from itertools import permutations
ans = 0
n = int(input())
a = list(map(int, input().split()))
b = list(map(int, input().split()))


maxvalue = 0
for v in permutations(a):
    submax = 0
    for i in range(n):
        submax += max(0, v[i] - b[i])
    maxvalue = max(maxvalue, submax)

for v in permutations(a):
    submax = 0
    for i in range(n):
        submax += max(0, v[i] - b[i])
    ans += int(submax == maxvalue)

print(ans)