Now codeforces has a small number of tags which make it almost impossible to look for distinct topic. I think it would be more convinient to have more tags to look for problems when you want to practice some topics. Is there any reason why codeforces cannot give a permission to high rated people to add their own tags?
Auto comment: topic has been updated by welleyth (previous revision, new revision, compare).
I agree, sometimes it's really hard to find a problem by existing tags