Given a binary search tree (BST), find the lowest common ancestor (LCA) of two given nodes in the BST. According to thedefinition 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 as descendants (wh...
https://leetcode.com/problems/lowest-common-ancestor-of-a-binary-search-tree/leetcode.com/problems/lowest-common-ancestor-of-a-binary-search-tree/ 中文版描述 给定一个二叉搜索树, 找到该树中两个指定节点的最近公共祖先。百度百科中最近公共祖先的定义为:“对于有根树 T 的两个结点 p、q,最近公共...
给的是BST(无相同节点),那么每个节点肯定大于左子树中的最大,小于右子树种的最小。根据这个特性,找LCA就简单多了。 分三种情况: (1)p和q都在root左边,那么往root左子树递归。 (2)在右同理。 (3)一左一右的,那么root->val肯定大于其中的1个,小于另一个。 AC代码 python3 迭代 AC代码 递归 AC代码...
FindHeaderBarSize You are given therootof a binary search tree (BST) and an integerval. Find the node in the BST that the node's value equalsvaland return the subtree rooted with that node. If such a node does not exist, returnnull....
Can you solve this real interview question? Lowest Common Ancestor of a Binary Search Tree - Given a binary search tree (BST), find the lowest common ancestor (LCA) node of two given nodes in the BST. According to the definition of LCA on Wikipedia [htt
二叉搜索树的最近公共祖先 - 力扣(LeetCode)leetcode-cn.com/problems/lowest-common-ancestor-of-a-binary-search-tree/ 题目描述 给定一个二叉搜索树, 找到该树中两个指定节点的最近公共祖先。 百度百科中最近公共祖先的定义为:“对于有根树 T 的两个结点 p、q,最近公共祖先表示为一个结点 x,满足 x 是...
[LeetCode] 98. Validate Binary Search Tree(是否是二叉搜索树) ☆☆☆,描述解析二叉搜索树,其实就是节点n的左孩子所在的树,每个节点都小于节点n。节点n的右孩子所在的树,每个节点都大于节点n。定义子树的最大最小值比如:左孩子要小于父节点;左孩子n的右孩子要大于n
Subtree of Another Tree -https://leetcode.com/problems/subtree-of-another-tree/ Construct Binary Tree from Preorder and Inorder Traversal -https://leetcode.com/problems/construct-binary-tree-from-preorder-and-inorder-traversal/ Validate Binary Search Tree -https://leetcode.com/problems/validate...
http://www.programcreek.com/2014/04/leetcode-binary-search-tree-iterator-java/ Anyway, Good luck, Richardo! My code: /** * Definition for binary tree * public class TreeNode { * int val; * TreeNode left; * TreeNode right; * TreeNode(int x) { val = x; } ...
Given the root of a Binary Search Tree (BST), convert it to a Greater Tree such that every key of the original BST is changed to the original key plus the sum of all keys greater than the original key in BST. As a reminder, a binary search tree is a tree that satisfies these cons...