require 'pp'

cities = {}

File.open(File.dirname(__FILE__) + "/distance.txt").readlines.each_with_index do |line, index|
  columns = line.split(/\s+/)
  cities[columns.shift] = {
    :index => index,
    :distance => columns.map { |c| c =~ /\-/ ? nil : c.to_i }
  }
end

pp cities