34 lines
947 B
Ruby
34 lines
947 B
Ruby
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input = File.read("input-16.txt").strip.split(",")
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#input = "s1,x3/4,pe/b".split(",")
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matcher = /([s,p,x])(?:(\w*\/\w*)|(\w+))/
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line = ('a'..'p').to_a
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lines = []
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#line = ('a'..'e').to_a
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# Found cycles after 60 runs
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actual_tries = 1000000000 % 60
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(1..actual_tries).each do |i|
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lines << line.dup
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input.each do |s|
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match_data = (s.match matcher).to_a
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match_data[1] = match_data[1].to_sym
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case match_data[1]
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when :s
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line.rotate! -(match_data[3].to_i)
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when :x
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positions = match_data[2].split "/"
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line[positions[0].to_i], line[positions[1].to_i] = line[positions[1].to_i], line[positions[0].to_i]
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when :p
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buds = match_data[2].split "/"
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index_0, index_1 = line.find_index(buds[0]), line.find_index(buds[1])
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line[index_0], line[index_1] = line[index_1], line[index_0]
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end
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end
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# if lines.include? line then
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# p "Cycle found after: #{i.to_s}"
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# break
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# end
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end
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p line.join
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