按照人的亲戚观念来说，你的

LOVETEDA·2020-07-01 11:47

面试题 04.08. 首个共同祖先

链接：https://leetcode-cn.com/problems/first-common-ancestor-lcci/题解：后序遍历/****Definitionforabinarytreenode

INGNIGHT·2020-07-01 10:29

Lowest Common Ancestor of a Binary Tree

采用递归，分别在左子树和右子树里面查找，如果都能找到，当前节点就是最近共同祖先如果只能在一个树找到，说明这个数就是最近共同祖先structTreeNode*lowestCommonAncestor(structTreeNode*root,structTreeNode*p,structTreeNode*q){if(root==NULL||root==p||root==q)returnroot;str

larrymusk·2020-06-30 21:43

Lowest Common Ancestor of a Binary Tree(递归法）

Givenabinarytree,findthelowestcommonancestor(LCA)oftwogivennodesinthetree./***Definitionforabinarytreenode.*structTreeNode{*intval;*TreeNode*left;*TreeNode*right;*TreeNode(intx):val(x),left(NULL),righ

张荣华_csdn·2020-06-30 19:39

Lowest Common Ancestor of a Binary Tree（迭代法）

Givenabinarytree,findthelowestcommonancestor(LCA)oftwogivennodesinthetree.AccordingtothedefinitionofLCAonWikipedia:“ThelowestcommonancestorisdefinedbetweentwonodespandqasthelowestnodeinTthathasbothpan

张荣华_csdn·2020-06-30 19:39

算法系列——Lowest Common Ancestor of a Binary Tree

题目描述Givenabinarytree,findthelowestcommonancestor(LCA)oftwogivennodesinthetree.AccordingtothedefinitionofLCAonWikipedia:“ThelowestcommonancestorisdefinedbetweentwonodesvandwasthelowestnodeinTthathasbot

BridgeGeorge·2020-06-30 08:48

leetcode 236: Lowest Common Ancestor of a Binary Tree

LowestCommonAncestorofaBinaryTreeTotalAccepted:1628TotalSubmissions:5660Givenabinarytree,findthelowestcommonancestor(LCA)oftwogivennodesinthetree.AccordingtothedefinitionofLCAonWikipedia:“Thelowestcom

xudli·2020-06-30 03:33

leetcode 235: Lowest Common Ancestor of a Binary Search Tree

LowestCommonAncestorofaBinarySearchTreeTotalAccepted:203TotalSubmissions:511Givenabinarysearchtree(BST),findthelowestcommonancestor(LCA)oftwogivennodesintheBST.AccordingtothedefinitionofLCAonWikipedia

xudli·2020-06-30 03:33

Lowest Common Ancestor of a Binary Search Tree

Givenabinarysearchtree(BST),findthelowestcommonancestor(LCA)oftwogivennodesintheBST.AccordingtothedefinitionofLCAonWikipedia:“ThelowestcommonancestorisdefinedbetweentwonodesvandwasthelowestnodeinTthat

xinqrs01·2020-06-30 02:07

Lowest Common Ancestor II

LowestCommonAncestorII.png解題思路：既然有給parent的指針先把A點跟Ａ所有parents都存入set(搜尋快速O(1))接著在檢查B點跟B的所有parents有沒有出現在剛剛存的清單之中C++code:/**DefinitionofParentTreeNode:classParentTreeNode{public:intval;ParentTreeNode*paren

一枚煎餅·2020-06-29 00:27

Leetcode-236题:Lowest Common Ancestor of a Binary Tree

题目Givenabinarytree,findthelowestcommonancestor(LCA)oftwogivennodesinthetree.思路分别求出跟节点到p,q的路径，那么路径的共同前缀的末尾即为所求。代码#Definitionforabinarytreenode.#classTreeNode(object):#def__init__(self,x):#self.val=x#se

八刀一闪·2020-06-28 23:35

Lowest Common Ancestor of a Binary Search Tree

publicTreeNodelowestCommonAncestor(TreeNoderoot,TreeNodep,TreeNodeq){while(root!=null){if((root.val-p.val)>0&&(root.val-q.val)>0)root=root.left;elseif((root.val-p.val)root.val)returnlowestCommonAncest

宇智波爱编程·2020-06-28 22:04

LintCode 474 [Lowest Common Ancestor II]

原题给一棵二叉树和二叉树中的两个节点，找到这两个节点的最近公共祖先LCA。两个节点的最近公共祖先，是指两个节点的所有父亲节点中（包括这两个节点），离这两个节点最近的公共的节点。每个节点除了左右儿子指针以外，还包含一个父亲指针parent，指向自己的父亲。对于下面的这棵二叉树4/\37/\56LCA(3,5)=4LCA(5,6)=7LCA(6,7)=7解题思路根据p，一路向上找到所有的parent，

Jason_Yuan·2020-06-28 19:35

Lowest Common Ancestor of a Binary Search Tree

Givenabinarysearchtree(BST),findthelowestcommonancestor(LCA)oftwogivennodesintheBST.“ThelowestcommonancestorisdefinedbetweentwonodesvandwasthelowestnodeinTthathasbothvandwasdescendants(whereweallowano

sherwin29·2020-06-28 09:10

2017-12-06

2.我在本篇文章中学到的怦然心动的单词:distinctive有特色的anxiety焦虑ancestor祖宗3.我在本篇文章中最喜欢的一句话：Peoplecomeinallshapesandsizes.4

应数二班王秀磊·2020-06-27 15:39

[LeetCode] Lowest Common Ancestor of a Binary Tree

LowestCommonAncestorofaBinaryTreeGivenabinarytree,findthelowestcommonancestor(LCA)oftwogivennodesinthetree.AccordingtothedefinitionofLCAonWikipedia:“Thelowestcommonancestorisdefinedbetweentwonodesvand

wangshaner1·2020-06-27 13:21

【LeetCode】236 Lowest Common Ancestor of a Binary Tree

LowestCommonAncestorofaBinaryTreeTotalAccepted:1207TotalSubmissions:4143MySubmissionsQuestionSolutionGivenabinarytree,findthelowestcommonancestor(LCA)oftwogivennodesinthetree.Accordingtothedefinitiono

哎-哭泣的鱼·2020-06-27 05:37

Lowest Common Ancestor of a Binary Tree

题目：给定一个棵二叉树的两个节点o1/o2，求两个节点的最近公共祖先(LCA)难度：Medium思路：方法1.记录路径：先遍历二叉树，分别得到从根节点到o1/o2的两个路径存储在vector中，遍历两个vector得到最近的相等的节点方法2.不记录路径：通过先序遍历二叉树，先判断当前遍历的节点是否为o1/o2,如果是则直接返回当前节点，否则继续遍历左子树、右子树，如果左子树返回结果和右子树返回结果

HAHAHA-·2020-06-27 04:31

python tornado 框架使用（1）

importloggingimportlogging.configimportosfromunipathimportPathlogging.config.fileConfig(Path(Path(__file__).ancestor

shao326·2020-06-26 08:04

[LeetCode 236] Lowest Common Ancestor of a Binary Tree

Givenabinarytree,findthelowestcommonancestor(LCA)oftwogivennodesinthetree.AccordingtothedefinitionofLCAonWikipedia:“ThelowestcommonancestorisdefinedbetweentwonodesvandwasthelowestnodeinTthathasbothvan

Mavs·2020-06-26 07:51

java.lang.IllegalStateException: Could not find method true(View) in a parent or ancestor Context fo

logcat：EXCEPTION:mainjava.lang.IllegalStateException:Couldnotfindmethodtrue(View)inaparentorancestorContextforandroid:onClickattributedefinedonviewclassandroid.widget.TextViewatandroid.view.ViewDeclar

佛一脚·2020-06-26 04:48

Lowest Common Ancestor of a Binary Search Tree 二叉搜索树的最近公共祖先（Java）

题目:Givenabinarysearchtree(BST),findthelowestcommonancestor(LCA)oftwogivennodesintheBST.AccordingtothedefinitionofLCAonWikipedia:“ThelowestcommonancestorisdefinedbetweentwonodespandqasthelowestnodeinTt

volador_r·2020-06-25 21:50

Lowest Common Ancestor of a Binary Tree(LCA)

Givenabinarytree,findthelowestcommonancestor(LCA)oftwogivennodesinthetree.Accordingtothe definitionofLCAonWikipedia:“ThelowestcommonancestorisdefinedbetweentwonodesvandwasthelowestnodeinTthathasbothva

i逆天耗子丶·2020-06-25 08:24

Lowest Common Ancestor of a Binary Tree（python+cpp）

题目：Givenabinarytree,findthelowestcommonancestor(LCA)oftwogivennodesinthetree.AccordingtothedefinitionofLCAonWikipedia:“ThelowestcommonancestorisdefinedbetweentwonodespandqasthelowestnodeinTthathasboth

小湉湉·2020-06-25 00:14

二叉树两个节点的最近公共祖先

转自https://www.geeksforgeeks.org/lowest-common-ancestor-binary-tree-set-1/LowestCommonAncestorinaBinaryTreeGivenabinarytree

DreamNotOver·2020-06-24 10:53

Lowest Common Ancestor of a Binary Tree

236.LowestCommonAncestorofaBinaryTreeGivenabinarytree,findthelowestcommonancestor(LCA)oftwogivennodesinthetree.AccordingtothedefinitionofLCAonWikipedia:“Thelowestcommonancestorisdefinedbetweentwonodes

liuchenjane·2020-06-24 06:18

三星研究院上机题（Common Ancestor in Tree）

Youaretofindtheclosestcommonancestoroftwoverticesinabinarytree.Forexample,thecommonancestorsofvertices8and13inthefigurebelowarevertices3and1.Amongthem,vertex3istheclosesttothevertex8and13.Andthesizeof

IIYMGF·2020-06-23 15:43

【LeetCode】236.Lowest Common Ancestor of a Binary Tree(Medium)解题报告

LeetCode】236.LowestCommonAncestorofaBinaryTree(Medium)解题报告题目地址：https://leetcode.com/problems/lowest-common-ancestor-of-a-binary-tree

郝春雨·2020-06-23 12:19

Lowest Common Ancestor of a Binary Tree 解题报告（Python）

fuxuemingzhu个人博客：http://fuxuemingzhu.cn/目录题目描述题目大意解题方法日期题目地址：https://leetcode.com/problems/lowest-common-ancestor-of-a-binary-tree

负雪明烛·2020-06-23 09:34

[Java]Leetcode236 Lowest Common Ancestor of a Binary Tree

Givenabinarytree,findthelowestcommonancestor(LCA)oftwogivennodesinthetree.AccordingtothedefinitionofLCAonWikipedia:“ThelowestcommonancestorisdefinedbetweentwonodesvandwasthelowestnodeinTthathasbothvan

青人·2020-06-23 09:13

LeetCode 236 Lowest Common Ancestor of a Binary Tree解题报告

Givenabinarytree,findthelowestcommonancestor(LCA)oftwogivennodesinthetree.AccordingtothedefinitionofLCAonWikipedia:“ThelowestcommonancestorisdefinedbetweentwonodesvandwasthelowestnodeinTthathasbothvan

bemf168·2020-06-22 17:27

二叉树共同祖先（c语言，非递归）

假设二叉树采用二叉链表方式存储，root指向根结点，p所指结点和q所指结点为二叉树中的两个结点，编写一个计算它们的最近的共同祖先，函数定义如下：BiTNode*nearest_ancestor(BiTreeroot

张三保护协会会长·2020-06-21 13:02

Lowest Common Ancestor of a Binary Tree

Givenabinarytree,findthelowestcommonancestor(LCA)oftwogivennodesinthetree.AccordingtothedefinitionofLCAonWikipedia:“ThelowestcommonancestorisdefinedbetweentwonodesvandwasthelowestnodeinTthathasbothvan

weixin_34075551·2020-06-21 11:30

A 1143 Lowest Common Ancestor (30分)

一、技术总结题目的意思就是找到，给出两个结点的最小的祖先结点，其实这题关键就是，它是一棵搜索二叉树，我们只要发现有个结点是在给出的两个结点之间，那么这个结点就一定是最小的最先结点。使用mapmp,用于接收二叉树的结点，用于遍历找到那个加在所给结点的祖先结点。；最后就是按照题意进行输出即可。二、参考代码#include#include#includeusingnamespacestd;mapmp;i

睿晞·2020-06-19 20:00

二叉树求最近的公共祖先

主要也是参考了leetcode的官方解答题目:https://leetcode-cn.com/problems/lowest-common-ancestor-of-a-binary-tree思路1.递归比较容易想到的

愛與誠·2020-05-16 11:41

flutter:报错之： Looking up a deactivated widget's ancestor is unsafe

错误内容[ERROR:flutter/lib/ui/ui_dart_state.cc(157)]UnhandledException:Lookingupadeactivatedwidget’sancestorisunsafe我理解的错误原因找不到靠谱的上下文，也就是我所传递的上下文无效了。1.出现错误的地方voidcountdownAlertTime(BuildContextcontext){pr

No Big Deal·2020-04-23 22:37

Lowest Common Ancestor(最近公共祖先)

问题GiventherootandtwonodesinaBinaryTree.Findthelowestcommonancestor(LCA)ofthetwonodes.Thelowestcommonancestoristhenodewithlargestdepthwhichistheancestorofbothnodes.NoticeAssumetwonodesareexistintree.Ha

天街孤独·2020-04-11 13:44

二叉树题目

LCAhttps://leetcode.com/problems/lowest-common-ancestor-of-a-binary-treehttps://leetcode.com/problems

丁不想被任何狗咬·2020-04-10 16:49

【模板】数据结构

x:(p[x]=ancestor(p[x]));}booltest(intx,inty,boolun=false){if((x=ancestor(x))==(y=ancestor(y)))returntrue

刘通1997·2020-04-09 11:00

Lowest Common Ancestor of a Binary Search Tree

Java，答案的想法很好，利用了二分树的特性/***Definitionforabinarytreenode.*publicclassTreeNode{*intval;*TreeNodeleft;*TreeNoderight;*TreeNode(intx){val=x;}*}*/publicclassSolution{publicTreeNodelowestCommonAncestor(TreeN

hyhchaos·2020-04-06 21:41

Lowest Common Ancestor of a Binary Search Tree

题目来源Givenabinarysearchtree(BST),findthelowestcommonancestor(LCA)oftwogivennodesintheBST.AccordingtothedefinitionofLCAonWikipedia:“ThelowestcommonancestorisdefinedbetweentwonodesvandwasthelowestnodeinT

我叫胆小我喜欢小心·2020-04-06 05:25

Lowest Common Ancestor of a Binary Tree

oftwogivennodesinthetree.Accordingtothe[definitionofLCAonWikipedia](https://en.wikipedia.org/wiki/Lowest_common_ancestor

风起天蓝·2020-04-05 16:32

Lowest Common Ancestor of a Binary Tree

一、题目说明题目236.LowestCommonAncestorofaBinaryTree，在一个二叉树中找两个节点的最近公共祖先。难度是Medium！二、我的解答这个用二叉树的递归遍历，稍加改造即可：classSolution{public:TreeNode*lowestCommonAncestor(TreeNode*root,TreeNode*p,TreeNode*q){if(root==NU

siwei718·2020-04-05 06:00

Lowest Common Ancestor of a Binary Tree

Givenabinarytree,findthelowestcommonancestor(LCA)oftwogivennodesinthetree.AccordingtothedefinitionofLCAonWikipedia:“ThelowestcommonancestorisdefinedbetweentwonodesvandwasthelowestnodeinTthathasbothvan

exialym·2020-04-03 06:53

Lowest Common Ancestor of a Binary Tree

DefinitionofLCAThelowestcommonancestorisdefinedbetweentwonodesvandwasthelowestnodeinTthathasbothvandwasdescendants(whereweallowanodetobeadescendantofitself).Algorithm1findpathfromrootton1findpathfromr

宋翰要长肉·2020-03-31 09:25

Lowest Common Ancestor of a Binary Search Tree

Givenabinarysearchtree(BST),findthelowestcommonancestor(LCA)oftwogivennodesintheBST.AccordingtothedefinitionofLCAonWikipedia:“ThelowestcommonancestorisdefinedbetweentwonodesvandwasthelowestnodeinTthat

a_void·2020-03-29 23:37

Leetcode-235题:Lowest Common Ancestor of a Binary Search Tree

题目Givenabinarytree,findthelowestcommonancestor(LCA)oftwogivennodesinthetree.AccordingtothedefinitionofLCAonWikipedia:“ThelowestcommonancestorisdefinedbetweentwonodesvandwasthelowestnodeinTthathasbothv

八刀一闪·2020-03-28 18:17

2018-12-12xpath语法

=判断是否不相等and多条件连接符，并且or多条件连接符，或者text()取展现文本()打包contains()包含*通配符，代表所有节点xpath轴语法符号含义ancestor选取当前节点的所有先辈（

雁_9587·2020-03-27 09:21

170240 梁云丽

1.每个人都是都有自己的个性2.distinctive有特色的sumup总结，归纳element部件，组成部分respond响应sorrow悲哀，悲伤observe观察，监视trait特性，品质ancestor

240梁云丽·2020-03-23 08:07

Lowest Common Ancestor of a Binary Search Tree 待改进

Givenabinarysearchtree(BST),findthelowestcommonancestor(LCA)oftwogivennodesintheBST.AccordingtothedefinitionofLCAonWikipedia:“ThelowestcommonancestorisdefinedbetweentwonodesvandwasthelowestnodeinTthat

exialym·2020-03-21 14:49

推荐频道

Ancestor

LCA(lowest common ancestor)并查集解法

面试题 04.08. 首个共同祖先

Lowest Common Ancestor of a Binary Tree

Lowest Common Ancestor of a Binary Tree(递归法）

Lowest Common Ancestor of a Binary Tree（迭代法）

算法系列——Lowest Common Ancestor of a Binary Tree

leetcode 236: Lowest Common Ancestor of a Binary Tree

leetcode 235: Lowest Common Ancestor of a Binary Search Tree

Lowest Common Ancestor of a Binary Search Tree

Lowest Common Ancestor II

Leetcode-236题:Lowest Common Ancestor of a Binary Tree

Lowest Common Ancestor of a Binary Search Tree

LintCode 474 [Lowest Common Ancestor II]

Lowest Common Ancestor of a Binary Search Tree

2017-12-06

[LeetCode] Lowest Common Ancestor of a Binary Tree

【LeetCode】236 Lowest Common Ancestor of a Binary Tree

Lowest Common Ancestor of a Binary Tree

python tornado 框架使用 （1）

[LeetCode 236] Lowest Common Ancestor of a Binary Tree

java.lang.IllegalStateException: Could not find method true(View) in a parent or ancestor Context fo

Lowest Common Ancestor of a Binary Search Tree 二叉搜索树的最近公共祖先（Java）

Lowest Common Ancestor of a Binary Tree(LCA)

Lowest Common Ancestor of a Binary Tree（python+cpp）

二叉树两个节点的最近公共祖先

Lowest Common Ancestor of a Binary Tree

三星研究院上机题（Common Ancestor in Tree）

【LeetCode】236.Lowest Common Ancestor of a Binary Tree(Medium)解题报告

Lowest Common Ancestor of a Binary Tree 解题报告（Python）

[Java]Leetcode236 Lowest Common Ancestor of a Binary Tree

LeetCode 236 Lowest Common Ancestor of a Binary Tree解题报告

二叉树共同祖先（c语言，非递归）

Lowest Common Ancestor of a Binary Tree

A 1143 Lowest Common Ancestor (30分)

二叉树求最近的公共祖先

flutter:报错之： Looking up a deactivated widget's ancestor is unsafe

Lowest Common Ancestor(最近公共祖先)

二叉树题目

【模板】数据结构

Lowest Common Ancestor of a Binary Search Tree

Lowest Common Ancestor of a Binary Search Tree

Lowest Common Ancestor of a Binary Tree

Lowest Common Ancestor of a Binary Tree

Lowest Common Ancestor of a Binary Tree

Lowest Common Ancestor of a Binary Tree

Lowest Common Ancestor of a Binary Search Tree

Leetcode-235题:Lowest Common Ancestor of a Binary Search Tree

2018-12-12xpath语法

170240 梁云丽

Lowest Common Ancestor of a Binary Search Tree 待改进

python tornado 框架使用（1）