import itertools
N=int(input())
pa=list(map(int,input().split()))
pb=list(map(int,input().split()))
xv=xn=0
for p in itertools.permutations(pa):
    mv=mn=0
    for a,b in zip(p,pb):
        if a>b: mv+=a-b
    if mv==xv:  xn+=1
    elif mv>xv: xv,xn=mv,1
print(xn)