Coding challenges
- TopCoder
- Google Code Jam
- Google Hash Code
- Google Kick Start
- The International Conference on Functional Programming
- Challenge 24
- International Obfuscated C Code Contest
- IPSC
- Microsoft Imagine Cup
- 2022 Imagine Cup
- Codewars
- Openchallenge
- CodeChef
- HackerRank
- LeetCode
- Codeforces
- Project Euler
- ACSL