A couple of us disagreed (in comments) on whether titles that are nothing more than external references, such as "Advent of Code 2019 Day 3, Part 3" and "Project Euler nº 5", are reasonable.
I believe that such titles are meaningless, and reviewers want some idea of the problem domain when deciding whether to read a question, but there seems to be a precedent for such titles.
Should these titles be edited to summarise the problem statement?
(N.B. this particular question has only a link to the problem statement, and no description in the question itself, so it's unarguably off-topic until that's fixed; I'm only asking about the question title.)