Given a string containing just the characters'(',')','{','}','['and']', determine if the input string is valid.The brackets must close in the correct ...
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其他好文 时间：
2015-01-16 15:59:49
阅读次数：
183
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 ke...
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编程语言 时间：
2015-01-16 10:12:49
阅读次数：
163
Given a stringsand a dictionary of wordsdict, determine ifscan be segmented into a space-separated sequence of one or more dictionary words.For exampl...
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其他好文 时间：
2015-01-15 23:33:14
阅读次数：
151
Given a linked list, determine if it has a cycle in it.
Follow up:
Can you solve it without using extra space?
/**
* Definition for singly-linked list.
* struct ListNode {
* int val;
* ...
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其他好文 时间：
2015-01-15 11:01:23
阅读次数：
186
Given a string, determine if it is a palindrome, considering only alphanumeric characters and ignoring cases.
For example,
"A man, a plan, a canal: Panama" is a palindrome.
"race a car" is not a ...
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其他好文 时间：
2015-01-15 09:26:10
阅读次数：
160
问题描述：
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'...
分类：
其他好文 时间：
2015-01-14 22:53:40
阅读次数：
179
Given a string containing just the characters'(',')','{','}','['and']', determine if the input string is valid.The brackets must close in the correct ...
分类：
其他好文 时间：
2015-01-14 22:44:53
阅读次数：
189
Given a binary tree and a sum, determine if the tree has a root-to-leaf path such that adding up all the values along the path equals the given sum.
For example:
Given the below binary tree and sum
...
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其他好文 时间：
2015-01-14 16:58:45
阅读次数：
167
Given a binary tree, determine if it is height-balanced.
For this problem, a height-balanced binary tree is defined as a binary tree in which the depth of the two subtrees of every node never diffe...
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其他好文 时间：
2015-01-14 15:33:12
阅读次数：
141
Given a string containing just the characters '(', ')', '{', '}', '[' and ']', determine if the input string is valid.
The brackets must close in the correct order, "()" and "()[]{}" are all valid...
分类：
其他好文 时间：
2015-01-14 14:23:11
阅读次数：
148
