cheater_killer's blog

By cheater_killer, history, 6 months ago, In English,

Today while hacking I came across the following solutions by amitgomi and Born_Confused

53149949 and 53156694 which are exactly same, the variable "tes" is added by amitgomi to avoid plagiarism.

And I further noticed that they had been doing this in a lot of contests.

The culprits involved are from the same college/organisation(IIIT Lucknow) : amitgomi, Born_Confused and the_phoenixx.

I found these 6 cases in the past 10-12 contests alone( probably more if we look into more past rounds ) :

These are just the ones which can be seen clearly are copied from one another. I have ommitted submissions which are very similar (like these 52702208 and 52707014 (change of flow) from 551 Div2) which I highly suspect are copied as well.

In such cases of continued cheating shouldn't the accounts be banned?

 
 
 
 
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6 months ago, # |
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i think they participate as a team

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6 months ago, # |
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I think MikeMirzayanov should take some strict action.

If no action is taken even after reporting of such cases, then you're just promoting such actions and many people would start doing the same(which would be unfair to other users).

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6 months ago, # |
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As far as I know and have seen, MikeMirzayanov Sir doesn't do anything about these cases. There was one more case in the recent past ( link ) and no action was taken.

It's so disheartening for many users who participate in contests regularly and honestly.

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6 months ago, # |
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You could have used your original account to report this cheating. Making a fake account is itself a cheating

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    6 months ago, # ^ |
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    Hey nik7, Is nikhacks your fake account? You could also have used your original account, right ? Making a fake account is itself a cheating.

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6 months ago, # |
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There was a wild card round of VK Cup, to write a plagiarism checker. Can't the winners of that round detect such cases? It seems to me they should be able to...

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6 months ago, # |
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We used to give contest by sitting together and helping each other so that we can improve our knowledge by sharing the knowledge(during contest time). But it is not legal and unpleasant to some other contestants. So, we will consider this. And change our team practicing accordingly.

BTW cheater_killer You are not doing anything wrong or illegal by posting this blog. So no need to make a fake account for this.

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    6 months ago, # ^ |
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    You are trying to justify cheating? Really? Lol

    There are virtual contests if you want to "share knowledge during the contest"

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      6 months ago, # ^ |
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      I didn't said that "we didn't did this"(not denying my past).
      Event I didn't said that I will continue it(not denying to improve future).
      What else you want?

      If you trying to show us a way (Virtual contests). You are most welcome.

      But "Lol" doesn't make any sense.

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    6 months ago, # ^ |
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    Don't try to get away by the excuse of "team practice". You are doing this just for the ratings.

    Helping each other by "sharing the knowledge" would be discussing strategies not copying each other's solutions.

    Also team practice for what? ICPC? If so, then FYI, the structure for it is 3 members one computer, not 3 members 3 computers.

    Instead of apologizing you are trying to justify cheating. Shame on you.

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      6 months ago, # ^ |
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      It seems to me you personally dislike him.

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        6 months ago, # ^ |
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        I personally dislike cheaters and it is the reason behind my name :P

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          6 months ago, # ^ |
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          cheater_killer Get a life man. Set a goal in your life. Work hard for that instead of pointing fingers on others.

          AND

          amitgomi, Born_confused, the_phoenixx Come on man that was not good enough excuse. Do not steal ratings. Earn them.

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            6 months ago, # ^ |
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            Created 62 min ago. Who are you trying to fool, we know you are amitgomi.

            You really are stupid, first tried to cheat in educational round(where there is open hacking and everyone is checking other's solution) and now this.

            Making a fake id to support your own statement is next level loneliness.

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              6 months ago, # ^ |
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              You just nailed it bro. Good job

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    6 months ago, # ^ |
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    I used to poop in public places. But it is not legal and unpleasant to some other people. So, I will consider this. And I will change my lifestyle accordingly.

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    6 months ago, # ^ |
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    amitgomi How will you justify when you were plagiarised in ICPC onsite qualifier round ? Was it practice among college teams then ?

    ICPC 2018 Indian Onsite Qualifier Ranklist

    His team has been removed from the final ranklist. Although he was ranked 18th before.

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      6 months ago, # ^ |
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      Lol, this contest is dated 2018 and now also he is cheating. This just tells that he is not going to change.

      MikeMirzayanov sir, FYI.

      Did this team consist of these 3 members?

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BTW. I have a doubt which may seem very silly. In this contest, was there any way to hack by selecting an institute. I have this doubt because that's the only way you would have caught the_phoenixx or may be by comparing my code or Born_confused code with everyone present in my institute. If there is any way to hack by institute, I would like to know.

And thanks again for drawing our attention towards our bad practice. We will consider it.

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    6 months ago, # ^ |
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    Shame on you. You still keep saying you will "consider" it. How about you say that you will stop cheating?

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6 months ago, # |
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While I have absolutely no problem with you reporting cases of cheating, do you happen to know why there are two other accounts with very similar handles compared to yours (yetAnotherCheaterKiller and CheaterKiller) which also appear to do nothing but report cheating?

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    6 months ago, # ^ |
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    cause people make fake accounts lol

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    6 months ago, # ^ |
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    Bcoz nobody likes cheaters Bessie. And like me many have tried to expose cheaters before in the hope that some action would be taken.

    But in this case they have cheated in > 50% of their contests. And the fact that MikeMirzayanov and codeforces won't do anything about it is just sad and frustrating.

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I banned one of them and informed two others that ban them in case of any more cheating. Let's take a look at their behavior in the future.

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    6 months ago, # ^ |
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    Hmm, now I wonder what a banned account looks like? Like what message do they get when they get back on CF and what do we see when visiting a banned account profile?

    (don't do that to me pls I'm clean as heaven @@ )

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    6 months ago, # ^ |
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    That's great sir. It's great to see some action take place. I am sure it sends a strong message to the community.

    Also I would like to apologise for using a fake account, That was wrong on my part.

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    6 months ago, # ^ |
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    Isn't it illegal in a way how can you penalize him if the plag detector could not catch them. What is the solid proof that they copied if the plag detector could not catch them. And if it is so obvious that they copied then why weren't they caught on the first place. Isn't it a failure for such a prestigious website to be unable to catch such obvious plagiarism which could be identified just by a look.
    MikeMirzayanov The question still remains to you sir what is the solid proof that they copied if the plag detectors could not find it(obviously other than the the fact they accept their mistake) and also is this the solution to such problems as I am pretty certain that there are many users which indulge in such practices what about them?

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      6 months ago, # ^ |
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      The plag checker is not a god or a human. It was made by humans, the algorithms it uses were designed by humans. No model is 100% accurate.

      Think of youtube. It is able to remove most of the plagiarised or illegal videos. But still some of them are not removed, but any youtuber/user manually reports a video to be plagarised, they manually check and remove. Their video was not detected by their plg checker does not mean that they are the owner of the video.

      And for the last point, it's like a murderer saying when a terrorist is roaming free why should I be punished.

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        6 months ago, # ^ |
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        I agree with your last point, I actually just meant to ask for a better solution.
        While for the rest it still remains same, not one time was the plag checker able to make the right decision, with such performance I doubt it would ever catch anyone for cheating, and the current method of judging is so uncertain you point two random codes and decide without any set rules if they are copied or not, dosen't sound very professional.
        Just because someone feels it was copied should not be the reason for such serious steps there should be some rules(more accurate ones) according to which the code must be tested that is all I am saying.

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          6 months ago, # ^ |
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          you should have studied before writing random things like "point two random codes and decide without any set rules if they are copied".

          Check this Discussion about the currently used checker : Link

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            6 months ago, # ^ |
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            You should certainly not talk about fake accounts and organisation.
            The point is what if someone who you think has copied code denies it what then what is the proof that he copied if the plag checker says otherwise that's all i meant to say, have an answer to it then reply don't lead the conversation astray.

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              6 months ago, # ^ |
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              Solutions and test generators can only use source code completely written by you, with the following two exceptions:

              1. the code was written and published/distributed before the start of the round,
              2. the code is generated using tools that were written and published/distributed before the start of the round.

              If there are any doubts about the time of publication, possible collaboration etc.,  a participant will have to prove his/her complete innocence by presenting compelling and satisfactory evidence


              Rule while registration : will not communicate with other participants, use another person's code for solutions/generators, share ideas of solutions and hacks


              Don't publish or spread your solutions and solution ideas during the contest.


              Any violation of these rules, rules from the FAQ section, rules from the contest announcement or rules that were accepted during the registration will lead to penalty provisions

              I hope this helps.

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              6 months ago, # ^ |
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              Well, the cheater himself pointed out that he was "sharing knowledge" during the contest.

              What more proof do you need?

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    6 months ago, # ^ |
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    Hey Mike please introduce user block and message deletion feature. I am not talking about deleting a message I sent to someone. But atleast I should have the power to delete an abusive message that a random user is sending me. Someone is harassing me. You can see my talks. Just imagine what if a high rated coder would have asked you this. Please don't ignore. It's really demotivating to see my inbox filled with such abusive message

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