#include <algorithm>
#include <cmath>
#include <functional>
#include <iomanip>
#include <iostream>
#include <map>
#include <numeric>
#include <queue>
#include <set>
#include <tuple>
#include <vector>
using namespace std;
using ll = long long;
#define rep(i, j, n) for (int i = j; i < (n); ++i)
#define rrep(i, j, n) for (int i = (n)-1; j <= i; --i)

int main() {
  int n;
  cin >> n;
  vector<int> a(n), b(n), c(n);
  rep(i, 0, n) cin >> a[i];
  rep(i, 0, n) cin >> b[i];
  iota(c.begin(), c.end(), 0);

  int mx = 0;
  int ans = 0;
  do {
    int tmp = 0;
    rep(i, 0, n) tmp += max(0, a[c[i]] - b[i]);
    if (tmp == mx)
      ++ans;
    else if (tmp > mx) {
      mx = tmp;
      ans = 1;
    }
  } while (next_permutation(c.begin(), c.end()));
  cout << ans << endl;
  return 0;
}