I must redeem myself for last week when I proved 70g impossible with a length 2 arm and didn't even try a length 1 arm. But is this even min area? Is this min cost? Should I have waited until the last four hours of the contest to start coding this? Probably not on all counts.

(Btw the lower track is only used once at the very end. Maybe if I had used it from the beginning I wouldn't have consumed enough cycles to feed a family of four.)