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: Panama" is a palindrome.
"race
a c...
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其他好文 时间：
2015-04-01 13:28:54
阅读次数：
112
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：
2015-03-31 12:54:59
阅读次数：
114
题目链接：valid-sudoku
import java.util.Arrays;
/**
*
Determine if a Sudoku is valid, according to: Sudoku Puzzles - The Rules.
The Sudoku board could be partially filled, where empty cells ...
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其他好文 时间：
2015-03-31 12:52:27
阅读次数：
208
Vasya has recently learned at school what a number’s divisor is and decided to determine a string’s divisor. Here is what he came up with.String a is the divisor of string b if and only if there exists...
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其他好文 时间：
2015-03-30 18:51:43
阅读次数：
134
题目：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 differ by more than 1....
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其他好文 时间：
2015-03-30 16:24:02
阅读次数：
129
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：
2015-03-30 13:24:31
阅读次数：
112
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：
2015-03-30 13:20:37
阅读次数：
84
Given a string s and a dictionary of words dict, determine if s can be segmented into a space-separated sequence of one or more dictionary words.For e...
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其他好文 时间：
2015-03-30 12:46:51
阅读次数：
155
1426. Phone List
Constraints
Time Limit: 1 secs, Memory Limit: 64 MB
Description
Given a list of phone numbers, determine if it is consistent in the sense that no number is the pre?x...
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其他好文 时间：
2015-03-30 09:21:57
阅读次数：
182
Valid PalindromeGiven a string, determine if it is a palindrome, considering only alphanumeric characters and ignoring cases.For example,"A man, a pla...
分类：
编程语言 时间：
2015-03-28 20:22:57
阅读次数：
132
