My point is clear: even a single kangaroo must be fast. If your kangs jump 46K per seconds each - you are on the right way 
Though usually with this approach you will suffer from slow inversion.
Though usually with this approach you will suffer from slow inversion.
thx. Well said, usually - since you basically solved 120 single-handed, I'm sure we both know this isn't the case, unless it's coded by a 1st year college student (or forked from github, which may be even worse). Or is it? Let's leave this as a mistery at least for a while, please, probably less than 3 guys here may understand it. You seem to know a few things, mister...