Jams Installation Guide (Pdf: Fill & Download for Free

So depending on the installed options on your printer there are many areas where a jam can occur and so you should check each of them for possible bits of paper left behind from previous jams (hint- use a bright flashlight). Aside from the quality of the paper itself, in my experience, that’s the most common cause. You can download a pdf or access the online user’s guide from the support section of Ricoh’s website.Support and DownloadSometimes it can be the paper itself if it’s old, of low quality, too thin or thick, too much paper curl from being in a humid environment, or sticking together with static electricity if it’s too dry. Getting a new fresh ream of 20# bond (75gsm) laser-grade paper might help. Run one sheet to see where it jams and concentrate on that area. Try not to use paper that’s meant for inkjet only.It is possible of course that there’s a mechanical issue with the machine itself in which case you would have to begin to learn how to fix printers on your own or call a service tech.Mods: I’m not trying to sell a product or direct traffic to a site, just providing the info required to answer the question.

I have done quite some research on this and come up with this list of best apps (update for 2018).Here is the link: Best Apps for Architects and Construction - Our selection for 2018 and here is the summary:1 – BIMxBest For: BIM presentation on mobile devicesWorks On: iOS and AndroidPrice: Free (BIMx) or $49.99 (BIMx PRO)If you’re using ARCHICAD, then you should consider BIMx from Graphisoft, an app that allows architects to present or share designs with clients and contractors. The app offers full control of your BIM projects, with a cloud interface for working on site. BIMx helps bridge the gap between the design studio and the construction site, sparing you the misery that comes from printing out plans.Watch the VIDEO.Features:Full access to any BIM content like 3D models, construction drawings, schedules, element or space informationAll-round 3D cutawaysHyper-model technology for integrated 2D and 3D building project navigationAdditional BIMx Pro features:Live presentation with predefined model viewsSmart measure on Layouts and in the 3D modelAirPrint and Google Could Print2 – AutoCAD MobileBest For: Viewing, creating, editing, and sharing AutoCAD drawings on mobile devicesWorks On: iOS, Android, Windows 10Price: AutoCAD mobile Premium is $5/mo or $50/yr, and Ultimate is $15/mo or $100/yrAutoCAD Mobile is a drawing and drafting app that enables you to view, create, edit, and share AutoCAD drawings on mobile devices. It’s a fitting extension to your AutoCAD desktop that lets you share plans across multiple platforms in the DWG format. When you use this app, you can forget bringing drawings to the site — and can use this instead to adjust measurements and annotate on the job.Watch the VIDEO.Features:Access drawings from your mobile device in the field or outside the officeSupport for multiple layers to see more detail and contextual information than with paper drawingsDraft, edit, mark-up, and measure plans at the job site or on the goShare updated drawings with colleagues and clientsSet your location, and walk inside your drawingGet updated drawings in AutoCAD when you get back to the office3 – Construction Master Pro AppBest for: Solving construction-math problems on the jobsite or in the office, including completing layouts, plans, bids, and estimatesWorks On: iOS, Android, WindowsPrice: $24.99Installing a calculator app on your phone saves you from lugging around a physical calculator. The Construction Master Pro App lets you solve tough construction-math problems on the jobsite or in the office, thereby reducing costly errors and saving time and money. CM Pro can help you do almost everything, from laying out stairs to figuring out how much drywall to use to calculating right angle solutions. This app will help you and your crew on every phase of your project’s estimating, bidding and building process.Watch the VIDEO.Features:Dimensional math and conversionsA host of right-angle tools including irregular hip/valley and jacksExpanded and arched rake-wallArea and volume solutionsAdvanced stair layoutsRoof/rafter calculations (bundles, squares, pitch, plan area, etc.)Trigonometric functionsBuilt-in help:just press and hold the desired key for explanationsAdvanced Tape function enables you to display, review, save and email inputs4 – ArchiSnapperBest For: Creating field reports, site inspections, and punch listsWorks On: Web, iOS and AndroidPrice: Starting at $24/monthCreating field reports from site visits can be a long and tedious process. ArchiSnapper is a simple tool that allows you to draft reports with observations, photos, annotations, assignees, and locations on floor plans. After syncing, the reports and to-do lists are available from the cloud account (on your desktop) for further editing and distribution. Just think: No more struggling with Word or Excel to draft field reports –which will save you hours each week!Watch the VIDEO.Features:Collect data, sketch on photos, assign items, and mark up blueprints on-siteFormat the layout of your PDF reportsAutomatic observation numberingClone your previous report to start a new oneManage your observation categories and/or checklistsWork together with your colleagues on the same ArchiSnapper accountCollaborate with (sub)contractors5 – MagicplanBest For: Creating professional floor plans by taking picturesWorks On: iOS and AndroidPrice: $2.99/plan or $9.99/month (for unlimited plans)Over 15 million (!) downloads can’t be wrong. magicplan is a room-scanning app that uses input from either your smartphone or tablet to devise complete floor plans. With its augmented reality technology, magicplan lets you create your floor plan within seconds: Pictures of the corners of the room are turned into measurements and can be fine-tuned in the 2D overview. Or, scan multiple rooms to complete floor plans of entire buildings — and even add furniture if you want. This app takes a bit of practice to get the hang of, but once you’re familiar with how it works, it’s a great tool.Watch the VIDEO.Features:Magical room capture, room drawing, draw over existing floor plan, room assembling, room duplication/mirroring, imperial/metric unitsAdd objects (from the library), annotations, photos and attributes to generate reports or complete estimatesEstimated materials and costsExport floor plans as PDF or CAD filesBackup your plans to the cloud and work together with multiple users on the same account6 – Morpholio Trace ProBest for: Drawing revisions and sketching with layersWorks On: iOSPrice: Free, with monthly or yearly subscription for full PRO featuresMorpholio Trace is a great sketching app for architects. Used with an iPad or iPad Pro and Apple Pencil, it allows users to instantly draw on top of imported images, or background templates, layering comments or ideas to generate immediate sketches that are easy to circulate. Based on the reviews, it’s clear that users really love this app.Watch the VIDEO.Features:Create designs with color, templates, styles, stencils and layersMark-up plans, drawings, progress images or contact sheetsUse any two points to set a scale in imperial or metric unitsImport images from other sources, take pictures and add markups7 – TSheetsBest For: Tracking your timeWorks On: Web, iOS and AndroidCost: Free for the first user, $16 base fee + $4 per user/month starting from the second userFor most architects, how much time you spend directly affects how much money you’ll earn. So tracking time correctly is crucial for making sure you get paid correctly. Enter TSheets, which allows you to perform these tasks on your phone. No more illegible or lost paper time cards, and no more payroll spreadsheets!Watch the VIDEO.Features:Very simple and easy to use (We and some of our customers have tried it ourselves; no training or manuals needed.)Facial recognition technology to deter buddy punchingA wall-mounted time clock app (called “TSheets Kiosk”) is ideal for job sitesAbility to attach photos to timesheetsConnects to your favorite accounting or payroll softwareTSheets GPS time clock maps employee locations as they move and travel throughout the dayComing soon: Location aware tracking (like geofencing, only better)8 – Sun SeekerBest For: Tracking and analyzing solar path and shadeWorks On: iOS and AndroidPrice: $9.99Although not purely focused on the architectural field, this app makes a great companion tool for architects. It helps you decide on the right orientation for your buildings by providing data like the solar path, the winter and summer solstice paths, and sunrise and sunset times. Using a highly-interactive augmented 3D view, it allows you to instantly determine the amount of sunlight your building will receive.Watch the VIDEO.Features:Uses GPS, magnetometer and gyroscope to find the correct solar position and path for your current location3D augmented reality camera overlay view showing the sun’s current position, and its path with hour points markedCamera view also has an optional pointer to guide you toward the current location of the sunMap view showing solar direction arrows and elevations for each hour of the dayAbility to choose any date and view solar path for that day9 – Shapr3DBest For: 3D modeling with Apple PencilWorks On: iOS onlyPrice: Free; PRO subscription costs $29.99/month or $299.99/yearShapr3D is a 3D CAD app for the iPad and the Apple Pencil. It enables architects to draw sketches quickly and easily before turning them into 3D shapes. Shapr3D can be used together with other CAD software. It’s designed for precise solid modeling and runs on the same engine as most of the desktop CADs, Parasolid. Thanks to its novel interface and user experience, it can be used to create 3D sketches much faster than with traditional 3D CAD. Contrary to the typical CAD software, with Shapr3D and its neat UX/UI, there’s no need to watch lots of YouTube videos before you can start doing simple things. Click here to readhow an architect uses Shapr3D.Watch the VIDEO.Features:Draw sketches quickly, and make them well-defined with powerful constraint toolsLoad models (XT, STEP, IGES, SHAPR) and start manipulating them or importing images as a referenceExport in common 3D formats (XT, STEP, IGES, STL) and use them in CAD appsSend your model to your 3D printer cutter software10 – Autodesk FormItBest for: 3D modeling software that enables sketching, collaborating, analyzing, and sharing early-stage design concepts from your phone or tabletWorks On: Web, iOSPrice: Click here to compare FormIt (free) with FormIt PRO (Note: FormIt Pro is available only as part of the Autodesk Architecture, Engineering & Construction Collection, which also includes Revit, Autocad, etc.)While SketchUp has been all-dominating in this space, we see Autodesk FormIt, which offers intuitive 3D sketching in a web browser or mobile app, as a worthy contender. Conceptual design should drive BIM: With FormIt, you can begin the conceptual design (defining floor layers, orientation, building envelope and floor plans), and once the design is settled, continue the working drawings process inside Revit. (When a conceptual design is in SketchUp, the geometry really isn’t going to work seamlessly in Revit.)Watch the VIDEO.Features:Core functionality is free, and includes the 3D sketching tools, advanced geometry, two-way connection to Revit, and the FormIt Converter for importing existing SketchUp filesFormit PRO comes with advanced features like integrated energy analysis, parametric conceptual design, real-time collaboration, customized design, and a Windows installed versionThe FormIt and Dynamo Studio connection enables customized parametric content to be placed and manipulated in FormIt — which enables you to review numerous design options quickly before making decisions11 – iHandy LevelBest For: Checking the level of surfacesOperating System: iOS and AndroidPrice: FreeThis app allows you to check the level of surfaces using only your cell phone. This pocket leveler features a traditional bubble level interface, as well as a digital display of the current angle, measured in degrees from the horizontal.Watch the VIDEO.Features? No need to include extra features for this one. Its beauty is in its simplicity.Bonus Apps for The Road12 – WazeBest for: Avoiding traffic jamsPrice: FreeWorks On: Android and iOSWaze is a free navigation app that saves you from wasting time in traffic. It uses user feedback — like mentions of traffic jams, police locations, and roadblocks — to find better routes for your next trip. Waze (or Google Maps, which is very similar) is a must-have, especially for architects, contractors, and construction engineers who are often on the road. Let’s not forget: Time is your most valuable asset, so being stuck in the middle of traffic is a huge pain. Not to mention, traffic jams are stressful! (More about avoiding stress below.)Watch the VIDEO.Features:Fastest route to destinationReminder for when to leave, based on actual traffic conditionsFind the cheapest, closest gasGet alerts when you’re over the speed limit13 ExpensifyBest for: Managing receipts and expensesWorks On: Web, iOS and AndroidPrice: Free for individuals, $5/month per user for small companies (like most architecture firms)This app was not designed specifically for architects, but it’s a real productivity booster for anyone struggling with expenses. Architects are often on the road, and keeping track of expenses like food, travel, and fuel can be a pain. Expensify automates every step, from receipt scanning through reimbursement. Even expense reports are finished in just one click: Simply take a photo of a receipt, and the app adds it to an expense report, which can automatically be submitted, approved, and even reimbursed the very next day.Watch the VIDEO.Features:One-click receipt trackingAutomatic expense reporting and submitting for approvalNext-day reimbursementIntegrations with all major accounting softwaresIf all these apps can’t help you save time and reduce stress, and you’re desperate for piece of mind, there’s only one last app we recommend…14 Calm – Meditate, Sleep, Relax :)Best For: Practicing meditation and mindfulnessPrice: $12.99/month, $59.99/year, or $299.99 for a lifetime subscriptionAvailable on: Web, iOS and AndroidCalm uses mindfulness and meditation to bring more clarity, joy, and peace to your daily life. Whether you’re an experienced meditator or a beginner, there are sessions for you on Calm. A subscription gives you access to a new inspiration and meditation session every day, along with multi-day themed programs and individual guided and unguided meditations. Calm has more than 200,000 reviews and is ranked in the top five health and fitness apps, so it’s a safe choice for anyone hoping to get started with meditation.Hope you like this list, and feel free to check out the full article here: Best Apps for Architects and Construction - Our selection for 2018

Most comprehensive list ever.List of Lists☆NameDescription★★★Good Blog Post Resources about Algorithm and Data Structures — CodeforcesA collection of fantastic tutorial blog posts written by Codeforces users. Some intriguing ones include Palindromic Trees, Policy Based Data Structures, and a lot more.★★★Data Structures and Algorithms — CodeChef DiscussA very complete list of competitive programming resources. A must-have in your browser bookmark.★★★How to prepare for ACM — ICPC? — GeeksforGeeksA detailed walk-through of the preparations for ACM-ICPC.SyllabusesFind out what topics you need to learn.☆NameDescription★★★IOI SyllabusA detailed syllabus on which IOI contestants will be tested. This is still somewhat relevant to ACM-ICPC.★★★How to prepare for ACM — ICPC? — GeeksforGeeksA detailed walk-through of the preparations for ACM-ICPC.★★☆Programming Camp SyllabusA list of important topics in competitive programming with exercise problems.★★☆Juniors Training Sheet, by Mostafa Saad IbrahimSimple problems for newcomersTutorial WebsitesAwesome websites with great tutorials.☆NameDescription★★★Topcoder Data Science TutorialsA list of tutorials written by respected Topcoder members. Many top programmers started learning data sciences from here.★★★E-Maxx (Russian), (English)A tutorial website widely used and referenced in the Russian-speaking competitive programming community. Only a small fraction of the original site is translated into English, but Google Translate would work okay.★★☆Algorithms — GeeksforGeeksA website with a large archive of nicely written articles on different topics. It is a great complimentary resource for algorithm courses.★★☆PEGWikiA website with amazing in-depth wiki-like writeups on many topics. It's far better than those on Wikipedia in my opinion.★★☆Notes — HackerEarthA great crowdsourcing platform for tutorials. Also visit Code Monk.★★☆USA Computing Olympiad (USACO)Contains several training pages on its website which are designed to develop one's skills in programming solutions to difficult and varied algorithmic problems at one's own pace.★★☆basecsA blog with in-depth, illustrated tutorials on basic algorithms and data structures.★★☆Competitive Programming — CommonloungeShort video tutorials for beginner and intermediate concepts. Advanced tutorials selected from the best ones available on various CP blogs.★☆☆OLYMPIADS IN INFORMATICSAn international journal focused on the research and practice of professionals who are working in the field of teaching and learning informatics to talented student.★☆☆algolist (Russian)A Russian website devoted to algorithms of all sorts. Some topics listed on this website seems pretty interesting.★★☆演算法筆記 (Algorithm Notes) (Chinese)One of the most popular tutorial websites among the Taiwanese competitive programming community. The maintainer for this website spends immense efforts on researching algorithms.★★☆国家集训队论文 1999-2015 (Papers from Chinese IOI training camps) (Chinese)Papers from the Chinese IOI training camps. It's interesting for the fact that one can tell different regions emphasize different things.Open CoursesConsider beginning your competitive programming journey with these awesome courses!☆NameDescription★★☆Code Monk, by HackerEarthA fantastic step-by-step tutorial on the essential topics in competitive programming.★★★Stanford CS 97SI: Introduction to Competitive Programming ContestsOffers comprehensive lecture slides and a short list of exercise problems.★★☆How to Win Coding Competitions: Secrets of ChampionsA course by ITMO University on competitive coding on edX.★★☆Codechef's Indian Programming CampVideo Lectures from Codechef's Indian Programming Camp 2016. Lectures given by top competitive programmers like Sergey Kulik, Kevin Charles Atienza and Anudeep Nekkanti. Primarily focused on exploring these concepts by applying them to actual competitive contest problems.★★☆Reykjavik T-414-ÁFLV: A Competitive Programming CourseAn awesome course taught by Bjarki Ágúst Guðmundsson (SuprDewd). These lectures feature neat slides and a nice list of problems to practice.★★☆NCTU DCP4631: Problem Solving and Programming TechniquesA course on basic topics featuring good lecture slides.★☆☆Materials (English) from Arabic Competitive Programming ChannelSome materials (slides & source codes) covering a broad range of algorithmic topicsOpen Courses for Algorithms and Data Structures☆NameDescription★★★prakhar1989/awesome-courses#algorithmsA fantastic list of open courses offered by notable institutions (MIT, Stanford, UC Berkeley ... etc.).★★★MIT SMA 5503: Introduction to AlgorithmsLectured by Prof. Charles Leiserson (one of the coauthors of Introduction to Algorithms) and Prof. Erik Demaine (a brilliant professor who has made remarkable breakthroughs in data science), the course offers great materials, accompanied by intuitive and comprehensive analyses.★★☆UIUC Algorithm Courselecture notes, homeworks, exams, and discussion problems covering a broad range of algorithmic topicsBooksA list of recommended books for competitive programming.☆NameDescription★★☆Competitive Programming, by Steven and Felix HalimThis book contains a collection of relevant data structures, algorithms, and programming tips. It's a well-received book. ... The first edition is free for download (pdf).★★☆Programming Challenges: The Programming Contest Training Manual, by Steven Skiena and Miguel RevillaThis book includes more than 100 programming challenges, as well as the theory and key concepts necessary for approaching them. Problems are organized by topic, and supplemented by complete tutorial material.★★☆Competitive Programmer's Handbook, by Antti Laaksonen (pllk)An introduction to competitive programming for aspiring IOI and ICPC contestants. Free to download (pdf).★★★Looking for a Challenge, written by a group of authors associated with the Polish OlympiadsMost of the problems described in the book are really hard but they are explained in such a way that even beginners can understand. It appears to be out of stock (as of Aug, 2016), but you can reserve one on their official website.★★☆Computational Geometry: Algorithms and Applications, by Mark de Berg, Otfried Cheong, Marc van Kreveld, Mark OvermarsThis is a well-written book which covers a broad range of computational geometry problems.★☆☆The Hitchhiker’s Guide to the Programming Contests, by Nite NimajnebThis book is free for download (pdf). This book covers various topics relevant to competitive programming.★★★プログラミングコンテストチャレンジブック (Japanese), by 秋葉拓哉, 岩田陽一, 北川宜稔An absolutely phenomenal book. The contents, organized in a very coherent manner, are nothing short of amazing. ... 培養與鍛鍊程式設計的邏輯腦：世界級程式設計大賽的知識、心得與解題分享 (Chinese Traditional)★★☆算法竞赛入门经典 (Chinese), by 刘汝佳The Art of Algorithms and Programming Contests (English), 打下好基礎：程式設計與演算法競賽入門經典 (Chinese Traditional)★★☆算法竞赛入门经典——训练指南 (Chinese), by 刘汝佳, 陈锋提升程式設計的解題思考力─國際演算法程式設計競賽訓練指南 (Chinese Traditional)★★★算法艺术与信息学竞赛 (Chinese), by 刘汝佳, 黄亮An old-time classic. It's old but the contents in this book are still considered to be very difficult by today's standards.Books for Algorithms☆NameDescription★★★Introduction to Algorithms, by Thomas H. Cormen, Charles E. Leiserson, Ronald L. Rivest and Clifford SteinAlso known as CLRS (taken from name initials), this book is often referred to as the "bible" for algorithms and data structures. It's one of the most popular textbooks for university algorithm courses. This book covered various algorithms and data structures in great detail. The writing is more rigorous and can be difficult to some.★★☆Algorithm Design, by Jon Kleinberg and Éva TardosThis book revolves around techniques for designing algorithms. It's well-organized and written in a clear, understandable language. Each chapter is backed with practical examples and helpful exercises. The chapter on network flow is highly praised by lots. ... The lecture slides that accompany the textbook are available on its official website.★★☆The Algorithm Design Manual, by Steven S. SkienaThe book is written in more readable text. Some find it comprehensive than other books. You can also find some good resources (including the author's own video lectures) on its official website.★★★Algorithms, by Robert Sedgewick and Kevin WayneThis book is neatly categorized, coupled with elaborate explanations and fantastic illustrations. It is used in some IOI training camps as a textbook.Books for Mathematics☆NameDescription★★☆Discrete Mathematics and Its Applications, by Kenneth H. RosenDiscrete Mathematics is closely relevant to competitive programming. This book provides comprehensive materials on a wide range of topics including: Logics and Proofs, Sets, Functions, Sequences, Matrices, Number Theory, Recursion, Counting, Probablity, Graphs, Trees and Boolean Alegra to name but a few.★★☆Concrete Mathematics: A Foundation for Computer Science, by Ronald L. Graham, Donald E. Knuth, Oren PatashnikThe book offers a deeper insight into Discrete Mathematics with more emphases on number-related topics.★★☆Linear Algebra and Its Applications, by David C. Lay, Steven R. Lay, Judi J. McDonaldThe book does a brilliant job at bridging the gap between a physical system (for scientists and engineers) and an abstract system (for mathematicians).★★☆Introduction to Probability, by Charles M. Grinstead, J. Laurie SnellThis is a well-written introductory probabilities book. ... It's free for download (pdf) (released under GNU Free Documentation License).★★☆How to Solve It: A New Aspect of Mathematical Method, by G. PolyaAn old-time classic. In this book, the author provides a systematic way to solve problems creatively.Sites for PracticeGood online judge systems / contest platforms to practice.☆NameDescription★★★CodeforcesCodeforces is one of, if not, the most popular contest platforms out there. Currently maintained by Saratov State University, it features regular contests and countless awesome original problems. Additionally, every contest provides immediate helpful tutorials (usually) written by the authors themselves. Codeforces also houses a strong and engaging community. All in all, one would indeed learn and improve tremendously here.★★★TopcoderTopcoder has been around since 2001. Rich in history, It's considered to be one of the most prestigious organizations when it comes to technology competitions. Hundreds of SRMs gave birth to an abundant problemset. Problems here are typically more challenging than others and Topcoder therefore appeals to many elite programmers. The annual Topcoder Open (TCO) is also a widely-discussed event.★★★Google Code JamGoogle Code Jam is certainly one of the most highly-esteemed programming competitions. The competition consists of unique programming challenges which must be solved in a fixed amount of time. Competitors may use any programming language and development environment to obtain their solutions.★★☆CodeChefCodeChef is a non-profit educational initiative of Directi. It's a global competitive programming platform and has a large community of programmers that helps students and professionals test and improve their coding skills. Its objective is to provide a platform for practice, competition and improvement for both students and professional software developers. Apart from this, it aims to reach out to students while they are young and inculcate a culture of programming in India.★★★SPOJThe SPOJ platform is centered around an online judge system. It holds a staggering amount of problems prepared by its community of problem setters or taken from previous programming contests, some of which are great problems for practice (refer to the Problem classifiers section). SPOJ also allows advanced users to organize contests under their own rules.★★☆TimusTimus Online Judge is the largest Russian archive of programming problems with automatic judging system. Problems are mostly collected from contests held at the Ural Federal University, Ural Championships, Ural ACM ICPC Subregional Contests, and Petrozavodsk Training Camps.★☆☆HDUHDU is an online judge maintained by Hangzhou Dianzi University. It's home to many classic problems from the Chinese IOI scene.★★★AtCoderAtCoder is a new but phenomenal contest platform created by a team of highly-rated Japanese competitive programmers.★★☆Aizu Online JudgeAizu online judge is a contest platform and problem archive hosted by The University of Aizu. It has a lot of great problems from programming competitions in Japan.★★☆UVaAn old-school problem archive / online judge with rich history. Thousands of problems, including many classic ones, are featured here. However, it is strongly advised that you practice with uHunt following its "Competitive Programming Exercise" section.★★☆HackerRankHackerRank is a company that focuses on competitive programming challenges for both consumers and businesses. HackerRank's programming challenges can be solved in a variety of programming languages and span multiple computer science domains.★★☆POJPOJ is an online judge with many great problems maintained by Peking University. Most Chinese competitive programmers began their journey here.★★☆Project EulerProject Euler features a stunning set of good math problems. It also hosts a forum where people can discuss.★☆☆HackerearthHackerEarth is a startup technology company based in Bangalore, India that provides recruitment solutions.★☆☆Caribbean Online JudgeCOJ is hosted by University of Informatics Sciences (UCI, by its acronym in Spanish), located in Cuba. Feature ACM ICPC and Progresive constest styles, mostly from Caribbean and Latin American problem setters, also has problem classifier and contest calendar.★★☆CS AcademyNew in the competitive programming scene, CS Academy is a growing online judge that hosts competitions once every two weeks. It supports live chat, interactive lessons and an integrated online editor (that actually works).★★☆Russian Code CupProgramming competitions powered by Mail.Ru: почта, поиск в интернете, новости, игры Group. Competition consists of 3 qualification, 1 elimination and 1 final rounds. For each round contestants are given 4-8 problems which must be solved in a fixed amount of time.★★☆CodeFightsCodeFights is a website for competitive programming practice and interview preparation. It features daily challenges of varying difficulty, an archive of problems and regular (every 15 minutes) mini-tournaments. Good for beginners.Problem ClassifiersSites classifying programming problems.Choose a category (eg. DP) of interest and practice problems on that topic.☆NameDescription★★★A2 Online JudgeMixed★★★Problem ClassifierSPOJ★★☆UVa Online JudgeCP Book★☆☆Codeforces TagsCF (DP)★★☆HackerRankHackerRank★★☆Juniors Training Sheet, by Mostafa Saad IbrahimSimple problems for newcomers★★☆Lucky貓的 UVA（ACM）園地 (Chinese)UVa★★☆Topcoder problem archiveList of problems with categories and complexity levelsContest CalendarsCalendars for impending programming contests.(Never miss another contest!)☆NameDescription★★★Programming Contest Calendar — HackerRankGoogle Calendar export available★★☆clist.byAPI available for use★★☆Coding Calendar (Android App)★★☆Coder's Calendar: Android App, Chrome Extension, Firefox Add-on★★★CodeHorizon: iOS App, Android AppSites for QuestionsThese are great sites to ask questions.Paste your codes at ideone, pastebin or other sites to avoid formatting issues.☆NameDescription★★★CodeforcesFor quick answers, Codeforces is definitely the go-to place to ask about anything competition-related.★★★Competitive Programming — QuoraYou would typically get more elaborate answers on Quora, but you might not have your questions answered straightaway.★★★Competitive Programming — CommonloungeMost questions get a response in < 30 minutes. Questions can range from beginner simple questions to in-depth questions.★★☆Theoretical Computer Science Stack ExchangeThis place is generally for the academics, so don't ask questions about contest problems here.★★☆Algorithmic Competitive Programming Stack Exchange (proposed)Competitive programming enthusiasts on Stack Exchange are discussing whether to create a new competitive programming Q&A site.ImplementationsAlgorithm & Data structure implementations.☆NameDescription★★★CodeLibrary, by Andrey Naumenko (indy256)CodeLibrary contains a large collection of implementations for algorithms and data structures in Java and C++. You may also visit his GitHub Repository.★★★spaghetti-source/algorithm, by Takanori MAEHARA (@tmaehara)High-quality implementations of many hard algorithms and data structures.★★★kth-competitive-programming/kactl, by Simon Lindholm (simonlindholm) et al.A phenomenally organized, documented and tested team notebook from KTH Royal Institute of Technology. One of the most well-crafted team notebooks (contest libraries) I've ever seen.★★☆jaehyunp/stanfordacmStanford's team notebook is well maintained and the codes within are of high-quality.★★☆ngthanhtrung23/ACM_Notebook_new, by team RR Watameda (I_love_Hoang_Yen, flashmt, nguyenhungtam) from National University of SingaporeRR Watameda represented National University of Singapore for the 2016 ACM-ICPC World Finals. The items in this notebook are pretty standard and well-organized.★★☆bobogei81123/bcw_codebook, by team bcw0x1bd2 (darkhh, bobogei81123, step5) from National Taiwan Universitybcw0x1bd2 represented National Taiwan University for the 2016 ACM-ICPC World Finals. This notebook contains robust implementations for advanced data structures and algorithms.★☆☆foreverbell/acm-icpc-cheat-sheet, by foreverbell (foreverbell)A notebook with some advanced data structures and algorithms including some from the China informatics scene.★☆☆igor's code archive, by Igor Naverniouk (Abednego)A good notebook by Igor Naverniouk who is currently a software engineer at Google and part of the Google Code Jam team.Language SpecificsLanguages and other miscellaneous knowledge.C/C++☆NameDescription★★☆Power up C++ with the Standard Template Library — Topcoder: Part 1, Part 2An introductory tutorial on basic C++ STLs.★★☆Yet again on C++ input/output — CodeforcesLearn more about C++ I/O optimizations.★★☆C++ Tricks — Codeforces ... What are some cool C++ tricks to use in a programming contest? — QuoraPlentiful C++ tricks for competitive programming. Note that some should be used with care.★★★C++ STL: Policy based data structures — Codeforces: Part 1, Part 2Detailed introduction to the extra data structures implemented in GNU C++. The official documentation can be found here.★☆☆C++11 FAQ (English, Chinese, Russian, Japanese, Korean)A list of FAQs regarding C++11 collected and written by Bjarne Stroustrup, the creator of C++.Java☆NameDescription★★☆How to read input in Java — tutorial — CodeforcesLearn how to read input faster. This is a must-read for those who intend to use Java for competitive programming★★☆How to sort arrays in Java and avoid TLE — CodeforcesSome tips on how to avoid hitting the worst case of quick sort★★☆BigNum arithmetic in Java — Let's outperform BigInteger! — CodeforcesA basic but faster custom BigInteger class★★☆EZ Collections, EZ Life (new Java library for contests) — CodeforcesA Java library for contests written by Alexey Dergunov (dalex). ArrayList, ArrayDeque, Heap, Sort, HashSet, HashMap, TreeSet, TreeMap, TreeList and pair classes are implementedMiscellaneous☆NameDescription★★★Bit Twiddling HacksA huge compiled list of bit manipulation tricks.★★★Comparing Floating Point Numbers, 2012 Edition — Random ASCIIEverything you need to know about floating point numbers. A must read especially for geometry topics.★★☆Object-Oriented C Style Languages: C++, Objective-C, Java, C# — a side-by-side reference sheetA detailed side-by-side reference sheet for common syntaxes.ToolsAwesome tools that will make your life easier.IDEs☆NamePlatformDescription★★★VimCLI / Cross-PlatformVim is one of the most popular text editors among advanced programmers. It allows text-editing to be done very efficiently with solely keystrokes. Vim is also highly configurable, extensible and integrates with shells (command lines) really well. The only setback about Vim is that it has a high learning curve for beginners.★★★EmacsCLI / Cross-PlatformEmacs is another popular text editor (or development environment to be more precise). The debate on "Vim vs. Emacs" is constantly brought up due to their popularity. Basically Emacs is more than just a text editor. It has plugins like file managers, web browsers, mail clients and news clients that allows users to performs these tasks directly inside Emacs. Emacs is "heavier" because of this, but it arguably has a relatively easier learning curve for beginners.★★★Far ManagerHybrid / WindowsFar Manager is the most widely-used editor in the RU/CIS competitive programming community. It's actually a file manager in its bare bones, but you can install FarColorer — a syntax highlighter plugin to program on it. Properly configured, Far Manager allows you to navigate between files very efficiently while writing your codes.★★★Code::BlocksGUI / Cross-PlatformCode::Blocks is the go-to IDE for C/C++. It's a full-fledged, versatile IDE with numerous great features. Code::Blocks is usually provided along with Vim in programming contests.★★★IntelliJ IDEAGUI / Cross-PlatformIntelliJ IDEA is certainly one of the best IDEs for Java. It's used by most competitive programmers who use Java as their main language. Be sure to check out CHelper, a very handy plugin written for programming contests.★★☆Sublime TextGUI / Cross-PlatformSublime Text is an extraordinary text editor. Packed with powerful and innovative features like Multiple Carets, Minimaps and Command Palletes, it attracts a strong and engaging community. Sublime Text is highly extensible, so be sure to have Package Control installed and explore perhaps one of the largest catalogue of plugins!★★☆EclipseGUI / Cross-PlatformEclipse is another good IDE for Java. It's an okay alternative to Intellij IDEA (A tad inferior to IDEA by today's standards). Sometimes contests only provide Eclipse for some reason, so this might be a good incentive to try and use Eclipse.★★☆CLionGUI / Cross-PlatformCLion, produced by JetBrains — the same company who made Intellij IDEA, is a powerful IDE for C++. Free educational licenses are available OR you can try out their EAP (Early Access Program)which is still free as of Aug, 2016. You may want to turn off its code inspection feature as it will cause quite a bit of lag.★☆☆Other IDEsMixedVisual Studio is the IDE to use in case you want to code in C#, but beware that it will be a 7GB installation. ... Both Atom and Visual Studio Code are built with Electron (written in JavaScript) and therefore somewhat resource-hogging. ... CodeLite is a newly rising IDE. Beware that the load-up and project-creation times can be extraordinary.Personal use☆NameDescription★★★VisuAlgoA website featuring a large collection of visualization tools for algorithms and data structures.★★★General Practice Helpers: ... CHelper(IntelliJ IDEA) (manual) ... caide (Visual Studio, CodeLite) ... JHelper (AppCode, CLion)Great tools that parse contests, inline library codes and provide testing frameworks. They save you from spending your precious time on switching windows and copy-pasting back and forth.★★☆Codeforces Parsers: ... Codeforces Parser... GoCF ... cfparser (emacs)These tools parse Codeforces contest problems and help run sample tests.★★★The On-Line Encyclopedia of Integer Sequences (OEIS)A stunning encyclopedia with a database of countless integer sequences. It also features a powerful search engine. Sometimes a seemingly difficult combinatorics problem could be equivalent to a simple or studied integer sequence.★★☆Syntax Highlighters: ... tohtml.com ... markup.su ... hilite.meVery handy for creating slides or team notebooks with pretty, formatted code snippets. Just copy the highlighted code snippets and paste them in your favorite WYSIWYG (What-You-See-Is-What-You-Get) editor!★★☆Code Sharing: ... Ideone.com ... Pastebin.com ... Ubuntu PastebinThese tools generate semi-permanent pages for code sharing. Very useful especially when you're trying to get someone else to look into your code.★★☆IneffableA simple command-line grader for local grading.★★☆uDebugA platform that provides expected outputs for user-specified inputs to problems on the UVa Online Judge. Some problems also provide additional test cases for debugging.Contest Preparation☆NameDescription★★★polygonpolygon provides a platform and a rich set of tools for professional contest preparation. ... An example: Validators with testlib.h — Codeforces★★☆Graph EditorA fantasic tool to create and visualize graphs.★★☆tcframeA C++ framework for generating test cases of competitive programming problems.★★★Virtual Judge (vjudge)Virtual Judge (vjudge) allows users to create virtual contests with problems from notable problem archives.★★☆BNU Online JudgeBNU Online Judge also allows users to create virtual contests.★★☆KattisKattis assists in contest preparation (E-mail them for assistance).CommunityMeet the god-like competitive programmers!Learn helpful tips, tutorials and insights from these people :)BlogsName (Handle)Blog NameCodeforces blogsPetr Mitrichev (Petr)Algorithms WeeklyMakoto Soejima (rng_58)rng_58's blogBruce Merry (bmerry)Entropy always increasesPrzemysław Dębiak (SomeGuyTookMyHandle)Psyho's blogAnudeep Nekkanti (anudeep2011)Namespace Anudeep ;)vexorian (vexorian)vexorian's blogAshar Fuadi (fushar)Fushar's blogLiJie Chen (WJMZBMR)WJMZBMR (Chinese)Huang I-Wen (doreamon, dreamoon)小月的耍廢日誌 (Chinese)Shiang-Yun Yang (morris1028)Morris' Blog (Chinese)Yuhao Du (TooDifficuIt, TooSimple, xudyh)xudyh (Chinese)Youtube and LivestreamsName (Handle)LinkPetr Mitrichev (Petr)YoutubeEgor Kulikov (Egor)YoutubeAdam Bardashevich (subscriber)YoutubeBohdan Pryshchenko (I_love_Tanya_Romanova)Twitch, YoutubeVladimir Smykalov (enot.1.10)Twitch, YoutubeAleksandar Abas (Alex7)YoutubeMostafa Saad Ibrahim (mostafa.saad.fci)Competitive Programming Youtube (Arabic Speech-English Text)Tushar RoyYoutube, with many tutorial videos.QuoraVisit Competitive Programming — Quora (Top 10 Most Viewed Writers).Important Community FiguresDescriptionBill PoucherExecutive Director of ACM-ICPC. CS Professor at Baylor University.Michal Forišek (misof)Organizer of IPSC and IOI. CS Teacher at Comenius University in Slovakia. Algorithm and CS Education Researcher. Former highly-rated competitive programmer.Ahmed Aly (ahmed_aly)Founder of A2OJ. HackerRank Lead Software Engineer. Former member of the Google Code Jam team.Competitive ProgrammersThanh Trung Nguyen (I_love_Hoang_Yen)Brian Bi (bbi5291)Jonathan Paulson (jonathanpaulson)Miguel Oliveira (mogers)Egor Suvorov (yeputons)Michal Danilák (Mimino)Bohdan Pryshchenko (I_love_Tanya_Romanova)Vladimir Novakovski (vnovakovski)Nick Wu (xiaowuc1)Cosmin NegruseriLalit Kundu (darkshadows)Ashish Kedia (ashish1294)Johnny Ho (random.johnnyh)Joshua Pan (lonerz)Anudeep Nekkanti (anudeep2011)Steven Hao (stevenkplus)Raziman T.V. (razimantv)Other Awesome ResourcesArticlesInformative and helpful articlesSubjectOverview of Programming Contests, by Przemysław Dębiak (Psyho, SomeGuyTookMyHandle)The 'science' of training in competitive programming — Codeforces, by Thanh Trung Nguyen (I_love_Hoang_Yen)If you ask me how to improve your algorithm competition skill, I will give you the link of this blog. — Codeforces, by Huang I-Wen (dreamoon, doreamon)How to prepare for ACM — ICPC? — GeeksforGeeks, by Vishwesh ShrimaliComplete reference to competitive programming — HackerEarth, by Ravi OjhaGetting started with the sport of competitive programming — HackerEarth, by Triveni MahathaFAQsFine answers to frequently-asked questionsQuestionHow do I start competitive programming? — QuoraHow can I become good at competitive programming? — Quora ... What is the best strategy to improve my skills in competitive programming in 2-3 months? — Quora ... What is a good 6 month plan to start and progress through competitive programming? — QuoraHow is competitive programming different from real-life programming? — QuoraWhat have you gained from competitive programming? — QuoraAwesome ListsRelevant awesome listsNameLinkC++ BooksThe Definitive C++ Book Guide and List — Stack OverflowJava BooksWhat are the best books to learn Java? — QuoraAdvanced Java BooksWhat is the best book for advanced Java programming? — QuoraAlgorithmstayllan/awesome-algorithmsAlgorithm Visualizationenjalot/algovisMathrossant/awesome-mathC++fffaraz/awesome-cppJavaakullpp/awesome-javaCoursesprakhar1989/awesome-coursesFree Programming Booksvhf/free-programming-booksInterview QuestionsNameDescriptionCareerCupThe most popular website for software engineering interview preparation.InterviewBitFeatures intriguing and refreshing game-play designs which are designed to invoke one's interest in practicing.Awesome InterviewsA curated list of awesome interview questions