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Validate Binary Search Tree
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...
分类:其他好文   时间:2014-12-30 21:54:37    阅读次数:183
Convert Sorted Array to Binary Search Tree
Given an array where elements are sorted in ascending order, convert it to a height balanced BST. 将增序数组转换为左右均衡的二叉查找树 根据查找树的性质 左子树所有节点小于根节点值 右边都大于根节点值 子树也遵循此性质 所以只要取出增序数组的中间值作为根节点 再将左右子数组进行递归 代码如下: p...
分类:其他好文   时间:2014-12-30 17:18:32    阅读次数:168
Convert Sorted List to Binary Search Tree
Given a singly linked list where elements are sorted in ascending order, convert it to a height balanced BST. 将增序链表转换为均衡的二叉查找树 与数组转换相同 找到链表的中间结点 作为树的根节点进行赋值  再将链表以中间节点为界 分为左右子链表 进行递归赋值 代码如下: publi...
分类:其他好文   时间:2014-12-30 17:11:39    阅读次数:149
LeetCode:Unique Binary Search Trees II
题目描述: 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...
分类:其他好文   时间:2014-12-30 11:49:09    阅读次数:144
LeetCode Unique Binary Search Trees
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. 1.....
分类:其他好文   时间:2014-12-29 22:57:50    阅读次数:205
LeetCode Convert Sorted Array to Binary Search Tree
Given an array where elements are sorted in ascending order, convert it to a height balanced BST.解题思路:根据递增序列,求平衡二叉查找树,根据平衡二叉查找树的性质,其左右都是二叉查找树,用递归可以比较轻...
分类:其他好文   时间:2014-12-29 22:55:25    阅读次数:297
[LeetCode]109.Convert Sorted List to Binary Search Tree
【题目】 Given a singly linked list where elements are sorted in ascending order, convert it to a height balanced BST. 【分析】 无 【代码】 在下面超时的代码上进行改进:把链表先转换为vector再进行操作。 [LeetCode]108.Convert Sorted Ar...
分类:其他好文   时间:2014-12-29 12:14:29    阅读次数:124
[leetcode]Unique Binary Search Trees II
问题描述: 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 ...
分类:其他好文   时间:2014-12-28 16:57:22    阅读次数:142
Convert Sorted List to Binary Search Tree
Convert Sorted List to Binary Search TreeGiven a singly linked list where elements are sorted in ascending order, convert it to a height balanced BST....
分类:其他好文   时间:2014-12-28 12:50:15    阅读次数:170
[LeetCode]Convert Sorted Array to Binary Search Tree
【题目】 Given an array where elements are sorted in ascending order, convert it to a height balanced BST. 【分析】 二分法,以中间元素i为根节点[start,i-1]递归构建左子树,[i+1,end]递归构建右子树 【代码】 /*****************************...
分类:其他好文   时间:2014-12-28 11:41:50    阅读次数:240
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