75 such tests

Approved

Haha! You know it is possible, but your cached bitset works better. Bravo!

It did when I posted it :)

Fixed.

Same, it's tragic that the testing framework's It macro makes including <range/v3/all.hpp> impossible. Any brevity you are able to achieve is offset by the gazillion lines of import above it :(

Agreed, but I also think that even with those utilities, this task isn't trivial to do correctly. Of course, if you copy everything and turn things into lvalues, it is. But it took me 30 minutes to put together a solution that keeps value categories intact. I assumed there would be tests for that, and also the caching, but apparently not

Thank you for reply + couple of keywords) Im trying to find purpose for "kumite" thing thus bothering people around.. that the spirit, i guess
gotta have some fun with llvm intermediates x)

C-style cast makes it 98% close. XD
Your idea with ranges sounds great.

That was my approach too

This kata needs a complete overhaul. Better input/output format, test verification and random test generator. Author has left the building and I ain't touching the current C++ and C# code. Let's retire this and make the 8x8 variation the author hinted at in the description.

Changed to array of 2 vectors of integers.

This is a great kata, but I agree, the function prototype is not good.