As I was scrolling through past problems today, I found myself thinking: This problem is wayyyy too easy for xxx(x).
For other CP websites such as Luogu, I know that problem difficulty tags are updated as the years pass in order to be more consistent with the modern difficulties(e.g. a 2100 problem back then may only be a 1800 or 1900 problem in the current times).
What about CF?
