Why do the ratings of the last a few round disappeared?

MikeMirzayanov please determine the difficulties of the problems of last three rounds.

Try to submit this accepted code

the accepted submission: Accepted

the wrong once: Wrong on test 16

MikeMirzayanov Why you don't make a new rate rank greater than the LGM now there are 52 and In my opinion, the greatest rate rank must contain a very little number of users!