I just finished this, however, my first impression was that N was included as the integer component if the integer was 0 regardless of fraction part. So input of 0,0 --> N and input of 0,3 for instance -> N:.

Having completed the kata and reread it seems like this isn't the case and 0,3 would just be :. and N is only when 0,0. However, due to the lack of test cases I am still unsure.

It seems like this is worth clarifying in the description and/or in a test case. Thanks!

I can't tell if my code is somehow finding the gas prices wrong for some cases, but I am getting an error with some of the random cases and it seems like there are at least sometimes random tests where there is a tie so two sets of alterations have the same cost and same length.