Codeforces rating system is based on ELO, which is a great system. But divisions cause a bit of trouble with it. Candidate masters are the best od Div 2. They usually get good positions at contests, and that causes them to get a very big rating change. Then they will turn International Master or high Master, which can be bad. Of course when they participate in Div 1 their rating will converge again. The graphs of people who are converging at CM usually get a very big jump at the end, and that is not how the model should work. I'm not suggesting to remove divsions, maybe just twist the formula a bit or something. I don't have many experinece with rating systems tough.

Thanks for reading!

Note: The point of this blog isn't to offend anyone.

A lot of people say that people downvote just because the one who commented has a low rating. That may exist, but it is not in the proportion people say.

This is a fact: higher rated users have more programming skill than lower rated, and they tend to share cool ideas for solving problems or writing tutorials. Most tutorials are written by high rated users. That is alredy a factor that makes high rated users get more contribution.

You can see lots of lower rated users asking questions regarding problems or even codeforces that can be easily googled. This sentence may be polemic, but this are statistical facts. Most spam content come from lower rated or even unrated (I'm still unrated )-:).

In conclusion: since this is a programming community, higher rated users tend to share more educational content than lower rated.

Hope this will make people stop arguing so much about ratism.

UPD: I don't get why it got downvotes. I just said the truth, because, in my opinion, all thoose people complaining about downvotes and ratism are quite annoying. People like to belive on what they feel more confortable with, and not the truth. I want to stop all thoose anti ratism people. Reposting this because ot got hidden :-(

Lots of cf users have hatefull comments and spam blogs. The most active ones (I know) are magic_coder and Robloxian. Please stop theese people. Also if you know other people in cf community that are like that comment bellow so that MikeMirzayanov can see and ban them (or something else)

Thanks.