codeiq.rb

inputs = []
while str = STDIN.gets.chomp
  break if str.empty?
  inputs.push str.split(',').collect {|i|i.to_i}
end

class Amida
  def initialize (yokobous)
    @yokobous = yokobous.clone
    @amida_length = @yokobous[0].length + 1
    @lines = []
  end

  def resolve
    (1..@amida_length).each do |count|
      line = Line.new count
      @yokobous.each {|yokobou| line.next yokobou}
      @lines.push line
    end
    @lines.collect{|line| line.x}.join(',')
  end

end

class Line
  attr_accessor :x

  def initialize(x)
    @x = x
    @level = 0
  end

  def next(yokobou)
    @level += 1

    if yokobou.empty? then
      return @x
    end

    left_index = @x - 2
    right_index = @x - 1
    if left_index >= 0 and yokobou[left_index] == 1 then
      @x -= 1
    elsif yokobou[right_index] == 1 then
      @x += 1
    end
  end

end

amida = Amida.new inputs
puts amida.resolve()