INF = 10000000000000
def f(i):
return -1 if i == INF else i
n = int(input())
l = sorted([*map(int, input().split())])
a, b = [INF] * 2
for i in range(1, n):
diff = l[i] - l[i - 1]
if diff % 2 == 0:
a = min(a, diff)
else:
b = min(b, diff)
for i in range(2, n):
diff = l[i] - l[i - 2]
if diff % 2 == 0:
a = min(a, diff)
else:
b = min(b, diff)
print(f(a), f(b))