Comments

Thank you. I’ll try to investigate it.

Maybe you have some copy-paste from HTML. And HTML source of your question exceeded 1000?

On RipattiCroc Champ 2012 — Round 2, 4 weeks ago
0

I’ve sent email.

+2

Right. Also you may read Wikipedia about ACM-ICPC.

These problems are not supported in practice correctly for now. I’ve temporary removed them from the problem archive. Sorry.

On undefCodeforces Round #115, 5 weeks ago
+5

It is for onsite participants. You should register on Codeforces Round #115, it will contain exactly the same problemset.

They will be in Russian and English.

Great! Write Gerald.

Fixed, thanks

Fixed, thanks

Fixed, thank you

Fixed

I’ll give access to the solutions soon.

As usual X / 250 per minute, where X is the problem max. score.

Yep, you can.

No.

They are allowed, but you may have difficulties with registration and reading some additional materials (if any). Also I believe it is not easy (impossible?) to organize trip to Moscow in a week.

No :( It is a pilot Championship, but contestants have a chance to win money or Mac Books. Not too bad!

Yep, it is written.

+2

Please write me about cheaters if you see some (or just a suspiciously similar codes).

==

Пожалуйста, пишите мне личные сообщения, если видите читеров или просто подозрительно похожие коды.

On Burunduk2VK Cup 2012 Round 1, 2 months ago
+20

I’m sorry. Yes. It is just the result of wrong contest policy setup. It will not be such issue in the future. Sorry again.

Answered in personal talks (messages).

Yes, but you follow the rules 1-3.

This problem has a solution on Python consumed 60 ms and 3100 KB. I think it is possibly to solve it on Ruby. Anyway we do not guarantee that any problem has a solution on languages like Perl/PHP/Python/Ruby.

Because we found that sometimes this optimization makes code to be invalid.

Read the comments above

You should be registered to:

  1. the Championship
  2. the Contest

No

It is right

Yes, you can submit any problem many times.

Fixed, thanks.

Thanks! It is so hard to be attentive at 3 AM.

No, they will not be rated.

On SammarizeCodeforces Round 110, 3 months ago
+30

Sorry for delay, some technical problems around “Unable to parse” forced to move the start.

Fixed, thank you.

Thank you. It will be fixed.

The problem is that it is impossible to make such checking in frontend. Obviously, web server can’t run gcc -E so it is only possible to pass source code to the backend (judge, we called it contester) and it returns verdict something like Ignored and the reason.

For now I’ve improved the regex and we will implement checkbox like “Do not show me this warring”. I believe it will be enough.

Yep, regex is needed to be improved to handle the first case correctly. But the second case seems to be indistinguishable.

On MikeMirzayanovCormen Medal 2011, 3 months ago
+11

Great news! I’ve received congratulations to the winners from Thomas Cormen (thank you!). I’ve added it to the text.

+14

From the announcement:

Several additional coach accounts will be given out by us individually.

+11

There are two reasons:

  • technically we can place post to the title page only if it has a translation,
  • not ony citizens of Russia can read Russian, but also people from Belarus, Ukraine, Kazakhstan, Georgia, Latvia, Kyrgyzstan, Uzbekistan and many others often can (I’ve listed some countries from http://codeforces.com/ratings/countries), some of them prefer English version of the site but can read Russian.
On MikeMirzayanovCodeforces Markup, 4 months ago
+1

It works, see http://codeforces.ru/blog/entry/3780#comment-76662 Use the editor main menu to insert highlighted source code.

0

It seems it works:

for (int i = 0; i < n; i++) {
    printf("Works");
}

Just use main menu from the editor, we have a special syntax to highlight the code.

On paladin8Math in Blogs?, 4 months ago
+14

Fixed, thank you for the report.

It is a small bug. In future system will count attempt failed on the first test if the problem contains exactly one test.
No, only if you've solved the problem you can see others solutions.
Please, post here only bugs and feature requests.
Any contest on Codeforces::Gym will be unrated
Yep
It will be available as a virtual contest.
It will be soon, not as update but as a separate language for now. Also we have desire to use it in production. Do you have such experience?
On NALPCodeforces Round #101 (Div. 2), 4 months ago
+15

Process time is not a constant on any operation system, but it could vary a little. Typically 3-10% is acceptable accuracy. In particular on this all author solutions are 2-3 times faster than a time limit. Actually each contest we have some solutions which work around a time limit. Some of them pass system tests, some of them not. But anyway, writing such solution is a risk, because you can't get will it pass tests or not.

We do not rejudge such solutions, it would be unfair to other participants. We apologize for the inconvenience.

On vudduuACM ICPC Latin America 2011, 5 months ago
0
Great! Wating for them.
On vudduuACM ICPC Latin America 2011, 5 months ago
0
Are the solutions published anywhere? I found only tests but can't find the solutions :(
On NickolasCodeforces Beta Round #96, 5 months ago
0
use ((problem:133C)) (but replace round brackets to square) to get the link 133C - Turing Tape, look http://codeforces.com/blog/entry/2682
On NickolasCodeforces Beta Round #96, 5 months ago
+6
You have some array overflow or similar. So the solution has random behavior. Here are two consecutive invocations of the first solution:
Z:\Cop>1.exe < input.txt
4
Z:\Cop>1.exe < input.txt
35
On NickolasUnknown Language Round #4, 6 months ago
0
1. Read http://codeforces.com/blog/entry/2682 how to insert submission link properly;
2. It means your solution prints extra non-printable character(s). Try to run your solution localy. You may see that it prints extra-character with code 0 after "codeforces".
On islam-al-aaragJudgement failed., 6 months ago
0
Please, give the link to the submission.
On paladin8Z Algorithm, 6 months ago
0
Glad to see you here!
Yep, this problem could be solved using KMP. Moreover Z- and prefix-function are equivalent (one can  transform Z<->prefix in O(n)). But for me often it is easier to think in terms of Z-function to solve a problem.
No.
But you may shorten it. "You are allowed not to shorten the initial word if its length does not exceed four characters."
Now all the past contests are available as virtual contests.
===
Теперь все прошедшие соревнования доступны как виртуальные контесты.
On stostapView source, 8 months ago
0
It will be fixed soon.
On AtefCodeforces Beta Round #83, 9 months ago
0
It seems yes. It will be rated. If Java issue affected somebody for 10 minutes of more, we can make the contest unrated for him/her. This fact should be proved by submissions log.
===
Похоже, что да. Контест будет рейтинговым. Если на кого-то сильно повлияла эта проблема (10 минут и более), то для него мы можем сделать участие внеконкурсным. Этот факт должен быть доказан логом посылок.
On AtefCodeforces Beta Round #83, 9 months ago
0
Так как во время контеста были некоторые проблемы с тестированием решений на Java, то в этом контесте все успешные, но не последние посылки (на претесты) не приводят к дополнительному штрафу, а игнорируются. Еще раз приносим извинения за доставленное неудобство.
=
Since during the contest, there were some troubles with testing Java solutions, all "pretests passed" (except last) submissions do not decrease score, such submissions are ignored. Once again, we apologize for any inconvenience.
On RipattiCodeforces Beta Round #81, 9 months ago
0
Ratings are updated. Sorry for delay.
===
Рейтинг пересчитан. Приносим извинения за задержку.
On RipattiCodeforces Beta Round #81, 9 months ago
0
Due to technical reasons rating for participants of the Division 2 was not updated. Soon we will fix that and update ratings for all participants.
===
Из-за технических накладок рейтинг для участников второго дивизиона пересчитан не был. Скоро мы все поправим и сделаем пересчет для всех.
Please, remove exclamation marks from the title. Do not cry.
On amirali1374Unknown Language Round #3, 10 months ago
+8
Sorry, 10:00. It's my fault.
On EgorGoogle CodeJam World Finals, 10 months ago
0
Will results appear soon?
On goryinyichCodeforces Beta Round #78, 10 months ago
+29
I don't know what happened with your email, but will be really great to see your round on Codeforces. I'll ask RAD to ping you about it. Thank you.
I'm not sure that all Russian speakers are viewing the site in Russian.
It will be for typical Codeforces rounds, but not for tournaments.
Ignore this comment
I ran your solution in custom testing and it outputs "1" as mentioned in juding protocol.
I'll try to investigate this issue
Yep, I thought about it just few minutes before the contest. In future, we will not use division-separation on tournament rounds.
On HerumanProblemset, 12 months ago
+1
Because of expected increasing load during the "Yandex Open 2011 Qualification 1", we disabled some features of the system. It will be enabled just after the contest. Thank you for your understanding.
On Alex_KPRCodeforces Beta Round #69, 13 months ago
0
Да, дивизионы в разных комнатах
=
In this case we suppose that participants from the different divisions do not share rooms.
On Alex_KPRCodeforces Beta Round #69, 13 months ago
+162
Вместо голосований: поставьте здесь плюс, если вам не понравилась идея разделения участников по разным контестам в зависимости от дивизиона, а нравятся больше стандартные общие контесты.
====
Instead of poll: please click "I like" on this comment if you do not like an idea to split participants into two different contests depending of their division, and you like typical common contests more.
On Alex_KPRCodeforces Beta Round #69, 13 months ago
+305
Вместо голосований: поставьте здесь плюс, если вам понравилась идея разделения участников по разным контестам в зависимости от дивизиона.
====
Instead of poll: please click "I like" on this comment if you like an idea to split participants into two different contests depending of their division.
On MikeMirzayanovProblem Parser Contest, 13 months ago
+1
System testing competed. Tomorrow the contest winners will be announced!
===
Системное тестирование завершено. Завтра состоится подведение результатов!
On MikeMirzayanovProblem Parser Contest, 13 months ago
-3
It is Moscow Time (GMT +4).
On ashmelevCodeforces Beta Round #66, 13 months ago
0
No, any accepted solution remained accepted. I think some users which solution has been accepted after rejudge moved in front of you in the standings. You took 207th place, solved problems B and C and I think it is resonably that you loose some rating poins (-16).
On ashmelevCodeforces Beta Round #66, 13 months ago
+8
I has changed problem testdata. Now it contains an empty line in case of m=0. I rejudged submissions which was failed on tests (18, 21, 23, 28). Some of them passed system test. Sorry for this issue. It is one more minus for contest writers :(
On ashmelevCodeforces Beta Round #66, 13 months ago
0
As we know some people understood the problem correctly without clarification. Also, unfortunally, as I know the problem author wasn't around computer.

Petr, sorry again about this issue.
On ashmelevCodeforces Beta Round #66, 13 months ago
0
Appeal granted :) Sorry for the issue. I checked all the submissions failed on test#4 and found that your solution is unique which failed because of missing empty line.
On ashmelevCodeforces Beta Round #66, 13 months ago
0
I do not think anyone solution depends on last empty line. For example, as I see your first attempts was incorrect for n=0. Please, give me submission-id of your or anyone attemp that should pass test [n=0,two lines] but didn't pass [n=0 in the only line].
On ashmelevCodeforces Beta Round #66, 13 months ago
0
As I can see (please, fix me if I am wrong) the solutions for both statement meaning (before and after clarification) looks very similar and use same approaches. From the other hand, there were solutions only from two persons who passed pretest 1-4 which do not distinguish different understandings. The first test which has different answers for two understandings is 5. I repeat: only two participants made submissions which have WA on test 5.

After the clarification it looks it was not difficult to change the solution according new information. So, I believe that the issue in this problem is significantly affected only two persons. We ignored their attempts submitted before clarification and moved their OK solutions to the time of the first attempts.

Yes, possibly, it will be better to give a choice for participant in similar cases to decide if round should be unrated for them. But anyway it should be done before system testing.
On MikeMirzayanovProblem Parser Contest, 14 months ago
0
If you want to use problem archive to judge some solution(s) you should decide which checker to use. You should choose exactly one. In this case many things point that tester.dpr is preffered:
  • tester.dpr is Delphi source, while TESTER.PAS is Borland Pascal program;
  • there is binary file tester.exe in the files.lst and it has name in lowercase like tester.dpr;
  • tester.exe is win32-executable
On MikeMirzayanovProblem Parser Contest, 14 months ago
0
11th-30th
On MikeMirzayanovProblem Parser Contest, 14 months ago
+3
Yes, paths in answer should be subset of paths in files.lst.
On MikeMirzayanovProblem Parser Contest, 14 months ago
+1
Yes, we prepared a testdata manually and did a mistake. File files.lst in the test 4 is wrong. It will be fixed today. Thank you.
On TachyonManthan 2011, 14 months ago
+12
Because of unusual registration process we have some small issue that some users registered twice on the contest. If you see such cases, please, write here I'll fix them. Thank you.
===
По причине нетипичной регистрации есть какие-то баги, которые проявляются так, что некоторые пользователи зарегистрировались на контест более одного раза. Если вы увидите такие случаи, напишите сюда. Спасибо.
On TachyonManthan 2011, 14 months ago
0
Yep, just after ~30 minutes after the contest
On ahmed_alyAbout Manthan 2011, 14 months ago
+13
The current plan - yes, it will be rated. Official Codefest participants will take part in this contest officially, while non-Codefest participant will take part unofficially (out of competition, with asterisk before handle). But we will recalculate ratings for both types of participants using the combined standings table.
On zgwno Presentation Error?, 14 months ago
+12
There is no "Presentation Error" verdict here, please read http://codeforces.ru/blog/entry/1028
Fixed, thank you.
On Alex_KPRCodeforces Beta Round #58, 15 months ago
+15
Ratings have been updated.
On Alex_KPRCodeforces Beta Round #58, 15 months ago
+8
No, it would be unfair for those who voted before