N = int(input())
A = list(map(int, input().split()))
B = list(map(int, input().split()))
from collections import defaultdict
scores = defaultdict(lambda: 0)
max_score = 0
from itertools import groupby, accumulate, product, permutations, combinations
for perm in permutations(A, N):
  score = 0
  for i in range(N):
    score += max(0, perm[i]-B[i])
  scores[score] += 1
  max_score = max(max_score, score)
print(scores[max_score])