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37 lines
716 B
37 lines
716 B
diagram = ARGF.read.split("\n").map(&:chars)
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dir = [0, 1]
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y = 0
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x = diagram[y].index(?|)
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begin
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steps = 0
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loop do
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case diagram[y][x]
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when ?+
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dir = if dir[0] == 0 # going vertically
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if (diagram[y][x-1] || " ") != " "
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[-1, 0]
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else
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[1, 0]
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end
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else # going horizontally
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if (diagram[y-1][x] || " ") != " "
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[0, -1]
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else
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[0, 1]
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end
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end
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when /[a-z]/i
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# print diagram[y][x]
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when /\||\+|-/
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else
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raise diagram[y][x]
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end
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x,y = [x,y].zip(dir).map {|a,b| a + b}
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steps += 1
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end
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rescue
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puts steps
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end
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