数字运算，判断一个数是否接近素数 A Niven number is a number such that the sum of its digits divides itself. For example, 111 is a Niven number because the sum of its digits is 3, which divides 111. We can also specify a number in another base b, and a number in base b is a Niven number if the sum of its digits divides its value. Given b (2 <= b <= 10) and a number in base b, determine whether it is a Niven number or not. Input Each line of input contains the base b, followed by a string of digits representing a positive integer in that base. There are no leading zeroes. The input is terminated by a line consisting of 0 alone. Output For each case, print "yes" on a line if the given number is a Niven number, and "no" otherwise. Sample Input 10 111 2 110 10 123 6 1000 8 2314 0 Sample Output yes yes no yes no
上传时间： 2015-05-21
上传用户：daguda
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
本书介绍Linux环境下的编程方法，内容包括Linux系统命令、 Shell脚本、编程语言(gawk、Perl)、系统内核、安全体系、X Window等，内容丰富、论述全面，涵盖了Linux系统的方方面面。本书附带光盘包括了RedHat Linux系统的最新版本，及安装方法，还包括本书的大量程序代码，极大地方便了读者，为使用和将要使用Linux系统的技术人员提供了较全面的参考。
上传时间： 2015-06-11
上传用户：洛木卓
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
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
利用目前即时通讯工具在互联网上使用的广泛、便利、易用受欢迎的特点，结合了Java语言（Java 2 Standard Edition）的易用特点与性能优势，比如跨平台、安全性、多线程、网络Socket编程、流概念等方面，来设计基于Java虚拟机可跨平台特性的即时通讯工具，并对其体系结构、构成模块及系统关键技术进行了分析与设计。该系统具有安全、高效、实用、支持在不同系统平台运行等特点。 关键词：J2SE、即时通讯、跨平台（一次编写、到处执行）、多线程、JICQ
上传时间： 2016-02-10
上传用户：xwd2010
利用目前即时通讯工具在互联网上使用的广泛、便利、易用受欢迎的特点，结合了Java语言（Java 2 Standard Edition）的易用特点与性能优势，比如跨平台、安全性、多线程、网络Socket编程、流概念等方面，来设计基于Java虚拟机可跨平台特性的即时通讯工具，并对其体系结构、构成模块及系统关键技术进行了分析与设计。该系统具有安全、高效、实用、支持在不同系统平台运行等特点。 关键词：J2SE、即时通讯、跨平台（一次编写、到处执行）、多线程、JICQ
上传时间： 2016-02-10
上传用户：yuzsu
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
道路交通信号控制机GA47－2002.pdf，道路交通信号灯GB14887-2003.pdf，城市道路交通信号控制方式适用规范GAT527-2005.pdf，城市交通信号控制系统术语GAT509-2004.pdf，道路交通信号倒计时显示器GAT508-2004.pdf，公路车辆智能监测记录系统通用技术条件GAT497-2004.pdf，城市道路单向交通组织原则GAT486-2004.pdf，闯红灯自动记录系统通用技术条件GAT496-2004.pdf，LED道路交通诱导可变标志GAT484-2004.pdf，环形线圈车辆检测器JTT455-2001.pdf，机动车测速仪通用技术条件GA297-2001.pdf
上传时间： 2013-12-28
上传用户：牧羊人8920
