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52 lines
726 B
52 lines
726 B
registers = { ?a => 0, ?b => 0, ?c => 1, ?d => 0 }
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pc = 0
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data = DATA.each_line.to_a
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while pc < data.size
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line = data[pc]
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case line
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when /cpy ([a-d]|\d+) ([a-d])/
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value = registers.fetch($1) { $1.to_i }
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registers[$2] = value
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pc += 1
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when /inc ([a-d])/
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registers[$1] += 1
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pc += 1
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when /dec ([a-d])/
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registers[$1] -= 1
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pc += 1
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when /jnz ([a-d]|\d+) (-?\d+)/
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value = registers.fetch($1) { $1.to_i }
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pc += value.zero? ? 1 : $2.to_i
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else
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raise "invalid line: #{line}"
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end
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end
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p registers
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__END__
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cpy 1 a
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cpy 1 b
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cpy 26 d
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jnz c 2
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jnz 1 5
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cpy 7 c
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inc d
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dec c
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jnz c -2
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cpy a c
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inc a
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dec b
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jnz b -2
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cpy c b
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dec d
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jnz d -6
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cpy 16 c
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cpy 17 d
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inc a
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dec d
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jnz d -2
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dec c
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jnz c -5
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