let solve l wlst =
  let rec solve' wlst sumw result =
    match wlst with
    | [] -> result
    | x::xs ->
      if (x + sumw) > l then result
      else solve' xs (sumw + x) (result + 1)
  in
  let wlst' = List.sort compare wlst in
  solve' wlst' 0 0

let () =
  let l = read_line () |> int_of_string
  and _ = read_line ()
  and wlst = read_line () |>
             Str.split (Str.regexp_string " ") |>
             List.map int_of_string
  in
  solve l wlst |> string_of_int |> print_endline