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Advent of Code 2019 - Day 10

#2019#advent-of-code
sb8244

sb8244

Author of Real-Time Phoenix

Advent of Code 2019 - Day 10

Note: This topic is to talk about Day 10 of the Advent of Code 2019 .

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sb8244

sb8244

Author of Real-Time Phoenix

My solution is here. I actually documented the approach in pt1 / pt2 at the top. I won’t paste it here to avoid spoilers, it’s still early on the day.

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Post #2
ferd

ferd

Author of Property-Based Testing with PropEr, LYSE, & Erlang in Anger

High school math is needed, but I decided to avoid it for as long as I can. It takes about 2 hours to get the whole thing going (and I’ve had to spend my morning, lunch, and breaks on this!) but I end up with a fully functional solution for arbitrary-sized maps and positions. It ought to be fast enough, finding both the solution to part 1 and part 2 in under 100ms combined by doing some fancy filtering.

Source at day10.erl · GitHub

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Post #12
cblavier

cblavier

My solution : advent/lib/2019/day10 at master · cblavier/advent · GitHub

Wasted at least 1 hour this morning going totally wrong (I was only dealing with 8 different angles) :exploding_head:

And then I used the high school maths mentioned by @ferd :wink:

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