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15 lines
428 B
15 lines
428 B
patterns = ARGF.read.split("\n\n")
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.map { _1.split("\n").map(&:chars) }
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def find_fold(pattern)
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(0.5...pattern.length-0.5).step(1).find {|fold|
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a = pattern[0..fold.floor]
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b = pattern[fold.ceil..]
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a.reverse.zip(b).reject { _1.any?(&:nil?) }.all? { _1 == _2 }
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}&.ceil
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end
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verts = patterns.map { find_fold(_1.transpose) }.compact
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hors = patterns.map { find_fold(_1) }.compact
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p verts.sum + hors.sum { _1 * 100 }
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