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Site Info - Atcoder.jpOverview of web technologies used by Atcoder.jp. Website Background AtCoder:競技プログラミングコンテストを開催する国内最大のサイトプログラミング初級者から上級者まで楽しめる、競技プログラミングコンテストサイト「AtCoder」。オンラインで毎週開催プログラミングコンテストを開催しています。競技プログラミングを用いて、客観的に自分のスキルを計ることのできるサービスです。 automatic translation provided by Microsoft AtCoder: The nation's largest site for competitive programming contestsAtCoder is a competition programming contest site that can be enjoyed by beginners and advanced programming beginners. Weekly programming contests are held online. It is a service that allows you to objectively measure your skills using competitive programming. Description on Homepage Top 100k among all websites Popularity rank Go is a general purpose programming language designed by Google. JavaScript is a lightweight, object-oriented, cross-platform scripting language, often used within web pages. jQuery is a JavaScript library that simplifies HTML document traversing, event handling, animating and Ajax interaction. Originally developed by John Resig. jQuery 1.9.1 Bootstrap is an open source HTML, CSS, and JavaScript framework. Moment.js is a library to manipulate dates in JavaScript. KaTeX is a JavaScript library for math typesetting. Popper is an open source JavaScript library for tooltips and popovers. Popper 1.14.7 Bootstrap is an open source HTML, CSS, and JavaScript framework. Animate is a CSS library focusing on animations. Animate Nginx (pronounced as "engine X") is a lightweight open source web server developed by Igor Sysoev. Amazon is a US-based e-commerce and cloud computing provider. Amazon Amazon is a US-based e-commerce and cloud computing provider. Amazon CloudFront is a content delivery web service by Amazon. Amazon is a US-based e-commerce and cloud computing provider. Gmail is the email service provided by Google. Starfield Technologies is an SSL certificate authority owned by Go Daddy. The CDNJS is a content distribution network, hosting a large number of JavaScript libraries, provided by CloudFlare. CDNJS The jQuery CDN hosts copies of the jQuery library, provided by MaxCDN. jQuery CDN Google Analytics is a free service to get detailed statistics about the visitors of a website, provided by Google. This includes the Ads conversion tracking and the Floodlight services. The Google Advertising network consists of AdSense, DoubleClick and other services. The Google Tag Manager is a Google service to support webmasters to manage tags on their websites. AddToAny is a social bookmarking and sharing service. External Cascading Style Sheets define style rules in a separate CSS file. Embedded Cascading Style Sheets define a set of style rules in a <style> element within a web page. Embedded CSS Inline Cascading Style Sheets define style rules directly within an (X)HTML element using the style attribute. Session cookies are temporary cookies, which are deleted when the user closes the browser. Persistent cookies with an expiration time of up to 1 day. Cookies expiring in hours Persistent cookies with an expiration time between 1 month and 1 year. HttpOnly cookies are used only in the HTTP protocol and not in client side scripts, which may increase security. Secure cookies are used only via an encrypted connections, which may increase security. Gzip (GNU zip) is a file compression algorithm. HTTP/2 is the second major version of the HTTP network protocol. HTTP/2 HTTP Strict Transport Security (HSTS) defines a mechanism enabling web sites to declare themselves accessible only via secure connections. HTTP Strict Transport Security The websites redirects visitors to use SSL encryption, e.g. from http://example.com/ to https://example.com/. The Open Graph protocol, originally developed by Facebook, is an RDFa-based format that enables any web page to become a rich object in a social graph. Twitter/X Cards enable automatic attachment of photos, videos and media elements to tweets. Generic RDFa (Resource Description Framework in attributes) is RDFa without further specialization. HTML5 is the fifth revision of the HTML standard. UTF-8 (8-bit Unicode Transformation Format) is a variable-length character encoding for Unicode, which is backwards compatible with ASCII. PNG (Portable Network Graphics) is a lossless compression image format, suitable to store graphics with uniformly colored areas, and originally introduced as a free, open-source successor of GIF. JPEG (Joint Photographic Experts Group) is a lossy compression method suitable to store photographic images. Scalable Vector Graphics (SVG) is an XML-based vector image format. Japan Germany
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