not sure if it was me, but i _did_ upvote when it had no answers since i found it interesting and well-specified. was planning to golf it myself until i realized plugging in a double sum into wolfram alpha yields a shorter python solution than actually trying to optimize that sum in more typical ways. then spent some time thinking about maybe using a more concise language before deciding against it
a bit too late for the 8888 rep thing now, but there's quite a few recent closed posts, two of which are challenges. not saying you should necessarily downvote them though -- for starters, your …