Every time after a contest, the Codeforces blog Rule about third-party code is changing is flooded with comments asking for Mike to review submissions, some of which are because of people sharing the same template and are otherwise distinct.

There is a solution that can handle these claims: ask users to submit a template before the contest, possibly as part of the settings, and can come in the form of a CF submission (so they can just input a submission ID). During the contest, they cannot edit the template, and similarities solely because of the template will not be considered when determining plagiarism.

I'm not familiar with how the plagcheck system works, but I'd like to ask for your opinions: is this feasible, and is this a good idea?