Scanf.scanf "%d" (fun n ->
    let a = Array.init n (fun _ -> Scanf.scanf " %d" (fun a -> a)) in
    Array.sort compare a;

    let calc head leg =
       (2 * head - leg / 2), (leg / 2 - head)
    in

    let x, y =
        if a.(0) <> a.(n - 1) then calc n (a.(0) + 4) else (
            if a.(0) + 2 = n * 2 then n, 0 else 0, n
        )
    in
    Printf.printf "%d %d\n" x y
)