40 wpm

Find the center of gravity of the polygon.Nothing to say, substituting formula.#include DoubleX0,y0,x1,y1,x2,y2,s, as, Gx,gy;intT,n;intMain () {scanf ("%d",t); while(t--) {scanf ("%d",N); scanf ("%LF%LF",x0,y0); scanf ("%LF%LF",x1,y1); S=gx=gy=0; n-=2; while(n--) {scanf ("%LF%LF",x2,y2); as= (x1*y2+x0*y1+x2*y0-x1*y0-x0*y2-x2*y1)/2; S+= as; GX+ = (x0+x1+x2) * as; x1=x2; GY+ = (y0+y1+y2) * as; y1=Y2; } printf ("%.2LF%.2lf\n", gx/s/3, gy/s/3); }}Spoj problem

requirements, think, "set" in the repeating elements are still not excluded, such as the collection is "1, 1, 2, 5, 6, 7 , 10 "and target=10, according to the practice of the question will certainly have duplicates, ' 1, 2, 5 ' 1, 7 ', because there are two ' 1 ' in the collection, then how can we solve it? I also thought of a way to solve the problem, but the complexity of the time is not enough, the main code is as follows:if (target = = 0) {int end = Ret.size (); if (end = = 0 | | tmp = ret[

load PDF documents very quickly.For more information, please refer to: Fastpdfkit official websiteKkgridview.Kkgridview is a high-performance iOS form component, but Kkgridview has gradually ceased to use it since Apple introduced the relevant solution at the WWDC 2012 conference. The iOS Open source project will also have a new round of changes every iOS system update, and what will happen to iOS open source projects after the release of iOS 7, which has revolutionized Apple's previous design

Given A collection of candidate numbers (C) and a target number (T), find all unique combinations in c where the candidate numbers sums to T. Each number in C is used once in the combination.Note: All numbers (including target) would be positive integers. Elements in a combination (a1, a 2, ..., aK) must is in non-descending order. (ie, a1≤ a2≤ ... ≤ ak). The solution set must not contain duplicate combinations. For example, given candidate set and 10,1,2,7

Adding a level Two menu to the navigation bar is also very simpleDivclass= "NavBar Navbar-default"role= "Navigation"> 　 Divclass= "Navbar-header"> 　 ahref="##"class= "Navbar-brand">Navigation bara> 　 Div> ulclass= "Nav navbar-nav"> Liclass= "Active">ahref="##">Website Homea>Li> Liclass= "Dropdown"> ahref="##"Data-toggle= "Dropdown"class= "Dropdown-toggle">Series Tutorialsspanclass= "Caret">span>a> ulclass= "Dropdown-menu"> Li>ahref="##">CS

A, water problem, direct enumeration to SQRTb, each time for each enumeration, if less than the current bit, then the answer can be calculated, add the answer is: Set 3 parts, the former exactly the same part A, the middle of a new selection of B, followed by the whole arrangement of C, so that each part and each two parts can be composed of the number of reverse order, because n only 100, Inside the enumeration is also no problem, mainly in the back of the full array of C reverse logarithm, thi

# Ldconfig3) If the shared library file is installed in a different "non-/lib or/usr/lib" directory, but does not want to add the path in the/etc/ld.so.conf (or there is no permission to add the path). That can export a global variable ld_library_path, and then run the program will go to this directory to find the shared library.Ld_library_path means to tell loader which directories can be found in the shared library. You can set up multiple search directories separated by colons. For example, i

the parent class's Flushbuffer method, copies the data that might not have been copied to the Dfsoutputstream, and then calls Flushinternal, waiting for all the data to be written. Then call Namenode.fsync to persist the data on the namespace.Closeinternal is a bit more complicated, it first calls the parent class's Flushbuffer method, copies the data that might not have been copied to Dfsoutputstream, and then calls Flushinternal, waiting for all the data to be finished. Then end the two worke

June 22, 2016, the first open source free full support PHP 7 version of IDE-PDT 4 finally released. Originally I was expecting NetBeans 8.2, but PDT 4.0 was released and couldn't wait. PDT Team is pleased to announce that PDT new version-4.0 released: This is a large release, and it makes a huge performance improvement. Fixed 100 bugs: Full support for PHP 7, such as better scalar type declaration and return type (note: The previous version is also barely supported) Improving the perfor

More than 40 PHP skills useful to beginners (2) 11. do not make gzip output in your application. let apache do it. Consider using ob_gzhandler? No, don't do this. It makes no sense. PHP should be used to write applications. Don't worry about how to optimize the data transmitted between the server and the browser in PHP. Use apache mod_gzip/mod_deflate to compress the content through the. htaccess file. 12. use json_encode when echo javascript code fro

Enumeration, typically used to customize some static variables, with keys and values.such as Audit status:public enum enumstate{Pending review = 1, technology audited = 2, financial audited = 3, Mister Audited =4}This allows you to use enumerations for code operations instead of using strings.Get string: enumstate. Technology has been audited. ToString ()Get value: (int) enumstate. Technology auditedBinding in HTML. Loop Enumeration@foreach (var name in Enum.getnames (typeof (Enumstate))){int ke

Linux is Utf-8), and the GBK is used when extracting under Windows, because if it is compressed under Linux, To the window under the decompression will appear garbled, because some in the compression of the specified encoding for GBK(Original link:zipoutputstream file Chinese garbled )String targetName = resourcesfile.getname () + ". rar";//Purpose Compress file name//FileOutputStream outputstream = new FileOutputStream (targetpath+ "\ \" +targetname);FileOutputStream OutputStream =NewFileOutpu

n) { vectorCombination SumGiven a set of candidate numbers (C) and a target number (T), find all unique combinations in C Where the candidate numbers sums to T.The same repeated number is chosen from C unlimited number of times.Note: All numbers (including target) would be positive integers. elements in a combination (a 1 , a 2 , ..., a k ) must is in non-descending order. (Ie,a 1 ≤a 2 ≤ ... ≤a k ). The solution set must not contain duplicate combinations. For exampl

There are always very few good things, especially some of the collected PSD files. On the Internet, people like to listen to songs and watch videos online. I don't know if you do not pay attention to it. The playback interface is very user-friendly, the web designer literally creates beautiful Player Skins. So today, we are dedicated to 40 PSD resources for designers.It is rare on the Internet. If you are developing such a project, it will certainly h

We have seen that more websites are using HTML5 to replace Flash and even online games.For example, HTML5 plays a cool role in audio and video elements, so that web games may not have flash installed and you can play games without any plug-ins, today, we recommend 40 such examples for our designers, including the familiar Angry Birds and other online games.ProgramYou can refer to how it is implemented. Angry Birds (this game can only be played with Go

New Twitter icon Go social icon set Die cut Pinterest icons Pantone colour Of The Year social media icons Black white 3D Social Icons Fresh subtle social media icon set Dark Social Icons Social Icons are often used during development. Today, we will share 40 free social network icons, which are well designed. Free retro Social Icons 8-bit social icon pack Wood Social Icons set Vol 1 Social media icons 3D isometric

Log on to the following website to create your own website. Http://pages.google.com/ Demo: http://rocsky.googlepages.com/ Google has launched a beta version of a free hosting service, GooglePage creator. The service, which is currently limited to existing usersOf Google's Gmail, allows users to build a web page using a web-basedInterface. Each site has its own subdomain, with a web address usingThe structure of http://gmailname.googlepages.com, and users can choose among up to

For web designers, creating a portfolio may be challenging. To attract attention, the portfolio must show your abilities. This is a bit like making a resume, so that people can see what you are good at and what you highlight. If you want to design a personal work webpage, the following cases will be of great help to you.Wingcheng.com Christopher Meeks Yaron scholar Hugs for monsters Future in bold Sylvain Toulouse Giles Revell Kyletezak.com Ewen Spencer Grid. Christian Knopf Adham dan

preprocessing of things.By the way, the HDU is pressed. Shortest = = (space is too weak >_1#include 2#include 3 #definell Long Long4 using namespacestd;5 Constll modd=1000000007;6ll f[101],a[101];//the value of a array's factorial7 ll I,j;8 intn,x;9 BOOLu[101];Ten inline ll run () { Onell ans=0, now=0, MN; Amemset (U,0, n+1); - for(i=1; i){ -scanf"%d", x); u[x]=1; the for(j=1, mn=0; j) - if(!u[j]) ans+=f[n-i]+a[n-i]* (now+mn), ans%=modd,mn++; - for(j=1; jif(!u

quotes" and the dangers of SQL injection. I ' m hoping that most developers reading this is already familiar with SQL injection. However, I list it here because it's absolutely critical to understand. If you've never heard the term before, spend the entire rest of the day Googling and reading. 39. Use strlen () because you want to invoke some other operations such as lowercase and hash table query so the speed is not too good, we can use Isset () to achieve similar functions, isset () faster th