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40 lines
720 B
40 lines
720 B
10 months ago
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input = ARGF.read
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def cubes(input)
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input
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.scan(/(\d+) (\w+)/)
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.to_h(&:reverse)
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.transform_values(&:to_i)
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end
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bag = cubes("12 red cubes, 13 green cubes, and 14 blue cubes")
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Game = Data.define(:id, :reveals) do
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def possible?(bag)
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reveals.all? {|reveal|
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bag.all? {|color, n| n >= reveal.fetch(color, 0) }
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}
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end
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end
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games = input
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.scan(/^Game (\d+): ((?~\n))/)
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.map {|id, reveals|
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Game.new(
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id.to_i,
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reveals.split(?;).map { cubes(_1) }
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)
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}
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# part one
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p games.select { _1.possible?(bag) }.sum(&:id)
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# part two
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p games
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.map {|game|
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game.reveals.inject {|bag, reveal|
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bag.merge(reveal) { [_2, _3].max }
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}
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}
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.sum {|bag| bag.values.inject(:*) }
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