题目：Given a string, determine if it is a palindrome, considering only alphanumeric characters and ignoring cases.For example,"A man, a plan, a canal: P...
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其他好文 时间：
2014-07-09 21:38:15
阅读次数：
207
题目：Given a string containing just the characters'(',')','{','}','['and']', determine if the input string is valid.The brackets must close in the corre...
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其他好文 时间：
2014-07-09 21:12:58
阅读次数：
221
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：
2014-07-09 00:53:55
阅读次数：
277
Given a string, determine if it is a palindrome, considering only alphanumeric characters and ignoring cases.For example,"A man, a plan, a canal: Pana...
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其他好文 时间：
2014-07-06 16:45:00
阅读次数：
201
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：
2014-07-06 16:06:45
阅读次数：
198
A message containing letters from A-Z is being encoded to numbers using the following mapping:
'A' -> 1
'B' -> 2
...
'Z' -> 26
Given an encoded message containing digits, determine the total numb...
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其他好文 时间：
2014-07-05 23:41:41
阅读次数：
253
Given a string, determine if it is a palindrome, considering only alphanumeric characters and ignoring cases.For example,"A man, a plan, a canal: Pana...
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其他好文 时间：
2014-07-03 19:38:58
阅读次数：
287
Given a binary tree, determine if it is a valid binary search tree (BST).
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其他好文 时间：
2014-07-03 19:36:49
阅读次数：
196
Given a binary tree, determine if it is height-balanced.
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其他好文 时间：
2014-07-03 19:00:17
阅读次数：
188
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.
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其他好文 时间：
2014-07-03 13:02:23
阅读次数：
200
