import strutils, sequtils, algorithm

let
  N = parseInt readLine stdin
let
  a = map(split readLine stdin, parseInt).sorted(cmp)
var
  cnt: tuple[mn, mx: int] = (int.high, a[^1] - a[0])

for i in 1 ..< N:
  cnt.mn = min(cnt.mn, a[i] - a[i - 1])

echo cnt.mn
echo cnt.mx