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HDU ACM 1269 Maze Castle--forward strong connected components (Tarjan algorithm practice)

Analysis: To determine whether a graph is a strongly connected component, which is solved using the Tarjan algorithm.#include HDU ACM 1269 Maze Castle--forward strong connected components (Tarjan algorithm practice)

C + + uses pointer arrays and two-dimensional arrays to generate two-dimensional space, storing data and releasing it. Practice New/delete, new[]/delete[]

Two-dimensional space is generated by pointer array and two-dimensional array, and data is stored and released. For example, the data is as follows:Use the next fgetc ()1#include 2#include 3 using namespacestd;4 5 6 intMain ()7 {8 #if0//generating two-dimensional array storage9file* fp = fopen ("G:\\qtcode\\temp.txt","R");Ten One //char buf[3][10] ={0}; A Char(*BUF) [Ten] =New Char[3][Ten]; - - intI,j,ch; the for(i =0;i3; i++) - { - for(j =0;j8; j + +) - {

Deepid Algorithm Practice

% 84.19% 70.66% Deepid 97.27% 89.22% 76.64% Precision means that if the same category of people appear in the top-n results, the query will fail if it succeeds. And the AP means, in the top-n results need to count and query the image of the same category of pictures, and then divided by N, is the accuracy of this query, and then the average.It can be seen from the results that, in the same dimension, Deepid is stronger than PCA in the expression

The practice of serialization and deserialization of Java objects

different serialversionuid and possibly the same. To improve the independence and certainty of serialversionuid, it is strongly recommended that the definition serialversionuid be displayed in a serializable class, giving it a definite value. There are two ways to explicitly define SERIALVERSIONUID:1) In some cases, you want the different versions of the class to be serializable compatible, so you need to ensure that the different versions of the class have the same serialversionuid;2) In some

Java Instance Practice

1. Do not use intermediate variables to exchange two numbers Public classExchange { Public Static voidMain (string[] args) {Scanner Scanner=NewScanner (system.in); System.out.println ("Please enter an integer:"); Long NUM1=Scanner.nextlong (); System.out.println ("Please enter an integer:"); Long num2=Scanner.nextlong (); System.out.println ("Num1 before Exchange:" +num1+ "before num2:" +num2); NUM1= num1^num2; Num2= num2^NUM1; NUM1= num1^num2; System.out.println ("Num1 after Exchange:" +num1+ "

Day26-javascript the practice of acquiring and modifying CSS styles

if (arguments.length==2) { return obj.style[name]; Gets the style }else {= value; Modify Style } }Non-inline style: Obj.style. Attribute mode does not apply to non-inline styles"Good for a few things"Compatibility issues need to be considered when getting non-inline styles with currentstyle () and getComputedStyle (), and browser compatibility issues are generally through if. else conditional statement implementation.Curre

Pythonl Practice Note--python threading the Gil

Global interpreter lock in Python thread Gil (Global interpreter Lock)Python--> supports multithreading--sync and mutex--locking--interpreter lock--interpreter can only interpret one thread at a timeIn the CPython interpreter, multiple threads that are opened under the same process can only have one thread at a time and cannot take advantage of multicore advantagesThe Gil is not a Python feature, it is a concept introduced when implementing the Python Interpreter (CPython), and Python is complet

"Reprint" Python Crawler Practice Simulation Login

) Sys.setdefaultencoding ("UTF8") ##################################################### #登录人人 loginurl = ' http://www.renren.com/PLogin.do ' Logindomain = ' renren.com ' Class Login (object): def __init__ (self): self.name = ' ' SELF.PASSWPRD = ' ' self.domain = ' ' SELF.CJ = Cookielib. Lwpcookiejar () Self.opener = Urllib2.build_opener (urllib2. Httpcookieprocessor (self.cj)) Urllib2.install_opener (self.opener) def setlogininfo (self,username,passwo

The 14th week on the Machine practice project of the two-dimensional array (5)

Questions and codes/* Copyright (c) 2014, Yantai University School of Computer * All rights reserved. * File name: Test.cpp * Author: Simbin * Completion Date: November 27, 2014 * Version number: v1.0 * * Problem Description: An element that outputs a multiple of the subscript and 3. * Input Description: The latter two column elements. * Program output: The sum of the subscript is a multiple of 3 elements; */#include Operation Result:The 14th week on the Machine

Java Practice Questions: now give two strings, compare them to see if they are equal

Import Java.io.BufferedReader;Import java.io.IOException;Import Java.io.InputStreamReader;Import Java.util.StringTokenizer;/*** Suppose the strings are similar to the ABA and AAB are equal, now give you the two sets of strings, please programmatically compare them to see if they are equal* */public class Equaldemo {public static void Main (string[] args) {First read to a string of charactersBufferedReader br = new BufferedReader (new InputStreamReader (system.in));String s = null;try {s = Br.rea

Python, Practice turtle eating fish

],list_y[1]) defMove (self):#Random Move positionnew_x = Self.x+r.choice ([1,-1]) new_y= Self.y+r.choice ([1,-1]) #Check whether the zone is exceeded after the move ifnew_xlist_x[0]: self.x= list_x[0]-(new_x-list_x[0])elifNew_x>list_x[1]: self.x= list_x[1]-(new_x-list_x[1]) Else: self.x=new_x#Check if the y-axis is exceeded ifnew_ylist_y[0]: self.y= list_y[0]-(new_y-list_y[0])elifNew_y>list_y[1]: Self.y= list_y[1]-(new_y-list_y[1]) Else: Self.y=new_y#returns

R practice of the principal component analysis method of R language learning

of evaluated objects, 2]*Q2>cbind (S,C)Then the value of the comprehensive score C is sorted from small to large, and the final evaluation results are obtained.Note: Here the value of C refers to the value of the real number of C, not an absolute value.Principal component Analysis R software implementation program (II):In Excel, click Copy to read the file>data>data>data.pr>summary (data.pr,loading=true) #loading =ture option lists the coefficients of the primary component corresponding to the

13th Week on-machine practice Item 4--array Sorting (1)

Questions and codes/* Copyright (c) 2014, Yantai University School of Computer * All rights reserved. * File name: Test.cpp * Author: Simbin * Completion Date: November 25, 2014 * Version number: v1.0 * * Problem Description: Write the function, complete the bubble sort, the request cannot change the following main function. * Input Description: no input. * Program output: bubble sort; */#include Operation Result:13th Week on-machine practice Item 4--

Java Edition typing practice game source

Frame1_jbutton2_actionadapter (this)); Jlabel2.settext ("First off: 10"); Jlabel2.setbounds (New Rectangle (414, 473, 171, 21)); Contentpane.add (JPANEL1); Contentpane.add (JButton2); Contentpane.add (JButton1); Contentpane.add (JSlider1); Contentpane.add (JLABEL1); Contentpane.add (JLABEL2); This.addkeylistener (New MyListener ()); Jbutton1.addkeylistener (Ne

Java Programs: Students practice addition operations

Import Java.util.Scanner;public class Additionquiz {public static void Main (string[] args) {int number1 = (int) (System.currenttimemillis ()%10);int number2 = (int) (System.currenttimemillis () *7%10);System.out.println ("What is" +number1+ "+" +number2+ "?");Scanner input = new Scanner (system.in);int answer = Input.nextint ();System.out.println (number1+ "+" +number2+ "=" +answer+ "is" + (Number1+number2==answer) ");}}There are many ways to generate random numbers, and now the System.currentt

13th Week on-machine practice project--the big toss of the array

, and outputting the changed values. * Input Description: no input. * Program output: Reverse order output and doubling output; */#include Operation Result:(3)Questions and codes/* Copyright (c) 2014, Yantai University School of Computer * All rights reserved. * File name: Test.cpp *: Simbin * Completion date: November 24, 2014 * Version number: v1.0 * * Problem Description: Create an integer array of length 16 and initialize it, first output the number of multiples of the element value in th

C # Multithreading Practice-Thread synchronization

appropriate resources are allocated! In this stateThe poll thread under is not blocked, unlike a thread that waits for a eventwaithandle (typically built with such a signal task).Blocking and polling combined use can produce some transformations: while // "Polling hibernation!"The larger the X, the higher the CPU efficiency, the compromise is to increase the latent time, any 20ms cost is negligible, unless the conditions in the loop are extremely complex.In addition to a slight delay, this poll

PKU C + + programming Practice Learning Note 4 operator overloading

requirements? Normal functions, and cannot access private members of a class Class complex{ double Real, imag; Public: Complex (Double R, double i): Real (R), Imag (i) {}; Complex operator+ (Double r);}; Complex complex::operator+ (Double R) {//can interpret c+5 return Complex (real + R, imag);}After the above overloads:Complex C;c = C + 5; There is a definition, equivalent to C = C.operator + (5);But:c = 5 + C; Compilation errorTo make the above expression possible, the + overl

"Data Analysis R Language Practice" study notes the descriptive analysis of the data in the fifth chapter (Part I)

) > Stem (s) The decimal point was 1 digit (s) to the right of the | 0 | 44 0 | 779 1 | 011233344 1 | 5557889 2 | 0344 5.5.4 Box Line diagram > BoxPlot (cars$speed) 5.5.5 Experience Distribution MapThe function ecdf () in R gives the empirical distribution of the sample, plotted through plot () ECDF (x) Plot (x,...,ylab= "Fn (x)", verticals=false,col.01line= "Gray70", peh=19) "Data Analysis R Language

C # Multithreading Practice-Thread synchronization

hibernation!"The larger the X, the higher the CPU efficiency, the compromise is to increase the latent time, any 20ms cost is negligible, unless the conditions in the loop are extremely complex.In addition to a slight delay, this kind of polling and hibernation can be combined very well, perhaps its greatest usefulness is that programmers can abandon the use of complex signal structures to work.Use join to wait for a thread to completeYou can block a thread until another thread ends by using th

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