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zoj1094
zoj094
Matrix multiplication problem is a typical example of dynamical programming.
Suppose you have to evaluate an expression like A*B*C*D*E where A,B,C,D and E are matrices. Since matrix multiplication is associative, the order in which multiplications are performed is arbitrary. However, the number of elementary multiplications needed strongly depends on the evaluation order you choose.
For example, let A be a 50*10 matrix, B a 10*20 matrix and C a 20*5 matrix.
There are two different strategies to compute A*B*C, namely (A*B)*C and A*(B*C).
The first one takes 15000 elementary multiplications, but the second one only 3500.
Your job is to write a program that determines the number of elementary multiplications needed for a given evaluation strategy.
(Matrix multiplication problem is a typical example of dynamical programming.
Suppose you have to evaluate an expression like A*B*C*D*E where A,B,C,D and E are matrices. Since matrix multiplication is associative, the order in which multiplications are performed is arbitrary. However, the number of elementary multiplications needed strongly depends on the evaluation order you choose.
For example, let A be a 50*10 matrix, B a 10*20 matrix and C a 20*5 matrix.
There are two different strategies to compute A*B*C, namely (A*B)*C and A*(B*C).
The first one takes 15000 elementary multiplications, but the second one only 3500.
Your job is to write a program that determines the number of elementary multiplications needed for a given evaluation strategy.
)
- 2012-06-10 10:38:53下载
- 积分：1
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47758745
双色球随机选号易语言源码，应用程序编程源码，很好的参考资料。(Shuang Seqiu randomly selected, easy language source code, application programming source code, a good reference.)
- 2013-11-05 15:47:49下载
- 积分：1
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一个BT的源代码，用c++编写的，是别人的，我就是想下载一个有用的代码，谢谢站长。...
一个BT的源代码，用c++编写的，是别人的，我就是想下载一个有用的代码，谢谢站长。-A BT source code, using c++ Prepared, is someone else
- 2023-02-08 19:25:04下载
- 积分：1
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使用JAVA I/O和 NI/O编写的两种网络ECHO服务器，用以学习两种IO的不同编程方法，体验基于阻塞与非阻塞IO开发高性能网络应用程序的具体实例.Java...
使用JAVA I/O和 NI/O编写的两种网络ECHO服务器，用以学习两种IO的不同编程方法，体验基于阻塞与非阻塞IO开发高性能网络应用程序的具体实例.Java平台传统的I/0系统基于byte(字节)和Stream(数据流)。这种模式下的I/O 操作以字节为单位,以流的方式处理数据。而NIO( New I/O )以块的方式处理数据，它的系统操作面向Buffer(缓冲),Channel(通道)和Selector(选择器)，不再是字节，这种模式利用了操作系统管理内存和文件的方式，并将一些耗时操作直接转移给操作系统，使JavaI/O的速度得以提高、性能得到了明显的改善
-The use of JAVA I/O and NI/O, prepared by two types of network servers ECHO to learn two different programming methods IO experience obstructive and non-blocking IO based on the development of high-performance network applications specific examples. Java platform for the traditional I/0 system is based on the byte (byte) and Stream (data streams). This mode of I/O operation in bytes in order to deal with data flow way. The NIO (New I/O) blocks the way to deal with data, its system for Buffer (buffer), Channel (channel) and the Selector (selector), is no longer a byte, this mode of use of operating system management of memory and the manner in which documents, and some time-consuming operation of a direc
- 2022-02-09 15:18:54下载
- 积分：1
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本代码实现了不重新启动机器使IP设置生效
本代码实现了不重新启动机器使IP设置生效- This code realized restarted the machine to cause IP not to
establish becomes effective
- 2022-11-27 14:35:03下载
- 积分：1
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bxpc
V3更新重写了整个心理咨询系统，吸取了历史版本的诸多有点，然后在增加了一些本人认为一个心理网站所需要的扩展功能，做到了非常人性化的局面，也许系统里面还存在部分JAVASCRIPT的错误，这是因为我没有增加容错脚本，其实没什么大关系的！好了现在谈谈重点的有哪些功能增加了吧：
1、个人拥有一个控制面板（基本资料，密码，头像，备忘录），虽然功能比较简单，但作为一个心理平台的话已经够了
2、心理讨论，系统的主体，比历史版本的平台功能强化了一下，具体功能如何内见，保证会让你满意
3、放松一刻：辅助模块，用于轻松心理咨询者抱着比较紧张的心情来浏览得到舒心的功能，有音乐试听互动的功能
4、系统功能，本系统是结合了历史版本的有点的，所以历史版本还存在免验证和验证的分别2套系统，而本系统则只要点点其中的参数设置即可设定成功，而且用户验证数据还可以通过EXCEL表格自由导入，方便异常
5、管理员登录名：admin
密 码 ：admin
应网友要求，特别改制了ACCESS数据库版，可能数据库移植还有点问题，希望大家到官方网站去讨论交流(V3 updated rewrite of the entire system psychological counseling, to learn the history of the many versions somewhat, Then some of the extra that I have a psychological need for the expansion, and ensure that the very humanity of the situation, Perhaps system still exist inside the part JAVASCRIPT wrong, it is because I have no script to increase fault tolerance, In fact, nothing related to the! Well now turn to focus on what are the functions of the increase it : an individual with a control panel (basic information, passwords, Head MOU), although relatively simple functions, but as a platform for the psychological enough for the two, psychological discussion, The main system than the historical version of the platform to strengthen the function of that specific functions within see how t)
- 2007-07-03 00:17:42下载
- 积分：1
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VBforWord
说明： 是关于vb控制word的文章，介绍了如何操作word稳当，建立word稳当等.(歉 vbword 拢 尾word 鹊 word 鹊.)
- 2008-08-29 13:23:49下载
- 积分：1
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P2P之UDP穿透NAT的原理与实现源代码，有VC实现的网络编程
P2P之UDP穿透NAT的原理与实现源代码，有VC实现的网络编程-P2P UDP penetrate NAT Zhi Theory and implementation of the source code, the VC Network Programming
- 2022-11-09 11:30:03下载
- 积分：1
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cxht-promotionLove-web
微信愚人节活动:登录注册发送表白信息,所有信息入库,包括发送者的openId unionid 等,并且统计数量.(WeChat Fool s Day activities: Sign up to send express messages, all information into the library, including the sender s openId unionid, and statistics.)
- 2020-10-19 21:37:25下载
- 积分：1
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2gaiph0
说明： 将邻接矩阵转移到gaiph可识别的矩阵，从而可以将邻接矩阵可视化，并可以通过gaiph软件美化(Transfer the adjacency matrix to the gaiph-recognizable matrix)
- 2019-11-25 21:40:21下载
- 积分：1
