25 lines
496 B
Ruby
25 lines
496 B
Ruby
if File.exists?("input.txt")
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file = File.open("input.txt")
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file_data = file.read
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file.close
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else
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file_data = "xmul(2,4)&mul[3,7]!^don't()_mul(5,5)+mul(32,64](mul(11,8)undo()?mul(8,5))"
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end
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#puts file_data
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sane_data = file_data.gsub(/don\'t\(\).*?do\(\)/m, "").scan(/mul\(\d+,\d+\)/)
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#puts sane_data.inspect
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numbers = sane_data.map do |item|
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item.scan(/\d+/).map(&:to_i)
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end
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#puts numbers.inspect
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result = 0
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for mul in numbers do
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result = result + mul[0] * mul[1]
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end
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puts result
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