import itertools as it
input()
A=list(map(int,input().split()))
B=list(map(int,input().split()))
x=c=0
for P in it.permutations(A):
	s=sum([max(a-b,0) for a,b in zip(P,B)])
	if s>x:x=s;c=1
	elif s==x:c+=1
print(c)