Really enjoyed this one. It’s a small problem on the surface, but it nudges you to think carefully about representation and consistency rather than brute force. I liked how it naturally leads you toward a clean, readable approach instead of something overcomplicated. Thanks for putting together a kata that rewards clarity over clever tricks.

I tought whats wrong with my code. that one zero....

Thanks :)

C translation (author gone)

C++ translation

Coffeescript

Crystal

Julia

(author inactive)

Please use new python test framework.

Ruby translation kumited :) please review and approve ~~

Fixed

Approved

Also added sample tests.