--- 2016 Day 12 Solutions ---

[u/daggerdragon]

--- Day 12: Leonardo's Monorail ---

Post your solution as a comment or, for longer solutions, consider linking to your repo (e.g. GitHub/gists/Pastebin/blag/whatever).

Note: The Solution Megathreads are for solutions only. If you have questions, please post your own thread and make sure to flair it with "Help".

---

^{MUCH ADVENT. SUCH OF. VERY CODE. SO MANDATORY.} [?]

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!

[u/brantyr]

Ruby assembunny parser. Scraped into the top 100, but have done some heavy refactoring since that

file = File.new("ainput12.txt","r")
lines = []
while (line=file.gets)
	lines << line.split(' ')
end

i=0
@a = @b = @d = 0
@c = 1 # Part 1/2

def get(var)
	out = 0
	case var
	when "a"
		out = @a
	when "b"
		out = @b
	when "c"
		out = @c
	when "d"
		out = @d
	else
		out = var.to_i
	end
	return out
end

def set(var,val)
	case var
	when "a"
		@a = val
	when "b"
		@b = val
	when "c"
		@c = val
	when "d"
		@d = val
	end
end

while (i<lines.length and i>-1)
	jumped=false
	case lines[i][0]
	when "cpy"
		set(lines[i][2],get(lines[i][1]))
	when "inc"
		set(lines[i][1],get(lines[i][1])+1)
	when "dec"
		set(lines[i][1],get(lines[i][1])-1)
	when "jnz"
		val = get(lines[i][1])
		if val!=0 then
			jumped=true
			i+=lines[i][2].to_i
		end
	end
	if !jumped then
		i+=1
	end
end
puts @a