file = open('15B.txt')
n = int(file.readline())
A = []
for i in range(n):
    A += [int(file.readline())]

Max = 0
for i in range(n):
    for j in range(i + 1, n):
        if abs(A[i] - A[j]) % 80 == 0:
            Max = max(Max, abs(A[i] - A[j]))
print(Max)

k = [[]for i in range(80)]
for i in range(n):
    x = A[i]
    ost = x % 80
    k[ost] += [x]
ans = 0
for i in range(80):
    k[i].sort()
    if len(k[i]) >0:
        ans = max(ans, k[i][-1] - k[i][0])

print(ans)