Codeforces!
Codeforces! Proof_by_QED, chromate00, larush, Edeeva, and I would like to invite you to participate in Codeforces Round (Div. 4), starting on Feb/09/2025 17:35 (Moscow time). We have baked $$$8$$$ problems to be solved in $$$2$$$ hours and $$$15$$$ minutes. We hope the problems will be interesting, unique...and skibidi.
The format of the event will be identical to Div. 3 rounds:
- ICPC rules with a penalty of 10 minutes for an incorrect submission;
- 12-hour phase of open hacks after the end of the round (hacks do not give additional points)
- after the end of the open hacking phase, all solutions will be tested on the updated set of tests, and the ratings recalculated
- by default, only "trusted" participants are shown in the results table (but the rating will be recalculated for all with initial ratings less than 1400 or you are an unrated participant/newcomer).
We urge participants whose rating is 1400+ not to register new accounts for the purpose of narcissism but to take part unofficially. Please do not spoil the contest for the official participants.
Only trusted participants of the fourth division will be included in the official standings table. This is a forced measure for combating unsporting behavior. To qualify as a trusted participant of the fourth division, you must:
- take part in at least five rated rounds (and solve at least one problem in each of them),
- do not have a point of 1400 or higher in the rating.
Regardless of whether you are a trusted participant of the fourth division or not, if your rating is less than 1400 (or you are a newcomer/unrated), you may choose to participate rated or unrated.
Large text, to get your attention for the following:
PLEASE NOTE the rule restricting AI use. If you are caught using AI in an unorthodox manner, either by us manually or detected automatically, YOUR ACCOUNT WILL BE TERMINATED. We will be actively scouring submissions and terminating rulebreakers.
Anyways, I would like to orz the following:
Vladosiya for coordinating.
Our growing family of testuwuers: [VIP] Dominater069, Error_Yuan, amoeba4, Intellegent, [VIP] LMeyling, temporary1, efishel, 18o3, -firefly-, __baozii__, monadtransformer, Sacharlemagne, Lilypad, kevlu8, Filikec, [VIP-] macaquedev, hashman, mathtsai, DivinePunishment, pianapolataa, reirugan, and poi.
MikeMirzayanov for running this site for 15 years. 15 years ago, I was still eating crayons.
Participate for a fumo.
Oh cry also play Honkai : Star Rail.
Don't you know cry has made multiple problem based on hsr?
As a
testerproblemsetter, I really don't know how eating crayons affected cry's problemsetting skillsAs a tester, I'm thankful to the crayons for affecting cry's problemsetting skills, because I don't think we would have gotten such a skibidi round otherwise.
i love cryons
As a new user in CodeForces,I hope it will be great.
As a tester, this round was quite skibidi.
when is the next rollback?
As an author, instead of eating crayons 15 years ago, I ate snacks from the floor 10 years ago.
As a tester, I still eat snacks from the floor.
As a testuwuer, this is my first time testing a round! Hope everyone enjoy the problems.
As a tester, I am sure this round will be not only skibidi, but suspicious as well.
Chatgpt o3 mini was able to solve all problems of a recent div4 which I tried. I hope problems after D are non ChatGPTable since your rounds are more towards the standard side cry
I would advise you to not focus on whether problems are GPTable or not, and focus more on enjoying the problems. Best of luck!
o3 mini COMPLETELY solves Codeforces Round 962 (Div. 3) and its a Division 3 contest. If you haven't taken any special care then sim pretty sure first page of standings will just be cheaters considering this is a Division 4 contest.
So what is the point of saying all of this? Are you planning on cheating? We have already said in the announcement that any accounts suspected of using AI will be banned, either by us or by plagiarism checker after the contest.
I don't cheat and if the problems are not gpt proof it will be impossible to catch if someone implements the code of ai on their own.
Why would I cheat I'm asking you to make problems non gptable.
Personally, I would far prefer a problem that's 10% more fun/interesting but GPT'able than a problem that's less interesting but GPT-proof. Whether people cheat or not is not my concern. I imagine most people in the community feel this way — why should we sacrifice our enjoyment just because other people want to cheat?
Of course, in an ideal world, the problems would be both interesting and GPT-proof. But problem setting is hard. I've tried coming up with problems in my spare time, and I've come up with nothing remotely passable. If you think you can do it, then go ahead and try. If you think cry's rounds are unsuitable, then don't compete in them. But don't just expect setters to be able to magically produce perfect problems that are both enjoyable to solve and perfectly GPT-proof.
Completely agree with this. To be honest, I think whether a problem can be solved by AI should be the last concern. It has already become too difficult to make only problems that are GPT-proof, especially when the problems are supposed to be easy, and in a near future it will be almost impossible even to make GPT-proof Div. 2 problems. I don't want problemsetters to suffer from interesting problems being rejected just because of this. It's only our job to improve general conciousness on cheating and contest writers should be free from such burdens.
atleast last 4 problems shouldnt be gptable
As a testuwuer, I can confirm that there are at least 8 problems and no more than 8 problems that need inputing and outputing.
as a tester, i lost an ungodly amount of braincells reading the problem statements. best of luck
I started grinding IELTS for codeforces rounds.
first time I will be out of competition ;)
Mee tooo (I'll try to ak it)
good luck
cry made me addicted to crayons
Can any tester tell me how many problems I can do or how many problems are of a newbie level
who has done 2 problems in div . 1 + 2 and 3 problems in div . 4 .
For obvious reasons, they can't say that, but my estimate would be a newbie could 3-4 problems
I think the last problems will not with rating 2000+ like this 2044H - Hard Demon Problem
As a newly-ordained [VIP-] testuwuer — I assert that if you do not participate in this skibidi sigma round, the gang of testuwuers will fanum tax you out of existence and send you to the depths of Ohio.
man its going to be a massacre. It should be unrated honestly.
As a participant, I love the AI restriction rule
As a tester, the round is more skibidi than anything I've seen before
As a tester, I promise that all problems are good! Have fun!
cry will make us "cry" this time ...
will there be a 2700 rated problem this round?
I hope so
Hope to reach specialist
First time the round is rated for me, but I'm not a trusted participant.
Really wanted to participate, but can't.
BdOI (Bangladesh Olympiad in Informatics) preli in the that day :sob:
As a participant, i wish everyone a positive delta
as a tester
why are all testers>= blue for a div 4 :(
This is going to be my first contest on this platform. Too excited!
are rule restricting AI use also hold for unrated participant?
yes
i hope that someday i test some contest .
Finally, it has been Long awaited
As a tester, I can confirm I didn't eat crayons 15 years ago, because I didn't have one.
Planned post contest discussion
I wish I don't need this in this contest(in a good way).