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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available, desired = DATA.read.split("\n\n")
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available = available.split(", ")
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desired = desired.lines(chomp: true)
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available_r = Regexp.new("^(#{available.join(?|)})+$")
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pp desired.select { _1 =~ available_r }.size
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ways = Hash.new {|h,k|
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h[k] = available
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.select { k.start_with?(_1) }
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.map { k.sub(_1, "") }
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.sum { h[_1] }
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}
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ways[""] = 1
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pp desired.sum { ways[_1] }
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__END__
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r, wr, b, g, bwu, rb, gb, br
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brwrr
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bggr
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gbbr
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rrbgbr
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ubwu
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bwurrg
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brgr
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bbrgwb
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