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The 10 Most Popular Coding Challenge Websites [Updated for 2020]
Ankita Sharda
Senior Human Resource Executive || Hired for Adidas & KPMG (ex-clients) | MBA, Talent Acquisition- Corporate HR.
- Top coder:
TopCoder is one of the original platforms for competitive programming online. It provides a list of algorithmic challenges from the past that you can complete on your own directly online using their code editor. Their popular Single Round Matches are offered a few times per month at a specific time where you compete against others to solve challenges the fastest with the best score.
The top ranked coders on TopCoder are very good competitive programmers and regularly compete in programming competitions.
2. Coderbyte:
Coderbyte provides 200+ coding challenges you can solve directly online in one of 10 programming languages . The challenges range from easy (finding the largest word in a string) to hard (print the maximum cardinality matching of a graph).
Unlike HackerRank and other similar websites, you are able to view the solutions other users provide for any challenge aside from the official solutions posted by Coderbyte.
3. Project Euler:
provides a large collection of challenges in the domain of computer science and mathematics. The challenges typically involve writing a small program to figure out the solution to a clever mathematical formula or equation, such as finding of all numbers preceding each number in a series.
You cannot directly code on the website in an editor, so you would need to write a solution on your own computer and then provide the solution on their website.
4. Hacker Rank:
HackerRank provides challenges for several different domains such as Algorithms, Mathematics, SQL, Functional Programming, AI, and more. You can solve all the challenge directly online . They provide a discussion and leaderboard for every challenge, and most challenges come with an editorial that explains more about the challenge and how to approach it to come up with a solution. Aside from the editorial, you cannot currently view the solutions of other users on HackerRank.
5. Code Chef:
CodeChef is an Indian-based competitive programming website that provides hundreds of challenges. You are able to write code in their online editor and view a collections of challenges that are separated into different categories depending on your skill level.