simonkro

def roman_to_arabic
  {'M' => 1000, 'CM' => 900, 'D' => 500, 'CD' => 400, 
   'C' => 100,  'XC' => 90,  'L' => 50,  'XL' => 40, 
   'X' => 10,   'IX' => 9,   'V' => 5,   'IV' => 4, 
   'I' => 1}
end

def to_roman n
  roman_to_arabic.map do |roman, arabic|
    i, n = n.divmod(arabic)

simonkro

# solves the puzzle from https://gist.github.com/1925593
# unpolished version - i'm tired

input = (<<EOF).split("\n").map{|row| row.split(//).map(&:intern)}
-------------
|           |
|           U
|*   * * * *|
|           |
|     #     |