Already reported below.

PHP working for me. Maybe they fixed it.

I enjoyed this one. Great tests. This is a good problem for test driven development, and it shows. Two suggestions:

• State more explicitly in the problem that going out of bounds wraps around. The test for this was called "toroidal", but I didn't know what that meant.
• This problem seems more difficult than 4kyu. Personally I'd peg it at 3kyu or 2kyu.

Thanks.

It's already been approved.

; rdi = array (pointer)
; esi = size (unsigned int)