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

import itertools
from collections import defaultdict
dic = defaultdict(int)
for perm in itertools.permutations(A):
    val = 0
    for i in range(N):
        val += max(0, perm[i] - B[i])
    dic[val] += 1
    
max_val = max(dic.keys())

print(dic[max_val])