import itertools


n = int(input())
a = list(map(int, input().split()))
b = list(map(int, input().split()))


max_ = 0
for ptn in itertools.permutations(a):
    tmp = 0
    for aa, bb in zip(ptn, b):
        tmp += max(aa - bb, 0)
    max_ = max(max_, tmp)

ans = 0
for ptn in itertools.permutations(a):
    tmp = 0
    for aa, bb in zip(ptn, b):
        tmp += max(aa - bb, 0)
    if tmp == max_:
        ans += 1
print(ans)