Konnichiwa,

As we have Codeforces for competitive programming, I was wondering if there is a similar platform for math that has rated contests and constructive discussions

I personally face issues while solving math problems in general, especially in number theory, and I really wanna improve these concepts.

I know about platform like AoPS but it doesn't feel exactly like Codeforces in terms of frequent rated contests and clear ratings.

I’d really appreciate any suggestions or resources.

Arigato!