MikeMirzayanov's blog

By MikeMirzayanov, 5 months ago, In English

Hello.

Today I removed the account zh0ukangyang from the rating, after first nullifying its results in the Pinely Round 3 (Div. 1 + Div. 2) and banning it.

I would like to remind you again: Codeforces insists on the policy of using a single account. Creating and using additional accounts violates this rule. In an ideal world, each Codeforces account corresponds to one specific person.

Sometimes additional accounts are created for official, usually collective purposes (writing a post on behalf of a company, etc.). In such cases, these accounts do not participate in rated rounds and we do not pay attention to them unless there is some abuse of Codeforces resources.

Unfortunately, it is difficult for us to enforce this rule in almost all cases. But I urge you to respect the rules. Please remember that by registering for any rated contest, you confirm that you are participating with your only account. If this is not the case, then you are violating the community rules. Do not do this. By breaking the rules, you automatically agree that punishment may be applied to you.

In cases where rule violations significantly affect the ratings of other participants, we may take drastic measures. Remember, with great power comes great responsibility.

In this case, zh0ukangyang was at the top of the ratings, occupying high places in the rounds.

What should you do if you already have several accounts and want to stop breaking the rules? You should not write to us with a request to delete accounts or transfer data from one account to another. All you need to do is simply stop participating from all accounts except one. Change the password to a random one and do not log into the account anymore.

For participants at the very top (somewhere in the top 50 of the ratings), we are ready to manually deal with the situation and exclude illegal accounts from the rating.

M.

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5 months ago, # |
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I think there was something quite cool about the fact that this guy was so good that he had two accounts in the top 10. I feel he could have been given an exception.

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    5 months ago, # ^ |
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    I think the fact that he had two accounts in the top 10 is precisely why it was important to punish him. If we allowed all the top users to start competing on many accounts, getting each one to ~3500 rating before making a new one, then the top 10 would have many duplicate accounts and it would no longer be the "top 10", defeating the point of the leaderboard.

    That being said, this applies to the entire scoreboard and not just the top 10, so I would like to see the rule being enforced in more cases if possible.

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      5 months ago, # ^ |
        Vote: I like it +425 Vote: I do not like it

      The thing is that it shows how amazing his skills are, we all knew from the start that he has multiple accounts, but no one really addressed it.

      While many people discussed about how a person like zhoukangyang destroys rating of other contestants in the same contest, Mike didn't say a single thing about Goodbye 2023. In my opinion, a bad contest causes much much more damage to both codeforce's reputation and the contestants.

      Solve Goodbye 2023 first.

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        5 months ago, # ^ |
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        I would suggest you believe the sun rises in the west instead of Mike is going to solve Goodbye 2023

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        5 months ago, # ^ |
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        Happy New Year to everybody!!!)

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          5 months ago, # ^ |
          Rev. 2   Vote: I like it +33 Vote: I do not like it

          There have been so many mistakes you probably can't even count them in Goodbye 2023. Here's just a few: 1.Weak pretests in A. 2.Incorrect and self-contradicting usage of "divisor" in the statement of B. 3.Incorrect and self-contradicting usage of "parent" in the statement of E. 4.F has appeared previously. 5.G doesn't have a proven solution. 6.Author's solution of G is incorrectly implemented. 7.H is too easy. 8.H is in OEIS. --copied from other's comment.

          Just turn to that blog and you will find the truth.

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            5 months ago, # ^ |
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            Weak pretests is never a mistake

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            5 months ago, # ^ |
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            Weak pretests are your own problem. Pretests are called PRE!tests because they do not guarantee you that your solution is correct. Anyway, It's funny to see complaints about weak pretests in a quite easy problem.

            Also one of your complaints is that Goodbye was a Mathforces round — what's the point of competing in programming if you don't want to go into math? Math and informatics lay close to each other.

            There was indeed a considerable problem with G, but a correct implementation was written after the round and the correct solutions were taken in account during/after the system testing, so it didn't affect the results.

            Googleable H might have been a weak part of this contest, but lets be honest guyz. 95% of the contestants probably won't even read tasks F+ (during the contest).

            So these problems didn't affect the majority of the contestants, and they mirorly affected the minority of contestants (I doubt that many 2000+ guyz google tasks to get free points).

            Goodbye wasn't the best round, but all of you keep forgetting, that when you say "It's bad", you are comparing it with other CF rounds, which are mostly flawless.

            I just think that coordinator of Goodbye doesn't deserve all the hate. He had coordinated contests in the past which were pretty high-quality.

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              5 months ago, # ^ |
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              The idea of pretests is to speed up testing. They should detect majority of incorrect solutions.

              95% of the contestants is Div. 2. So you are just ignoring entire Div. 1.

              Read about 74TrAkToR's contests here.

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          5 months ago, # ^ |
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          I also didn't take the contest so I'm quoting my friend here: A had weak pretests so lots of FSTs, E had 1 second time limit on a heavy implementation seg problem, F and H were both googleable, and for G the model solution was literally incorrect (No solves during the entire contest). It was also major mathforces and the only contest within the past few years where editorial didn't have solution code. 74traktor was coordinator and apparently also ignored tester feedback on the problems

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            5 months ago, # ^ |
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            Weak pretests are your own problem. Pretests are called PRE!tests because they do not guarantee you that your solution is correct. Anyway, It's funny to see complaints about weak pretests in a quite easy problem.

            Also one of your complaints is that Goodbye was a Mathforces round — what's the point of competing in programming if you don't want to go into math? Math and informatics lay close to each other.

            There was indeed a considerable problem with G, but a correct implementation was written after the round and the correct solutions were taken in account during/after the system testing, so it didn't affect the results.

            Googleable H might have been a weak part of this contest, but lets be honest guyz. But let's bee honest guyz. 95% of the contestants probably won't even read tasks F+ (during the contest).

            So these problems didn't affect the majority of the contestants, and they mirorly affected the minority of contestants (I doubt that many 2000+ guyz google tasks to get free points).

            Goodbye wasn't the best round, but all of you keep forgetting, that when you say "It's bad", you are comparing it with other CF rounds, which are mostly flawless.

            I just think that coordinator of Goodbye doesn't deserve all the hate. He had coordinated contests in the past which were pretty high-quality.

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            5 months ago, # ^ |
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            Bro plagiarized me

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          5 months ago, # ^ |
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          Thanks, Happy New Year!

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        5 months ago, # ^ |
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        4real?)

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    5 months ago, # ^ |
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    i wish zhou creates another alt and abuses more div1s :)

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can't he do it again?

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Div.1 abuser 😱 impressive

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5 months ago, # |
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Probably one of the main reasons people use alts to participate in rated contests is to participate in an unrated manner (in case they can't participate for the entire duration,..). For that, some judges have option for unrated participation. Maybe adding this feature would help deal with this issue.

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    5 months ago, # ^ |
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    I'm considering implementing it, but I'm not sure it will be very helpful — I believe there are several other reasons.

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      5 months ago, # ^ |
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      People agree with this idea as shown by this blog

      In addition I believe it would drastically reduce the number of alts (however I doubt it will eradicate the issue with having alts which pollute the top standings in div4, div3 and div2)

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      5 months ago, # ^ |
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      Atcoder has this for 2 years (or more ?) now. It works very well there. I dont think we have problem of alts on atcoder at all (There are probably many other reasons for this but yes, this is probably one big driving feature of their offering)

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      5 months ago, # ^ |
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      I think, A user should be able to make multiple (limited) sessions, where the user should state his/her primary session as official, which can't be changed forever. However the user can participate from other sessions too if he is not willing to participate from the primary session. But the rating will not change for user officially, it will only provide shadow ranks/scores.

      This way we can decrease multiple accounts by legitimating multiple sessions attached to one account

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      5 months ago, # ^ |
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      I am strongly against this option, and here are some reasons why...

      First off, you either participate in the contest or you don't. I'd like to think all people who participate take the contest as seriously as I do, trying to get the best result possible. Allowing unrated participation blurs the line a lot and I would feel much less satisfied doing good in a contest where half the people participated in an unrated manner.

      Virtual contests already exist, and if you want to try and do the contest without participating officially, there already exists an excellent feature that does exactly that. Yes, you cannot do it until the contest is over, but still a small price to pay for keeping the contest as "real" as possible.

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        5 months ago, # ^ |
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        But there could be options to separate the scoreboard for rated and unrated participants, so you may view only those who are participating in a rated manner. I don't think your concerns and those concerns of casual participation for fun are mutually exclusive.

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        5 months ago, # ^ |
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        Why would you feel less satisfied if half the people participated as unrated?

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        5 months ago, # ^ |
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        Atcoder and USACO already has unofficial participants in their contests. People still take their contests seriously.

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      5 months ago, # ^ |
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      Only reason this account exists is to attend contests when I havent solved any questions last 3 days, so I personally would not use this account if unrated registiration was a thing.

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        5 months ago, # ^ |
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        Bro is asking to be banned💀

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      5 months ago, # ^ |
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      one of the reason is that we want to do shitposting , so please implement a feature where we can write comments being anonymous

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        5 months ago, # ^ |
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        And don't forget to make sure while being anonymous, it still should show us the rankings

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      5 months ago, # ^ |
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      Sir , In atcoder judges , when we register we can decide that as a rater or unrated. If this feature is added in CF it will be very helpful may be.

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      5 months ago, # ^ |
      Rev. 4   Vote: I like it +2 Vote: I do not like it

      MikeMirzayanov But people can use this to cheat. People will use alt accounts to check the verdict and gonna submit it from their real accounts. Maybe the results of their submission can be halted for the duration of the contest and they can check their solution after the contest. Virtual Contests already exist for that though.

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        5 months ago, # ^ |
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        You can already "cheat" without this, you only need two accounts, no matters if one is on unrated mode

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damn,i wonder how do catch alt account users

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    5 months ago, # ^ |
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    maybe check their IP address or code style, I guess

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      5 months ago, # ^ |
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      maybe sometimes the code style looks similar,its improper in this way

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    5 months ago, # ^ |
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    sBetter

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    5 months ago, # ^ |
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    Codeforces could add a rule that the first 10 or 15 rounds have a * showing that the account's rating is unreliable.

    Codeforces could also do the same as Kattis where everyone has to use his/her real name. Here, they could enforce a policy where only accounts with real names can participate in rated rounds. (Of course, there still would be nicknames and trolls, but they would risk being deleted as soon as spotted, without a warning. Reminders about that could be given before each contest.) This way people can keep their alts for unrated participation, training or whatever, and only participate in rated rounds under their name. It would also make it harder to sell profiles.

    I'm pretty sure people won't use accounts with other people's names in rated rounds as often as they use alts now. That would solve most of the problem.

    In general, a serious systematic approach to this growing problem is long due.

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      5 months ago, # ^ |
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      Can't you just create an account with a made-up name that looks real? There are even websites can generate entire fake identities: link (just search "fake name generator" on Google).

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        5 months ago, # ^ |
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        It is highly unlikely that people will bother doing that, except for only a few trolls. Because they wouldn't be able to show off those fake accounts, anywhere. Apart from boosting the ego, it's pretty pointless to make such accounts (unless I'm missing something).

        Especially if Mike finally takes this problem seriously and begins deleting alts. The community will also change the attitude and condemn this. Right now it's more like "oh come on, it's not such a big deal", some even have the audacity to accuse Mike of racism and threaten him with weird consequences — instead of shaming the top-rated coder who clearly violated the rules, not to mention completely unethical behavior towards fellow coders.

        Even if those accusations are pretty stupid, they are right about the inconsistency of punishments. It's not ok to punish one coder and let hundreds or thousands of others do the same thing freely.

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5 months ago, # |
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I wrote a blog about a possible solution 18 months ago. 130 upvotes, 0 comments.

The solution: Codeforces should implement a feature that lets you create and manage alt accounts through your main account. These alt accounts can gain rating in contests, but cannot influence the rating of other accounts.

Edit (clarification): I am not proposing more alt accounts. I propose a System that knows every alt account on Codeforces. If Codeforces knows all alt Accounts, it can:

  • show leaderboards without alt accounts
  • calculate ratings without alt accounts
  • show rating graphs without alt accounts

Meaning alt accounts don't influence ratings of others, ever. But the System needs to:

  • be easy to use (1 click creation of alt accounts)
  • ensure the alt Account has a (seemingly) normal rating
  • ensure the alt Account sees the leaderboards like a normal user
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    5 months ago, # ^ |
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    Wow, that can lead to 114514 LGM

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      5 months ago, # ^ |
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      You would create your alt account through your main Account. The issue you are refering to is easily solved, as mentioned in the Blog:

      • "Codeforces will be able to track these accounts"
      • "Codeforces could display the leaderboards differently"
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    5 months ago, # ^ |
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    A rating system is suposed to measure the performance of participants, it makes no sense to have multiple ratings under the same system.

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      5 months ago, # ^ |
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      "it makes no sense to have multiple ratings under the same system."

      you are correct, and its not the case in what I propose. "These alt account [..] cannot influence the rating of other accounts". If you create your alt account through a System, Codeforces knows its an alt account. It knows to treat you differently. It can show the leaderboard differently. All you gain is an alt account that 'feels' real, without influencing anything.

      The goal of the proposal is to give an alternative to real alt accounts. I am active in communities and I would assume that roughly 20% of the community uses alt accounts. Its a problem I would love to have fixed.

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        5 months ago, # ^ |
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        Yes but this would only work if the alt account didn't gain any rating, which can be fixed easily by adding a Unrated participation. I think unrated participation is the key and would fix many problems.

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          5 months ago, # ^ |
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          I don't think it would fix everything, but a lot. So sure, unrated participation should absolutely be a thing.

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    5 months ago, # ^ |
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    That's quite innovative and impressive, for this can effectively limit the interruption of contestants with high rating. And can anyone tell me why would someone use multiple accounts during a competition?

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      5 months ago, # ^ |
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      you dare answer under my -145 comment? That's crazy! But I appreciate it <3

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    5 months ago, # ^ |
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    ok, f lot of lgms will take first places in div4, 3, 2 rounds and everyone will suffer. Do we really need it?

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5 months ago, # |
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I think IZONE is a multiple account of ainta. Please remove the one with lower rating. Thanks.

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I think you can setup an anonymous channel for people to report alt accounts. Usually alt accounts are known by at least a few people closed to that person. For highly rated alt accounts, this method should be quite effective.

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    5 months ago, # ^ |
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    How will you verify the reports?

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    5 months ago, # ^ |
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    I don't see a reason for that. It's impossible to stop false accusations and it's very hard to be sure whenever an account is an alt or not. Doing it manually, and only for high rated users, like what just happened seems to be the only way to go.

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Mr M, I am alt too.

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i think the main reason he was caught, was probably because he used his name with the alt account, otherwise i think it would be pretty hard to catch alt accounts. Now he has to again make an alt account with different handle :(

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I think all the accounts are alt accounts of jiangly. Please remove the ones with lower ratings. Thanks.

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Finally!

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5 months ago, # |
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Do you think implementing the option to register unrated would help with this problem?

Some create an alt account to not lose rating on the main account, but I believe some people also do this because they are not feeling very well, didn't sleep a lot, had a stressful day, or something like that, but still wants to participate.

One may argue that they can virtual register later, but I think the point is to participate live. Kinda like people pay to watch a sport live, rather than watching the recording later. Just knowing that there are thousands of people also participating at that moment makes it feels different.

What do you think?

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    5 months ago, # ^ |
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    It would help a bit but I doubt that that's the reason most people alt. We already have many people alting in div2 from div1 to sandbag on others and unrated participation is already an option for those.

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The main problem is people who participate in one contest using two accouts. they hacked their alt accouts to get extra hacking points. Codeforces needs to find these people and punish them.

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    5 months ago, # ^ |
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    i absolutely agree it, because in the last div4, i found some weird hacking in Problem C. Specifically, he made a special judgment that the sum of an array was equal to a specific value, making the result incorrect. and this submission was not unexpectedly hacked.

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      5 months ago, # ^ |
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      You don't get any points for hacking in open hacking phases (EDU/Div.3/Div.4)

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    5 months ago, # ^ |
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    You must be very lucky to make them arranged in the same room.

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      5 months ago, # ^ |
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      Oh, that makes sense. So the problem is people using alt accounts get double delta.

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Time to solve the problem Alternative Accounts.

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But he had made lots of effort in this banned account. It's a good start to stop alt accounts, but (that alt accs thing) is really widely spread and in multitude of people (even grandmasters). I hope this punishment gonna be future affecting only.

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I guess we can deal these issues with biometrics

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is it okay if you have more than one account and only participate with one account for each rated contest then? just curious

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    5 months ago, # ^ |
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    But that's exactly what zh0ukangyang done! He never participated in same contest from both accounts but was punished because he had two accs on top 10.

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      5 months ago, # ^ |
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      which is his 2nd id

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        5 months ago, # ^ |
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        orzdevinwang. Also I feel like the user should be given the right to choose which account they want deleted. What if CF headquarters deletes the account that the person actually wanted to keep even if it had lower rating?

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You are right, but orzdevinwang will be back on the top.

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Codeforces will be infamous!

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cnnfls_csy and tzc___________________wk are the same person

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I support it.

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5 months ago, # |
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I, of course, was shocked. I, of course, thought a person could lost at most some hundreds of rating points in one contest. I am wrong. Here's why.

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    5 months ago, # ^ |
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    Please do not post such meaningless response here.

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Vladimir Vladimirovich Mike.

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I think jiangly is a multiple account of jiangIy. Please remove the one with lower rating.

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Also,many people uses alt account to avoid taking score penalty. BTW,implementing built-in delete account feature would be nice!

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That's a good initiative, Mike. Please remove all the double users.

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Why don't you remove these guys too.

https://mirror.codeforces.com/blog/entry/123886

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Now it's all history. Ha-ha!

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Oh no, we can't have another sorry_dreamoon then!

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No comment.

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It is kind of funny how Mike responded to removing an account, rather than responding to Goodbye 2023's errors.

Anyway, what about those accounts that just reck div 2 contests?

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In short, I hope that Codeforces will handle this matter properly, revoke the punishment for Zhou Kangyang's account suspension, handle it gently, and standardize the management regulations.

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    5 months ago, # ^ |
      Vote: I like it +255 Vote: I do not like it

    And Zhou Kangyang did not use two accounts in the same game, which has no impact on the rating.

    This is incorrect. The rating system is (approximately) zero-sum; any rating gained must be lost by other competitors. Therefore, in the process of moving from the default 1400 rating to its eventual 3400 rating, the zh0ukangyang account took around 2000 rating from other contestants. In contrast, if he had competed on his orzdevinwang account, a 3400 performance would lead to a near-zero delta and would have basically no effect on others' rating.

    Managers should remind users for the first time, give a second warning and communicate with them, and perform account blocking and other operations for the third time.

    What would be the point? Using multiple accounts is not allowed, so even if the second account was warned and not banned, it'd be a violation of the rules to use it again anyway. No action was taken against the orzdevinwang account (as far as I know), so this contestant still has the ability to compete on his main account assuming he follows the rules of the platform.

    If the management does not properly handle this matter that I believe has been overheated, I and many other athletes (not limited to China) will consider it to be racial discrimination and regional discrimination. This not only undermines the enthusiasm of many players for Codeforces, but may also lead to a shift in opinions and attitudes towards certain countries.

    Recall the following policy stated in the original post:

    For participants at the very top (somewhere in the top 50 of the ratings), we are ready to manually deal with the situation and exclude illegal accounts from the rating.

    If you want to show that this is a discriminatory action, I suggest identifying and reporting any other alt accounts in the top fifty. Otherwise, you have no evidence that the same action would not be applied to a known alt account of another nationality.

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    »
    5 months ago, # ^ |
      Vote: I like it +11 Vote: I do not like it

    Are you sure he wasn't warned about it before? gamegame was warned about his alting activities some years ago, that might be the case here.

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5 months ago, # |
Rev. 2   Vote: I like it +310 Vote: I do not like it

Goodbye 2023 and some 74TrAkTor's contests have had a significant negative impact on the community, but you said nothing about it.

Why you ban zky but not 74? What bad things will happen if zky has multi accounts?

  • »
    »
    5 months ago, # ^ |
    Rev. 2   Vote: I like it +63 Vote: I do not like it

    Why you ban zh0ukangyang but not 74?

    This time, you didn't say You're wrong again, but said nothing! Just keep this round as a usual round and pretend nothing happened? Then act like a dictator to ban zh0ukangyang?

  • »
    »
    5 months ago, # ^ |
      Vote: I like it 0 Vote: I do not like it

    There will be too many Chinese people instead of Russian on top10

  • »
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    5 months ago, # ^ |
    Rev. 2   Vote: I like it +204 Vote: I do not like it

    (I'm writing this comment with the risk of it being possibly removed, of course – I hope that it actually gets read and taken into consideration.)

    I agree wholeheartedly with this comment.

    Even though I think Traktor doesn't precisely need to be banned (possibly just evaluated more in coordinating, i.e. having another coordinator to cross-check on the problem preparations, etc.), and these two problems are inherently different, I don't see the reason why the Codeforces HQ has taken action on zh0ukangyang's account first.

    It's true that both of these events do need addressing. I'm not saying to simply ignore the alt-account phenomenon. However, even a simple response regarding Goodbye 2023 such as "After an internal discussion, we decide that the round will still be rated" would be better than complete silence and these 1984-esque events. Here's what I think.

    • The top users with alt accounts would simply continue on with doing contests and improving themselves, be it through Codeforces or other online judges, no matter what happens to their alts. It's not like they need to stop doing competitive programming after their alts are removed.

    • The users who don't feel affected by the presence by the alt accounts (for example, those who don't care about rating) simply think of this as a notable moment of the largest rating drop in Codeforces, and continue on with their lives.

    • The users who are affected more by the Goodbye 2023 event than the alt accounts will feel more negatively towards Codeforces, and it just hurts Codeforces' name in general.

    I myself don't really care about rating as much now – recently, I've been more focused on my relative position during rounds among my friends list.

    Again, I do think that the zh0ukangyang event is important. I'm thankful that Codeforces has finally addressed it, and I think it's a good step towards showing the HQ's involvement in the community. Despite that, there are other much more important things to address, such as an official response to the Goodbye 2023 round and the unrated participation system mentioned in this comment. By prioritizing these first, the third bullet point above would certainly be prevented.

    To sum it all up, here's a quote from my friend: "Alts only break rating. Contest disorganization breaks both rating and experience."

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    »
    5 months ago, # ^ |
      Vote: I like it +7 Vote: I do not like it

    I agree. Codeforces is first an academic website. And the Goodbye Round was such an important round during one year. We can see a great number of people have taken part in Goodbye 2023 and was strongly disappointed by the quality of the problems(especially Problem H).

    What would you like to say about it? MikeMirzayanov

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5 months ago, # |
  Vote: I like it +29 Vote: I do not like it

zh0ukangyang will be back at the top with a new name! :(

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5 months ago, # |
  Vote: I like it +7 Vote: I do not like it

I mistakenly thought that Codeforces had banned all of Zhou Kangyang's accounts, and now I think there's nothing wrong.

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5 months ago, # |
Rev. 11   Vote: I like it +660 Vote: I do not like it
  1. Rebelz = xtqqwq
  2. gyh20 = menjihuang
  3. fivedemands = gamegame
  4. VivaciousAubergine = Rewinding
  5. AoLiGei = Laurie = Mr_Eight
  6. MyBotDear = Elegia
  7. wangziji = A-SOUL_Bella
  8. HaitangSuki = dXqwq = MatikaneTannhauser
  9. Pub = cmll02
  10. Kevin114514 = TheLuminousSky
  11. PinkieRabbit = PinkRabbitAFO. (sorry)
  12. Chtholly-Nota-Seniorious = SSerxhs
  13. Sugar_fan = jiangly_fan
  14. XenonKnight = tzc_wk = wk_tzc
  15. Aokana = RocketCider
  16. Little09 = Pointy
  17. 5sb = cmk666

Edit: I remove those alts that is inactive for one year, except myself.

Also, there are some account boosting behaviors

  1. WYZFL = disorientation = abandonedw1 = abandonw2 = renascencepjw0510. Booster: LJC00118.
  2. yincheng01. Booster: SSerxhs.
  3. Ariadne.w.. Booster: PinkRabbitAFO. (sorry, I don’t even remember why I would boost others then. Someone reported this to me and I must add it)
  • »
    »
    5 months ago, # ^ |
      Vote: I like it 0 Vote: I do not like it

    Doomsday

  • »
    »
    5 months ago, # ^ |
      Vote: I like it 0 Vote: I do not like it

    Waiting to see if Mike will just remove these accounts.

    • »
      »
      »
      5 months ago, # ^ |
      Rev. 2   Vote: I like it +26 Vote: I do not like it

      I don’t think so. I quote

      What should you do if you already have several accounts and want to stop breaking the rules? You should not write to us with a request to delete accounts or transfer data from one account to another. All you need to do is simply stop participating from all accounts except one. Change the password to a random one and do not log into the account anymore.

      end of quote. Just stop using alts to participate is ok.


      Furthermore, I think Mike should be more active to solve this.

      Let’s see AtCoder: There’s an option to participate as unrated, this feature can be introduced.

      Update: Oh I see Mike replied here, I think that’s good.

      • »
        »
        »
        »
        5 months ago, # ^ |
          Vote: I like it 0 Vote: I do not like it

        Mike set zky's rating to 0 instead of expecting him to no longer use a alt account to participate. Mike thinks, the alt accounts in the top 50, according to Mike, is already affecting the standings. We can't assume that Mike won't do anything to the accounts. :P

  • »
    »
    5 months ago, # ^ |
      Vote: I like it 0 Vote: I do not like it

    I thought this was a joke at first. But their submissions are literally identical, lol

  • »
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    5 months ago, # ^ |
    Rev. 2   Vote: I like it +8 Vote: I do not like it

    What does account boosting mean?

    upd: Also, FastFreeTask = arvindf232

    • »
      »
      »
      5 months ago, # ^ |
        Vote: I like it -18 Vote: I do not like it

      Just google it bro. From this

      “Boosting” is a form of cheating whereby high-skilled players access lower-skilled players’ accounts for the purpose of increasing the rank of the account for monetary gain.

  • »
    »
    5 months ago, # ^ |
      Vote: I like it +6 Vote: I do not like it

    Things people do for upvotes.

  • »
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    5 months ago, # ^ |
      Vote: I like it 0 Vote: I do not like it

    How do you know all of this?

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    5 months ago, # ^ |
      Vote: I like it +10 Vote: I do not like it

    omg hi, I messaged you on Ariadne.w. before!

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5 months ago, # |
Rev. 8   Vote: I like it +187 Vote: I do not like it

He use multiple account for sure, but you can't annihilate his ratings without any warning and written user agreements, which hasn't been used before and is not decent in any ways. Maybe you'll say he blocks some others from getting top blahblah, but I don't think he's abusing Codeforces rating system, for people all know that orzdevinwang = zh0ukangyang, so people who want an accomplishment can simply ignore his alt-account and calculate. Also, whatever you nullify can't nullify the effort he made; he is a winner forever, as we all know.

UPD: link.

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5 months ago, # |
  Vote: I like it +10 Vote: I do not like it

So if I have multiple accounts, but I won't be using those accounts to participate the contest in the same time, will not break the rules?

  • »
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    5 months ago, # ^ |
      Vote: I like it +18 Vote: I do not like it

    zky just did as this but he's banned still.

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5 months ago, # |
  Vote: I like it +99 Vote: I do not like it

Ban PinkieRabbit and PinkRabbitAFO please. It's obvious that the two accounts belong to and are used by the same person.

Yours, BanPinkieRabbit.

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5 months ago, # |
  Vote: I like it +70 Vote: I do not like it

I think the biggest problem is the problem itself. If the contest like Good Bye 2023 can't stop appearing,then you can't stop users using alternative accounts. Our rating should be shown enough respect instead of a random shuffle,and then we would use a single account fairly. BTW,resorting to nationality prejudice is not a good idea. It will aggravate the problem but not solve it.

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5 months ago, # |
Rev. 9   Vote: I like it +82 Vote: I do not like it

I think you should transfer zh0ukangyang's rating to orzdivenwang through some methods instead of directly removing its rating, which is equivalent to negating his efforts. I think this is a very biased decision, isn't it?

Punishing him without any warning is a very inappropriate decision, don't you think?

And I believe that no matter what you do to orzdevinwang, he will eventually become the number one CodeForces.

Mr. M said that "with great power comes great responsibility". but I don't think orzdivenwang has much "power". He is just a very, very excellent algorithm competition player, why does he have a lot of "power".

I can even think that you are imposing sanctions on China's LGM.

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5 months ago, # |
  Vote: I like it 0 Vote: I do not like it

Okay, okay, I know.

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5 months ago, # |
  Vote: I like it +138 Vote: I do not like it

rather befriend 74TrAkToR than MikeMirzayanov

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5 months ago, # |
  Vote: I like it +54 Vote: I do not like it

I really wish Atcoder can get serious with their website. Dictatorship on codeforces is unreal.

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5 months ago, # |
Rev. 4   Vote: I like it -13 Vote: I do not like it

I have three accounts on codeforces. And I need help getting back my original account.

Firstly, I have single account on HackerEarth ( drexdelta ) , CodeChef ( drexdelta ) , AtCoder ( drexdelta ) , CSAcademy.com ( drexdelta ) , HackerRank ( drexdelta ) , LeetCode ( drexdelta ) ,

Confusion on codeforces with 3 accounts.

Account 1:

drexdelta

This is my original account, but I forgot password and could never login.

Account 2:

After trying hard with different passwords on first account, I gave up and created second account with name "DrexDelta1" ( Last week I changed my name from "DrexDelta1" to papa-ka-para. )

Account 3:

Later, when login-with-gmail option was added to google, I tried to login on my original account using gmail ( I remembered gmail password, but not codeforces password ) . Instead of loggin-in to previous account( drexdelta ) , it created new account called ( neernpatel ) .

Can someone from moderators help me move all my contest data to one single account with name drexdelta and link it to preferable gmail.

Creating all these 3 accounts was totally unintentional, I just forgot password and logged in with gmail caused all these three issues.

Please upvote this comment to gain attentions from mods. Thank you in advance.

cc : MikeMirzayanov

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5 months ago, # |
  Vote: I like it +6 Vote: I do not like it

What was his/her main account btw?

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5 months ago, # |
  Vote: I like it 0 Vote: I do not like it

I think it's proper ,and agree it.

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5 months ago, # |
  Vote: I like it +13 Vote: I do not like it

yeah,yeah,you are right,Mr. M. But do you play Genshin? it is useful for such people.

lol

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5 months ago, # |
  Vote: I like it +21 Vote: I do not like it

I simply don't understand why Codeforces punished a famous and beloved person. It seems most of us don't think that having multiple zky's accounts on the rating leaderboard is a severe problem.

  • »
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    5 months ago, # ^ |
      Vote: I like it +11 Vote: I do not like it

    Codeforces operates independently of the policies implemented here.

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5 months ago, # |
Rev. 3   Vote: I like it +16 Vote: I do not like it

though it's written in the rules that multi accounting is not permitted, zky did not do it in contest, therefore i don't think his results for pinely round 3 should be invalidated

i would even argue that there's so many top accounts multi accounting that i don't even know why you're going after him only

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5 months ago, # |
  Vote: I like it -7 Vote: I do not like it

I bet hes not the only one with duplicated accounts

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5 months ago, # |
  Vote: I like it -44 Vote: I do not like it

mdshakib007 is a legend with 860 rating in legendary grandmaster! when mdshakib007 is a new problem solver!

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5 months ago, # |
  Vote: I like it +24 Vote: I do not like it

Welcome step. Many high rated players make new accounts and then destroy the ratings of lower div contests. Hope this is not a one time exercise and many other alt accounts are banned.

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5 months ago, # |
  Vote: I like it +49 Vote: I do not like it

delete every account that has higher rating then mine.

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5 months ago, # |
  Vote: I like it +12 Vote: I do not like it

How could you prove that zh0ukangyang is really the same person as orzdevinwang? Maybe he/she's just someone who admires Zhou Kangyang and imitates him.

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5 months ago, # |
  Vote: I like it +33 Vote: I do not like it

Mr Mike, more than zhoukangyang, you should remember that with great power comes great responsibility.

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5 months ago, # |
  Vote: I like it +62 Vote: I do not like it

This response is quite normal when zh0ukangyang in top 10

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5 months ago, # |
  Vote: I like it 0 Vote: I do not like it

In this case, could zh0ukangyang practice in Codeforces now? Or this account will be forbidden in Codeforces from now on?

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5 months ago, # |
Rev. 2   Vote: I like it -111 Vote: I do not like it

@MikeMirzayanov Don’t think that because you are an administrator, you can slander people, and don’t think that you can’t do it so you can slander others. You have no evidence! ! ! You don't even have a rule that one person can only have one account. Codeforces means that the administrator has the highest power. If you think zh0ukangyang is weak, you can deduct points from him, or even ban his account. However, the eyes of the masses are sharp! ! ! !

If you ban him, you will let all codeforces users around the world know that Codeforces administrators are corrupt! ! !

Codeforces will be infamous! ! ! ! !

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5 months ago, # |
  Vote: I like it -10 Vote: I do not like it

Codeforces Community is racist towards china why not ban indian cheaters account which spoils codeforces band indian cheaters first not targeting whole india only some loser cheaters !

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5 months ago, # |
  Vote: I like it -17 Vote: I do not like it

support you, mike. just ban every chinese alt go brrr

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5 months ago, # |
  Vote: I like it +70 Vote: I do not like it

A thing that everyone might forgot.

Uhh,theoretically speaking,codeforces don't really have a ToS(aka Terms of Service),the rule itself is from A common FAQ (codeforces.com/help),which,shouldn't really be equal to a ToS.

What is ToS?Simply speaking,it is something that we click the "I agree" button and get registered,or you can't get access to this website.What is a FAQ then?Well,if you have problems,check your FAQ.Otherwise you can ignore these.

Try to manage your rules that everyone should obey first,instead of doing a page that is optional to be read.

also shouldn't you have explanations on goodbye 2023 first? the announcement is reaching -4400,seriously?

not going to leave further comment on this post/event.

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5 months ago, # |
  Vote: I like it -6 Vote: I do not like it

Maybe there should be some way to prevent this in the future. For instance, using phone number to register new account. I think it is a good choice since no one could try to use or even buy multiple phone numbers just for flexing in ranking (it's nonsense).

  • »
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    5 months ago, # ^ |
      Vote: I like it +10 Vote: I do not like it

    Phone number registrations do solve the problem of abusive registrations to some extent, but a person can also have more than one phone number. And while emailing CAPTCHA is free, phone number CAPTCHA is paid for. I think the cost of phone number verification codes needs to be considered.

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    5 months ago, # ^ |
      Vote: I like it -28 Vote: I do not like it

    the only optimal way is to verify the citizen identifier card or passport

    • »
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      »
      5 months ago, # ^ |
        Vote: I like it 0 Vote: I do not like it

      CodeForces is a programming site. It may not be appropriate to require an ID or passport for registration due to the complexity of verifying the authenticity of different styles of documents from various countries. An electronic system may not be able to handle this complexity, and a manual review would burden the administrators.

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      »
      5 months ago, # ^ |
        Vote: I like it 0 Vote: I do not like it

      U don't know what can others do with your passport/identification card, do u? Also, plz remove my univ logo on your ava, tks!

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5 months ago, # |
  Vote: I like it +49 Vote: I do not like it

Actually, everyone in the comment section is on jiangly 's alternative account. If you don't believe it, I can change my account and make the same comments.

  • »
    »
    5 months ago, # ^ |
      Vote: I like it +21 Vote: I do not like it

    Actually, everyone in the comment section is on jiangly 's alternative account. If you don't believe it, I can change my account and make the same comments.

  • »
    »
    5 months ago, # ^ |
      Vote: I like it +56 Vote: I do not like it

    Actually, everyone in the comment section is on jiangly's alternative account. If you don't believe it, I can change my account and make the same comments.

  • »
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    5 months ago, # ^ |
    Rev. 2   Vote: I like it +10 Vote: I do not like it

    Actually, everyone in the comment section is on jiangly's alternative account. If you don't believe it, I can change my account and make the same comments.

  • »
    »
    5 months ago, # ^ |
      Vote: I like it 0 Vote: I do not like it

    Actually, everyone in the comment section is on jiangly 's alternative account. If you don't believe it, I can change my account and make the same comments.

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5 months ago, # |
  Vote: I like it +80 Vote: I do not like it

Mapakaka = hhhgjyismine = Dog_King, and hhhgjyismine has just participated in the last rounds.

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5 months ago, # |
Rev. 2   Vote: I like it +8 Vote: I do not like it

Does that mean there will be a change to the rating changes for praticipants of the last round?

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5 months ago, # |
  Vote: I like it 0 Vote: I do not like it

I think there are a lot of competitive programmers using more than one account and the reason I think is they don't want to make any mistakes in their 2nd account that they did in their 1st account. But this often demotivates the beginners seeing two same names in the leaderboard, ranking top.

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5 months ago, # |
Rev. 3   Vote: I like it +14 Vote: I do not like it

yyyyxh = yyyyxh329

ban yyyyxh329, please.

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5 months ago, # |
  Vote: I like it -8 Vote: I do not like it
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5 months ago, # |
  Vote: I like it +345 Vote: I do not like it

MikeMirzayanov = 74TrAkToR, please remove the one with lower rating. Thanks.

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    5 months ago, # ^ |
      Vote: I like it +45 Vote: I do not like it

    $$$\frac{\sin x}{n}$$$

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    5 months ago, # ^ |
      Vote: I like it +11 Vote: I do not like it

    remove the one with lower contribution lol

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    5 months ago, # ^ |
      Vote: I like it +22 Vote: I do not like it

    You are wrong,here is why: 74TrAkToR = 47TrAkToR,please remove the one with lower contribution.Thanks.

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5 months ago, # |
  Vote: I like it +2 Vote: I do not like it

MikeMirzayanov How do I delete an alt account?

  • »
    »
    5 months ago, # ^ |
      Vote: I like it +11 Vote: I do not like it

    You can't, and you don't need to.

    What should you do if you already have several accounts and want to stop breaking the rules? You should not write to us with a request to delete accounts or transfer data from one account to another. All you need to do is simply stop participating from all accounts except one. Change the password to a random one and do not log into the account anymore.

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5 months ago, # |
  Vote: I like it +6 Vote: I do not like it

You'd have to ban a good half of all codeforces accounts if you are serious about enforcing this rule. And if you are not serious about it, then it is more of a witchhunt/clown emoji type of thing.

I mean, sometimes you don't want to write a contest seriously (whatever that means), in this case writing it from an alt seems ok to me (as long as you don't jump to your main one in the middle if you realize that problems are a great fit for your skillset / that today you are a genius).

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5 months ago, # |
  Vote: I like it +25 Vote: I do not like it

I think Mike should punish 74TrAkToR rather than zh0ukangyang , a beloved people .

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5 months ago, # |
  Vote: I like it 0 Vote: I do not like it

The question is off topic: Does anyone know what's wrong with the nickname colors?

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5 months ago, # |
  Vote: I like it +49 Vote: I do not like it

You are right.But what about goodbye 2023?

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5 months ago, # |
  Vote: I like it +178 Vote: I do not like it

74TrAkToR = 47TrAkToR,please remove the one with lower contribution.Thanks.

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5 months ago, # |
  Vote: I like it 0 Vote: I do not like it

we all know about china product deplication and that's it's "an idea and the idea never dies"

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5 months ago, # |
  Vote: I like it -11 Vote: I do not like it

MikeMirzayanov is this a new feature on codeforces?

PS
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5 months ago, # |
  Vote: I like it 0 Vote: I do not like it

Bro, It's too hard for a person to compete by himself and reach LGM.

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5 months ago, # |
  Vote: I like it -10 Vote: I do not like it

Is he was in top5?

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5 months ago, # |
Rev. 2   Vote: I like it 0 Vote: I do not like it

I hope nobody will break the rules

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5 months ago, # |
Rev. 2   Vote: I like it +3 Vote: I do not like it

those people using their alt-account giving this blog a down vote :

meme
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5 months ago, # |
  Vote: I like it +10 Vote: I do not like it

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5 months ago, # |
  Vote: I like it -8 Vote: I do not like it

Who is the zh0ukangyang? I mine he's first account!

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5 months ago, # |
  Vote: I like it +203 Vote: I do not like it

Why are there so many Chinese ranting under this blog? Is it because that virtually every Chinese has multiple accounts on CF and some think that it is OK to use alts because everyone they know is doing so, regardless of the rules?

Please, saying stuff like "Mike is off his rockers to punish Zhou for breaking rules", especially in a harsh or sarcastic manner, just makes us Chinese users look like a gang of wild kids regarding Zhou as some sort of leader. It ruins the general picture. Do not do this.

I understand that some may want a result for all the issues of Goodbye 2023 (and I am waiting for it as well), but it is obviously not a valid argument to be used here against the punishment of a rulebreaker.

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5 months ago, # |
  Vote: I like it -56 Vote: I do not like it

can't understand it. that's ridiculous.

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5 months ago, # |
  Vote: I like it +37 Vote: I do not like it

Mentioning YOU KNOW WHICH Chinese foundation's banning few students WITH HIGH SCORE IN AN IMPORTANT CONTEST for one year to punish their using inappropriate words in their code, it seems a normal and easy idea to punish only top participants, especially on sth hard to control. Anyway, Peace is of ultimate importance, not quarreling.

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5 months ago, # |
  Vote: I like it -16 Vote: I do not like it

I think one of the main reason is that the account names.You can immediately recognize that they belong to the same person.

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5 months ago, # |
  Vote: I like it 0 Vote: I do not like it

some of them intentionally uses alt account to make successful hacks. If possible, add a feature to report "intentional hacking"

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5 months ago, # |
  Vote: I like it -56 Vote: I do not like it

You can add validating with a passport, at least for red persons

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5 months ago, # |
  Vote: I like it +56 Vote: I do not like it

alt accounts are for pussies

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5 months ago, # |
Rev. 3   Vote: I like it -18 Vote: I do not like it

I hate cheater very much, especially those who gain a lot through cheat.

So... Such a nice head quarter. Thank you Mike.

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5 months ago, # |
  Vote: I like it -38 Vote: I do not like it
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5 months ago, # |
  Vote: I like it +3 Vote: I do not like it

Thank you for upholding fairness on Codeforces. Clear rules ensure a level playing field. Encouraging users to abide by one account fosters integrity. Consistent enforcement safeguards the community's integrity. I appreciate the proactive stance against violations, maintaining the platform's integrity and competitiveness.

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5 months ago, # |
Rev. 2   Vote: I like it -9 Vote: I do not like it

Happy New year everyone

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5 months ago, # |
  Vote: I like it -25 Vote: I do not like it

I think the best way to counter this is to include Mobile number also as a unique identifier, We can add extra field of mobile number and keep OTP based authentication if possible.

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5 months ago, # |
  Vote: I like it +37 Vote: I do not like it

Happy New Year to everybody!!!)

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5 months ago, # |
  Vote: I like it -16 Vote: I do not like it

this is very commonly done on codeforces. Many coders share it openly even on X that they have multiple accounts. Please take some strict measures. Introduce unrated participation and then have only one login from each device as well. Plus plage check seems to have been jailbreaked. Use AI

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5 months ago, # |
  Vote: I like it -9 Vote: I do not like it

Anyway, I think you should first address the quality issues of competitions like Goodbye 2023

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5 months ago, # |
  Vote: I like it 0 Vote: I do not like it

There's a Spider Man reference here)

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5 months ago, # |
  Vote: I like it +12 Vote: I do not like it

Dear MikeMirzayanov,

In my opinion, the removal of the account zh0ukangyang from the rating highlights the significance of upholding the single account policy, a fundamental principle of Codeforces.

However, I've found that MikeMirzayanov didn't say anything (maybe little) about the contest "Goodbye 2023". I've noticed concerns within the blogs regarding the quality of Goodbye 2023 & rounds coordinated by 74TrAkToR. While I haven't personally participated, it's evident that the users cares deeply about maintaining the quality & equity of competitions (because there are problems publicly created before the contest). I hope for MikeMirzayanov to solve problems about Goodbye 2023 first rather than ban zh0ukangyang.

I trust that the Codeforces team will carefully assess community feedback and take appropriate actions to address any concerns related to round coordination. Your commitment to transparency and responsiveness is crucial for maintaining the trust and credibility of the platform.

Thank you for providing a platform for competitive programming.

Sincerely, a Codeforces user.

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5 months ago, # |
  Vote: I like it 0 Vote: I do not like it

If I registered a Codeforces account but I never use it or login this account, will I be punished?

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5 months ago, # |
  Vote: I like it -9 Vote: I do not like it

[user:Daniel_lele]=[user:sszcdjr]

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4 months ago, # |
  Vote: I like it -10 Vote: I do not like it

I think she is under home arrest without internet connection again

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4 months ago, # |
  Vote: I like it +3 Vote: I do not like it

reowong = SirPh

Spoiler
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    4 months ago, # ^ |
    Rev. 2   Vote: I like it +2 Vote: I do not like it

    This was a joke between the two of them. They are accounts for different people. They have obviously different coding styles.

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    4 months ago, # ^ |
      Vote: I like it +3 Vote: I do not like it

    you got me

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4 months ago, # |
  Vote: I like it +8 Vote: I do not like it

Create multiple accounts is totally a waste of resource,but many people like doing,me included.Is it just for fun?

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4 months ago, # |
  Vote: I like it -11 Vote: I do not like it

Hey, can I just practice the problems with multiple accounts , but participating in the contest with only one ?