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

M = 0
import itertools
for p in itertools.permutations(A, n):
    temp = 0
    for a, b in zip(p, B):
        temp += max(0, a-b)
    M = max(temp, M)

ans = 0
for p in itertools.permutations(A, n):
    temp = 0
    for a, b in zip(p, B):
        temp += max(0, a-b)
    if temp == M:
        ans += 1
print(ans)