import itertools

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


lis = list(itertools.permutations(a, n))

dic = {}
for x in lis:
    p = 0
    for i,y in enumerate(x):
        if y > b[i]:
            p += y - b[i]
    if p in dic:
        dic[p] += 1
    else:
        dic[p] = 1
dic2 = sorted(dic.items(), reverse=True)
print(dic2[0][1])