Attention!
Your solution 221115308 for the problem 1863C significantly coincides with solutions Schi2oid/221115308, LBRhhhh/221122939. Such a coincidence is a clear rules violation. Note that unintentional leakage is also a violation. For example, do not use ideone.com with the default settings (public access to your code). If you have conclusive evidence that a coincidence has occurred due to the use of a common source published before the competition, write a comment to post about the round with all the details. More information can be found at http://codeforces.me/blog/entry/8790. Such violation of the rules may be the reason for blocking your account or other penalties. In case of repeated violations, your account may be blocked.
I received this surprising message today. I don't know who is LBRhhhh, and I didn't use any online IDE. In fact, this is a quite easy problem as C for Div.2, I just use the trick of "Back in time"(in China, we call it this way), use the result to get the beginning situation. I'm sure there's no chance LBRhhhh can get my code, unless there is a system vulnerability. I don't know what I should do to avoid the penalty. Please check this blog MikeMirzayanov.
Considering your rating, It's unlikely you'll spend time cheating rather than writing the code yourself.
Otherwise, You clearly cheated if we only look the two codes.
MikeMirzayanov needs to find a solution to this problem I guess....
I know Yikun personally from the last 1 year and he also solved my doubts on algorithm mostly :)
And I am very sure that Yikun doesn't cheat at all its just a vulnerability :)
Please look into the matter MikeMirzayanov
i agree, check their e's code it's different. a person who can solve e have large chance not cheat on c
I noticed that my contribution is cleared. Is that the penalty?
Anyway, thanks for your trust.
It's impossible for him to cheat, this must be a misjudgment.