try_kuhn's blog

By try_kuhn, 4 months ago, translation, In English

Hello, Codeforces!

Congratulations to the 22 on the start of the new olympiad season! I wish your olympiad season a good one. I especially wish success to 11th graders, who will have to choose universities and apply for them this year.

I would like to invite you to participate in the mirror phase 1 of the National Olympiad in Informatics. The mirror will be held on codeforces.

This competition will be interesting rather for weaker participants (grey — turquoise on codeforces). The contest should not be difficult for experienced competitors.

The [contest_time:392106] will take place at [contest:392106].

  • The competition is by IOI standards (partial points, test groups). You will be given 4 tasks for 5 hours

  • Unrated round

  • Use of any material published before the round is permitted.

Tasks together with me were proofread for errors and tested by Irsanik, xyz., opPO, ma_sad.

Many thanks to MikeMirzayanov for Polygon and Codeforces.

Thanks a lot to Borunov for help with tournament setup in Yandex Contest system!

Registration link:

https://codeforces.com/contestInvitation/651d518fc4b205723d0e4ef98f78f0370a21fed6

If you have registered:

https://codeforces.com/contests/392106

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By try_kuhn, 10 months ago, translation, In English

Editorial of [contest:368205].

[problem:375720A]

Editorial
Code

[problem:375720B]

Editorial
Code

[problem:375720C]

Editorial
Code

[problem:375720D]

Editorial
Code

[problem:375720E]

Editorial
Code

[problem:375720F]

Editorial
Code

[problem:375720G]

Editorial
Code

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By try_kuhn, 10 months ago, translation, In English

Hello, Codeforces!

Due to Educational round, olympiad will start at 10 april

The mirror will start tomorrow, 11 of april, at 16:35

Registration closed

Final results were published. Diplomas are out

At [contest_time:368205] will be held [contest:368205]. Everyone can participate in the mirror of the contest. If you are a student of 6th — 9th forms, then fill the form to participate officially.

Contest will follow the IOI rules (test groups, partial solutions). You will be given from 5 to 7 tasks for 3 hours. Standings will be shown after ending of the round.

Thanks kefaa for amazing coordination of the round.

Tasks are checked and tested by oleh1421, gepardo, kartel, xyz., Wind_Eagle, opPO, Vlad.cpp, sadfun, Irpacci, quinque, stasevich_darina, High_Faev, Xennon.

Also thanks MikeMirzayanov for Polygon and Codeforces!

Link for registration to mirror:

https://codeforces.com/contestInvitation/81d217c46f623d0ee1687c42fa5b350d20c99a14

If you are studing in 6th — 9th grade, you can register to official round if you fill the form:

https://forms.gle/9WwuGwzLxJKpbVP19

After approving you will see contest here:

https://codeforces.com/contests/368205

Also there is a table, where you can see list of confirmed participants:

https://docs.google.com/spreadsheets/d/1u177Wdyng0GtiI440nJbu6EIMoX7slB-7q2uHUU2cQ8/edit?usp=sharing

In the round you will have english statements.

Final results:

https://drive.google.com/drive/folders/1R23TGM0pdSwioaFrcq49UgEonwtJDF3H?usp=sharing

Good luck! I wish you succesfull solves!

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By try_kuhn, 11 months ago, translation, In English

Hello, Codeforces!

I didn't want to talk here about politics, but yet the thought that this can happen in a civilized society in the 21st century is frightening.

I constantly monitor the situation (I am from Belarus), but I see very conflicting information. Ukrainians, brothers, how are you doing now? Please reply, we are all very worried about you!

Hold on! I hope this fratricidal war ends soon. It's one thing to read about it in books, and another — see everything with your own eyes.

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By try_kuhn, 15 months ago, translation, In English

Hello, Codeforces!

I'm happy to introduce autumn fees, which will be held on Misis platform! Participation is free.

approximate class schedule (it can vary depending on the level of participants)

There is an open question about lectures. Face-to-face lectures will be in Brest. I'm not sure about correspondence, because there is very few time(

Participants can communicate in our discord channel. Also I will be in it, and betweentimes answer the questions. Also, you can write to me in private messages and ask your questions. Unfortunately, I have no possibility to make English version, so it will be only in Russian.

For registration go to this link.

Preliminarily, contests will start at 11:00, will last 4 hours, for every contest will be opened upsolving.

In the misis rating system operates (you will have your color, as on CF, upsolving is rated too), so you will have motivetion to compete.

I want to thank misis, especially Daria Krohina for providing access to the MISiS system!

Good luck & high rating!

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By try_kuhn, 15 months ago, translation, In English

Hello, Codeforces!

Today I wanted to start upsolving long, short tour and final of open olympiad. Where can I upsolve (or find materials of it)?

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By try_kuhn, 20 months ago, translation, In English

Made diplomas of the Olympiad! As a result, we got the following ratio of diplomas:

Total diplomas — 29 (approximately 25%)

First diplomas — 7 (about 5%)

Second diplomas — 12 (about 10%)

Third diplomas — 10 (about 10%)

Link to diplomas:

https://drive.google.com/drive/folders/1RsYBfLAxHlRndZ_m4_FCTG7pPBG2oRdL?usp=sharing

Thank you all for participating in the Olympiad, I wish you all good luck, good mood and high ratings!

Here you can discuss today's Olympiad.

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By try_kuhn, 20 months ago, translation, In English

[contest:329695]

Editorial in PDF:

https://drive.google.com/file/d/1KL723lzYE8tVlgIUveMt2lSWDbd4nccv/view?usp=sharing

[problem:329695A]

Task author: try_kuhn

Translate author: MatesV13

Solution author: try_kuhn

tutorial
code

[problem:329695B]

Task author: try_kuhn

Translate author: MatesV13

Solution author: try_kuhn

tutorial
code

[problem:329695C]

Task author: try_kuhn

Translate author: MatesV13

Solution author: Gareton

tutorial
code

[problem:329695D]

Task author: try_kuhn

Translate author: MatesV13

Solution author: try_kuhn

tutorial
code

[problem:329695E]

Task author: try_kuhn

Translate author: MatesV13

Solution author: try_kuhn

tutorial
code

[problem:329695F]

Task author: try_kuhn

Translate author: MatesV13

Solution author: Gareton

tutorial
code

[problem:329695G]

Task author: try_kuhn

Translate author: MatesV13

Solution author: try_kuhn

tutorial
code

[problem:329695H]

Task author: try_kuhn

Translate author: MatesV13

Solution author: try_kuhn

tutorial
code

[problem:329695I]

Task author: try_kuhn

Translate author: MatesV13

Solution author: try_kuhn

tutorial
code

[problem:329695J]

Task author: try_kuhn

Translate author: MatesV13

Solution author: try_kuhn, xyz.

tutorial
code

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By try_kuhn, 21 month(s) ago, translation, In English

Hello, Codeforces!

At [contest_time:329695] will take part [contest:329695].

  • The contest is carried out according to the IOI rules. You will be given from 5 to 10 tasks for 4 hours. An hour before the end of the round, the table will be frozen.
  • The tasks will vary greatly in complexity — from the simplest to the most complex.

  • The round is not rated!!!

  • You can use all materials, which are published before beginning of the round.

  • Tasks are in the order of the story, not difficulty!

The tasks are tested by Irpacci, High_Faev, Irsanik, Gareton, xyz..

Thanks MatesV13 for creating english statements!!!

Also thanks a lot MikeMirzayanov for systems Polygon and Codeforces and geranazavr555 for explaining various technical aspects!

I wish you luck on the round!

Upd: the round based on the anime "The Promised Neverland".

Upd2: Registration is opened!

Upd3: Editorial: https://codeforces.com/blog/entry/91605

Upd4: Congratulations!!!

Upd5: Finished doing diplomas. Link to them:

https://drive.google.com/drive/folders/1RsYBfLAxHlRndZ_m4_FCTG7pPBG2oRdL?usp=sharing

oleh1421

andr1y

TryMax

ILL1A

Anecstasiya

Link for registration:

https://codeforces.com/contestInvitation/85a130edb18aa879d81952e0a3427b6187f12fb3

If you are registered:

https://codeforces.com/contests/329695

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By try_kuhn, 21 month(s) ago, translation, In English

Hello, codeforces! I want to ask some questions about codeforces and polygon (I make tasks on polygon):

  1. Can I do so, that solutions, which fall on the first test, will not be counted in table?

  2. Can I add pretests and hacks to my contests?

  3. Can I add deferred publication to my blog (for example for editorial)?

  4. Can I somehow copy some contest so, that I would be able to edit condition?

  5. Can I add score for tasks?

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By try_kuhn, 21 month(s) ago, translation, In English

Today I wanted to create rating. A added all I need, saved and then I saw bug window on cf. Who had fixed it before?

I caught similar bug after rollback of correction in blog.

Rating: https://codeforces.com/group/rXA6oDkdyg/customrating/2626

Correction: https://codeforces.com/topic/90828

Ps: Ping geranazavr555.

UPD: second part was solved: I log out and then log in in account. First part is not solved yet.

UPD: first part is provlem with SPbSU contest on codeforces.

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