from collections import defaultdict
import sys
sys.setrecursionlimit(10**6)
n=int(input())
a=list(map(int,input().split()))
b=list(map(int,input().split()))
ans=[0]
dic=defaultdict(int)

def  cal(x,total,ff):
    if x == n:
        ans[0] = max(ans[0],total)
        dic[total] += 1
        return
    
    for i in range(n):    
        if str(i) in ff:
            continue
        t = max(a[x]-b[i],0)
        
        cal(x+1,total+t,ff+str(i))


f=''
cal(0,0,f)
#print(ans[0])
print(dic[ans[0]])