precalculus mooc

values can cause changes in block 2hash values .... In turn ... (To change all chunks.) ）5. Build Your own BlockchainPart:(i). Implement a chain-type structure(b). Implement a simple HTTP server, externally exposed read-write interfaceSteps:Step1: Creating a block (development environment: Goland)A. Create a project DemochainDemichain/block.goB. Create a block fileC. Creating block structures and functionsStructure:Calculate hash valueGenerate new BlocksFounding blocksStep2: Create BlockchainVi

ordering.3. Merge sortIdea: Divide the whole sequence into multiple sub-sequences, sequence the subsequence sequentially, and finally merge into an ordered sequence, with the following algorithm:/** * Merge sort, time complexity O (NLOGN) * @param arr array to sort * @param the starting position of the lo to sort interval * @param hi to the end of the sort interval */public static void MergeSort ( Int[] arr, int lo, int hi) {//If there is only one element left in the interval, the recursive if

discovers that the X process is waiting for this I/O (at which point X has become blocked), and the handler sets X to Wake_up 6. process Management may set process X to the next process so that the get system invokes the data and returns to the user-state stack 7. from the point of view of the CPU execution instructions: 8. from a memory point of view, all physical addresses are mapped to more than 3G of address space. Because this part is shared for all processes: The experimental

node service (preferred to go to the school folder below.) Input command node Index.js)Show Results:School is also exposed to the outside. The5. The node. JS API usesnode. JS Core module: http/url/querystring module"1". URL URLs parsingVideo: https://www.imooc.com/video/6710URL Document directory: https://nodejs.org/dist/latest-v8.x/docs/api/url.html"2" QueryString parameter Processing tool (serialization/deserialization/escape/reversal semantics)https://www.imooc.com/video/6711//Video addressh

());a_2 = Beishu * R.geta ();b_2 = Beishu * R.GETB ();}return new fraction (a_1 + a_2, b_1);}Public fraction multiply (fraction r) {//multiplies its score and R's fraction to produce a new fraction object.return new Fraction (A_ * (R.geta ()), B_ * (R.GETB ()));}public void print () {//outputs itself as a "numerator/denominator" to the standard output with a carriage return with a newline. If the score is 1/1, you should output 1. When the numerator is greater than the denominator, there is no

Import Java.util.Scanner;public class Report {public static void Main (string[] args) {String[] s={"faint signals, barely perceptible","Very Weak signals","Weak signals","Fair signals","Fairly good signals","Good signals","Moderately strong signals","Strong signals","Extremely strong signals"};String[] r={"unreadable","Barely readable, occasional words distinguishable","Readable with considerable difficulty","Readable with practically no difficulty","Perfectly readable"};String rs= "";int i;Scan

TOP1: Academy Onlinehttp://www.xuetangx.com/TOP2: NetEase Cloud Classroomhttp://study.163.com/Top3:courserahttps://www.coursera.org/Top4:edxhttps://www.edx.org"C Language Program Design" by Zhejiang University: Link: http://pan.baidu.com/s/1o63Hs2e

Definition of supervised learning and unsupervised learning Idea of supervised learning is to teach computer how to do something. Idea of unsupervised learning is to let the computer learn by itself. Reinforcement Learning: Reinforcement Learning

1, MyStringRequired Input: ABC def 123 456 Require output ABC,ABC,ABC def,def,def 123,123,123 456,456,456 #include #include #include using namespace std; Class MyString {char * p; public:mystring (const char * s) {if (s) {p = new Char[strlen (s)

To achieve the QQ new account application and the old account landing simplified version of the function. The biggest challenge is: it is said that the current QQ number has 10 digits. Input format: The input first gives a positive integer nn (\le 10

TOP1: Academy Onlinehttp://www.xuetangx.com/TOP2: NetEase Cloud Classroomhttp://study.163.com/Top3:courserahttps://www.coursera.org/Top4:edxhttps://www.edx.org"C Language Program Design" by Zhejiang University: Link: http://pan.baidu.com/s/1o63Hs2e

Simple integer Partitioning problem total time limit: 100ms memory limit: 65536kB description A positive integer n is represented as a sum of a series of positive integers, n=n1+n2+...+nk, where n1>=n2>=...>=nk>=1, K>=1.This representation of

1. Writing the configuration file 1) Write Data-config-comment.xml, which describes how to query MySQL data and how to import data into an index. Suppose there is a database called MOOC, which has a table called comment, which represents the student's comments which Entity corresponds to a row in the MySQL database table query for SQL queries for full library imports Queryimportquery SQL query corresponding to incremental import

Remedy method See Surf BBS (MOOC Learning Team Report ("Entrepreneurship Innovation Executive" course))The following is reproduced At present, there are XX students did not complete the examination (that is, to complete the corresponding questionnaire, see About the platform, "entrepreneurial Innovation Executive Power" examination methods and examination instructions), learning is to improve, teachers according to the demands of students, designed a

The Riyuerusuo, the good, I am again sentimental. But the days are really too fast, Linux has to be a lesson, I also want to become a senior dog. Digress, pull back, say this semester Linux bring me bitterness bitter spicy, hundred taste mixed (actually also not so hard).The first choice of this course is that Lou teacher really is the big God, feel that follow Lou teacher absolutely can learn things, but Lou teacher with action proved my idea is wrong, because he this semester basically did not

Final review report of "Beihang Academy" projectI. Introduction of TEAM membersSevens team in the M1 and M2 stage are a total of seven players, M1 stage of our team members are: Chen Shaojie, Jinxin, Gao Mengye, Lei Yuanyong, Di, Deng Yame, Chengpelle, M2 in the Deng Yame phase of the transfer of students to Dxteam, Li Cheng students transferred to our team, After two stages we finally completed the project of the Beihang MOOC Mobile client, although

> a,.navbar-default .navbar-nav> .disabled >a:hover,.navbar-default .navbar-nav> .disabled >a:focus { color: #ccc; background-color: transparent;}3. Add title, level-2 menu, and status for the navigation bar1) Add the navigation bar titleIn Web page creation, there is often a title in front of the menu (the text font size is slightly larger than other texts). In fact, the Bootstrap framework also makes this consideration for everyone, it is implemented through "navbar-header" and "navbar-brand.

for students to learn and practice. We plan to use hangdian's OJ platform, and continue to use the csdn blog as an online platform for student assignment sharing to Improve Students' expression and summarization skills. Part 1 introduces the guidance teaching and the "Course Guide" to introduce the "Guided Teaching" Method in the Teaching preparation. Learn the true ideas of Students in "cat/mouse games" (teachers require previewing and homework, while students ignore the requirements. Graduall

Pip install scrapy error, pipscrapy I recently studied Python and reported an error during scrapy installation, as shown in the following figure: Try to find a solution: Download the compiled. whl installation package The procedure is as follows: 1. Download the Twisted package that matches the Python version and system version. url: http://www.lfd.uci.edu /~ Gohlke/pythonlibs/# pip 2. pip install D: \ Twisted-17.9.0-cp35-cp35m-win_amd64.whl (whl package storage path) 3. pip install scrp

Monday,9 months a day This day is the week of the past week summary, I find out what the day.This morning to computer tossing machine, the morning basically did not study, rest a morning.In the afternoon to write a summary last week, finished doing MOOC Reptile class Homework, "Think Python"Archimedes spiral function after class. Arrange this week's course at night.Tuesday,9 month This day did not write a summary. It was written in 9 months , a