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48 lines
915 B
48 lines
915 B
5 years ago
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OPCODES = ARGF.read.split(?,).map(&:to_i)
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# opcodes[1] = 12
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# opcodes[2] = 2
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# pc = 0
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# loop do
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# p opcodes
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# case opcodes[pc]
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# when 1
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# opcodes[opcodes[pc+3]] = opcodes[opcodes[pc+1]] + opcodes[opcodes[pc+2]]
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# pc += 4
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# when 2
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# opcodes[opcodes[pc+3]] = opcodes[opcodes[pc+1]] * opcodes[opcodes[pc+2]]
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# pc += 4
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# when 99
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# puts opcodes[0]
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# exit
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# end
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# end
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def run(noun, verb)
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memory = OPCODES.dup
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memory[1] = noun
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memory[2] = verb
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pc = 0
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loop do
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case memory[pc]
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when 1
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memory[memory[pc+3]] = memory[memory[pc+1]] + memory[memory[pc+2]]
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pc += 4
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when 2
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memory[memory[pc+3]] = memory[memory[pc+1]] * memory[memory[pc+2]]
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pc += 4
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when 99
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return memory[0]
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end
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end
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end
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(0..99).each do |noun|
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(0..99).each do |verb|
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value = run(noun, verb)
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puts 100 * noun + verb and exit if value == 19690720
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end
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end
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