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.
instead of streamings I would appreciate editorials in english
Sorry, we still didn't find anyone who would translate editorials from Polish.
Not even the basic idea in a few sentences?
The first day starts in 5 minutes!
Is there a way how I can submit after the contest?
You can upsolve problems here:
https://szkopul.edu.pl/p/default/problemset/oi/18
My solution for the first problem passed all the tests but got 99, why?
You likely exceed half the time limit. There is an announcement about that, also in English.
Thank you, I didn't notice it.
The stream starts in 20 minutes :)
https://www.youtube.com/watch?v=gFHN0Quott0
https://www.twitch.tv/errichto
Statements are in Polish only
Make sure to hit the English flag in the top-right corner. And you can access problems outside the contest here.
Thanks for watching! You can find my codes and the authors' codes here: https://github.com/errichto/youtube. I will try to put my codes to this git repository from now on.
This time I've implemented all solutions in advance and just talked about them, not to waste time. Did you like this format or do you want me to start from a scratch and also implement everything during a stream?
Possible next streams: boring stream on Monday or Tuesday, maybe random problem-solving, maybe atcoder dp contest (next weekend?). I'm open to suggestions.
Personally I found pre-coded implementation better for understanding and saves time.
Can you please do bitmask dp and dp on subsets (problems like discussion problem of this https://codeforces.com/blog/entry/45223)