shsh's blog

I hacked the winner of 2166 D2
By shsh, history, 6 months ago, In English

Check this submission: 349307834.

The reason I'm making this post is because the hack I used was very rudimentary, with $$$t = n = q = 1$$$. Shouldn't such a test be included in pretests/systests? Personally, if I had achieved rank 1 in contest but then gotten hacked by such a simple countercase, I would be distraught.

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6 months ago, hide # |
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It's an alt of a well known cheater. LucaIlie

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6 months ago, hide # |
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I used the same test to hack the solution of rank 24 ankitraj803120. (Name doesn't check out)

Submission: 349306725

Now I'm thinking we may be able to find more of these at the top.

UPD: Rank 54 youssefahmed3803 hacked — 349308161

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    6 months ago, hide # ^ |
     
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    interestingly both of them are cheaters what a sad day

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    5 months ago, hide # ^ |
     
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    A good way to mass-catch these guys is to sort codeforces submissions by memory usage. Go to any contest's "Status", then filter for AC submissions on the specific problem. And then, add "?order=BY_CONSUMED_MEMORY_ASC" to the URL. Then, check how much memory the GPT guys are using. Then roughly around there in the standings, you will often find loads more of them.

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6 months ago, hide # |
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If it helps anyhow, the new winner is also most probably a fraud. Take a look at his submission to problem B (which gave WA2) just 5 minutes in the contest -- looks like the LLM has overfitted a bit :)

He also had a (longer-than-usual) solution to C submitted only 2 minutes after that one; achieving probably the fastest C (A) solution in both Div1 + Div2 in less than 2 minutes; and he even did it the 'slower-to-code' way, by simulating the process. In my opinion, 100% sus behaviour.

Plus, when he started climbing the rating ladder after a huge break, he completely changed the language he is working in.

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6 months ago, hide # |
 
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I have a question,how do you find the test that their submission dont bypass? Like you just make test generator and code to check his and your codes's output?

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6 months ago, hide # |
 
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Check this submission: 349307834.

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does this thing only happens with me or?

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