let n, d, x = Scanf.scanf " %d %d %d" @@ fun a b c -> a, b, c
let a_s = Array.init n @@ fun _ -> Scanf.scanf " %d" (+) 0
let _ = Array.fold_left (fun c a -> c + (d - 1) / a + 1) 0 a_s |> (+) x |> Printf.printf "%d\n"