htoj's blog

By htoj, 5 months ago, In English,

Hi Codeforces!

This is the editorial of Codeforces Round #482 (Div. 2). I hope you guys enjoy it.

979A - Pizza, Pizza, Pizza!!!

Solution
Code

979B - Treasure Hunt

Solution
Code

979C - Kuro and Walking Route

Solution
Code

979D - Kuro and GCD and XOR and SUM

Solution
Code

979E - Kuro and Topological Parity

Solution
Code

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By htoj, 5 months ago, In English,

We're really sorry for the inconvenience in the contest Codeforces Round #482 (Div. 2) today.

It is our fault that the statements, especially the statement of the B problem, were absolutely ambiguous. I understand that many of you are frustrated, angry or even hate the contest. Moreover, we want to apologize for the weak pretests on problem A and B. We intended the problems to have many corner cases, yet failed to include those corner cases in the pretest.

We have been waiting for a really long time to present to you our creations, to make the community happy. But instead, what we just did was such a mess.

As the last words, we are really thankful for joining our contest, and we also apologize for all the mistakes that we've made during the preparation of the contest.

Please take this apology with an open mind.

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By htoj, 5 months ago, In English,

Hi Codeforces!

Sorry for being late for the announcement.

I'm glad to introduce to you my first contest Codeforces Round #482 (Div. 2). It will take place on May/14/2018 17:35 (Moscow time).

You will have 5 problems and 2 hours to solve them.

The problems were prepared by me (Quyen Dinh), _Kuroni_ (Trung Dang) and _Shirone_ (Lam Le) with suggestions from FallingStar1709 (Nhat Hoang) and HaiDang2001VN (Dang Huynh). I would like to thank KAN for his great help in checking the problems and giving comments, Tommyr7 for testing all the problems and MikeMirzayanov for the awesome Codeforces and Polygon platform.

Note that the round is rated for everyone with rating below 2100.

In this contest, you will meet Kuro, Shiro and Katie, the three naughty but smart cats who love asking thought-provoking questions. I hope you will find our problems interesting. Good luck to you all!

UPD: Also big thanks to cyand1317 for helping us with the problems and arsor for translating the problems into Russian. Sorry, I forgot you guys.

UPD2: The scoring distribution is 500 — 1000 — 1250 — 1750 — 2250. Have fun!

UPD3: Congratulations to the winners!

Div. 1 & Div. 2:

  1. dotorya

  2. mama_budra

  3. coach.31

  4. nuip

  5. kevinsogo

Our top 5 solved all the problems. Awesome!

Official:

  1. mama_budra (solved all problems!)

  2. coach.31 (solved all problems!)

  3. Illidan

  4. ranwen

  5. iloveUtaha

Thanks for everything! Here is the editorial.

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