68 lines
1.2 KiB
Ruby
68 lines
1.2 KiB
Ruby
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#!/usr/bin/env ruby
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input = (ARGV.first.nil? ? DATA : ARGF)
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.readlines(chomp: true)
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split = input.index("")
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gates = input[split+1..]
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wires = input.join(" ").scan(/([a-z0-9]{3})/).flatten.uniq.map { [_1, nil] }.to_h
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input[...split]
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.map { _1.split(": ") }
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.each { wires[_1] = _2.to_i }
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i = 0
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until gates.empty?
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if i >= gates.size
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i = 0
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end
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gate = gates[i]
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in1, op, in2, out = gate.scan(/([a-z0-9]{3}) ([A-Z]+) ([a-z0-9]{3}) -> ([a-z0-9]{3})/).first
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if wires[in1].nil? || wires[in2].nil?
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i += 1
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next
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end
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case op
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when "AND"
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wires[out] = wires[in1] & wires[in2]
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when "OR"
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wires[out] = wires[in1] | wires[in2]
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when "XOR"
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wires[out] = wires[in1] ^ wires[in2]
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end
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gates.delete(gate)
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end
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x = wires.select { _1.match?(/^x/) }.sort_by(&:first).map { _1.last.to_s }.reverse.join
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xi = x.to_i(2)
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y = wires.select { _1.match?(/^y/) }.sort_by(&:first).map { _1.last.to_s }.reverse.join
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yi = y.to_i(2)
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z = wires.select { _1.match?(/^z/) }.sort_by(&:first).map { _1.last.to_s }.reverse.join
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zi = z.to_i(2)
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p zi
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__END__
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x00: 0
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x01: 1
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x02: 0
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x03: 1
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x04: 0
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x05: 1
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y00: 0
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y01: 0
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y02: 1
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y03: 1
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y04: 0
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y05: 1
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x00 AND y00 -> z05
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x01 AND y01 -> z02
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x02 AND y02 -> z01
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x03 AND y03 -> z03
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x04 AND y04 -> z04
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x05 AND y05 -> z00
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