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24 lines
600 B
24 lines
600 B
5 years ago
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wire_paths = ARGF.read.lines.map {|l|
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l.split(?,).map {|i| [i[0], i[1..-1].to_i] }
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}
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wire_points = wire_paths.map {|path|
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path.each.with_object([[0, 0]]) {|(dir, length), points|
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x, y = points.last
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length.times {|i|
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points << case dir
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when ?R then [x+i+1, y]
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when ?U then [x, y+i+1]
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when ?L then [x-i-1, y]
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when ?D then [x, y-i-1]
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end
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}
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}
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}
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intersections = wire_points[0] & wire_points[1]
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intersections.delete([0, 0])
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distances = intersections.map {|(x, y)| x.abs + y.abs }
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puts distances.min
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