有时候在操作Session时，系统会抛出如下异常java.lang.IllegalStateException: Cannot create a session after the response has been committed原因1：Session 的创建语句：HttpSession se...
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编程语言 时间：
2014-07-06 20:38:38
阅读次数：
298
Given an array of words and a lengthL, format the text such that each line has exactlyLcharacters and is fully (left and right) justified.You should p...
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其他好文 时间：
2014-07-06 16:10:10
阅读次数：
138
count组函数：（过滤掉空的字段）select count(address),count(*) from b_usermax（） avg（） min（），sum（）select sum(age),max(age),min(age),avg(nvl(age,0)) from b_user1 260 ...
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数据库 时间：
2014-07-06 12:58:24
阅读次数：
364
题目如下：
Play on Words
Some of the secret doorscontain a very interesting word puzzle. The team of archaeologists has tosolve it to open that doors. Because there is no other way to open the doors,...
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其他好文 时间：
2014-07-06 12:12:36
阅读次数：
221
题目如下：
Problem A: The Monocycle
A monocycle is a cycle that runs on one wheel and the one we will be considering is a bit more special. It has a solid wheel colored with fiv...
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其他好文 时间：
2014-07-06 11:49:47
阅读次数：
233
（一）
public继承是“is-a“的关系，而复合有”has-a“或”根据某物实现出（is-implemented-in-terms-of）“的意思——当复合发生在应用域内的对象之间，表现出has-a关系；当它发生于实现域内则是表示“根据某物实现出”的关系。
应用域部分，相当于你塑造的世界中的某些事物，例如人，汽车等。
后者的对象则是实现细节人工产品(这产品现实世界中是没有的)，像什么...
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编程语言 时间：
2014-07-06 11:47:13
阅读次数：
215
Description
The citizens of Bytetown, AB, could not stand that the candidates in the mayoral election campaign have been placing their electoral posters at all places at their whim. The city counci...
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其他好文 时间：
2014-07-06 10:53:28
阅读次数：
185
Elevator
Time Limit: 1000ms Memory limit: 32768K 有疑问？点这里^_^
题目描述
The highest building in our city has only one elevator. A request list is made up with N positive numbers. The numbers de...
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其他好文 时间：
2014-07-06 10:52:11
阅读次数：
188
Advanced Fruits
Time Limit: 1000MS
Memory Limit: 65536K
Total Submissions: 1944
Accepted: 967
Special Judge
Description
The company "21st Century Fruits" has spec...
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其他好文 时间：
2014-07-06 10:23:04
阅读次数：
166
Patchouli's Spell Cards
Time Limit: 7 Seconds
Memory Limit: 65536 KB
Patchouli Knowledge, the unmoving great library, is a magician who has settled down in the Scarlet Devil Mansion (紅魔館...
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其他好文 时间：
2014-07-04 08:34:34
阅读次数：
347
