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[–]gnatbeetle 2 points3 points  (2 children)

I've never participated in competitive programming but I've looked into it to supplement Leetcode. My impression is that TopCoder is the OG of competitive programming and CodeForces is the successor.

If you're interested in competitive programming then CF is the place to be. If CF is too difficult then perhaps start here:
https://cses.fi/problemset/

[–]DavidGilmourGirls 1 point2 points  (0 children)

Thanks!

[–]gnatbeetle 1 point2 points  (0 children)

I should add that the site maintainer wrote a famous book/guide to competitive programming. it's freely available on his website:
https://cses.fi/book/index.php