(* O(n) (n = |s|) *)
let string_count f s =
  let count = ref 0 in
  String.iter (fun c -> if f c then incr count) s;
  !count

let solve s = 700 + string_count ((=) 'o') s * 100

let _ = read_line () |> solve |> string_of_int |> print_endline