In the codeforces round 709, I made a submission from my alt account for div2A to see if the codeforces plagiarism checker really works. To be honest, I thought initially that the round was unrated because of no formal announcement, so I dared to try it out. Eventually, ended up losing rating ,lol. Well, it doesn't matter.
Here are the two submissions:110629586 and 110636692 with exact 100% match. But, the plagiarism wasn't detected. So, I wondered if several such submissions go unnoticed every contest to due to this bug or am I missing something. Feel free to comment, I don't care about the downvotes as well but if this is a serious issue, MikeMirzayanov please look into it.
My guess is the plagiarism checker won't be run on all the questions in a contest because it is highly likely that one solution to trivial problems (implementation wise) such as the one that you have shared is similar to another.
PS: I don't think having an alt account is a good idea. Not sure about the exact rules though.
Yeah, I understand in many cases div2A and B are trivial, so the logic can be same. But what about the case when there is a 100% code match as above, like those who copy and paste the solution received from their friends or groups.
It is not exactly the same code, because one uses "GNU C++17" compiler and the other uses "GNU C++17 (64)", so when the compiler replaces the libraries, maybe it will produce a different code, but yeah, definitely the Code Plagiarism Checker should detect this kind of things.
I got plagiarized for the first question. My sol — 109233079, Other sol — 109231770 So, imo plag checker runs on every problem even if sol is very trivial
Sure, if a problem is like
print a*bwe don't run anti-plagiarism. And the fact that the codes coincide can only mean that the participants use the same template code. It is strange to punish for this.MikeMirzayanov Is plagiarism checking still done on Codeforces? I was checking it for some of the recent contests and did not find any skipped solutions.
At what percentage are the two solutions plagarized?
How much rating did you lost ? kira201
Bro looking at your contest history and contest submissions it's clear to see why you're asking this question lol.
I think plagiarism is only detected when there's a similarity between two problems, not just one, and plagiarism is still run on trivial problems.