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claims, fabric = ARGF
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.read
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.lines
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.map(&:chomp)
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.reject(&:empty?)
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.each
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.with_object([[], Hash.new {|h,k| h[k] = []}]) { |line, (claims, fabric)|
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line =~ /^#(\d+) @ (\d+),(\d+): (\d+)x(\d+)$/
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claim = $1.to_i
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x = $2.to_i
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y = $3.to_i
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width = $4.to_i
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height = $5.to_i
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claims << claim
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width.times {|dx|
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height.times {|dy|
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fabric[[y+dy, x+dx]] << claim
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}
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}
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}
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p claims.reject {|claim|
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fabric.any? {|_,v|
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v.length > 1 && v.include?(claim)
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}
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}
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