import sys
from itertools import permutations
from collections import Counter
sys.setrecursionlimit(10**7)
def I(): return int(sys.stdin.readline().rstrip())
def MI(): return map(int,sys.stdin.readline().rstrip().split())
def LI(): return list(map(int,sys.stdin.readline().rstrip().split()))
def LI2(): return list(map(int,sys.stdin.readline().rstrip()))
def S(): return sys.stdin.readline().rstrip()
def LS(): return list(sys.stdin.readline().rstrip().split())
def LS2(): return list(sys.stdin.readline().rstrip())


N = I()
A = LI()
B = LI()

ANS = []
for X in list(permutations([i for i in range(N)],N)):
    a = 0
    for i in range(N):
        a += max(0,A[X[i]]-B[i])
    ANS.append(a)

count = Counter(ANS)
x = list(count.keys())[0]

print(count[x])