#include <bits/stdc++.h>
using namespace std;
#include <atcoder/all>
using namespace atcoder;
#define rep(i,n) for (int i=0; i<(n); i++)
using ll = long long;
using P = pair<int, int>;
using vi = vector<int>;
using vvi = vector<vi>;

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