from itertools import permutations

N = int(input())
A = list(map(int, input().split()))
B = list(map(int, input().split()))

L = []
for b in permutations(B):
    TOTAL = 0
    for i, j in zip(A, b):
        TOTAL += max(i-j, 0)
    L += [TOTAL]
MAX = max(L)

ANS = 0
for b in permutations(B):
    TOTAL = 0
    for i, j in zip(A, b):
        TOTAL += max(i-j, 0)
    if TOTAL == MAX:
        ANS += 1
print(ANS)