from itertools import permutations

n = int(input())
A = list(map(int, input().split()))
B = list(map(int, input().split()))

max_n = 0
ans = 0
for P in permutations(range(n)):
    res = 0
    for i in range(n):
        if A[P[i]] >= B[i]:
            res += A[P[i]] - B[i]
    if res > max_n:
        max_n = res
        ans = 1
    elif res == max_n:
        ans += 1
print(ans)