Scanf.scanf "%d" (fun n ->
    let z = 998244353 in
    let ( *@) a b = (a * b) mod z in
    let ( /@) a b =
        let extgcd x y =
            let rec eg r0 r1 a0 a1 =
                if r1 = 0 then a0 else
                    let q1 = r0 / r1 in
                    eg r1 (r0 mod r1) a1 (a0 - q1 * a1)
            in
            eg x y 1 0
        in
        let inv x y = (* 1/x in mod y *)
            let c = extgcd x y in
            if c < 0 then c + y else c
        in
        a *@ inv b z
    in
    let a = Array.init n (fun _ -> Scanf.scanf " %d" (fun a -> a)) in
    let sum = Array.fold_left (+) 0 a in
    Printf.printf "%d\n" @@ (sum /@ n)
)