phanquocthai2012's blog

A Question About a Submission in Codeforces Round 1111 (Div. 2)
By phanquocthai2012, history, 3 months ago, In English

The participant I'm referring to is:

Prototype1510

Submission

https://codeforces.me/contest/2247/submission/383359064

Screenshot

(https://drive.google.com/file/d/1J3rfKOxOfwAbEAqG06M7-tJRN8EYBJbx/view?usp=sharing)

Hi everyone!

Today, I'd like to hear the opinions of people who participated in this round or solved Problem F.

I noticed a contestant whose submission timeline caught my attention. During the contest, they submitted an accepted solution roughly every 30 minutes. They solved only Problems A and B before eventually getting an accepted solution on Problem F, which is a significant jump in difficulty.

To better understand how they solved it, I contacted them privately after the contest and politely asked them to explain their solution, including the main idea, the algorithm, and the implementation.

However, instead of receiving a technical explanation, the only reply I got was:"like u think"

After that response, I honestly didn't know what to think. It made me wonder whether there might be something unusual about the submission, but I also understand that this response alone does not prove any wrongdoing.

So I'd like to ask the community:

  • Does this progression seem unusual to you?
  • If someone legitimately solved Problem F, would you normally expect them to be able to explain the core idea afterward?
  • Are there reasonable explanations that could account for this situation?

I'm not accusing anyone. I'm simply looking for objective opinions from experienced competitive programmers and participants of this round.

Thank you.

  • Vote: I like it
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3 months ago, hide # |
 
Vote: I like it 0 Vote: I do not like it

As a cheater exposer (that's how I call myself lol), this blog is kinda trash, like you provide no evidence beside what you think. In fact, I'm investigating this case myself. My intention is that, the 4th episode of my series will be about Prototype1510.

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

    Thanks for your feedback! I really appreciate it. This is actually my first time writing a Codeforces blog, so it's probably a bit clumsy :((. My intention wasn't to accuse anyone, but rather to hear opinions from people who participated in the round. I'll definitely try to do better next time. Looking forward to reading your investigation!

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3 months ago, hide # |
 
Vote: I like it +1 Vote: I do not like it

I think the suspicion is understandable. Spending almost an hour on A and B, then solving F in just 26 minutes is certainly an unusual progression. It doesn't prove cheating by itself, but I think it's reasonable to ask for further review, especially considering the response when asked to explain the solution. Here's the submission timeline: here

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

Oke e zai

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    3 months ago, hide # ^ |
    ← Rev. 2  
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    Deleted, because someone wants me to delete this. Please don't check the previous revision.

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    3 months ago, hide # ^ |
     
    Vote: I like it 0 Vote: I do not like it

    ok e =))))

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    47 minutes ago, hide # ^ |
     
    Vote: I like it 0 Vote: I do not like it

    ok e zai luôn

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

tốt e

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

As he admitted that he cheated (according to hunglvh's comment), I think that he should be thrown to cry's basement marked as a cheater in the database. However, I think that he shouldn't be banned, because he DMed my friend CheaterGotTalent, saying that he is regretting now/

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3 months ago, hide # |
← Rev. 2  
Vote: I like it -18 Vote: I do not like it

I'm sorry :(((

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