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21 lines
575 B
21 lines
575 B
12 months ago
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workflows, parts = ARGF.read.split("\n\n")
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Part = Data.define(:x, :m, :a, :s)
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parts = parts.lines(chomp: true).map { Part.new(**eval(_1.gsub(?=, ?:))) }
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workflows = workflows.scan(/(\w+)\{((?~}))\}/).to_h {|name, rules|
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rules = rules.split(?,).map {|rule|
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rule.include?(?:) ? rule.split(?:) : ["true", rule]
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}
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[name, rules]
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}
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pp parts.select {|part|
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workflow = "in"
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until %w[A R].include?(workflow) do
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workflow = workflows.fetch(workflow).find {|cond,_| part.instance_eval(cond) }.last
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end
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workflow == ?A
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}.sum { _1.instance_eval { x + m + a + s }}
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