from itertools import permutations
from collections import Counter

N, *AB = map(int, open(0).read().split())
A, B = AB[:N], AB[N:]

C = Counter(
    sum(max(0, p - b) for p, b in zip(P, B))
    for P in permutations(A)
)

ma = max(C.keys())
print(C[ma])