Hello Codeforces community!

Since AtCoder is a favorite online judge to many of us, containing a huge volume of high quality problems, I decided to build a website called AtCoder Categories, inspired by the great AtCoder Problems website.

It's true that for many people, problem tags can ruin the experience of solving a problem. But what if someone wants to strengthen a weak area with high-quality problems from AtCoder? This tool lets you practice by topic and track your progress ~ without exposing you to the full set of tags a problem carries.

You can try it out here: AtCoder Categories

Categories and problem sets are reviewed on a regular basis. Problems from recent contests are added to the relevant categories each week. Currently, it's in an initial phase, things are expected to become more mature with next deployments.

I tried my best to categorize all problems from [ABC175~456, ARC104~218, AGC047~077]. Any feedback, suggestion, feature idea will be appreciated. Let me know in the comment or email if you face any issues / bug or want to give feedback.

Cheers!