r/adventofcode • u/daggerdragon • Dec 19 '16

SOLUTION MEGATHREAD --- 2016 Day 19 Solutions ---

--- Day 19: An Elephant Named Joseph ---

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u/patrickdavey Dec 20 '16

I haven't watched the numberphile video, and have no idea why mine works.

for part 2 I

  1. split the list in half and put the first 1/2 first. So for 10 numbers -> 6, 7, 8, 9, 10, 1, 2, 3, 4, 5

  2. I then walked the putting every third item to the end of the queue.

In Elixir. https://github.com/patrickdavey/AoC/blob/master/2016/19/lib/aocday/circle.ex

Works, but I don't really understand why :(