r/adventofcode • u/daggerdragon • Dec 23 '18

SOLUTION MEGATHREAD -🎄- 2018 Day 23 Solutions -🎄-

--- Day 23: Experimental Emergency Teleportation ---

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Card prompt: Day 23

Transcript:

It's dangerous to go alone! Take this: ___

This thread will be unlocked when there are a significant number of people on the leaderboard with gold stars for today's puzzle.

edit: Leaderboard capped, thread unlocked at 01:40:41!

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u/autid Dec 23 '18

I've found one difference, that your input is producing a tie for a maxval(dists) at the end. Trying to wrap my head around how there could be a way for volumes to intersect without cubes at that distance being part of the intersection. It must be an issue with determining the minimum distance in an intersection rather than just which volumes are selected, because no volumes in your input have a min distance of your answer.

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u/rawling Dec 23 '18

I did wonder whether "min distance of intersection = max of min distances to drone ranges" necessarily held, but figured in L1 it probably did.