Scanf.scanf "%d" (fun n ->
    let a = Array.init n (fun _ -> Scanf.scanf " %d" (fun a -> a)) in
    Array.sort compare a;
    let rec loop i acc =
        if i = n then acc else loop (i + 1) (min acc (a.(i) - a.(i - 1)))
    in
    let m = loop 1 max_int in
    Printf.printf "%d\n%d\n" m (a.(n - 1) - a.(0))
)