fun readInt () =
    valOf (TextIO.scanStream (Int.scan StringCvt.DEC) TextIO.stdIn)


exception E
fun findMin l =
    let
        fun findMinAux (nil, _) = raise E
          | findMinAux (_ :: nil, acc) = acc
          | findMinAux (h1 :: h2 :: tl, acc) =
            findMinAux (h2 :: tl, Int.min (h2 - h1, acc))
    in
        findMinAux (l, 200000)
    end


fun findMax l =
    List.last l - List.hd l


val () =
    let
        val n = readInt ()
        val a_s = List.tabulate (n, fn _ => readInt ())
    in
        (
          print (Int.toString (findMin a_s) ^ "\n");
          print (Int.toString (findMax a_s) ^ "\n")
        )
    end