What is Binary Search Tree (BST) A binary tree in which for each node, value of all the nodes in left subtree is less or equal and value of all the nodes in right subtree is greater The idea: We can use set boundry for each node. We take C tree for e…

The solution for the problem can be divided into three cases: case 1: if the delete node is leaf node, then we can simply remove it case 2: if the delete node is has single side or substree case 3: it has two children, then to keep it as a valid bina…

For the given tree, in order traverse is: visit left side root visit right side // 6,8,10,11,12,15,16,17,20,25,27 The successor is the one right next to the target: // target 8 --> succossor is 10 So, given the tree and target node, to find its succe…

问题叙述性说明: 1.binary search tree它是一种二进制树的.对于key值.比当前节点左孩子少大于右子. 2.binary search tree不是自平衡树.所以,当插入数据不是非常随机时候,性能会接近O(N).N是树中节点数目; 3.理想状态下.时间复杂度是O(lgN), N是树中节点的数目: 4.以下给出一个简单的实现,并比較其和STL map的性能.一样的操作,大约耗时为STL map 的2/3. 代码例如以下: #ifndef _BINARY_SEARCH_TREE_H…

Sept. 22, 2015 学一道算法题, 经常回顾一下. 第二次重温, 决定增加一些图片, 帮助自己记忆. 在网上找他人的资料, 不如自己动手. 把从底向上树的算法搞通俗一些. 先做一个例子: 9/22/2015 Go over one example to build some muscle memory about this bottom up, O(1) solution to find the root node in subtree function. Sorted List: 1…

Given a singly linked list where elements are sorted in ascending order, convert it to a height balanced BST. Top down 的解题方法: 1. 将LinkedList的值保存到一个数组中,转化成Convert Sorted Array to Binary Search Tree 来解决 时间复杂度为O(n), 空间复杂度为O(n) /** * Definition for singl…

1064. Complete Binary Search Tree (30) 时间限制 100 ms 内存限制 32000 kB 代码长度限制 16000 B 判题程序 Standard 作者 CHEN, Yue A Binary Search Tree (BST) is recursively defined as a binary tree which has the following properties: The left subtree of a node contains only…

Problem Link: http://oj.leetcode.com/problems/convert-sorted-list-to-binary-search-tree/ We design a auxilar function that convert a linked list to a node with following properties: The node is the mid-node of the linked list. The node's left child i…

4.3 Given a sorted (increasing order) array with unique integer elements, write an algorithm to create a binary search tree with minimal height. 这道题给了我们一个有序的数组,让我们来生成一个最小高度的二叉搜索树,为了达到最小高度,肯定是尽可能的填成一个满二叉树,左子树填满,右子树尽可能的填满.而且要注意是二叉搜索树,左<根<右的性质不能忘.既然给了我…

4.5 Implement a function to check if a binary tree is a binary search tree. LeetCode上的原题,请参见我之前的博客Validate Binary Search Tree 验证二叉搜索树.…