AtCoder vs. CodeChef vs. SPOJ vs. TypeScript Comparison Chart

AtCoder is a programming contest website based in Japan. AtCoder is a programming contest site for anyone from beginners to experts. We hold weekly programming contests online. Every AtCoder users can use this library with minimum efforts of studying about PC. Maximize convenience for the usage in competitive programming. We completely ignore other usages. Participants can use any programming language used in AtCoder Regular Contest. Unless otherwise specified, you must compete in a contest alone. We do not allow you to team up form with others. The contestant who gives successful solutions to the largest number of problems in a given time will be the winner. If there are multiple contestants who have solved the same number of problems, whoever has done so in shorter time will be in the higher place. Execution time is measured as the maximum of real time and CPU time. Parallelization is not prohibited, but it does not lead to shorter execution time.

The SPOJ platform is centered around an online judge system, which serves for the automatic assessment of user-submitted programs. Some of its most important features include support for more than 45 programming languages and compilers, including C, C++, Pascal, JAVA, C#, Perl, Python, Ruby, Haskell, Ocaml, and esoteric languages. A rapidly growing problem-set of about 13000 tasks available for practice 24hours/day (in English, Polish, Vietnamese, Portuguese and other languages), including many original tasks prepared by the community of expert problemsetters associated with the project. A flexible testing system, supporting dynamic interaction with submitted programs and highly customisable output of assessment results. Intuitive browser-based content management which allows users to set up their own contests within a matter of minutes, and to make use of tasks already available in the system. More than 2400 contests hosted as of 2012.