By MikeMirzayanov, 7 years ago, translation, In English,

School Team Contest #3 (Winter Computer School 2010/11) will be held on November 13 at 11:00 (UTC). This is the final team event of the series, and we will be glad to see both permanent participants and new teams.

The contest has been prepared by me, Artem Rakhov, Nikolay Kuznetsov and Ivan Fefer. All of us will soon go the ACM-ICPC regionals in St. Petersburg, and now the guys have to combine the preparations for the semifinals with writing problems for you. Special thanks for the translation of problems to Maria Belova.

Everyone can take part in it out of the competition (informal). Make up your mind :)

We decided to sum up contest results using the ITMO rating system, according to which team gets a score from 0 to 200 per contest. It will be used two best participations out of thee possible. I will not reveal secrets, saying that Gennady Korotkevich showed great results and secured the victory ahead of schedule!

Good luck in the upcoming competition, MikeMirzayanov and stern, but fair jury.

UPD. Statements in PDF: russian version and english version. The statements will be available when the contest starts. 

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By MikeMirzayanov, 7 years ago, translation, In English,
Hi, everybody!

Welcome to the  "Codeforces Beta Round #40 (Div. 2)". Let the weather cloudy (at least in Saratov), and the round began with the unavailability of the server (we apologize for a fail), but I hope the tasks will bring you pleasure.

Wish you high ratings,
MikeMirzayanov

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By natalia, 7 years ago, In English,
Good day to everybody!

I am glad to invite you to participate in the next round of the series of winter programming school olympiads, that will be held on the 6th of November at 14:00 MSK.

The contest is official for school teams, and unofficial and not rated for everyone else. Remember, that if you have a school team, you must register all the participants for the series, if you haven't done it yet.

The duration of the contest will be 5 hours, and the rules are standard ACM ICPC.

The problems were prepared by me, Dmitry Matov, Polina Bondarenko, Mikhail Mirzayanov, and also by Maria Belova, who translate them to English. We all hope that the contest will be interesting for you to participate.

Good luck!

UPD. Statements in PDF: russian version and english version. The statements will be available when the contest starts. 

The contest is over. The winner is Gennady Korotkevich who solved 9 problems for less than 3 hours. Results are available. 

Tutorial:

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By Seyaua, 7 years ago, translation, In English,
I invite you all to take part in the next Codeforces round!

This time the problems are written by me and sdya. Some information about us: we both are second year students of The Faculty of Mechanics and Mathematics of Kharkiv National University named after V.N. Karazin, and we are twin brothers. We began studying programming in the 10th form, about 2.5 years ago. We do not have any significant achievements in programming competitions yet, but we hope we still have time to get some :)

We would like to express our gratitude to Artem Rakhov who helped us to arrange this contest, and to Maria Belova who has translated the problems statements into English.

We wish good luck to everyone and hope you will find the problems interesting!

UPD: The contest is over, congratulate tourist, who won this round.

Link to results.

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Announcement of Codeforces Beta Round #39
 
 
 
 
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By MikeMirzayanov, 7 years ago, translation, In English,

Good day!

We are pleased to inform you that on the night of December 31, 2010 on January 1, 2011 will be not only fireworks, champagne, gifts and presents, but we will summarize the Codeforces year. Great news that Thomas Cormen gave permission to use his name in Codeforces annual award. So, we are pleased to announce the annual Codeforces award — the Cormen Medal!

It will be three awards this year:

The first of the medals will be awarded to participant who will have the highest rating at the end of the year. The second medal will be presented to the best participant of Winter Programming School Olympiads for Schoolchildred 2010/2011. Finally, the third prize will get the most active and successful author of problems for Codeforces competitions (Codeforces team members not considered in the tabulation of results).

Wish you high ratings,,
MikeMirzayanov and Codeforces team

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By NALP, 7 years ago, translation, In English,
Hello everybody.

I would like to invite you to participate in a new competition, that will be held on the 30th of October at 16:00 MSK. It will be a part of the series of winter programming school olympiads, but it will be only a standart Codeforces round for adult participants.

Teams aren't invited, only single members. The official rules will be ACM-ICPC.
Jury has decided to increase the duration of the competition, which will be 4 hours long.

Attention: People, who are considered out of competition, are participants of Codeforces Round #38, others are participants of School Personal Contest #1. But we will use merged result table for updating rating.


The authors are me, Mike Mirzayanov and Artem Rakhov. Also I'm expressing gratitude to Maria Belova, Max Ivanov and Natalia Bondarenko for help.

P.S. Please, don't forget to register to the competition!

UPD: The contest has finished, thanks to all. I hope, you have got fun :)

Congratulations to tourist. It tooks him ~2 hours to solve all problems!

The next official school contest will be on November, 6, at 14.00 MSK

Total number of participants is 788, 274 of them have taken part in the school competition.

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By vepifanov, 7 years ago, translation, In English,
Good evening!

Today I am the author of problems. I'm studying in Nizhny Novgorod State University (2 year, Mechanics and Mathematics). I want to thank the staff codeforces for assistance in preparing the contest, and, personally, Artem Rakhov and Maria Belova (for translations of problems into English). Also special thanks to Alexei Shmelev (NNSU) for writing alternative solutions.

P.S. Unfortunately, this round could be in error to register a team. For teams participating in this round will be counted "out of competition", ie, rating of participants does not change. If you register a team by mistake, you can unregister and register in person.

UPD: After the contest start, it will be available PDF-versions of the statements:
UPD: The contest is over, congratulate Ivan Popelyshev, who won this round. He was the only one who has successfully solved all five problems.

Link to results.


UPD: Tutorials are available.

Regards,
Vladislav Yepifanov.
Прослушать
На латинице

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Announcement of Codeforces Beta Round #37
 
 
 
 
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By natalia, 7 years ago, In English,
Good day to everybody!

Welcome to School Team Contest #1 that will be held on the 24th of October at 11:00 MSK. The contest will be official for school teams as a part of the series of winter programming school olympiads (http://codeforces.ru/blog/entry/753), and it will be informal (and not rated!) contest for everyone else.

To compete officially, each participant of a school team must at first register personally, then you must create a team of registered participants, and when registration to the contest opens, you must register your team there too.

I hope that the problems will be interesting for school students with different level of programming skills, and not only for school students! Pay attention to some differences from usual Codeforces contests. First, the duration of the contest is 5 hours, and there will be standard ACM rules. Second, problems will not be sorted in increasing order by their complexity, they will be shuffled. So your first problem for you is to find an easy problem :)

The authors of the problems are Mikhail Mirzayanov and me. Thanks to Gerald Agapov, Polina Bondarenko and Artem Rakhov, who helped me to prepare the round. Also thanks to Maria Belova for translating problem statements into English. We all are from Saratov State University.

Good luck!
 
UPD: After the contest start, it will be available PDF-versions of the statements:
UPD: The contest is over. The results are available. The winner in both official and non-official standings is Gennady Korotkevich, who has solved all the problems. Congratulations to the winner! The problem analysis is available.

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By MikeMirzayanov, 7 years ago, translation, In English,

Hello.

Now you can create teams and invite other users Codeforces. I remind you that the first distance Winter Computer School Olympiad will be for teams, and for official participation in it only teams will be allowed (all team members should be registered to the serie).

P.S. It is only the first version of the teams interface. We are working on extending it. Suggestions are welcome.

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By Nerevar, 7 years ago, translation, In English,

Greetings to everybody.

Today is an unusual day on Codeforces: two contests a day with quite small gap between them. The reason is that today the IX Regional team school programming contest is held in Saratov, and it was decided to use the tasks from it for Codeforces rounds.

That's why there are many authors of today's tasks. I would like to thank the whole jury of the school contest for their excellent job. The following people are on the jury: Artem Rakhov, Nickolay Kuznetsov, Natalia Bondarenko, Gerald Agapov, Polina Bondarenko, Ivan Fefer, Edvard Davtyan, Igor Kudryashov, Pavel Kholkin and me. I believe that you know all these people as Codeforces problemsetters.

Let me draw your attention to the fact that today all problems have file IO. But generators for the hacks should output to stdout as usual.

Special thanks to Maria Belova and Julia Satushina for translating problem statements into English.

Good luck at the contests!

UPD: Results of the 35th round. We congratulate the winner, Naginchik, on his impressive debut!

UPD: Results of the 36th round.

Links to problem tutorials: A, B, C, D, E.

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Announcement of Codeforces Beta Round #36
 
 
 
 
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