input = File.read('input_13.txt').gsub(" ","").split("\n").map do |x| x.split(":") end.to_h
#input = {0 => 3, 1 => 2, 4 => 4, 6 => 4}
input = input.map do |k, v| [k.to_i, v.to_i] end.to_h

def round_trip a
    (a*2)-2
end

def do_count input
  input.keys.reduce(0) do |mem, time|
   p "Time: " + time.to_s
   p "Range: " + input[time].to_s
   p "Calc: " + (time % (round_trip input[time])).to_s
    if time % (round_trip input[time]) == 0 then
      cost = time * (input[time])
      mem += cost
    else mem
    end
  end
end

def do_count_with_delay input
  i = 0
  while true do
    res = 0
    input.keys.each do |time|
      if (time+i) % (round_trip input[time]) == 0 then
        res = 1
      end
    end
    if res == 0 then
      return i
    end
    i += 1
  end
end



p do_count input
p do_count_with_delay input