[GP of southeastern europe 2021 problem
D](https://mirror.codeforces.com/gym/103439/problem/D)
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You can use several words in query to find by all of them at the same time. In addition, if you are lucky search understands word forms and some synonyms. It supports search by title and author. Examples:
305— search for 305, most probably it will find blogs about the Round 305andrew stankevich contests— search for words "andrew", "stankevich" and "contests" at the same timeuser:mikemirzayanov title:testlib— search containing "testlib" in title by MikeMirzayanov"vk cup"— use quotes to find phrase as istitle:educational— search in title
Results
1.
Young Tableaus and the Hook Length Formula Boring backstory of this blog
-----------------------------
In 300IQ contest 3, there [was a problem](https://mirror.codeforces.com/gym/102538/problem/D) where you had to count the number of permutations with two disjoint longest increasing subsequences. We VCd this contest while practising for ICPC, and didn't solve this problem during the contest, so I was very interested to see how it could be solved. Turns out the solution uses something called Young diagrams, and unless you already know what they are, the editorial is impossible to understand.
I asked if someone knew about Young diagrams on the competitive programming discord, and got linked [a paper](https://github.com/enkerewpo/OI-Public-Library/blob/master/IOI%E4%B8%AD%E5%9B%BD%E5%9B%BD%E5%AE%B6%E5%80%99%E9%80%89%E9%98%9F%E8%AE%BA%E6%96%87/%E5%9B%BD%E5%AE%B6%E9%9B%86%E8%AE%AD%E9%98%9F2019%E8%AE%BA%E6%96%87%E9%9B%86.pdf) from the Chinese IOI selection camp, written by [user:yfzcsc,2021-12-22]. If you can speak chinese, you shoul...
2.
Problems that I authored so far **UPD 1 [May 17 2025]:** I added my problems from Ukrainian Olympiad in Informatics (among others). They are available here: [contest:105820]
Hi everyone! I wanted to write such a blog for a long time, motivated by similar blogs [by](https://mirror.codeforces.com/blog/entry/108940) [user:adamant,2023-02-20] and [by](https://mirror.codeforces.com/blog/entry/108595) [user:tibinyte,2023-02-20]; I finally decided to do it after my Universal Cup contest. This is not a super-comprehensive list, I also set some problems for some local contests, but that's most of it.
I want to encourage other setters to write such blogs. For me, it's very interesting to read about the backstories of some problems and also to see all the problems by some author gathered in one place (as most authors give problems to several platforms).
One important point. As you will see from the comments, many of my problems were improved by other people, and I myself improved some problems by other people. I think that it's cruc...
://codeforces.com/gym/103469/problem/E) | GP of IMO | | | 59 | August 2021 |
[Fancy Formulas](https
3.
Opencup GP of Europe Hello everyone,
on Sunday GP of Europe will take place. It's a mirror of CERC contest, hope you like it.
Let's discuss the problems here after the contest!
Opencup GP of Europe, Hello everyone, on Sunday GP of Europe will take place. It's a mirror of CERC
contest, hope you, on Sunday GP of Europe will take place. It's a mirror of CERC contest, hope you
like it.
4.
Opencup GP of Europe div. 2 Good morning. Does anyone knows if the 2nd division of GP of Europe will be held today? It's 40 minutes after the contest should have started.
<br>
11.11.2018 12:00 Grand Prix of Europe
<br>
<br>
**Upd.** div. 2 system appeared and is planning to start at 13:00
Opencup GP of Europe div. 2, Good morning. Does anyone knows if the 2nd division of GP of Europe will be
held today? It's 40
5.
OpenCup GP of Eastern Europe By some reason opencup.ru seem to be down.
Div1 Entry link:
[https://official.contest.yandex.ru/opencupXVII/contest/3268](https://official.contest.yandex.ru/opencupXVII/contest/3268)
Statement link:
[http://opentrains.snarknews.info/~ejudge,2016-11-13/upload/div1.pdf](http://opentrains.snarknews.info/~ejudge/upload/div1.pdf)
Div2:
[http://opentrains.snarknews.info/~ejudge,2016-11-13/team.cgi?contest_id=10366](http://opentrains.snarknews.info/~ejudge/team.cgi?contest_id=10366)
Statements:
[http://opentrains.snarknews.info/~ejudge,2016-11-13/upload/div2.pdf](http://opentrains.snarknews.info/~ejudge/upload/div2.pdf)
OpenCup GP of Eastern Europe
6.
Waiting for... GP of Central Europe Opencup.ru: "3. 16.11.2014 11:00 Grand Prix of Central Europe" — contest had to start more than 1 hour ago, but still no information about it. Notification: "The contest is temporarily not available. Please, retry the request a bit later". Such poor.
Waiting for... GP of Central Europe, Opencup.ru: "3. 16.11.2014 11:00 Grand Prix of Central Europe" — contest had to
start more
7.
Opencup, GP of Central Europe Добрый день!
Только что закончился этап Открытого Кубка.
Давайте поделимся решениями.
Интересуют B,G,F.
[Разбор](http://mipt2014.snarknews.info/files/mipt2014n/analysis/day6.pdf)
Opencup, GP of Central Europe
8.
Opencup GP of Europe Привет, расскажите, пожалуйста, задачи A, B, H.
Opencup GP of Europe
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