作者: 负雪明烛 id: fuxuemingzhu 个人博客: http://fuxuemingzhu.cn/ 目录 题目描述 题目大意 解题方法 重建二叉树 数组保存节点 中序遍历时修改指针 参考资料 日期 题目地址:https://leetcode.com/problems/increasing-order-search-tree/description/ 题目描述 Given a tree, rearrange the tree in in-order so that the leftmo…

题目如下: 解题思路:我的方法是先用递归的方法找出最左边的节点,接下来再对树做一次递归中序遍历,找到最左边节点后将其设为root,其余节点依次插入即可. 代码如下: # Definition for a binary tree node. # class TreeNode(object): # def __init__(self, x): # self.val = x # self.left = None # self.right = None class Solution(object): n…

problem 897. Increasing Order Search Tree 参考 1. Leetcode_easy_897. Increasing Order Search Tree; 完…

[LeetCode]99. Recover Binary Search Tree 解题报告(Python) 标签(空格分隔): LeetCode 题目地址:https://leetcode.com/problems/recover-binary-search-tree/description/ 题目描述: Two elements of a binary search tree (BST) are swapped by mistake. Recover the tree without chan…

题目来源: https://leetcode.com/problems/increasing-order-search-tree/ 自我感觉难度/真实难度:medium/easy 题意: 分析: 自己的代码: 优秀代码: # Definition for a binary tree node. # class TreeNode: # def __init__(self, x): # self.val = x # self.left = None # self.right = None class…

Given a tree, rearrange the tree in in-order so that the leftmost node in the tree is now the root of the tree, and every node has no left child and only 1 right child. Example 1: Input: [5,3,6,2,4,null,8,1,null,null,null,7,9] 5 / \ 3 6 / \ \ 2 4 8  …

Two elements of a binary search tree (BST) are swapped by mistake. Recover the tree without changing its structure. 来源:力扣(LeetCode)链接:https://leetcode-cn.com/problems/recover-binary-search-tree著作权归领扣网络所有.商业转载请联系官方授权,非商业转载请注明出处. [题意分析] 对于一个BST应该了解的一个重…

作者: 负雪明烛 id: fuxuemingzhu 个人博客: http://fuxuemingzhu.cn/ 目录 题目描述 题目大意 解题方法 递归 日期 题目地址:https://leetcode.com/problems/construct-binary-search-tree-from-preorder-traversal/ 题目描述 Return the root node of a binary search tree that matches the given preorder…

作者: 负雪明烛 id: fuxuemingzhu 个人博客: http://fuxuemingzhu.cn/ 目录 题目描述 题目大意 解题方法 递归 BST的中序遍历是有序的 日期 题目地址:https://leetcode.com/problems/validate-binary-search-tree/#/description 题目描述 Given a binary tree, determine if it is a valid binary search tree (BST). A…

题目: Given a binary tree, determine if it is a valid binary search tree (BST). Assume a BST is defined as follows: The left subtree of a node contains only nodes with keys less than the node's key. The right subtree of a node contains only nodes with…