源代码\用动态规划算法计算序列关系个数 用关系"<"和"="将3个数a,b,c依次序排列时,有13种不同的序列关系: a=b=c,a=b<c,a<b=v,a<b<c,a<c<b a=c<b,b<a=c,b<a<c,b<c<a,b=c<a c<a=b,c<a<b,c<b<a 若要将n个数依序列,设计一个动态规划算法,计算出有多少种不同的序列关系, 要求算法只占用O(n),只耗时O(n*n).
上传时间: 2013-12-26
上传用户:siguazgb
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
标签: government streamline important alphabet
上传时间: 2015-06-09
上传用户:weixiao99
基于上述考虑,用Browser/Web模式来设计考试系统比较合适,服务器端我采用Access数据库系统和ASP组件来构成考试的应用服务系统;客户端采用浏览器来完成考试全过程,同时可进行远程系统维护和管理。
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上传时间: 2015-09-08
上传用户:wyc199288
上下文无关文法(Context-Free Grammar, CFG)是一个4元组G=(V, T, S, P),其中,V和T是不相交的有限集,S∈V,P是一组有限的产生式规则集,形如A→α,其中A∈V,且α∈(V∪T)*。V的元素称为非终结符,T的元素称为终结符,S是一个特殊的非终结符,称为文法开始符。 设G=(V, T, S, P)是一个CFG,则G产生的语言是所有可由G产生的字符串组成的集合,即L(G)={x∈T* | Sx}。一个语言L是上下文无关语言(Context-Free Language, CFL),当且仅当存在一个CFG G,使得L=L(G)。 *⇒ 例如,设文法G:S→AB A→aA|a B→bB|b 则L(G)={a^nb^m | n,m>=1} 其中非终结符都是大写字母,开始符都是S,终结符都是小写字母。
标签: Context-Free Grammar CFG
上传时间: 2013-12-10
上传用户:gaojiao1999
近年来,防火墙在网络中得到了广泛的应用。它能够比较有效地防范病毒与黑客的攻击,保护网络的安全。但是也带来了一些不利影响,使一些需要进行网络通信的应用软件系统不能正常工作。本文结合作者的工作,介绍了一个解决方案。并且重点介绍了通过HTTP Tunneling技术使用基于文本的HTTP协议传送二进制数据的方法。
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上传时间: 2015-12-18
上传用户:BOBOniu
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.
标签: represented integers group items
上传时间: 2016-01-17
上传用户:jeffery
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).
标签: converts Toolbox complex logical
上传时间: 2016-02-12
上传用户:a673761058
本课程设计意在通过课程的设计巩固和运用在课程中所学的理论知识和实验技能,基本掌握数C++设计的一般方法进一步提高设计能力和实验技能,为今后开发和应用C++系统打下基础。信息管理系统是对学校学生管理工作进行处理的一个计算机系统。本系统主要包括学生基本信息、学生选课注:为了说明普遍适用信息,此处没有给出某一个具体用户的资料,实际应用时此时将显示用户的各项详细资料,特此说明。信息、学生成绩等的维护、统计查询等功能。系统提供给用户的功能主要分为外部功能和内部功能。外部功能:信息管理系统软件具有录入、输出、查找功能;注:为了说明普遍适用信息,此处没有给出某一个具体用户的资料,实际应用时此时将显示用户的各项详细资料,特此说明。内部功能:该软件集命令、编程、编辑于一体,完成过滤,定位显示。 本次课程设计的任务是设计开发一套新的学生信息管理系统,以便能够提供更为灵活和完善的系统支持。
上传时间: 2016-03-23
上传用户:yiwen213
本课题是针对教务管理的实际需求,开发出一套基于校园网络能满足实际应用要求的学生选课管理应用软件系统的部分代码
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上传时间: 2016-04-17
上传用户:1109003457
U-BOOT-1.3.2移植到44B0X详细过程。内包含补丁和移植过程,可直接应用到系统上面。如果有问题可以直接与我联系。QQ:250008260
上传时间: 2014-01-15
上传用户:ukuk