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

maxi = 0
ans  = 0

for x in itertools.permutations(A,N):

    now = 0
    cnt = 0
    for i in x:
        if i > B[cnt]:
            now += i-B[cnt]
        cnt += 1

    if now == maxi:
        ans += 1
    elif now > maxi:
        maxi = now
        ans  = 1

print (ans)