from collections import defaultdict
from itertools import permutations

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

score = defaultdict(int)

for a in permutations(A):
    n = sum([i-j for i,j in zip(a, B) if i > j])
    score[n] += 1

ans = sorted(score.items(), reverse=1)

print(ans[0][1])