二叉搜索树的第k大的节点
题目给定一颗二叉搜索树,请找出其中的第k大的结点。思路如果中序遍历一棵二叉搜索树,遍历序列的数值则是递增排序,因此只需中序遍历一个二叉搜索树即可。中序遍历用递归实现比较容易,但要想清楚的是遍历到一个根结点的时候要做的是什么?中序遍历二叉树打印的时候我们在递归完左子树之后打印根结点,本题目要求的当然不...
LeetCode OJ:Validate Binary Search Tree(合法的二叉搜索树)
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 n...
L2-004 这是二叉搜索树吗? (25 分) (树)
链接:https://pintia.cn/problem-sets/994805046380707840/problems/994805070971912192题目:一棵二叉搜索树可被递归地定义为具有下列性质的二叉树:对于任一结点,其左子树中所有结点的键值小于该结点的键值;其右子树中所有结点的键值大...
javascript数据结构——写一个二叉搜索树
二叉搜索树就是左侧子节点值比根节点值小,右侧子节点值比根节点值大的二叉树。照着书敲了一遍。function BinarySearchTree(){ var Node = function(key){ this.key = key this.left = null ...
HDU3791二叉搜索树(二叉树)
Problem Description判断两序列是否为同一二叉搜索树序列Input开始一个数n,(1<=n<=20) 表示有n个需要判断,n= 0 的时候输入结束。接下去一行是一个序列,序列长度小于10,包含(0~9)的数字,没有重复数字,根据这个序列可以构造出一颗二叉搜索树。接下去的n...
《剑指offer》二叉搜索树的后序遍历序列
本题来自《剑指offer》 二叉搜索树的后序遍历序列题目:输入一个整数数组,判断该数组是不是某二叉搜索树的后序遍历的结果。如果是则输出Yes,否则输出No。假设输入的数组的任意两个数字都互不相同。思路:对二叉搜索树有个明确的概率,即左节点小于根节点,右节点大于根节点。后序遍历是左友根遍历。首先找到根...
LeetCode 235. Lowest Common Ancestor of a Binary Search Tree (二叉搜索树最近的共同祖先)
Given a binary search tree (BST), find the lowest common ancestor (LCA) of two given nodes in the BST.According to the definition of LCA on Wikipedia:...
[LeetCode] 235. Lowest Common Ancestor of a Binary Search Tree 二叉搜索树的最小共同父节点
Given a binary search tree (BST), find the lowest common ancestor (LCA) of two given nodes in the BST.According to the definition of LCA on Wikipedia:...
[LeetCode] 235. Lowest Common Ancestor of a Binary Search Tree 二叉搜索树的最近公共祖先
Given a binary search tree (BST), find the lowest common ancestor (LCA) of two given nodes in the BST.According to the definition of LCA on Wikipedia:...
【1】【leetcode-99】 恢复二叉搜索树
(没思路)99. 恢复二叉搜索树二叉搜索树中的两个节点被错误地交换。请在不改变其结构的情况下,恢复这棵树。示例 1:输入: [1,3,null,null,2] 1 / 3 \ 2输出: [3,1,null,null,2] 3 / 1 \ 2示例 2:输入: [3,1,4,nu...
[LeetCode] Unique Binary Search Trees 独一无二的二叉搜索树
Given n, how many structurally unique BST's (binary search trees) that store values 1 ... n?Example:Input: 3Output: 5Explanation:Given n = 3, there ar...
[LeetCode] 285. Inorder Successor in BST 二叉搜索树中的中序后继节点
Given a binary search tree and a node in it, find the in-order successor of that node in the BST.The successor of a node p is the node with the smalle...
[LeetCode] Kth Smallest Element in a BST 二叉搜索树中的第K小的元素
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 ...
LeetCode 230 Kth Smallest Element in a BST 二叉搜索树中的第K个元素
1、非递归解法 /** * Definition for a binary tree node. * struct TreeNode { * int val; * TreeNode *left; * TreeNode *right; * TreeNode(...
[LeetCode] 230. Kth Smallest Element in a BST 二叉搜索树中的第K小的元素
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 ...
230 Kth Smallest Element in a BST 二叉搜索树中第K小的元素
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。注意:你可以假设k总是有效的,1≤ k ≤二叉搜索树元素个数。进阶:如果经常修改二叉搜索树(插入/删除操作)并且你需要频繁地找到第k小值呢? 你将如何优化kthSmallest函数?详见:https://leetcod...
自平衡二叉(查找树/搜索树/排序树) binary search tree
在计算机科学中,AVL树是最先发明的自平衡二叉查找树。AVL树得名于它的发明者 G.M. Adelson-Velsky 和 E.M. Landis,他们在 1962 年的论文 "An algorithm for the organization of information" 中发表了它。一、AVL...
[LeetCode] Recover Binary Search Tree 复原二叉搜索树
Two elements of a binary search tree (BST) are swapped by mistake.Recover the tree without changing its structure.Example 1:Input: [1,3,null,null,2] ...
[LeetCode] Convert Sorted List to Binary Search Tree 将有序链表转为二叉搜索树
Given a singly linked list where elements are sorted in ascending order, convert it to a height balanced BST.For this problem, a height-balanced binar...
[LeetCode] Validate Binary Search Tree 验证二叉搜索树
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 n...