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

mp = 0
cnt = 0
for l in list(itertools.permutations(A)):
    point=0
    for i in range(N):
        point+=max(0,l[i]-B[i])
    if mp == point:
        cnt+=1
    elif mp<point:
        mp=point
        cnt=1
print(cnt)