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By Michael, 13 years ago, translation, In English

Congratulations to Petr Mitrichev (Petr), the Yandex.Algorithm 2011 Champion!

Congratulations also to Dmitry Dzhulgakov (dzhulgakov), Makoto Soejima (rng_58), Ivan Metelsky (ivan.metelsky), Alexey Levin (levlam) and Gennady Korotkevitch (tourist) who placed 2, 3, 4, 5 and 6 respectively! They solved as many problems as the champion. Full results are available here

Problems turned out to be really difficult: nobody managed to solve more than 3 problems during the 2 hours of competition. Problem A was considered much simpler than all others by the contest authors, but less than half of participants could solve it, and even the champion lacked 30 seconds to fix the last bug. Only one coder could solve problem E: Xhark from Korea.

Problem E was suggested by Ilya Kornakov (ilyakor) who is also a developer in my group at Yandex :) Problem A about domino and a guy named Gena was powered by Ivan Popelyshev (ivan.popelyshev). Problem B — Stanislav Pak, C — Denis Yarets. All three are also our employees. Problem D was suggested by Artem Ripatti. My problem was rejected at the last minute, so it will wait for you at the Petrozavodsk training camp :)

Thanks to all finalists, authors, participants out of competition, contest organizers, MIPT for the accomodations and the main sponsor — Yandex.

Good luck to everybody who competes in the OpenCup onsite today!


A few more photos from the competition:

Petr and our foreign guests rng_58, wata and dolphinigle
ivan.metelsky, MikeMirzayanov and pieguy

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By Michael, 13 years ago, translation, In English

Hi everybody!

Yandex.Algorithm finalists were gathering in Dolgoprudny... Everybody in their own unique way :)

dzhulgakov, pieguy, levlam and Progger turned out to be the most organized and arrived at the start of the Summer School. They've already socialized with other participants and began solving and competing in the practical bioinformatics problem using a distributed Hadoop cluster accessible for all school participants — good for them! Two Japanese buddies rng_58 and wata landed at Sheremetyevo airport on July 13 at 17.55, and an hour later they were already receiving their badges from me. Their fellow-countryman LayCurse mixed up the dates and took the tickets for the same flight but for July 14 :) tourist with his father came in the morning on July 14th, and dolphinigle landed yesterday late in the evening and told me I was the first man in Russia he met who spoke English :) ivan.metelsky "burst" into the room of the School organizers sleeping after yesterday's party at 8 AM; he got there himself without any instructions :) e-maxx arrived at Moscow by train at 10.38 in the morning and made his way directly to the competition with our other friends from Saratov - with some adventures on the way: the electric trains to Dolgoprudny have a break from 11.10 till 13.40. ktuan decided last minute that he won't spend his last univercity vacation for the finals, and Burunduk1 seems to have been too busy with teaching high school students and didn't answer my e-mails and phone calls (tut-tut, Sergey!) — I wonder whether he will be coming last minute. Petr will drive here from Moscow just before lunch. My intern zeliboba studies at MIPT and lives in the same building where all the other participants of the Summer School, so he'll probably come to the contest floor last :)

Everybody can register and participate in the round as usual. Those who don't participate in the onsite round will be out of competition, but the round is rated for everybody in Div-1.

I remind you that the contest time is unusual today: we will start at 16.00 The problems are harder than usual in Div-1 today — looking forward to a bitter struggle!

Update: full results

A few photos from the School's life starring our finalists Progger и pieguy:

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By witua, 13 years ago, translation, In English
Hello everyone!

Welcome to Codeforces Beta Round #77. I am Vitaliy Gerasimov (witua) and I am an author of today's problems. Thanks to Artem Rakhov (RAD) and Pavel Kuznetsov (it4.kp) for the help and advices in preparing of the rounds, Maria Belova (Delinur) for the problem translation and Codeforces (CF) for being.


Good luck!

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By dalex, 13 years ago, In English

Hi all!

My name is Alexey Dergunov, and I'm glad to present you the first "violet" Codeforces round. I hope the problems will not seem so "violet" to you :)

Many thanks to following people who helped me a lot with contest preparation:

Good luck!

UPD. Contest is over, and we know the winners!

Division 1:
Division 2:
Congratulations!

UPD 2. Analysis: http://mirror.codeforces.com/blog/entry/2208 (English version is not full yet...)

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By Connector, 13 years ago, translation, In English

Hello everyone.

Today I am an author of the contest. This round is for both divisions. There will be five problems in each division. This is my second round on the Codeforces. The actors in this contest will be walruses again =)

I want to thank Codeforces and Alias for helping me to prepare the round.

Good luck!

UPD1:

Points for problems in div1: 500-1000-1500-2500-2500

Points for problems in div2: 500-1000-1500-2000-2500

Analysis 

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By Ripatti, 13 years ago, translation, In English

Hello everyone!

I am an author of problems of today round. This round is for both divisions. There will be 7 problems, the first 5 of them are for the second division and the last 5 are for the first one.

About points of problems. Today they are nonstandard:
for div2: 500-1000-1500-2000-2000
for div1: 500-1000-1000-1500-2500
Be careful.

RAD helped me for preparing the round. Delinur translated statements into English.

Good luck ans have fun.

UPD.
 winners of the first division
1. peter50216
2. tourist
3. ACRush

winners of the second division
1. iamcs1983
2. zyx3d
3. seanwupi

Editorial.

UPD.
Unfortunately, in author's solution of priblem E some bug was found. We thanks participant LinesPrower for detection of it. Author's solution was updated and all solutions were rejudjed. Ratings will be recalculated for all participants excluding Egor and Jacob. We apologize for this incident.

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By MikeMirzayanov, 13 years ago, translation, In English

The first information letter


General information


From 1nd to 11th August 2011 Saratov State University runs an international student summer school in computer programming. Teams of three people and individual participants are invited to take part in it.

The school will take place in a picturesque place at one of Saratov resort centers on the Volga bank. The participants will be provided comfortable rooms for 2-4 people and meals three times a day. The resort center owns a beach and sport grounds.

It will be 10 training days. The school includes lectures by Saratov state university coaches, joint trainings, problems tutorials and topical workshops. The curriculum is designed for younger university students who aspire to achieve high results at programming competitions. Official language — Russian.

The fees are 16000 RUR (~ 570 USD) for a person. Moreover, each team or an individual participant should bring a laptop with the support of WI-FI.

All interested participants and teams should register at http://acm.sgu.ru/sazanka-2011/ till 20th June 2011. Don't postpone the registration, as the number of participants we can take is limited.

You can get additional information by e-mail mirzayanovmr[symbol-at]gmail.com. As since the official language of the school is Russian, the registration requires knowledge of Russian. Also it is recommended to view this page in Russian.

About Saratov State University

Saratov State University, regularly achieves significant advances in programming competitions. The following are the main achievements of the university in international competitions:

  • 2002 ACM-ICPC World Finals silver medals, Europian Champions
  • 2003 ACM-ICPC World Finals silver medals
  • 2006 ACM-ICPC World Finals golden medals, Europian Champions, World Champions
  • 2007 ACM-ICPC World Finals silver medals
  • 2009 ACM-ICPC World Finals golden medals
  • 2010 ACM-ICPC World Finals silver medals
  • 2011 ACM-ICPC World Finals silver medals
Mike Mirzayanov,
Saratov State University

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By PavelKunyavskiy, 14 years ago, translation, In English
Hello everybody and welcome to the first summer round - Codeforces Beta Round #73.

Today we are the authors of round: kuniavski (Pavel Kunyavskiy) and Zlobober (Max Akhmedov). Competition will take place in both divisions. Totally there will be 7 different problems with variations in divisions, 5 in each division. We hope everybody shows their best and solve as many problem as they can.

Thanks to RAD (Artem Rakhov) for the help and advices in preparing of the round,  Delinur (Maria Belova) for the problem translation and  MikeMirzayanov (Michael Mirzayanov) for such a great site.

GL & HF!


Tutorials: div1,div2

Congratulations to the winners

Div1 - ilyakor 
Div2 - peter50216

Some statistics. First sucsessful submits and hacks:

Div1-A Dmitry_Egorov 4:09
Div1-B ilyakor 13:05
Div1-C A_A_Lunyov 8:05
Div1-D hos.lyric 30:57
Div1-E rng_58 75:20
hack VArtem 26:15

Div2-A epizend 5:27
Div2-B random.johnnyh 19:15:29
Div2-C RomaFurko 11:31
Div2-D peter50216  41:18
Div2-E peter50216 54:00
hack  diogen 55:33

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By MikeMirzayanov, 14 years ago, translation, In English

Hello!

I remind you that tomorrow will be ACM-ICPC World Finals Contest which will begin at 13:00 (UTC). The live results probably will be available by the links: http://zibada.ru/finals/ or http://icpc.baylor.edu/.

Watch! Ail! Share your impressions!

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By MikeMirzayanov, 14 years ago, translation, In English

On May, 25 in the evening we attended a dinner show called "Treasure Tavern". Dinner combined with show is a rather popular entertainment format here. There were several variants and we chose this as the least childish one. In fact, the show combined elements of a stand-up comedy, a musical and a circus. It all was spiced up with the entourage of a kind of a cabaret tavern with waitresses in short dresses. However, apart from a dosen of vulgar jokes the tavern theme didn't develop. During the show we didn't understand lots of stuff, but the artists' performance was on the top level. We were impressed by a dancing couple, where the woman was sometimes hidden for literally a second behind a special curtain and the next moment she appeared in a new garment. The gymnasts' performance was also on the top level. We weren't particularly impressed by the food, but on the plus side, it was the first time I've tasted meat with blood and I liked it. On our way home Artem even went to Burger King (I understand him).


The performers tried to make a superstar out of Kolya but he refused

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