Which language does not have that example test already?

This should absolutely not be happening; pyramids are fully intended to be triangular from 1.

Please state the language that has this problem ( test suites are different per language ), and ( where applicable ) make sure you are not mutating the input; this can lead to unexpected results.

( If your language is JS, which it seems to be, I really don't see how this is possible with the current test suite, even when mutating inputs. )

added to Ruby

done + added random tests

i had to replace the reference solution though, it seemed to be wrong

Not gonna happen anymore.

It's a 4kyu kata and it has an appropriate tag. I'm conflicted. How much do you want to spell out brute force won't cut it?

Ask in Discord#reviewing. There is someone who speaks Lua there.

Yes.

Look at the tags,

Look at the tags

JS has random tests

C# version also tests negative numbers while other translations don't.