[JAN'15] Top contestants (msm1993 and kutengine) cheat again

code_streak · January 14, 2015, 10:38pm

I am a fan of @mugurelionut… just this… hats off to your efforts…a true coder…!!

mb13mb13_1995 · January 14, 2015, 11:34pm

Coding world is happy to have you @mugurelionut.

lundura_cud · January 16, 2015, 10:47pm

One thing is for sure, if you want to beat mugurel in Code chef Long, you better beat him fairly, else HE WILL FIND YOU & HE WILL KILL YOU (humor intended).

betlista · January 13, 2015, 3:08pm

That’s not a bad idea, in theory I can ban the user, but I’m not sure if such user is banned only in forum or also for a contest, someone wants to try (I can ban for a limited amount of time)?

mugurelionut · January 13, 2015, 9:12pm

@betlista: What did you find suspicious about @yowa’s submissions?

sidgupta234 · January 13, 2015, 9:35pm

He had submissions only for the Challenge problem, so it might be used by people who required more submissions to optimize their solution.

betlista · January 13, 2015, 9:54pm

When I saw it, it was during the contest, so I was not able to see the code. After the contest I didn’t investigate more, but it is as @sidgupta234 described above, I’m not telling definitely he is guilty, maybe just a big fan of challenge problems, he/she always solve only challenge problem (as I can see from his profile)…

neo1tech9_7 · January 14, 2015, 5:05am

Some people do only the hard problems or the challenge problem in the long challenge.

mugurelionut · January 14, 2015, 5:19am

@subhendu_sethi: I agree with you that @msm1993 and @kutengine are good programmers, but they seem to lack any kind of ethics. They are willing to do anything in order to get high ranks in the contest - and that includes cheating (repeatedly). It’s sad that Codechef admins allow such behavior to take place on their platform without doing anything about it.

mogers · January 14, 2015, 5:27am

Right, one should be careful. For example, gennady.korotkevich - CodeChef User Profile with global rank 1 | CodeChef only played with the challenge problem in DEC14.

kuruma · January 14, 2015, 6:17am

Im not sure if I can do it myself… not sure if this is about karma or about those stars in front of your name, but, if I could I would!! this is unfair for @mugurelionut which I actually greatly admire for his awesome submissions and way of explaining things… There are contests possibly better suited for teams or for someone with dubious ethical standards…

ketanhwr · January 14, 2015, 9:10am

I think the admin should take a strict action this time.

neo1tech9_7 · January 14, 2015, 9:51pm

For starters it is quite a known fact that Koreans compete in teams. Secondly in the previous competition they had basically the same solution for the challenge problem. No matter how closely you think you can’t have solution with that kind of similarity unless you are cheating. Thirdly if we assume that they had similar ideas in previous challenge then how did they have wildly different codes for same ideas in this contest unless they are trying to hide something ?

mugurelionut · January 16, 2015, 1:21am

@admin: I think reducing the submission limit to 200 is a good idea. At least it’s one more step towards less over-fitting of the solutions to the test data.

mugurelionut · January 16, 2015, 1:27am

@dzlla: I think it’s possible to have similar ideas (particularly if one discusses the problem with others), but not that similar. Moreover, I was also mentioning that they had identical parameters used for tuning their solutions, which they tried hard to hide (by encoding these parameters in different ways in the 2 submissions). I can explain to you why these parameters were very important in obtaining high scores for this problem, but there is not enough space in a single comment. I will try to write a separate answer about this or maybe write about it on the editorial page.

subhendu_sethi · January 16, 2015, 5:00pm

@mugurelionut Its true sir. admins must take action.

nitinj · January 16, 2015, 5:04pm

yea dzlla, you created this account just to comment on this thread? fishy much??

mugurelionut · January 18, 2015, 6:27pm

@nitinj: Funny, I hand’t noticed that I have to agree with you that it’s a bit fishy

kislaya · January 19, 2015, 5:51pm

Their rating has been increased not dropped.
Why is codechef being so biased with them?

mugurelionut · January 20, 2015, 7:20am

+1 for @kislaya’s comment. I also don’t understand why this happened. I am hoping that the Codechef team is still considering their cheating case, but they updated the ratings in order to avoid further delays. Maybe they’re waiting on some reply from @msm1993 and @kutengine before deciding on this cheating case… I don’t know.