https://leetcode.com/problems/largest-bst-subtree/discuss/78892/12ms-C%2B%2B-solution https://leetcode.com/problems/largest-bst-subtree/discuss/78899/Very-Short-Simple-Java-O(N)-Solution https://leetcode.com/problems/largest-bst-subtree/discuss/78896/Clean-and-easy-to-understand-Java-Solution ...
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...
下面我们来看一种更简洁的写法,对于每一个节点,都来验证其是否是BST,如果是的话,我们就统计节点的个数即可,参见代码如下: 解法二: classSolution {public:intlargestBSTSubtree(TreeNode*root) {if(!root)return0;if(isValid(root, INT_MIN, INT_MAX))returncount(root);returnmax(largestBSTSubtree(root->le...
Leetcode: 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:...
LeetCode "Largest BST Subtree" A typical recursion use: classSolution(object): max_size=0#return: isValid, minVal, maxVal, nodeCntdefgo(self, root):ifroot.leftisNoneandroot.rightisNone:#print (root.val, True, root.val, root.val, 1)self.max_size = max(self.max_size, 1)returnTrue,...
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LeetCode-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:...
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 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....