quanpham0805's blog

About Codeforces rating and "Skip" system
By quanpham0805, history, 7 years ago, In English

Dear Codeforces, I've done round #467 recently, quite a hard round though, a little bit decrease in rating. Then I realise that, my friend who is also took part in this contest, he found that the problems were too tough for him, then he decided to copy code from the other in order to Skip his contest result.

Here is the point: It's not fair, because even the round is hard but with this Skip trick, you won't get decrease in rating. I wish CF may fix this problem.

Suggestion: the Skip users should get some kind of penalties such as decrease rating or point, or ban them from few contests.

  • Vote: I like it
  • +90
  • Vote: I do not like it

Comments Comments (28)
| Write comment?
»
7 years ago, # |
← Rev. 3   Vote: I like it +33 Vote: I do not like it

I think that if you cheat on CodeChef the rating system treats you as if you didn't solve anything.

Banning people from a few contests won't really work with those who are serious about their rating, unless it is something like a 6-month ban.

→ Reply
  • »
    »
    7 years ago, # ^ |
      Vote: I like it +21 Vote: I do not like it

    Yea I just want people who participate in contests should be more serious on their work, not just focus on their "fake" rating by cheating

    → Reply
    • »
      »
      »
      7 years ago, # ^ |
        Vote: I like it -20 Vote: I do not like it

      Totally agree with you, man. Nowadays, a lot of cf users treat cf rounds irresponsibly. In order to change this awful and disgusting attitude I suggest three simple rules:

      1. Every cf round participant turns off his/her phone during the round.
      2. During cf round you can't go to a bathroom without an independent observer.
      3. Once a week every cf user sends MikeMirzayanov his/her urine and Mike tests it for doping.
      → Reply
      • »
        »
        »
        »
        7 years ago, # ^ |
          Vote: I like it -6 Vote: I do not like it

        Man I'm serious about this problem, your suggestions 1 and 2 will work when participating in contests which take place somewhere, but the third one is absolutely trolling

        → Reply
        • »
          »
          »
          »
          »
          7 years ago, # ^ |
            Vote: I like it -32 Vote: I do not like it

          I appreciate your opinion, but can you be a little bit more specific. Why do you think third one is trolling?

          → Reply
          • »
            »
            »
            »
            »
            »
            7 years ago, # ^ |
              Vote: I like it -30 Vote: I do not like it

            Yes I totally agree with you man, Competitive Programming is not a troll!!!

            → Reply
          • »
            »
            »
            »
            »
            »
            7 years ago, # ^ |
              Vote: I like it 0 Vote: I do not like it

            In my point of view, if the third one comes true, then Codeforces will be the place for people to test the use of doping, not for coding anymore

            → Reply
            • »
              »
              »
              »
              »
              »
              »
              7 years ago, # ^ |
                Vote: I like it -13 Vote: I do not like it

              I agree that Codeforces is mainly a platform for coding, but please don't forget that rating also matters. I know that there are companies where they consider your rating, before offering you a job. Because of that, identifying a cheater is a serious issue, as they corrupt everyone's rating.

              So I propose two layered protection:

              1. Check code for plagiarism
              2. Check urine for doping

              For cf user it is a simple procedure: pee into the bottle and send it to Mike, but for cf community it would be a huge improvement.

              → Reply
              • »
                »
                »
                »
                »
                »
                »
                »
                7 years ago, # ^ |
                  Vote: I like it +9 Vote: I do not like it

                I agree with your first one, but I cannot do the same with the second for the above reason

                → Reply
              • »
                »
                »
                »
                »
                »
                »
                »
                7 years ago, # ^ |
                  Vote: I like it +1 Vote: I do not like it

                I thought everyone from ITMO was smart. But you are a legendary troll.

                → Reply
                • »
                  »
                  »
                  »
                  »
                  »
                  »
                  »
                  »
                  7 years ago, # ^ |
                    Vote: I like it +13 Vote: I do not like it

                  says the legendary troll himself

                  → Reply
                • »
                  »
                  »
                  »
                  »
                  »
                  »
                  »
                  »
                  7 years ago, # ^ |
                    Vote: I like it -24 Vote: I do not like it

                  I am not a troll, I am just a stupid boy.

                  → Reply
»
7 years ago, # |
  Vote: I like it -14 Vote: I do not like it

MikeMirzayanov My friend can we do something about this?

→ Reply
»
7 years ago, # |
  Vote: I like it -31 Vote: I do not like it

quanpham0805 Thank for sharing the idea kkkkkkk....

→ Reply
  • »
    »
    7 years ago, # ^ |
      Vote: I like it +24 Vote: I do not like it

    Just don't do that, rating shows how you are doing in contests, if you cheat on yourself, you can do nothing

    → Reply
    • »
      »
      »
      7 years ago, # ^ |
        Vote: I like it 0 Vote: I do not like it

      Could you please explain what the trick is? I can't understand from your post.

      → Reply
»
7 years ago, # |
  Vote: I like it +27 Vote: I do not like it

someone posted this years back and... still no fix. Should just completely wipe 300 points off the cheater's rating in my opinion.

→ Reply
  • »
    »
    7 years ago, # ^ |
      Vote: I like it -19 Vote: I do not like it

    Why you gotta be so rude? Sometimes people cheat without knowing, what about people losing their code on Ideone for exemple?

    → Reply
  • »
    »
    7 years ago, # ^ |
      Vote: I like it +11 Vote: I do not like it

    And talk about cheaters and the one who help cheaters, if I'm not wrong, only the one who copy the code of others get Skipped, but I think the helpers should be punished too, because they support the others to cheat, or cheaters create clone account for the actions.

    → Reply
    • »
      »
      »
      7 years ago, # ^ |
        Vote: I like it 0 Vote: I do not like it

      I am a little more restrained on this one, because there are always accident and security issue (remember one contest whole bunch of red codes somehow got leaked?), but if it can be shown it was deliberate, then it should apply the same punishment.

      → Reply
      • »
        »
        »
        »
        7 years ago, # ^ |
          Vote: I like it 0 Vote: I do not like it

        I've been thinking about that recently and, in my point of view, the authors should have the responsibility to protect their code when participating in contests. For example, in my country(Vietnam), both cheater and author get the same punishment, the author if not deliberate, then because of his carelessness

        → Reply
        • »
          »
          »
          »
          »
          7 years ago, # ^ |
            Vote: I like it +2 Vote: I do not like it

          It wasn't careless, the codeforces system itself got hacked. It wasn't their fault at all. If author shared with cheater, he should get same punishment, but having your code leaked because of codeforces error is definitely not the same as cheating on purpose, or even carelessness.

          → Reply
»
7 years ago, # |
  Vote: I like it 0 Vote: I do not like it

How could he copy code from other contestants? I don't really get it. Is there a bug in CF system? And how did his contest result get skipped?

→ Reply
  • »
    »
    7 years ago, # ^ |
      Vote: I like it +13 Vote: I do not like it

    Cheater will first solve easy problem on dummy account. If the contest goes badly, cheater will copy code from his alternate account and submit, then his main account will get skipped verdict, so there is no rating loss.

    → Reply
  • »
    »
    7 years ago, # ^ |
      Vote: I like it +5 Vote: I do not like it

    Or simply ask someone who is also participating in the round, such as friends, the author doesn't get any punishment

    → Reply
»
7 years ago, # |
  Vote: I like it +12 Vote: I do not like it

MikeMirzayanov and KAN , please read this blog .

→ Reply
»
7 years ago, # |
  Vote: I like it 0 Vote: I do not like it

his account is DuongCSP :> report him :>

→ Reply
»
6 years ago, # |
  Vote: I like it -16 Vote: I do not like it 
...
→ Reply