You don't say!

what's going on here?

I see. Thank you! And why 'return std::move(dna)' and not just 'return dna'?

I really liked this kata, but it's more a 6kyu, isn't it?

What is 'input >>= 4' doing?

I found that much more readable than the top solution.

Well...this is likely to have a quadratic time complexity, so I don't think it's best practise...

I did it in a programmatic way, because I am bad at math. So what?

That's beautiful.

Well, the kata description says 'The string has a length greater or equal to one and contains only letters from a-z'?

It's seems a general problem on codewars that 'best practise' is interpreted as 'short', regardless of efficiency or readability

I agree that the parameter names are poorly chosen, but instead of comments, you could just change them to more telling ones ;)

Is this really best practise? It iterates the string four times, doesn't it?

Ahm...what's going on here?