import itertools
import collections

n=int(input())
a=list(map(int,input().split()))
b=list(map(int,input().split()))
cnt=collections.defaultdict(int)
for p in itertools.permutations(range(n)):
    point=0
    for i in range(n):
        if a[p[i]]>b[i]:
            point+=a[p[i]]-b[i]
    cnt[point]+=1
points=list(cnt.keys())
maxpoint=max(points)
print(cnt[maxpoint])