The government of a small but important country has decided that the alphabet needs to be streamlined and reordered. Uppercase letters will be eliminated. They will issue a royal decree in the form of a String of B and A characters. The first character in the decree specifies whether a must come ( B )Before b in the new alphabet or ( A )After b . The second character determines the relative placement of b and c , etc. So, for example, "BAA" means that a must come Before b , b must come After c , and c must come After d .
Any letters beyond these requirements are to be excluded, so if the decree specifies k comparisons then the new alphabet will contain the first k+1 lowercase letters of the current alphabet.
Create a class Alphabet that contains the method choices that takes the decree as input and returns the number of possible new alphabets that conform to the decree. If more than 1,000,000,000 are possible, return -1.
Definition
本系統以ASP.NET為開發平臺，SQL Server 2000為后臺數據庫，采用B/S模式，運行于校園網絡系統平臺上，用戶及操作人員通過瀏覽器訪問Web服務器，Web服務器再根據客戶機的需要通過ADO.NET訪問數據庫。本系統中Web服務器為IIS5.0，數據庫采用SQL Sever 2000。本系統適用于各大中小學校，其功能主要分為四大類：
用戶管理：用于對用戶的添加及對用戶的刪除及查詢。
成績管理：用于對成績查詢。
幫助信息：用于對本系統的具體操作進行詳解。
本系統性能力求易于使用，具體有較高的擴展性和可維護性。
We have a group of N items (represented by integers from 1 to N), and we know that there is some total order defined for these items. You may assume that no two elements will be equal (for all a, b: a<b or b<a). However, it is expensive to compare two items. Your task is to make a number of comparisons, and then output the sorted order. The cost of determining if a < b is given by the bth integer of element a of costs (space delimited), which is the same as the ath integer of element b. Naturally, you will be judged on the total cost of the comparisons you make before outputting the sorted order. If your order is incorrect, you will receive a 0. Otherwise, your score will be opt/cost, where opt is the best cost anyone has achieved and cost is the total cost of the comparisons you make (so your score for a test case will be between 0 and 1). Your score for the problem will simply be the sum of your scores for the individual test cases.
The XML Toolbox converts MATLAB data types (such as double, char, struct, complex, sparse, logical) of any level of nesting to XML format and vice versa.
For example,
>> project.name = MyProject
>> project.id = 1234
>> project.param.a = 3.1415
>> project.param.b = 42
becomes with str=xml_format(project, off )
"<project>
<name>MyProject</name>
<id>1234</id>
<param>
<a>3.1415</a>
<b>42</b>
</param>
</project>"
On the other hand, if an XML string XStr is given, this can be converted easily to a MATLAB data type or structure V with the command V=xml_parse(XStr).
基于J2EE的物流信息系統的設計與實現
介紹了J2EE 體系結構、Mv c模式等相關概念和技術，并重點探討了
目 前比 較受歡迎的三種開源框架( s t r ut s框架、S Pr i n g框架和H i b e m a t e 框架)。
分析了他們的體系結構、 特點和優缺點。 根據J ZE E的分層結構，結合We b應用
的特點， 將三種框架進行組合設計， 即表現層用S t r ut s框架、 業務邏輯層用S P ri n g
框架、持久層用比b ema t e 框架，從而來構建物流信息系統。這種整合框架使各
層相對獨立， 減少各層之間的禍合程度，同時加快了系統的開發過程，增強了系
統的可維護性和可擴展性，初步達到了分布式物流信息系統的設計目標。
經過以上分析，結合物流系統的業務需求，進行了相關的實現。最后，系統
運用先進的A ja x技術來增強Ui層與服務器的異步通信能力， 使用戶體驗到動態
且響應靈 敏的桌 面級w e b應用程序。 通過江聯公司的試運行結果，系統達到了
渝瞇。 并 且 對 江 聯 公 司 提 出 了 基 于 R F I D 的 解 決 方 案 的 實 施 計 劃 。
