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

import itertools
_max = 0
count = 0
for v in itertools.permutations(range(N)):
    Sum = 0
    for k in range(N):
        if a[v[k]] > b[k]:
            Sum += a[v[k]] - b[k]
    if Sum == _max:
        count += 1
    elif Sum > _max:
        _max = Sum
        count = 1
print(count)