107 Alternatives to atcoder.jp

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codeforces.com

Codeforces. Programming competitions and contests, programming community

cses.fi

CSES

cp-algorithms.com

vjudge.net

Virtual Judge

spoj.com

SPOJ (Sphere Online Judge) is an online judge system with over 315,000 registered users and over 20000 problems. The solution to problems can be submitted in over 60 languages including C, C++, Java, Python, C#, Go, Haskell, Ocaml, and F#. SPOJ has a rapidly growing problem set/tasks available for practice 24 hours/day, including many original tasks prepared by the community of expert problem setters associated with the project.

onlinejudge.org

Online Judge

usaco.org

USACO

a2oj.com

Static A2OJ

oeis.org

Given an integer sequence, find its name, and formula.

cpbook.net

stopstalk.com

StopStalk

ideone.com

Compile various programming languages online. Add input stream, save output, add notes and tags.

codechef.com

Start your coding journey with our expert-designed, job-focused practical coding courses. Learn to code from scratch with interactive, beginner-friendly lessons.

csacademy.com

CSAcademy is a next generation educational platform. Discover computer science with interactive lessons and a seamless online code editor.

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opengenus.org

In 1970s, Computing was not a science. Thanks to the legends who made it is as important as Physics & Mathematics. We are a Scientific Community focused on Computing Research & Publishing.

icpc.global

The ICPC International Collegiate Programming Contest

topcoder.com

Top Website Designers, Developers, Freelancers for Your Next Project | Topcoder

usaco.guide

A free collection of curated, high-quality resources to take you from Bronze to Platinum and beyond.

cppreference.com

cppreference.com

hackerearth.com

Helping 7.6M+ developers be better through coding contests, data science competitions, and hackathons. Trusted by recruiters from 1,000+ companies hiring the best developers.

kenkoooo.com

Applications | kenkoooo.github.io

codingninjas.com

Best Programming Institute in India

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ioinformatics.org

Cultural and recreational events are organized on the remaining days. ©2008 International Olympiad in Informatics http://ioinformatics.org/

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alphastar.academy

interviewbit.com

Learn and Practice on almost all coding interview questions asked historically and get referred to the best tech companies

programming-place.net

Programming Place Plus

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hackerrank.com

HackerRank is the market-leading coding test and interview solution for hiring developers. Start hiring at the pace of innovation!

yukicoder.me

yukicoder

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leetcode.com

Level up your coding skills and quickly land a job. This is the best place to expand your knowledge and get prepared for your next interview.

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techiedelight.com

Techie Delight is a leading platform for technical interview preparation. Prepare for your coding interview with Techie Delight. Improve your algorithmic skills and crack interviews with top tech companies.

udebug.com

Home | uDebug

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afteracademy.com

AfterAcademy is a platform that offers online courses for everyone. We have online courses for college students, working professionals, and learning enthusiasts. These learning paths with online courses have been developed by the top professionals in the industries, tailored to your current skill sets.

codesdope.com

Learn programming languages in a very simple way from scratch. Discuss and ask questions or doubts and get them cleared with well-suited people. Strengthen your basics with practice section.

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gatevidyalay.com

Gate Vidyalay | A Temple of learning for GATE, NET, PSU's

cplusplus.com

Includes references, tutorials, and a forum section where users can share their problems and ideas.

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marycore.jp

ioi2017.org

The official website of the 29th International Olympiad in Informatics (IOI 2017) held from July 28 to August 4, 2017 in Tehran, Iran.

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iarcs.org.in

Its members are leading researchers in Computer Science drawn from major institutions from all over the country. IARCS aims at promoting excellence in Computing. It does so by facilitating interaction amongst its members, acting as a bridge between Academia and Industry and finally by elevating the quality of Computer Science education within the country. IARCS runs the hugely successful and the longest running conference in computer science in India; FSTTCS. ...

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EnjoyAlgorithms

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ivyleaguecenter.org

Education is not the filling of a pail, but the lighting of a fire. Genius is 1% inspiration and 99% perspiration!

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u-aizu.ac.jp

With introduction and guide to admissions, curriculum, campus life, career paths, events, faculty, research, and use of facilities.

onlinegdb.com

Online GDB is online compiler and debugger for C/C++. You can compile, run and debug code with gdb online. Using gcc/g++ as compiler and gdb as debugger. Currently C and C++ languages are supported.

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pepcoding.com

Free online videos of Data Structure using Java and C++. Best coding institute in Delhi, Best computer programming institute in Delhi, Best java training classes, Coding classes in Delhi, Coding courses in Delhi, best computer programming institute in Delhi-NCR, Delhi's best programming institute.

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scaler.com

Develop your coding skills with our personalised 1:1 mentorship by MAANG experts by Scaler Academy. We also offer mock interviews, tailored courses to help you take charge of your career.

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kushiro-ct.ac.jp

Contains guide to departments, educational aims and learning goals, admission policies, and links.

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scrapbox.io

Write and link notes, docs, and pages in a way that's surprisingly simple. Build knowledge faster in public or private, solo or with your team.

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coderecipe.org

hackr.io

Google search shows you hundreds of Programming courses/tutorials, but Hackr.io tells you which is the best one. Find the best online courses & tutorials recommended by the Programming community. Pick the most upvoted tutorials as per your learning style: video-based, book, free, paid, for beginners, advanced, etc.

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urionlinejudge.com.br

Built through a project of Computer Science of URI University, our goal is to provide programming practice and knowledge sharing.

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lightoj.com

LightOJ Home

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programiz.com

Learn to code in Python, C/C++, Java, and other popular programming languages with our easy to follow tutorials, examples, online compiler and references.

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edureka.co

Edureka is an online training provider with the most effective learning system in the world. We help professionals learn trending technologies for career growth.

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competitiveprogramming.info

mygreatlearning.com

Learn the in-demand skills to advance your career in AI, ML, data science, digital marketing, cloud, software engg & more. Get degrees & certificate programs from top universities.

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educative.io

Build software development skills with AI-powered courses. Prepare for tech interviews, explore AWS Cloud Labs, and master in-demand technologies with the interactive online platform used by 2M+ developers.

sist.ac.jp

visualgo.net

VisuAlgo was conceptualised in 2011 by Dr Steven Halim as a tool to help his students better understand data structures and algorithms, by allowing them to learn the basics on their own and at their own pace. Together with his students from the National University of Singapore, a series of visualizations were developed and consolidated, from simple sorting algorithms to complex graph data structures. Though specifically designed for the use of NUS students taking various data structure and algorithm classes (CS1010/equivalent, CS2040/equivalent, CS3230, CS3233, and CS4234), as advocators of online learning, we hope that curious minds around the world will find these visualizations useful as well.

connpass.com

Connpass is a web service where you can easily create, and promote your events. Organizing your community or group, search, and paid events are supported.

teamblind.com

Get the inside scoop from employees on Blind. Join millions of verified professionals to find the latest jobs, salary info, interview experiences, company news and more.

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Strømme

kazune-lab.net

Documents by Kazune Takahashi.

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kichi2004.jp

kichi2004's portfolio.

kogakuin.ac.jp

With principles and objectives, history, university features, studies, research institutions, community activities, student activities, admissions and access to Shinjuku and Hachioji campus.

jpcert.or.jp

The organization coordinates with network service providers, security vendors, government agencies, as well as the industry associations. As such, it acts as a "CSIRT of the CSIRTs" in the Japanese community. ... Increase awareness and understanding of information security and the technical knowledge through education and training. ... Began its activity as a Security Task Force of JEPG/IP *1 by the volunteers 1996.10 Established as an organization under the name of Japan Computer ...