import itertools
n = int(input())
alst = list(map(int, input().split()))
blst = list(map(int, input().split()))
max_ = -1
ans = 0
for lst in itertools.permutations(alst):
    total = 0
    for a, b in zip(lst, blst):
        total += max(a - b, 0)
    if max_ == total:
        ans += 1
    elif max_ < total:
        max_ = total
        ans = 1
print(ans)