Note. This is an updated version of this post. If you like this style more, please tell me in the comments.
Since tourist's breakthrough, I've received a lot of requests to update my old posts with rating achievements. However, I wasn't able to do it immediately since my method of doing it requires to download the rating change history of every user, which, in turn, requires to perform several hundred thousand requests to Codeforces, about which the website (and Cloudflare) is not happy. It took more that three days, but finally the job is done!
Below are two tables. The first one is the greatest (by absolute value) negative rating changes. The second one is the first users ever to reach some rating value. First table:
Second table:
Here is the twin of this blog with ratings below 1500.
