题目地址:https://leetcode-cn.com/problems/largest-bst-subtree/题目描述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 333. Largest BST Subtree 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. Follow up: Can you figure out ways to solve it with...
Leetcode - Largest BST Subtree My code: reference: https://discuss.leetcode.com/topic/36995/share-my-o-n-java-code-with-brief-explanation-and-comments 这道题目并没能自己写出来。。。 类似的想法是有的。就是从底到顶,backtracking 当时我怎么想的呢?然后放弃了。 我想的是返回一个二维数组,第一...
refer to https://discuss.leetcode.com/topic/36995/share-my-o-n-java-code-with-brief-explanation-and-comments/2 这道题不好从root到leaf一层一层限制subtree取值范围,因为有可能parent并不能构成BST,反倒是需要如果subtree是BST的话,限制parent的取值范围,然后根据情况判断是: 1. 吸纳parent以及parent的另一...
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. Note: A subtree must include all of its descendants. ...
333. Largest BST Subtree public class Solution { public int largestBSTSubtree(TreeNode root) { if(root == null) return 0; int[] res = recursive(root); return res[2]; } public int[] recursive(TreeNode root){ int[] res = new int[5];...
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My Solutions to Leetcode problems. All solutions support C++ language, some support Java and Python. Multiple solutions will be given by most problems. Enjoy:) 我的Leetcode解答。所有的问题都支持C++语言,一部分问题支持Java语言。近乎所有问题都会提供多个算
333. Largest BST Subtree 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. Here's an example:...
The Largest BST Subtree in this case is the highlighted one. The return value is the subtree's size, which is 3. 一刷 题解: 如果root比左孩子要大是不够的,还要比左孩子的subtree的最小值要大。于是考虑创建一个object来保存。 /**