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STM8和<b>STm32</b>选型

  • RSA算法 :首先, 找出三个数, p, q, r, 其中 p, q 是两个相异的质数, r 是与 (p-1)(q-1) 互质的数...... p, q, r 这三个数便是 person_key

    RSA算法 :首先, 找出三个数, p, q, r, 其中 p, q 是两个相异的质数, r 是与 (p-1)(q-1) 互质的数...... p, q, r 这三个数便是 person_key,接著, 找出 m, 使得 r^m == 1 mod (p-1)(q-1)..... 这个 m 一定存在, 因为 r 与 (p-1)(q-1) 互质, 用辗转相除法就可以得到了..... 再来, 计算 n = pq....... m, n 这两个数便是 public_key ,编码过程是, 若资料为 a, 将其看成是一个大整数, 假设 a < n.... 如果 a >= n 的话, 就将 a 表成 s 进位 (s

    标签: person_key RSA 算法

    上传时间: 2013-12-14

    上传用户:zhuyibin

  • The government of a small but important country has decided that the alphabet needs to be streamline

    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

  • We have a group of N items (represented by integers from 1 to N), and we know that there is some tot

    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

  • 高性能网吧的三层交换机解决方案 网络接入方式一经确定

    高性能网吧的三层交换机解决方案 网络接入方式一经确定,高性能网吧的实现其实就是局域网的良好网络结构设计和网络设备的选型了。我们的目标是:使网络的速度最快。要实现它,第一个是:网络的结构。我们采用以下三个关键技术。

    标签: 性能 三层交换机 方案 方式

    上传时间: 2014-01-01

    上传用户:asasasas

  • 汉诺塔!!! Simulate the movement of the Towers of Hanoi puzzle Bonus is possible for using animation

    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

  • 将魔王的语言抽象为人类的语言:魔王语言由以下两种规则由人的语言逐步抽象上去的:α-〉β1β2β3…βm ;θδ1δ2…-〉θδnθδn-1…θδ1 设大写字母表示魔王的语言

    将魔王的语言抽象为人类的语言:魔王语言由以下两种规则由人的语言逐步抽象上去的:α-〉β1β2β3…βm ;θδ1δ2…-〉θδnθδn-1…θδ1 设大写字母表示魔王的语言,小写字母表示人的语言B-〉tAdA,A-〉sae,eg:B(ehnxgz)B解释为tsaedsaeezegexenehetsaedsae对应的话是:“天上一只鹅地上一只鹅鹅追鹅赶鹅下鹅蛋鹅恨鹅天上一只鹅地上一只鹅”。(t-天d-地s-上a-一只e-鹅z-追g-赶x-下n-蛋h-恨)

    标签: 语言 抽象 字母

    上传时间: 2013-12-19

    上传用户:aix008

  • 【问题描述】 在一个N*N的点阵中

    【问题描述】 在一个N*N的点阵中,如N=4,你现在站在(1,1),出口在(4,4)。你可以通过上、下、左、右四种移动方法,在迷宫内行走,但是同一个位置不可以访问两次,亦不可以越界。表格最上面的一行加黑数字A[1..4]分别表示迷宫第I列中需要访问并仅可以访问的格子数。右边一行加下划线数字B[1..4]则表示迷宫第I行需要访问并仅可以访问的格子数。如图中带括号红色数字就是一条符合条件的路线。 给定N,A[1..N] B[1..N]。输出一条符合条件的路线,若无解,输出NO ANSWER。(使用U,D,L,R分别表示上、下、左、右。) 2 2 1 2 (4,4) 1 (2,3) (3,3) (4,3) 3 (1,2) (2,2) 2 (1,1) 1 【输入格式】 第一行是数m (n < 6 )。第二行有n个数,表示a[1]..a[n]。第三行有n个数,表示b[1]..b[n]。 【输出格式】 仅有一行。若有解则输出一条可行路线,否则输出“NO ANSWER”。

    标签: 点阵

    上传时间: 2014-06-21

    上传用户:llandlu

  • TCP/IP Socket软件设计

    获取计算机IP地址等网络参数 UDP聊天程序 TCP聊天程序 浏览器的实现

    标签: 获取计算机的名称和IP地址 基本C/S模式的通信实验

    上传时间: 2015-04-12

    上传用户:scnbyh

  • NFS服务器实现文件共享

    NFS服务器实现文件共享

    标签: NFS 嵌入式Linux

    上传时间: 2015-05-13

    上传用户:yangkang1192

  • fft analysis

          Use the fast Fourier transform function fft to analyse following signal. Plot the original signal, and the magnitude of its spectrum linearly and logarithmically. Apply Hamming window to reduce the leakage.   .   The hamming window can be coded in Matlab as   for n=1:N hamming(n)=0.54+0.46*cos((2*n-N+1)*pi/N); end;   where N is the data length in the FFT.

    标签: matlab fft

    上传时间: 2015-11-23

    上传用户:石灰岩123