function templates question

Question

The question is in this code:

https://code.sololearn.com/cU8MTv4W733j/?ref=app

This code wasn't written by me. It was a solution to a question I had. I added the comment.

Answer 1

Basically the compiler can infer the correct type when possible, so you can leave those arguments out.

Read this article

https://en.cppreference.com/w/cpp/language/template_argument_deduction