April 18, 18:00 (UTC) the second Wild-card round of VK Cup 2015 will take place.
Participants are invited to achieve progress in solving an unusual problem. VK Cup teams which were advanced to the Round 2 (and didn't advance to the Round 3) will take part in VK Cup 2015 - Wild Card Round 2 officially. In addition, this round will be open to the public for unofficial participation for everybody. Registration will be open for the whole round duration.
The round will be one week long. After the end latest submission (with positive score) of each participant will be judged on system tests.
Good luck!
UPD.: System testing is done. Final tests are available by link: http://assets.codeforces.com/files/vkcup-2015-wildcard-2-tests.2.zip
You can appeal on tests and their answers until April, 28th, 23:59:59. After that we will finalize the results. After finalizing all found bugs will not affect the final standings.
Good luck
hiiii
??
There will be no contest for a week?
is it rated? :/
I dont think 7h long contest will be rated.
not 7h...7days
sorry , my english isn't very good i didn't find out what participants can register for contest because i can't register for that
everyone
Hey, guys, I have problem statement from an insider!!!! We will have to optimize Codeforces platform to stabilize CFRs :)
(upd) And I was right! :D
From an insider ? What do you mean?
Just Google it
or even better place to search for definitions: https://en.wiktionary.org/wiki/insider
Yes I know what does it mean, but I don't understand how you got the statement.
No C#? I think it is better language for big oop task. And for work with strings also (I mean splits, regexps and other). Or vkontakte don't like it?
I cant register for some reason. It says registration is private.
so we can't have a contest (one with actual problems) for another week huh?
Probably you should disable viewing the submissions source codes after the contest, otherwise the cheaters will learn how to trick your detector.
It is true. Thanks.
Maybe opening submissions except top 10 will not harm. And many of us will be able to learn new things from other solutions!!
I really want to know the algorithms used by others. What a pity!
Even if the algorithm used to solve a problem can be posted on the editorial, the implementation also matters a lot. One learns a lot by looking at the implementations of good coders, so that in future we can save both time and effort.
I'd be disappointed if this happens, because the ability to view good solutions is one of the many reasons I like CodeForces a lot.
Is there any way to manually test with custom inputs? I don't know if it's possible to do custom invocation with this kind of input, and I don't really know how to run tests on files like these offline.
Never mind, I figured out how to test offline.
What is the difference between
Wrong answer
andAccepted [0 points]
?Edit: Wrong answer = false positive, Accepted [0 points] = didn't identify anything at all
Do the first 10 system tests correspond to the training data?
Edit: Yep
It seams that you don't use
-O2
option for compiling codes in C++11 ZIP, what's the reason ?Maybe I misunderstood scoring algorithm, but why I don't get any points on 4th test with program that prints
What is submission?
http://codeforces.net/contest/537/submission/10778343 http://codeforces.net/contest/537/submission/10778577
UPDATE: Nevermind. I realised that second submission is wrong because I forgot to add newlines. And first one is apparently generates different output on server and on my computer.
UPDATE2: I forgot to close opened file. That was the reason of difference between outputs. I don't know why.
It would be extremely ironic to cheat in this contest :)
We will run winnner's solution against contest submissions.
maybe winner is the cheater one?
I expect almost all solution to fail to find similarities in zip archives.
Will codeforces Contests tab be unavailable during this 7 days ?
The complete list of contests is available here .
thank you
Hmm, I don't have any experience with this kind of tasks. Can someone please tell me how should load the files or show me some sample code ( not one wich solves the problem , just how to load them)
As far as i got is this :
1)I'm given an input with some file names.
2) I should load them from some (for example) "01.zip" file ? or All the separate (the .cpp/.pass) files inside the "01.zip" should be copied in my Project folder and only then they should be loaded.
3) Whats the thing with .a files (for example the "01.a" file)
1) Yes
2) Input test files are located at (for example) "01.zip", but on server they would be in the same folder, as your programm
3) .a files contain jury's answers to tests
thanks!
Great contest!!
thank you!
I tested in my local.my code is printing output in output.txt but i got runtime error. Can anybody help me ?
Not sure this is the problem, but instead of
you should write
Thanks a lot
For example: if answer on some test case is
and my program printed:
what will be my score ?
Probably it will be 2 / 6 * 100 = 33 points (because jury's answer consists of 6 pair of similar solutions and in your answer are only 2 pairs)
I think it is 100*2/C(4,2) = 33
Is there test,with cheating codes,in two differ languages? (for ex: java and cpp codes)
It is acceptable (though rarely) that the couple of fraudulent statements is written in different languages.
Not sure if I am missing something, but I can't find the sample tests here: http://assets.codeforces.com/files/vkcup-2015-wildcard-2-samples.zip
EDIT: Here they are: http://assets.codeforces.com/files/vkcup-2015-wildcard-2-samples-1.1.zip
While I was thinking about it all my ways of thoughts went to
Romeone idea to use some lexer (and parser if possible) in order to for example remove unnecessary newlines, unused variables etc. And if you look at it closely you will see that that exact things are done by compiler. So my suggestion will be to not only revolve around sources but also use machine code (for compiled languages) or bytecodes (for java, py, c# etc.) for comparison.Is any partial score considered as a wrong answer ? I request to change the colour of partially scored solutions from red to anything else, it looks really depressing.