Codeforcescodeforces.com
Get access to Codeforces data
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Programming
5 APIs
Hackerearthhackerearth.com
For compiling and running code in several languages
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Judge0 CEce.judge0.com
Online code execution system
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K
KONTESTSkontests.net
For upcoming and ongoing competitive coding contests
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Mintlifydocs.mintlify.com
For programmatically generating documentation for code
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