Hello everyone I am new to codeforces and this is my first blog on codeforces. What I noticed is that unlike some other platforms the difficulty ratings of the contest questions on codeforces are updated after a huge delay (ratings of problems in a contest 15 days ago are still not updated). Is it really difficult to update the difficulty rating of a problem or is there any other reason?. I would be thankful if someone could tell me the reason.