The contest was good, problem D was very interesting. However, I want to expose two sussy users.
Problem C: https://codeforces.me/contest/2048/submission/297305429
This guy just change his code(may be not his code) to just 1 line, why did he need to do that??? May be he copied someone else's code and change it so system testing couldn't detect it?
Additionally, is another user's code for C is very similar to above code, but in another language:
Problem C: https://codeforces.me/contest/2048/submission/297300414
And there is more, their codes for D are also similar, just different language Problem D: https://codeforces.me/contest/2048/submission/297334479
Problem D: https://codeforces.me/contest/2048/submission/297331568
I still don't know if this is cheating or not, but if it is, I hope they will know their mistakes and never do it again. Cheating is unfair.
Sorry for my bad english