from itertools import permutations

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

res = 0
p = [i for i in range(N)]
L = permutations(p)

for p in L:
    tmp = 0
    for i in range(N):
        tmp += max(0,a[p[i]]-b[i])
    res = max(res,tmp)

ans = 0
L = permutations(p)
for p in L:
    tmp = 0
    for i in range(N):
        tmp += max(0,a[p[i]]-b[i])
    ans += (tmp==res)

print(ans)