this post was submitted on 01 Dec 2023
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The official awful.systems Advent of Code 2023 thread (awful.systems)
submitted 11 months ago* (last edited 11 months ago) by gerikson@awful.systems to c/notawfultech@awful.systems
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[–] zogwarg@awful.systems 2 points 11 months ago

discussionIn retrospect that would have been far better for runtime, my dist function ended up being a tad expensive.

I substituted the rows/columns, with multiplication by the expansion rate if they were all numbers. And then for each galaxy pair do a running sum by going “down” the “right” and adding the distance for each row and column crossed.

https://github.com/zogwarg/advent-of-code/blob/main/2023/jq/11-b.jq

transpose is nice to have in that approach.