Arrays are always faster regardless of "complexity" since that only applies to mathematical functions limit to infinity and their growths, which is not how hardware behaves...

For anyone wondering: It is generally advised to return by value instead of moving, as std::move may prevent return value optimization.

You don't say!

This is a really bad idea, this is far from clever.

yea i am a novice and i understand this but takes a while before i know how the top one works

Bro nobody gets it!! it simply works LMAO

what's going on here?

I agree. It's more just a cool solution instead of the best solution.

This is my incomplete reading of the standard. I don’t write like that anymore, but in old katas such my code will be found.

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

A const is more or less just an int that represents an ascii value.
7097511 takes advantage of that by defining a new alphabet and then getting the corresponding letters.

Each hex character represents a 'nibble', or 4 bits. Shifting 4 bits to the right lets them read the upper nibble of the input, after having done the lower nibble.

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