50 lines
1.3 KiB
Crystal
50 lines
1.3 KiB
Crystal
lines = File.read("day5.txt").chomp.split(",").map(&.to_i32)
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def run(lines, input)
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output = [] of Int32
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pos = 0
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get = ->(x : Char, p : Int32) {
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x == '0' ? lines[lines[pos+p]] : lines[pos+p]
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}
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loop do
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str = "000" + lines[pos].to_s
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case str
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when .ends_with?("1")
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lines[lines[pos+3]] = get.call(str[-3], 1) + get.call(str[-4], 2)
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pos += 4
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when .ends_with?("2")
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lines[lines[pos+3]] = get.call(str[-3], 1) * get.call(str[-4], 2)
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pos += 4
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when .ends_with?("3")
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lines[lines[pos+1]] = input.pop
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pos += 2
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when .ends_with?("4")
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output << get.call(str[-3], 1)
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pos += 2
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when .ends_with?("5")
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if get.call(str[-3], 1) != 0
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pos = get.call(str[-4], 2)
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else
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pos += 3
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end
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when .ends_with?("6")
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if get.call(str[-3], 1) == 0
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pos = get.call(str[-4], 2)
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else
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pos += 3
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end
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when .ends_with?("7")
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lines[lines[pos+3]] = (get.call(str[-3], 1) < get.call(str[-4], 2)) ? 1 : 0
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pos += 4
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when .ends_with?("8")
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lines[lines[pos+3]] = (get.call(str[-3], 1) == get.call(str[-4], 2)) ? 1 : 0
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pos += 4
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when .ends_with?("99")
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break
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else
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raise "aahhh #{str}"
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end
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end
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{output, lines}
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end
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puts run(lines, [5])
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