Solution for "sunloverz / gist:6309925" on ruby

rectangularGrid.rb

class RectangularGrid
 def countRectangles(n,m)
  sum = 0
  for i_n in 1..n
   for i_m in 1..m
    if i_m != i_n
      sum = sum + (m-i_m+1)*(n-i_n+1)
    end
   end
  end
  return sum
 end
end

r = Rect.new
puts r.countRectangles(3,3)
puts r.countRectangles(2,5)
puts r.countRectangles(592,964)