Cheating

arpit_sof 2009-11-11 19:20:07 UTC #121

Kindly take some strict action against such cheaters,
like remove them from spoj or ban etc.

Thanks

system 2009-11-29 00:32:59 UTC #122

Another problem.
Some users are hiding problems with the excuse of 'Empty Input File'.
A recent example was ANARC09E by Robert Gerbicz, username: gerrob.
EDIT: The problem is there is no problem! The problems are perfectly fine! These users are just hiding these problems, so others cannot find and solve it, reducing its point value.

TripleM_sof 2009-11-29 00:37:49 UTC #123

Uh, why are you posting that under a cheating topic? It was hidden by a member of the editorial board because, as he said, the input file for the problem was empty. Once it is fixed it will be unhidden.

Davpe_sof 2009-12-31 10:48:25 UTC #124

Cheating user:

https://www.spoj.pl/users/int3lig3nt/

numerix 2010-04-20 15:58:12 UTC #125

Seems that this guy is submitting lots of solutions from past contests one after another: spoj.pl/users/nealzane/
Statistics: vnoi.info/index.php?option=com_v ... r=nealzane

john_jones 2010-04-20 17:18:00 UTC #126

This guy is the admin of Zhejiang University Online Judge, so he has lots of programs to submit He has done the same thing @ PKU Online Judge long time ago.

mima_sof 2010-04-30 20:36:09 UTC #127

Neal is not a cheater, he contributed to the growth of SPOJ.

see: spoj.pl/credits/

ctna 2010-05-03 09:44:05 UTC #128

numerix wrote

hi.My account in SPOJ is aiolios. And there're some same problems between
VOJ(vn.spoj.pl) and SPOJ(spoj.pl) . And i submited my code from VOJ.
You can find here
vn.spoj.pl/users/canhteo
spoj.pl/users/aiolios
all of them are mine.

carlosralv 2010-05-04 12:37:45 UTC #129

A large number of accepted solutions in short time certainly raises suspitions, but we have to be careful.

I just checked this forum to see if anyone was annoyed by my recent activities, when I resubmitted 50+ of my C++ solutions using a different compiler (g++ 4.3.2 instead of 4.0.0-8) to check if there was any improvement in performance. This kind of stream of submissions would look like cheating to almost everyone following it.

By the way, there were some improvements, but they were not consistent. I reached the first place in 5 problems, anyway.

Carlos

nthrgeek 2010-05-05 11:52:59 UTC #130

EDIT: The guy has disqualified those solutions now, so I am removing the post.

numerix 2010-05-05 15:18:48 UTC #131

Thanks for clearing that, I'm sorry for my wrong assumption. Same according Neal Zane.

carlosravl is right, one should be careful with those assumptions, and nthrgeek is also right.
On the other hand, I think, this is the place to post thus things. If a suspicion is wrong, it can be cleared easily.

akhurang 2010-05-29 03:48:47 UTC #132

My dear friend, there are cheaters from all over the world!
So my humble request is please do not to make such statements

shkoorah_sof 2010-08-09 12:07:47 UTC #133

https://www.spoj.pl/status/ALIBB,gxx/
I believe submit #3197093 must be removed (?)

arpit_sof 2010-08-22 17:03:20 UTC #134

spoj.pl/users/mohamed_maher/
spoj.pl/users/mido22/

i think both accounts are of the same person, today from one account he added a problem in classical section and then solved it immediately, ,
please admins check it, and if found true, then take the appropriate action...

rajeevk 2010-11-19 13:50:14 UTC #135

This user has been found cheating from Past COCI,Codechef and ACM contests..

spoj.pl/users/the_great/
Remove his account from SPOJ

gooey_kablooie_sof 2010-12-06 11:38:41 UTC #136

Please have a look at this user :
spoj.pl/users/abhipr1/

He has solved all problems of GNY07* and SAMER08* but has failed to solve simple problems like CPRIME, ANARC09B, CANTON, CHOCOLA, MKBUDGET (its a DP problem of the simplest kind and yet he has solved SAMER08C and SAMER08D). Even the submission times don't differ by much. I might be wrong here but still looks suspicious.

michi 2010-12-09 14:59:03 UTC #137

This user submitted 9 different problems within two minutes.
Pretty strange!
spoj.pl/status/smoochy/

Edit: Furthermore: 19 different Problems in about one hour. Seems like he has copied that.

TripleM_sof 2010-12-09 20:51:15 UTC #138

I highly doubt that user is cheating. Submitting that number of correct solutions in such a short time means it is more like they aren't cheating; they're probably submitting their own solutions from another online judge. The problems aren't related in any way, so there is no way they would have downloaded solutions for those problems from one place.

numerix 2011-02-16 22:59:05 UTC #139

User mohamed_maher is problemsetter of problem 8315 and 8351 (problemcode: MIDO!) and was(!) problemsetter of 8349 and 8319 (for the last two problems the name of the problemsetter changed some hours/minutes ago).
User mido22 has AC submissions to these problems, especially he actually has top rank in challenging problem 8315. Short time after I wrote a comment below problem 8315 where I pointed out that this user "mido22", who called himself mohamed_maher is obviously problemsetter and has successful submission for these problems, the following happened:
- user mido22 with former name mohamed_maher changed his name to "mido22"
- my comment below problem 8315 was deleted
- my AC Python submission for 8315 that was somewhat shorter than the 340 Bytes solution of mido22 was disqualified by problemsetter
- problem now is no longer opened for all languages but restricted to some languages

I don't know if someone is cheating here, but user mido / mohamed_maher should explain these things.

numerix 2011-02-19 07:28:19 UTC #140

Moderators please have a look at https://www.spoj.pl/problems/NUMWORD/.
What happens there has a bad taste.
Actual top rank mido22 belongs to the group of problemsetters or is related to them.
Either he is a genius in shortening C++ code (which is not very likely if you look at his results in other shortening problems, e.g.
https://www.spoj.pl/problems/WORDNUM/ or https://www.spoj.pl/problems/NPRIME/) or he only prints the expected output.

See also problems 8351, 8373 and 8374 from same group of problemsetters: For all those problems user mido22 submitted the first AC solution short time after the problem was published.