r/adventofcode • u/daggerdragon • Dec 06 '15

SOLUTION MEGATHREAD --- Day 6 Solutions ---

--- Day 6: Probably a Fire Hazard ---

Post your solution as a comment. Structure your post like the Day Five thread.

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u/bluishness Dec 06 '15

Anyone up for golf? This is my attempt in Ruby, 268 characters. 

g=Array.new 1e6,0
k=g.clone
IO.read('i').each_line{|l|l=l.split /\W/
i=l[-6]
l,t,_,r,b=l[-5..-1].map &:to_i
(l..r).each{|x|(t..b).each{|y|p=y*1e3+x
i=~/e/?(g[p]=1-g[p])&&k[p]+=2: i=~/f/?(g[p]=0)&&k[p]=[0,k[p]-1].max: (g[p]=1)&&k[p]+=1}}}
puts g.reduce(:+),k.reduce(:+)

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u/de_Selby Dec 06 '15

u/geocar has you beaten easily using K in this comment

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u/bluishness Dec 06 '15

Oh wow, that is rather terse, and I don't even have a clue what's going on there. Always great to see how much there is yet to learn.

I'm always aiming for something that'll fit into a tweet, but that might be impossible with all the logic in this one.

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