时间复杂度O(n) /*** Definition for a binary tree node. * public class TreeNode { * int val; * TreeNode left; * TreeNode right; * TreeNode(int x) { val = x; } * }*/classSolution {publicintlargestBSTSubtree(TreeNode root) {if(root ==null)return0; Integer[] res=dfs(root);...
2. parent向上传递自它以下发现的最大BST 所以我们需要传递subtree size, subtree (min, max)范围,所以我们想到用一个wrapper class包括这三项东西。 同时因为要能分辨上面1、2两种情况,所以size为正表示1,size为负表示2 1/**2* Definition for a binary tree node.3* public class TreeNode {4* int val;5...
/\ \1 8 7The Largest BST Subtree inthiscaseis the highlighted one. Thereturnvalue is the subtree's size, which is 3.Hint: You can recursively use algorithm similar to98. Validate Binary Search Tree at each node of the tree, which will result in O(nlogn) time complexity. Follow up: ...
Given a binary tree, find the largest subtree which is a Binary Search Tree (BST), where largest means subtree with largest number of nodes in it. Note: A subtree must include all of its descendants. ...Leetcode - Largest BST Subtree My code: reference: https://discuss.leetcode.com/...
LeetCode 333. Largest BST Subtree 原题链接在这里:https://leetcode.com/problems/largest-bst-subtree/ 题目: Given a binary tree, find the largest subtree which is a Binary Search Tree (BST), where largest means subtree with largest number of nodes in it....
Kth Smallest Element in a BST 题目描述 给定一个二叉搜索树,编写一个函数 kthSmallest 来查找其中第 k 个最小的元素。 说明: 你可以假设 k 总是有效的,1 ≤ k ≤ 二叉搜索树元素个数。 LeetCode230. Kth Smallest Element in a BST 示例 1: 输入: ......
题目描述 Given a binary search tree, write a function kthSmallest to find the kth smallest element in it. Note: You may assume k is always valid, 1 ≤ k ≤ BST’s total elements. 方法思路 求一组数中的第K个最小... 【leetcode】448. Find All Numbers Disappeared in an Array ...
题目描述 Given a binary search tree, write a function kthSmallest to find the kth smallest element in it. Note: You may assume k is always valid, 1 ≤ k ≤ BST’s total elements. 方法思路 求一组数中的第K个最小... LeetCode—84. Largest Rectangle in Histogram ...
Golang Leetcode 538. Convert BST to Greater Tree.go code遍历递归 版权声明:原创勿转 https://blog.csdn.net/anakinsun/article/details/89211299 anakinsun 2019/04/12 3620 Golang Leetcode 701. Insert into a Binary Search Tree.go code 版权声明:原创勿转 https://blog.csdn.net/anakinsun/article...
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