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
java 实现的P2P Chord算法。chord算法是结构式的P2P搜索与管理协议,比非结构式算法简单高效,比较适合实时多媒体传输的系统结构。
上传时间: 2014-09-06
上传用户:qwe1234
C51实例代码:FLASH驱动,IIC,usart,触摸液晶控制显示,电热壶烧水程序,定点滤波,定时器及计数器的生成,二分法查表,浮点滤波,浮点滤波,控制SED1335的液晶显示,软件看门狗,十六进制_BCD码相互转换,时间倒计时,实时时钟,数字时钟,温度芯片驱动,无线数据传输,以太网芯片
上传时间: 2015-09-05
上传用户:hjshhyy
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
并行AVS实时编解码器设计与实现 介绍了一种并行AVS实时编码器的设计,它包括音视频数据输入、音视频编码、传输流系统复用器、输出和控制部分,其 中重点介绍了视频编码器和传输流系统复用器的设计和实现。实验结果证明,实现标清AVS实时编码器是可行的。
上传时间: 2015-11-27
上传用户:qweqweqwe
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
采样高压电流,计量安培小时数通过无线定时传输,支持无线校时、密码设置等功能,可扩展成zigbee组网
上传时间: 2014-09-02
上传用户:2525775
:gprs终端,VB、控件、协议,WINSOCKET控件,Winsock控件,gprs,cdma,gprs编程,gprs模块,gprs终端,gprs modem,gprs无线,modem,终端,gprs设备,cdma模块,cdma终端,cdma modem,产品,无线,无线数据传输,数据传输,编程,gprs数据编程,tcp,ip,udp, Winsock dll, Winsock ocx控件,Winsock ocx, Winsock函数, Winsock编程,WINSOCKET,Sockets,Socket,tcp协议,ip协议,ppp,ppp协议,udp协议,下载,示例,编程示例,示例代码,源代码。单片机,mc51,mc51单片机,430,plc,组态软件,组态王,8051,89c52等。无线传输,无线上网,gprs无线上网,终端。Internet,网络,网络编程。网络设计,gprs组网方式,gprs,tcp/ip包,tcp/ip数据包,tcp/ip数据包格式,报文格式,
标签: gprs
上传时间: 2013-12-08
上传用户:ecooo
NOKIA手机的测试模式(BTS TEST),通常又称工程模式,有比普通专业测试手机更强的测试功能,它包含了大量的无线参数、GSM系统信息以及数十项手机内部测试功能的显示,比如SIM卡的详细信息、电池的电压、放电电流、温度以及详尽的充电情况。手机的测试模式对于资金不够充裕的区县移动公司的无线基站维护测试工程师、优化工程师来说,可以在不增加任何投入的情况下,使维护人员能够在任意时刻了解所在基站的情况,对提高维护水平、加强维护力量大有好处。对手机维修人员和一般的无线电爱好者都有一定的参考价值。下面将结合GSM网络的基础知识,从实际应用的角度来介绍NOKIA手机测试模式各项显示的专业解释。
上传时间: 2016-10-20
上传用户:sardinescn
汉诺塔!!! Simulate the movement of the Towers of Hanoi puzzle Bonus is possible for using animation eg. if n = 2 A→B A→C B→C if n = 3 A→C A→B C→B A→C B→A B→C A→C
标签: the animation Simulate movement
上传时间: 2017-02-11
上传用户:waizhang