Hi,
I was allowed to upload two contests from Petrozavodsk camps, Yandex Cups 2018 and 2019, into Codeforces Gyms:
These contests are mostly authored by Zlobober and ifsmirnov, with the help of some other people. Yandex Cup 2018 has more easier problems and less hard problems.
The 2018 one is also known as Grand Prix of Khamovniki (discussion on CF), the 2019 one was never published before.
Enjoy!
Please link that discussion blog to contest.
Done