import itertools

N = int(input())
A = list(map(int, input().split()))
B = list(map(int, input().split()))
max_sco = 0
cnt = 0
for ID in itertools.permutations(range(N)):
    sco = 0
    for i in range(N):
        if A[ID[i]] > B[i]:
            sco += A[ID[i]] - B[i]
    if max_sco < sco:
        max_sco = sco
        cnt = 1
    elif max_sco == sco:
        cnt += 1
print(cnt)