* TreeNode(int x) : val(x), left(NULL), right(NULL) {} * };*/classSolution {public: TreeNode* lowestCommonAncestor(TreeNode* root, TreeNode* p, TreeNode*q) {//special casesif(root ==NULL)returnNULL;if(p == root || q ==root)returnroot;if(p ==q)returnp; vector<TreeNode*...
* TreeNode(int x) { val = x; } * }*/publicclassSolution {publicTreeNode lowestCommonAncestor(TreeNode root, TreeNode p, TreeNode q) {if(root ==null)returnnull;if(root == p || root == q)//切断路径,不再向下执行了returnroot; TreeNode leftNode=lowestCommonAncestor(root.left, p, ...
class Solution { public TreeNode lowestCommonAncestor(TreeNode root, TreeNode p, TreeNode q) { TreeNode ancestor = root; while (true) { if (p.val < ancestor.val && q.val < ancestor.val) { ancestor = ancestor.left; } else if (p.val > ancestor.val && q.val > ancestor.val) { ...
1classSolution {2publicTreeNode lowestCommonAncestor(TreeNode root, TreeNode p, TreeNode q) {3if(root.val > p.val && root.val >q.val) {4returnlowestCommonAncestor(root.left, p, q);5}elseif(root.val < p.val && root.val <q.val) {6returnlowestCommonAncestor(root.right, p, q);7...
class Solution { public: TreeNode* lowestCommonAncestor(TreeNode* root, TreeNode* p, TreeNode* q) { int pVal = p->val; int qVal = q->val; int rootVal = root->val; if(pVal < rootVal && qVal < rootVal) { return lowestCommonAncestor(root->left,p,q); ...
Can you solve this real interview question? 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 [https://en.wikipedia.org/wi
LeetCode Top 100 Liked Questions 236. Lowest Common Ancestor of a Binary Tree (Java版; Medium) 题目描述 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 betw...
// #101 Description: Symmetric Tree | LeetCode OJ解法1:递归。 // Solution 1: Recursion. 代码1// Code 1… 朱里 Leetcode | 第8节:记忆化搜索,树(上) 学弱猹发表于一个大学生... LeetCode 的正确使用方式 LeetCode 的题库使用方式LeetCode 的题库是很庞大的。面对庞大的题库,只有正确使用才能达到...
LCA (Lowest Common Ancestor) 中文名称"最近公共祖先"。是指在树中,两个节点的最近的公共根。LeetCode里面的236题讲的就是这个。 实现 方法1:recursion publicTreeNodelca(TreeNode root,TreeNode p,TreeNode q){if(root==null||p==null||q==null){returnnull;}if(root==p||root==q){// 因为root是...
https://leetcode.com/problems/lowest-common-ancestor-of-a-binary-search-tree/description/ 解题思路: 首先得到p和q的最大值和最小值,然后判断是否最大值小于root.val和最小值大于root.val 代码: class Solution { public TreeNode lowestCommonAncestor(TreeNode root, TreeNode p, TreeNode q) { ...