22 lines
503 B
Ruby
22 lines
503 B
Ruby
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require 'matrix'
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input = File.read("input_11.rb").strip.split(",").map(&:to_sym)
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HEX_DIRS = {
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:n => Vector[0,1,-1], :ne => Vector[-1,1,0],
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:se => Vector[-1,0,1], :s => Vector[0,-1,1],
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:sw => Vector[1,-1,0], :nw => Vector[1,0,-1]
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}
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def dist path
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path.reduce({:vec => Vector[0,0,0], :lol => 0}) do |mem,step|
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mem[:vec]= new = mem[:vec] + HEX_DIRS[step]
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mem[:lol] = [new.map(&:abs).sum / 2, mem[:lol]].max
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mem
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end
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end
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out = dist input
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p out[:vec].map(&:abs).sum / 2, out[:lol]
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