def main():
  from sys import stdin
  from itertools import permutations
  readline=stdin.readline
  n = int(readline())
  A = list(map(int, readline().split()))
  B = list(map(int, readline().split()))
  ans = 0
  L = [x for x in range(n)]
  for i in permutations(L):
    tmp = 0
    k = 0
    for j in i:
      tmp += max(A[j]-B[k], 0)
      k += 1
    ans = max(ans, tmp)
  cnt = 0
  for i in permutations(L):
    tmp = 0
    k = 0
    for j in i:
      tmp += max(A[j]-B[k], 0)
      k += 1
    if tmp == ans:
      cnt += 1
  print(cnt)
main()