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63 lines
946 B
63 lines
946 B
6 days ago
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registers, program = DATA.read.split("\n\n")
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a, b, c = registers.scan(/\d+/).map(&:to_i)
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program = program.scan(/\d+/).map(&:to_i)
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combo = ->(operand) {
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case operand
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when 0, 1, 2, 3 then operand
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when 4 then a
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when 5 then b
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when 6 then c
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else
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fail
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end
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}
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ip = 0
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out = []
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while (0...program.size).cover?(ip)
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opcode = program.fetch(ip)
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operand = program.fetch(ip+1)
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case opcode
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when 0
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a = (a / 2**combo[operand]).to_i
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ip += 2
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when 1
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b = b ^ operand
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ip += 2
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when 2
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b = combo[operand] % 8
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ip += 2
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when 3
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if a.zero?
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ip += 2
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else
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ip = operand
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end
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when 4
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b = b ^ c
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ip += 2
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when 5
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out << combo[operand] % 8
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ip += 2
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when 6
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b = (a / 2**combo[operand]).to_i
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ip += 2
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when 7
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c = (a / 2**combo[operand]).to_i
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ip += 2
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else
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fail
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end
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end
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puts out.join(?,)
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__END__
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Register A: 729
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Register B: 0
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Register C: 0
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Program: 0,1,5,4,3,0
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