import sys
readline=sys.stdin.readline
write=sys.stdout.write
from math import gcd as GCD
import math
import itertools

N=int(readline())
A=list(map(int,readline().split()))
B=list(map(int,readline().split()))
m,ans=-1,0
for tpl in itertools.permutations([i for i in range(N)]):
    s=0
    for i in range(N):
        a=A[tpl[i]]
        b=B[i]
        s+=max(0,a-b)
    if s==m:
        ans+=1
    elif s>m:
        m=s
        ans=1
print(ans)