You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
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map = ARGF.read.split("\n").map(&:chars)
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slopes = [
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[1, 1],
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[3, 1],
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[5, 1],
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[7, 1],
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[1, 2],
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]
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puts slopes.map {|dx,dy|
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x, y = 0, 0
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trees = 0
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until y >= map.length
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trees += 1 if map[y][x % map[0].size] == ?#
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x += dx
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y += dy
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end
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trees
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}.reduce(&:*)
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