#include <bits/stdc++.h>
using namespace std;
template <typename T>
struct binary_indexed_tree{
	int N;
	vector<T> BIT;
	binary_indexed_tree(int n){
		N = 1;
		while (N < n){
			N *= 2;
		}
		BIT = vector<T>(N + 1, 0);
	}
	void add(int i, T x){
		i++;
		while (i <= N){
			BIT[i] += x;
			i += i & -i;
		}
	}
	T sum(int i){
		T ans = 0;
		while (i > 0){
			ans += BIT[i];
			i -= i & -i;
		}
		return ans;
	}
};
int main(){
  int N;
  cin >> N;
  vector<int> a(N);
  for (int i = 0; i < N; i++){
    cin >> a[i];
  }
  sort(a.begin(), a.end());
  vector<int> b(N);
  for (int i = 0; i < N; i++){
    cin >> b[i];
  }
  vector<int> x;
  for (int i = 0; i < N; i++){
    x.push_back(a[i]);
    x.push_back(b[i]);
  }
  sort(x.begin(), x.end());
  x.erase(unique(x.begin(), x.end()), x.end());
  int cnt = x.size();
  map<int, int> mp;
  for (int i = 0; i < cnt; i++){
    mp[x[i]] = i;
  }
  for (int i = 0; i < N; i++){
    a[i] = mp[a[i]];
    b[i] = mp[b[i]];
  }
  long long ans = 0;
  binary_indexed_tree<int> BIT(cnt);
  for (int i = 0; i < N; i++){
    BIT.add(b[i], 1);
    ans += BIT.sum(a[i]);
  }
  cout << ans << endl;
}