Hi,
Do you know how to do an "either or" for tags while filtering problems? For example, if you are looking through the problems in the problem set tab, if you want problems that are either binary search or greedy (not necessarily both), how do you do that? If I try using "add tag", it only gives problems that have both of these tags.
Great question, you should ask MikeMirzayanov to add that feature to Codeforces :)
there is a "*combine tags with or" tag
If this was Stack Overflow: Answer Accepted!