Hello!
I uploaded 2022-2023 Winter Petrozavodsk Camp, Day 2: GP of ainta to the CF Gym.
It is the collection of problems authored by ainta in 2015-2022. This contest is not related to me, I'm just stealing his contribution points.
Thanks to TLEwpdus, who found a solution to one of the problems.
Enjoy!
List of relevant previous contests