can somebody explain math behind it? how did you even came up with this solution?

whatever, you were right, i was just stuck on one particular test, and after few more optimizations i finally did it T_T
thank you for this kata, it was bothering me for 2 weeks

as i said, sometimes it stops on 48, sometimes on 52, with around the same 0-1ms solution per test
so it looks more like it loads something for the first 11+ seconds, and then runs my code for 0.5 last seconds, and not being able to complete all the tests

got most of my tests in like 0-1 ms, with longest one ~190ms but yet timeout for some reason
http://prntscr.com/u71s6h
how can this be possible?

note: its not looking like i'm stuck on some particular test, it just drops on ~48-52 randomly