By Connector, 7 years ago, translation, In English,
I'm glad to see you on Codeforces Beta Round # 64.

Today I am the author of the tasks. I'm a student of Tyumen State University.

I want to thank all those who helped me to prepare the round: Nikita Durynin (Austeritas) for the pair ideas for the tasks, Dmitry Bochkarev (Walrus) and Chernenkov Alexey (Laise) for the testing, Artem Rakhov (RAD) for coordinating the activities, Maria Belova for translating and Mike Mirzayanov (MikeMirzayanov) for a great system.

Today you will visit the Walrusland and help the common citizens and government to solve their problems.

Good luck for everybody, let the best man win!

Winner is Petr. Congratulations!

Analysis

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Announcement of Codeforces Beta Round #64
 
 
 
 
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By map, 7 years ago, translation, In English,

Hello!

Today I am the author of all tasks. At the contest you will be asked to help students from Chelyabinsk in solving their non-trivial problems.

I want to thank all those who helped me to prepare the round: Anton Garder for his invaluable assistance in the preparation of sets of tasks, Demid Kucherenko for assistance in the preparation of conditions, Artem Rakhov for coordinating the activities and patience J, Maria Belova for translating and  Mike Mirzayanov for a great system.

 Good luck!

Winner - Solo

Analysis - http://codeforces.com/blog/entry/1571

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By A.K.Goharshady, 7 years ago, In English,

Hi all!

Unknown language round #1 was up, 21st of February and now we're going to hold yet another Unknown language round.

It will be the usual ACM-ICPC unrated contest , so there is no hacking! The only feature - you will be able to submit problems using the only one, not very popular language. What? It's a secret! And I expect you'll have to learn the language at the time of contest since the used language will be a secret until ~1 minute before the start of contest.

Problem setters of this round are Alireza FarhadiSaeed IlchiSajjad GhahramanpourZahra Rohanifar and Me. We are extremely grateful to Mike Mirzayanov and Artem Rakhov.

Number of problems will be more than usual and the problems concentrate on coding abilities rather than algorithmic view and problem solving techniques.

UPD:The contest is over

Congratulations to the top 3 winners who solved all problems:

Wrong

tomek

watashi


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Announcement of Unknown Language Round #2
 
 
 
 
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By maksay, 7 years ago, translation, In English,
Hi everybody!

Today authors are me and Roman Iedemskyi (Shtrix). Big thanks for help in preparing problems to our teammate Iaroslav Tverdohklib, Artem Rakhov, Maria Belova and Dmitry Matov.

Hope you will enjoy the contest!

UPD: Congratulations to winner rng_58!

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Announcement of Codeforces Beta Round #62
 
 
 
 
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By Tachyon, 7 years ago, In English,
CodeFest'11, the annual online international coding festival of Computer Engineering Society IT-BHU, presents Manthan - the algorithm intensive programming contest. The name Manthan or मंथन has been taken from the Hindi language and means Brainstorming. Google Logo CodeFest Logo

The contest aims to provide a platform for programmers round the globe to showcase their problem-solving and programming skills. Most problems of the event will be real life computing problems where coders will be required to prune existing standard algorithms to find the solution for the domain specific application of the algorithm.

We are proud to have Codeforces as our partner for Manthan 2011. The Contest will be hosted on Codeforces and will follow the rules similar to that of Codeforces Beta Round.

Google Sponsored event with Prizes worth 50,000 INR. Besides, Certificates to top 50 participants. 

You need to follow the registration procedure in order to be eligible for prizes.

Event Details:
  • The main event is scheduled on March 13 at 2200 Hrs IST (UTC+5:30)
  • Rules of contest similar to Codeforces Beta Rounds.
  • The Contest will be of 3 hours consisting of 5-6 problems.
  • Programing languages allowed: C, C++ , Pascal, Java, C#, Python, Ruby, PHP, F# and Haskell.
  • Open to all, students as well as professionals.
  • Declaration of Results on March 16 at 1800 Hrs IST.
Note: Contest duration has been reduced from 4 to 3 hours.

Visit the Manthan event page for further details of the contest.

Registration for the competition will occur automatically on the fact of your registration on the official CodeFest site. If you have been properly registered there, then your Codeforces handle should appear in the list on http://codefest.org.in/codeforces-handles.php, and registration for the contest will take place
automatically.

The contest duration changed to be 3 hours. Good luck!

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Announcement of Manthan 2011
 
 
 
 
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By OSt, 7 years ago, translation, In English,

I congratulate all with 8th of March!

 Dear girls! Warmly we congratulate you on this remarkable holiday. You are the best that are in our life. Thanks you for all. 

Forever modest, meek in bearing,
As gay as morning's rosy dress,
Like any poet — open, caring,
As sweet as love's own soft caress.

Alexander Pushkin

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By Seyaua, 7 years ago, translation, In English,
Hello!

I invite you all to take part in significant round! Today will be the first round for second division in Codeforces history, when it will be rated for blue coders!

This time the problems are written by me and sdya
We thank Artem Rakhov, Maria Belova and Dmitry Matov for help in preparing of this round.

Good luck for all!

UPD #1: Congrats to Kepnu4, who won the second division and to cerealguy, who won this round!

UPD #2: Link to editorial.

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

Last night I don’t want to sleep, so – I was working. I reread my old post "Contribution 2.0" (in Russian) and decided to implement some ideas. Taking into account the comments that everyone (no matter the color nor the position in the contribution) has the right to express their opinions in the form of pluses or minuses, I did not restrict users the opportunity to express opinion.

On the other hand, the rules of contribution changing depending on your votes have modified. Since we have already appeared bots, trolls and other vermin, I will not reveal details, but note that:

  • Contribution may change after some time after the processing of your vote - it is normal.
  • Not all your votes may be taken into account when calculating the contribution changing - this is also normal, we will defend ourselves from dirty tricks.
  • contribution slightly scaled - the numbers got bigger. Maybe it's nicer?

Just want to say that the bots usage, following the principles of "blood feuds," etc. serve as a reason for your disqualification. Do not tempt fate.

Soon, the problems coordinator, the user RAD will leave official lists of both contributions and rated, as he is active member of the Codeforces team.

I wish you high contribution
MikeMirzayanov

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By natalia, 7 years ago, translation, In English,
I'm glad to invite everybody to take part in the current round.

Today the problems' author is me. I with Artem Rakhov, Maria Belova and Dmitry Matov have tried  to do everything possible to make problems more reliable.

I hope that the problems will be interesing for you, the contest will be dinamical, and stronger competitors will cope with the problems quickly to help newcomers to catch all bugs by their hacks :)

Good luck!

P.S. The phrase "stronger competitors will cope with the problems quickly" in no way means that all the problems will be easy. Don't forget to read statements and to test your solutions!

UPD. The contest is over. Congratulations to the winner - Kenny_HORROR

UPD2. Tutorial is added. In spite of the record number of participants the system has been working stable during the round. Thanks to Codeforces team! Also thanks to everyone who took part in the round.

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Announcement of Codeforces Beta Round #60
 
 
 
 
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By MikeMirzayanov, 7 years ago, translation, In English,
After analyzing the Division 2 rounds results and the difficulty of the problems, we decided to expand it Division 2 and to include the "blue" participants. Thus, the second division will consist of members with a rating from 0 to 1649. 

This is primarily due to the fact that I think the problems from the second division rounds are interesting and useful to the "blue" participants. At these competitions, we often give training problems on common themes of sports programming.  In addition, it is seen that in order to be blue enough to solve 1-2 problems on the first division competitions. This leads to the fact that such members do not increase their skills. 

Note that we are considering the possibility to divide "yellow" the participants into two colors, since this group is very huge and contains members of widely differing skills and abilities. 

UPD. The yellow group was separated into two groups: violet and orange. It is testing period now, some more changes are possible. Rating graphs will be updated tomorrow.

Wish high ratings,
MikeMirzayanov

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