To my surprise, I didn't manage to find any AMPPZ contests on codeforces. I've solved some problems from them at training camps and, as far as I remember, these are pretty good ones. It would be great to see the contests here and to be able to virtually participate in them.
Are there some legal issues preventing this from happening, or organizers not sharing the test cases, or it just has not been attempted yet?
I tried once and failed because I didn't find contest materials besides statements.
Some old AMPPZ contests are in ejudge.
This year's AMPPZ will be the next OpenCup. We will publish the test data after it finishes.
As for previous years, I think they also ended up as OpenCups, but I'm not sure.
It would be cool to see previous AMPZZ in Codeforces::Gym. I can help with uploading (or do it by myself) if needed. Hope organizers can share materials and we can publish the contests.