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...
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其他好文 时间：
2015-04-09 23:54:16
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304
Given an array where elements are sorted in ascending order, convert it to a height balanced BST.Hide TagsTreeDepth-first Search方法一：递归，也是dfs/** * Defi...
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其他好文 时间：
2015-04-09 17:08:07
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105
Given a singly linked list where elements are sorted in ascending order, convert it to a height balanced BST.Hide TagsDepth-first SearchLinked List方法一...
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其他好文 时间：
2015-04-09 16:50:31
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144
题目：
Given an array where elements are sorted in ascending order, convert it to a height balanced BST.分析：
将已经排序好的数组转成高度平衡的二叉排序树。
依旧二分法。C++参考代码：/**
* Definition for binary tree
* struct TreeNode {...
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其他好文 时间：
2015-04-09 13:51:49
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112
Implement an iterator over a binary search tree (BST). Your iterator will be initialized with the root node of a BST.Callingnext()will return the next...
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其他好文 时间：
2015-04-09 13:33:52
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106
题目链接：Unique Binary Search Trees II
Given n, generate all structurally unique BST's (binary search trees) that store values 1...n.
For example,
Given n = 3, your program should return all 5 unique B...
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其他好文 时间：
2015-04-09 11:59:05
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171
题目：
Given n, how many structurally unique BST's (binary search trees) that store values 1...n?
For example,
Given n = 3, there are a total of 5 unique BST's.
1 3 3 2 ...
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其他好文 时间：
2015-04-08 18:14:31
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111
题目：
Given n, generate all structurally unique BST's (binary search trees) that store values 1...n.
For example,
Given n = 3, your program should return all 5 unique BST's shown below.
1 ...
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其他好文 时间：
2015-04-08 18:10:34
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132
Givenn, how many structurally uniqueBST's(binary search trees) that store values 1...n?For example,Givenn= 3, there are a total of 5 unique BST's.注意：二...
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其他好文 时间：
2015-04-07 23:01:50
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122
Implement an iterator over a binary search tree (BST). Your iterator will be initialized with the root node of a BST.
Calling next() will return the next smallest number in the BST.
Note: next()...
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其他好文 时间：
2015-04-07 13:55:03
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116
