N =int(input())
l =list(map(int, input().split()))
min =l[1]-l[0]
for i in range(N-1):
    if min > l[i+1] -l[i]:
        min =l[i+1] -l[i]
        if min ==0:
            print(l[i+1],l[i])
            break
print(min)
print(l[-1]-l[0])