Binary Tree Zigzag Level Order TraversalGiven a binary tree, return thezigzag level ordertraversal of its nodes' values. (ie, from left to right, then...
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其他好文 时间:
2014-08-08 23:48:36
阅读次数:
307
Encoded Barcodes
Time Limit:3000MS Memory Limit:0KB 64bit IO Format:%lld
& %llu
Submit Status Practice UVALive
5029
Description
All the big malls need a powerful system f...
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其他好文 时间:
2014-08-08 21:25:16
阅读次数:
302
Northwind数据库,选取价格第二高的产品。有两种方法,一个是用Row_Number()函数:SELECT productname FROM (SELECT TOP 2 productname, Row_Number() OVER (ORDER BY unitprice desc) AS...
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数据库 时间:
2014-08-08 21:15:36
阅读次数:
244
oracle 里面经常这样用select col1,col2..., row_number() over (partition by colx order by coly) from table_name;;这句话的意思是把表中的数值按照colx 分组,每一组内部按照coly排序,同时 row_nu...
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数据库 时间:
2014-08-08 20:40:56
阅读次数:
307
Problem Description
Let A be an integral series {A1, A2, . . . , An}.
The zero-order series of A is A itself.
The first-order series of A is {B1, B2, . . . , Bn-1},where Bi = Ai+1 - Ai.
Th...
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编程语言 时间:
2014-08-08 16:12:48
阅读次数:
200
Any class that manages a resource (awrapper, like a smart pointer) needs to implementThe Big Three. While the goals and implementation of the copy-con...
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其他好文 时间:
2014-08-08 15:51:06
阅读次数:
262
一、交叉连接(cross join)交叉连接(cross join):有两种,显式的和隐式的,不带on子句,返回的是两表的乘积,也叫笛卡尔积。例如:下面的语句1和语句2的结果是相同的。 语句1:隐式的交叉连接,没有cross join。select o.id, o.order_number, c.i...
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数据库 时间:
2014-08-08 15:09:16
阅读次数:
374
Description
You have just moved from Waterloo to a big city. The people here speak an incomprehensible dialect of a foreign language. Fortunately, you have a dictionary to help you understand...
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其他好文 时间:
2014-08-08 12:47:45
阅读次数:
296
Problem Description
PM Room defines a sequence A = {A1, A2,..., AN}, each of which is either 0 or 1. In order to beat him, programmer Moor has to construct another sequence B = {B1, B2,... , BN}
of...
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其他好文 时间:
2014-08-07 23:18:54
阅读次数:
308
Yii的Active Recorder包装了很多。特别是把SQL中 把where,order,limit,IN/not IN,like等常用短句都包含进CDbCriteria这个类中去,这样整个代码会比较规范,一目了然。CDbCriteria代表一个标准的查询, 如条件,order by和limit...
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数据库 时间:
2014-08-07 22:59:24
阅读次数:
243