from itertools import permutations
n = int(input())
A = list(map(int, input().split()))
B = list(map(int, input().split()))
mx = -1
for p in permutations(A):
    mx = max(mx, sum(max(0, x-y) for x,y in zip(p, B)))
cnt = 0
for p in permutations(A):
    cnt += sum(max(0, x-y) for x,y in zip(p, B)) == mx
print(cnt)