defmodule Main do
  def main do
    IO.gets("")
    |> String.trim()
    |> String.to_charlist()
    |> Enum.map(fn c ->
      to_string([c])
      |> String.to_integer()
      |> (fn n ->
            cond do
              n == 0 -> 10
              true -> n
            end
          end).()
    end)
    |> Enum.sum()
    |> IO.puts()
  end
end