http://www.geeksforgeeks.org/find-k-th-smallest-element-in-bst-order-statistics-in-bst/ #include <iostream> #include <vector> #include <algorithm> #include <queue> #include <stack> #include <string> #include <fstream…

struct node { int val; node *left; node *right; node *parent; node() : val(), left(NULL), right(NULL) { } node(int v) : val(v), left(NULL), right(NULL) { } }; node* insert(int n, node *root) { if (root == NULL) { root = new node(n); return root; } if…

A binary search tree is provided for efficiently organizing values for a set of items, even when values are duplicated. In generating the binary search tree, the value of each item in a set of values is determined. If a particular value is unique and…

二叉树(Binary Tree)是最简单的树形数据结构,然而却十分精妙.其衍生出各种算法,以致于占据了数据结构的半壁江山.STL中大名顶顶的关联容器--集合(set).映射(map)便是使用二叉树实现.由于篇幅有限,此处仅作一般介绍(如果想要完全了解二叉树以及其衍生出的各种算法,恐怕要写8~10篇). 1)二叉树(Binary Tree) 顾名思义,就是一个节点分出两个节点,称其为左右子节点:每个子节点又可以分出两个子节点,这样递归分叉,其形状很像一颗倒着的树.二叉树限制了每个节点最多有两个子节…

177. Convert Sorted Array to Binary Search Tree With Minimal Height Given a sorted (increasing order) array, Convert it to create a binary tree with minimal height. Example Example 1: Input: {1,2} Output: A binary search tree with minimal height. Exp…

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…

二叉查找树基础 二叉查找树(BST)满足这样的性质,或是一颗空树:或左子树节点值小于根节点值.右子树节点值大于根节点值,左右子树也分别满足这个性质. 利用这个性质,可以迭代(iterative)或递归(recursive)地用O(lgN)的时间复杂度在二叉查找树中进行值查找. 相关LeetCode题: 700. Search in a Binary Search Tree  题解 701. Insert into a Binary Search Tree  题解 450. Delete Node…

1. 二叉搜索树,可以用作字典,或者优先队列. 2. 根节点 root 是树结构里面唯一一个其父节点为空的节点. 3. 二叉树搜索树的属性: 假设 x 是二叉搜索树的一个节点.如果 y 是 x 左子树里面的一个节点,则 y.key <= x.key.如果 y 是 x 右子树里面的一个节点,则 x.key <= y.key. 4. 通过一次中序遍历 ( inorder tree walk ),可以将二叉搜索树的元素按照排好的顺序输出.例子如下 INORDER-TREE-WALK(x) if x…

Given a non-empty binary search tree and a target value, find k values in the BST that are closest to the target. Note: Given target value is a floating point. You may assume k is always valid, that is: k ≤ total nodes. You are guaranteed to have onl…

1.二叉搜索树:去一个陌生的城市问路到目的地: for each node, all elements in its left subtree are less-or-equal to the node (<=), and all the elements in its right subtree are greater than the node (>). 给予一个已经排序好的整数数组, 生成一个相对合理的二叉搜索树.(?相对合理的?) 给予一个二叉树的根节点,验证该树是否是二叉树搜索树,(…