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[Algorithm] Tree: Lowest Common Ancestor

By given a tree structure, task is to find lowest common ancestor: For example, LCA(4, 5) --> >3 LCA(4,2) --> 1 LCA(3, 5) --> 3 LCA(6, 6) --> 6 Solution to solve the problem: Found two path to the given two node, then compare two list to se…

Data Structure Binary Tree: Lowest Common Ancestor in a Binary Tree

http://www.geeksforgeeks.org/lowest-common-ancestor-binary-tree-set-1/ #include <iostream> #include <vector> #include <algorithm> #include <queue> #include <stack> #include <string> #include <fstream> #include <…

[LeetCode] 1123. Lowest Common Ancestor of Deepest Leaves 最深叶结点的最小公共父节点

Given a rooted binary tree, return the lowest common ancestor of its deepest leaves. Recall that: The node of a binary tree is a leaf if and only if it has no children The depth of the root of the tree is 0, and if the depth of a node is d, the depth…

[CareerCup] 4.7 Lowest Common Ancestor of a Binary Search Tree 二叉树的最小共同父节点

4.7 Design an algorithm and write code to find the first common ancestor of two nodes in a binary tree. Avoid storing additional nodes in a data structure. NOTE: This is not necessarily a binary search tree. LeetCode上的原题,请参见我之前的博客Lowest Common Ancest…

[LeetCode] Lowest Common Ancestor of a Binary Tree 二叉树的最小共同父节点

Given a binary tree, find the lowest common ancestor (LCA) of two given nodes in the tree. According to the definition of LCA on Wikipedia: “The lowest common ancestor is defined between two nodes v and w as the lowest node in T that has both v and w…

[LeetCode] Lowest Common Ancestor of a Binary Search Tree 二叉搜索树的最小共同父节点

Given a binary search tree (BST), find the lowest common ancestor (LCA) of two given nodes in the BST. According to the definition of LCA on Wikipedia: “The lowest common ancestor is defined between two nodes v and w as the lowest node in T that has…

48. 二叉树两结点的最低共同父结点(3种变种情况)[Get lowest common ancestor of binary tree]

[题目] 输入二叉树中的两个结点,输出这两个结点在数中最低的共同父结点. 二叉树的结点定义如下:  C++ Code  123456   struct BinaryTreeNode {     int value;     BinaryTreeNode *left;     BinaryTreeNode *right; }; [分析] 求数中两个结点的最低共同结点是面试中经常出现的一个问题.这个问题有几个变种. [变种1] 第一个变种是二叉树是一种特殊的二叉树:查找二叉树.也就是树是排序过的,位…

[LeetCode]Lowest Common Ancestor of a Binary Search Tree

Given a binary search tree (BST), find the lowest common ancestor (LCA) of two given nodes in the BST. According to the definition of LCA on Wikipedia: “The lowest common ancestor is defined between two nodes v and w as the lowest node in T that has…

数据结构与算法(1)支线任务4——Lowest Common Ancestor of a Binary Tree

题目如下:https://leetcode.com/problems/lowest-common-ancestor-of-a-binary-tree/ Given a binary tree, find the lowest common ancestor (LCA) of two given nodes in the tree. According to the definition of LCA on Wikipedia: “The lowest common ancestor is def…

Lowest Common Ancestor of a Binary Search Tree

Given a binary search tree (BST), find the lowest common ancestor (LCA) of two given nodes in the BST. According to the definition of LCA on Wikipedia: “The lowest common ancestor is defined between two nodes v and w as the lowest node in T that has…