let () =
  let d = read_int () in
  let d = d * 108 |> string_of_int in
  let n = String.length d in
  let rec doit i =
    if i = n then print_newline ()
    else begin
      if i = n - 2 then print_char '.';
      print_char d.[i];
      doit (i + 1)
    end in
  doit 0