please refer to my previous post:Lowest Common Ancestor of a Binary Search Tree (BST)or the definition of LCAhere. Using the tree above as an example, the LCA of nodes5and1is3. Please note that LCA for nodes5and4is5.
原题链接在这里:https://leetcode.com/problems/find-distance-in-a-binary-tree/ 题目: Given the root of a binary tree and two integerspandq, returnthe distance between the nodes of valuepand valueqin the tree. The distance between two nodes is the number of edges on the path from one to...
236-Lowest-Common-Ancestor-of-a-Binary-Tree.py 252-Meeting-Rooms.py 383-Ransom-Note.py 40-Combinations-Sum-ii.py 43-Number_of_Connected_Components_in_an_Undirected_Graph.py 509-Fibonacci-Number.py 63-Unique-Paths-II.py 862-Shortest-Subarray-With-Sum-At-Least-K.py ...
Given two binary trees original and cloned and given a reference to a node target in the original tree. The cloned tree is a copy of the original tree. Return a reference to the same node in the cloned tree. Note that you are not allowed to change any of the two trees or the target...
code 代码语言:javascript 代码运行次数:0 运行 AI代码解释 type TreeNode struct { Val int Left *TreeNode Right *TreeNode } var res []int func largestValues(root *TreeNode) []int { res = []int{} preorder(root, 0) return res } func preorder(root *TreeNode, d int) { if root == ...
[1562. 查找大小为 M 的最新分组](https://leetcode.cn/problems/find-latest-group-of-size-m/) [1361. 验证二叉树](https://leetcode.cn/problems/validate-binary-tree-nodes/) [56. 合并区间](https://leetcode-cn.com/problems/merge-intervals/) [435. 无重叠区间](https://leetcode-cn.com/pr...
LeetCode: 287. Find the Duplicate Number 题目描述 Given an array nums containing n + 1 integers where each integer is between 1 and n (inclusive), prove that at least one duplicate number must exist. Assume that there is only one duplicate number, find the duplicate one. ...
int k = (Math.max(leftmax.value, rightmax.value) > midmax.value) ? Math.max(leftmax.value, rightmax.value) : midmax.value; if(k == leftmax.value){return leftmax;} else if(k == rightmax.value){return rightmax;} else{return midmax;} ...
0226-invert-binary-tree.rs 0230-kth-smallest-element-in-a-bst.rs 0235-lowest-common-ancestor-of-a-binary-search-tree.rs 0238-product-of-array-except-self.rs 0239-sliding-window-maximum.rs 0242-valid-anagram.rs 0253-meeting-rooms-ii.rs 0263-ugly-number.rs 0268-missing-number.rs 0271-encode...
LeetCode 513. Find Bottom Left Tree Value Given a binary tree, find the leftmost value in the last row of the tree. 就是拿到最后一层的第一个元素。 这个元素是最左下角的元素,不是最左侧的元素。 如果想实现 其实也很简单 就是维护更新每一层的第一个元素。