A reference solution, "OK you did it - here's another way", would be super-useful for learning. I know that I can complete most any kata, but I don't always kn

A reference solution, "OK you did it - here's another way", would be super-useful for learning. I know that I can complete most any kata, but I don't always know if I'm doing it the most efficient way under constraints of implementation time, memory or speed.