Here are two links that lead to the same problem, Ugly Expression Probability by Daniel Liu.
1) Link 1
2) Link 2
If you follow both these links, you'll see that there are two [not that much] different solutions posted by two different users.
My question would be how did this problem come to have two direct links? Could the staff look into this?
PS: I am aware that after switching to this new format, some old problems got new links. But the problem I'm talking about here is not old. It's new.
EDIT: Here's something absolutely crazy. Try liking the problem from link 1. Then go your 'liked' feed. What do you see?
EDIT 2: The thing is Daniel Liu's Ugly Expression Probability [link 1] and Sreejato Bhattacharya's Find the Angle have this in common: /?group=sMpckcoT8pTx.