import sequtils,strutils
var
    n = stdin.readline.parseInt
    A = stdin.readline.split.map(parseInt)
    m,M : int
M = A[n-1] - A[0]
m = int.high
for i,a in A:
    if i == 0:
        continue
    m = min(m, a - A[i - 1])
echo m
echo M