Given an array of integers, every element appears twice except for one. Find that single one.
Note:
Your algorithm should have a linear runtime complexity. Could you implement it without using e...
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其他好文 时间：
2014-06-24 23:30:08
阅读次数：
278
1.Could not find gem 'sqlite3 (>= 0)' in any of the gem sources listed in you
r Gemfile
2.ERROR: While executing gem ... (Gem::FilePermissionError)
You don't have write permissions into the /usr/local/lib/ruby/gems/1.9.1 director.y
3.rails 3遇到 Could n...
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其他好文 时间：
2014-06-24 22:18:45
阅读次数：
316
Copy List with Random Pointer Total Accepted: 12730 Total Submissions: 56262
My Submissions
A linked list is given such that each node contains an additional random pointer which could poi...
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其他好文 时间：
2014-06-24 19:32:26
阅读次数：
194
Given an array of integers, every element appears three times except for one. Find that single one.
Note:
Your algorithm should have a linear runtime complexity. Could you implement it without u...
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其他好文 时间：
2014-06-24 15:52:58
阅读次数：
222
Given an index k, return the
kth row of the Pascal's triangle.
For example, given k = 3,
Return [1,3,3,1].
Note:
Could you optimize your algorithm to use only
O(k) extra space?
...
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其他好文 时间：
2014-06-22 21:31:26
阅读次数：
214
安装的时候首先出现
hfs: summary table not allowed on FS withblock size of 2048
错误，然后就是
hfs: could not initializc summary table forOSX Base System
错误。
一开始也不知道是怎么回事，后来在yandex上搜索中找到一篇帖子，它说这是CPU的问题。Mac OS X 10.9不能识别特有的CPU格式，只能识别一部分。于是呢，按照帖子中的做法，首先找到Virtual Box的位置，用命令符的...
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其他好文 时间：
2014-06-22 18:43:15
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268
在linux下写了一个非常简单的Hello world程序，编译运行竟然报错：Error: Could not find or load main class Hello
最后发现是CLASSPATH的问题。
首先需要检查jdk环境变量是否配置正确：参考这篇文章：ubuntu12.04 安装配置jdk1.7
主要在环境变量这块：
export JAVA_HOME=/usr/java/jdk...
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系统相关 时间：
2014-06-22 08:58:51
阅读次数：
410
题目：
Given a binary tree containing digits from 0-9 only, each root-to-leaf
path could represent a number.
An example is the root-to-leaf path 1->2->3 which represents the number 123.
Find...
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其他好文 时间：
2014-06-22 08:30:24
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236
????用hibernate访问sybase时遇见的异常。
Could not obtain connection metadata : ASE is now using a multi-byte character set, and the TEXT character counts have not been re-calculated using this character set ...
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系统相关 时间：
2014-06-22 06:19:49
阅读次数：
1188
Valid SudokuDetermine if a Sudoku is valid, according to: Sudoku Puzzles - The Rules.The Sudoku board could be partially filled, where empty cells are...
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其他好文 时间：
2014-06-21 16:40:45
阅读次数：
280
