Hi.
Thanks to kostka, this weekend you can participate virtually in an old edition of Polish olympiad: POI XVIII, stage 2. There are two days of a contest, Saturday and Sunday, 9-14 CET (check your timezone here). An hour after the contest ends on Sunday (so, 15 CET), I will talk about problems from both days in a stream. You can watch me on Youtube and Twitch.
Create an account in Szkopul first, link. The statements will be both in Polish and English, or the link to the English version will be provided as an announcement.
If you can't participate, I still recommend you to read the problems and try to solve them yourself before my stream.