Programming is fun, programming is an exercise for your brain, programming is a mental sport and when this sport is held over the internet involving sport programmer as a contestant then it is called Competitive Programming.
- https://codeforces.com
- https://Hackerrank.com
- https://hackerearth.com
- https://open.kattis.com
- https://Atcoder.jp
- https://Onlinejudge.org
- www.CodeChef.com
- https://SPOJ.com
- https://A2oj.com
- https://Topcoder.com
- www.1337cpc.team
- http://www.cp-algorithms.com (top)
- http://web.stanford.edu/class/cs97si/
- https://github.com/lnishan/awesome-competitive-programming
- https://github.com/BedirT/ACM-ICPC-Preparation (top)
- https://github.com/Competitive-Programming-Club-1337 (Our Repo)
- https://www.geeksforgeeks.org/how-to-prepare-for-acm-icpc/
- https://www.youtube.com/watch?v=MyeV2_tGqvw
- https://www.youtube.com/watch?v=IB2ESpnlAeE&list=PLzjZaW71kMwTGbP1suqY16w1VSb9ZNuvE&index=57 (hindi)
- https://www.youtube.com/watch?v=bVKHRtafgPc&list=PLz4C07Cc_cunpeCSSGibS6Nyceuv7-l89&index=2 (Steps and Mistakes)
- https://www.youtube.com/c/Errichto/playlists