By Gerald45 hours ago, translation, In English,

Good evening!

The final contest of Coder-Strike 2014 will be started tomorrow at 16:00 MSK. The problems (as in previous Coder-Strike 2014 rounds) are prepared by: Gerald, HolkinPV, Igor_Kudryashov.

And we have good news for you. There are two rated online rounds related to the contest: one round for the first division participants and the other for the second division participants. Of course, we've added simple problems in the second division contest (and also deleted hard problems).

The registration for the contest will start at 4:00 MSK, as usual registration ends 5 minutes before the contest start. The first division participants should register on "Coder-Strike 2014 — Finals (online edition, Div. 1)", the second division participants should register on "Coder-Strike 2014 — Finals (online edition, Div. 2)".

Hope the problems will be nice for you, we are really tried our best to prepare them.

Good luck!

UPD. Due to the holding the onsite competition of Coder-Strike 2014, we have to restrict access to the site after the contest. Approximately, the site will be unavailable for 15-30 minutes after the end of the contest.

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By Gerald4 days ago, translation, In English,

Good day!

Coder-Strike 2014: Round 2 will start tomorrow at Russian morning. If you want to participate, please register for the contest on the page.

In much the same way as the first round, all users can take part in the competition. But this round will be usual rated round only for the second division participants. The first division participants can take part too, but for them the round will be unrated. Please, do not get upset, the next Coder-Strike round (finals) will be rated round for the first division participants.

If you have any additional questions, please, ask at comments.

Good luck, and see you on the contest!

UPD 1. Sorry for delay, the score distribution is standard.

UPD 2. The contest is over, congratulations to the winners, hope you like the problems!

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Announcement of Coder-Strike 2014 - Round 2
 
 
 
 
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By Gerald5 days ago, translation, In English,

Good Day!

Coder-Strike 2014: Round 1 will start very soon. If you want to participate, please register for the contest on page. The round was prepared by me, HolkinPV and Igor_Kudryashov. And we tried our best to make it really awesome.

The round will be usual rated round for the second division participants. The first division participants can take part too, but for them the round will be unrated.

If you have any additional questions, please, ask at comments.

Hope you enjoy the problems! Good luck!

UPD 1. Score distribution will be standard: 500-1000-1500-2000-2500.

UPD 2. The competition was delayed by 10 minutes. :]

UPD 3. Because of unusual room assignment Div.1 and Div.2 participants will be in the same rooms this round.

UPD 4. The contest has ended, hope you like the problems. Rating for Div.2 participants will be updated a bit later.

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Announcement of Coder-Strike 2014 - Round 1
 
 
 
 
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By andrewzta10 days ago, translation, In English,

Russian Code Cup is a competition organized by Mail.Ru Group for Russian-speaking programmers. This year the competition will run for the fourth time to gather top 50 to great finals in Moscow in October.

Though Russian Code Cup is open only for those who speak Russian, the team that is working on problems for Russian Code Cup has decided to make a present to all CodeForces users and set up an extra round for everyone.

The round will be held on April 17 at 19-30 Moscow time. The round will be open for everyone and will have both div-1 and div-2 tasks. It will use standard CodeForces rules. The writer of most problems is Aksenov239 — author of many Russian Code Cup problems.

We wish all participants good luck and see you on Thursday at http://codeforces.com

UPD: Score for problems: Div1: 500-1000-1500-2500-2500, Div2: 500-1000-1500-2000-2500. Good luck!

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By Gerald9 days ago, translation, In English,

Good day!

Codeforces will hold competition Coder-Strike 2014 for Moscow school children. Qualification Round of the competition will start soon. The round will be unrated for all participants.

As usually, anyone can enjoy the problems! If you aren't a Moscow school child you can take part in the round unofficially.

Hope you will enjoy our problems, good luck!

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By MikeMirzayanov11 days ago, translation, In English,

The round will start on 08:00 (UTC) of April, 13. It will be a kind of unusual round because at first for a long time Gerald didn't work much on round. It was prepared by me (how it is interesting to write a round!), Nerevar with the help of Gerald and Fefer_Ivan-а. Maria, many thanks for translations!

It will be classical points: 500 — 1000 — 1500 — 2000 — 2500.

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By matrix3 weeks ago, In English,

Hi everybody!

Codeforces round #240 will take place tomorrow 19:30 MSK

This is our first round in Codeforces and we hope that everything will be fine. The problems were prepared by Amir Keivan Mohtashami(matrix), Farbod Yadegarian(FarbodY) and Gerald Agapov(Gerald). Also special thanks to Mohammad Amin Khashkhashi Moghaddam(alex-mercer) for testing this round.

I want to also thank MikeMirzayanov for Polygon and Codeforces systems, and also Maria Belova(delinur) for translating the statements.

We wish you a good and challenging round.

Have fun!

Score distribution:

div1: 500 — 1000 — 1500 — 1500 — 2500

div2: 500 — 1000 — 1500 — 2000 — 2500 (standard)

UPD: due to technical reasons the round was delayed for 10 minutes. We apologize for any inconvenience caused.

UPD2: Congratulations to the winners!

Div 1:

  1. louise

  2. sankear (The only one who solved problem E during the contest. Congratulations!)

  3. Egor

  4. qwerty787788

  5. hos.lyric

Div 2:

  1. jzzhu

  2. SJTU_WengJian

  3. alcot

  4. LoveEvita

  5. huyifei

  6. NiuYiqiang

UPD3: The round analysis are prepared by DmitriyH. You can find them here.

Also the tutorial is not completely ready yet. But you can find some notes about some of the problems here. I'll try to complete it as soon as possible.

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By MikeMirzayanov3 weeks ago, translation, In English,

Hi!

I think everybody can remember a case when

Probably everyone remembers in practice a case when after implementation of correct algorithm you receive Wrong Answer. In such a situation, sometimes works: to send solution on another compiler.

Gerald and Nerevar have found severe bug, which gives one more argument to use the rule above.

Look closely, now it will be a miracle! 

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Tags bug, g++
 
 
 
 
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