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BST(Binary Search Tree)
Definition: see wikihttp://en.wikipedia.org/wiki/Binary_search_tree 1 /* 2 This look up is a fast operation because you eliminate the half 3 t...
分类:其他好文   时间:2014-07-22 23:06:34    阅读次数:330
Codeforces Helpful Maths
Xenia the beginner mathematician is a third year student at elementary school. She is now learning the addition operation. The teacher has written down the sum of multiple numbers. Pupils should ca...
分类:其他好文   时间:2014-07-22 23:05:53    阅读次数:382
Error Domain=NSCocoaErrorDomain Code=3840 "The operation couldn’t be completed. (Cocoa error 3840.)"
AF解析json出错: Error Domain=NSCocoaErrorDomain Code=3840 "The operation couldn’t be completed. (Cocoa error 3840.)" (JSON text did not start with array or object and option to allow fragments not set....
分类:其他好文   时间:2014-07-22 23:04:13    阅读次数:400
Timeout expired. The timeout period elapsed prior to completion of the operation or the server is not responding.
今天碰到了一个查询异常问题,上网查了一下,感谢原创和译者如果你使用的数据库连接类是 the Data Access Application Blocks "SqlHelper" 或者 SqlClient Class , 你在执行一个很费时的SQL 操作时候,可能就会碰到下面的超时异常。-------...
分类:其他好文   时间:2014-05-01 21:31:30    阅读次数:395
简单工厂模式
简单工厂模式: 自己的理解:一个类有多种子类,牵涉到要实例化某种子类,用工厂模式来生成对应的实例对象.比如如下的计算器的设计:Operation:操作类的基类 1 class Operation 2 { 3 public: 4 Operation(double lhs,double rhs...
分类:其他好文   时间:2014-05-01 13:17:25    阅读次数:419
POJ 2443 - Set Operation
注意变换思维,然后就是水题。(如果卡时还可以进一步二分优化。)#include long existed[10000][32];int main(void){ int N;// freopen("poj2443.txt", "r", stdin); scanf("%d", &N);...
分类:其他好文   时间:2014-05-01 09:15:47    阅读次数:373
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