So I found these two cheaters in today's contest. They are from from the same institute (Jaypee Institute of Information Technology, Noida). They have been doing this in at least 2 past contests now.

User 1: Akash Sharma akash_sharma100

User 2: Harsh Pandey Harsh_jiit

Obviously, these users made good efforts to hide the plagiarism by kinda writing same lines of codes in 2 different ways.

Submissions:

A: 87530347 by Akash and 87541714 by Harsh (Apparently Harsh has a lot of penalties in previous submissions that are not similar to Akash's)

B: 87559272 by Akash and 87554697 by Harsh

C1: 87578447 by Akash and 87583632 by Harsh (Can you notice Harsh tried to hide his func function definition, which is exactly the same as operate in Akash's code btw, below between the template? XD)

C2: 87587393 by Akash and 87592242 by Harsh (I dont need to say anything about this one XD)

Maybe if you present me with 2 similar looking submissions, I cannot definitely say whether they cheated. But it is very very suspicious for 2 users to have such kind of similarities in all the problems in a single contest.

Btw, they did the same in the last contest (#657) and both of them got big deltas (+139 and +71). Check their submissions.

I know CF team is very busy with more important things but I think pointing out even a single cheater is still worth it. Kindly take appropriate actions MikeMirzayanov

UPD The cheaters have been banned from the contest.