#pragma GCC optimize("O3")
#include <bits/stdc++.h>
#define ll long long
#define rep(i,n) for(ll i=0;i<(n);i++)
#define pll pair<ll,ll>
#define pii pair<int,int>
#define pq priority_queue
#define pb push_back
#define eb emplace_back
#define fi first
#define se second
#define endl '\n'
#define ios ios_base::sync_with_stdio(0),cin.tie(0),cout.tie(0);
#define lb(c,x) distance(c.begin(),lower_bound(all(c),x))
#define ub(c,x) distance(c.begin(),upper_bound(all(c),x))

using namespace std;

inline int topbit(unsigned long long x){
	return x?63-__builtin_clzll(x):-1;
}

inline int popcount(unsigned long long x){
	return __builtin_popcountll(x);
}

inline int parity(unsigned long long x){//popcount%2
	return __builtin_parity(x);
}



template<class T> inline bool chmax(T& a,T b){if(a<b){a=b;return 1;}return 0;}
template<class T> inline bool chmin(T& a,T b){if(a>b){a=b;return 1;}return 0;}

const ll INF=1e18;

template<typename T>

struct BIT {
  int n;
  vector<T> d;

  BIT(int n=0):n(n),d(n+1) {}

  void add(int i, T x=1) {
    for (i++; i <= n; i += i&-i) {
      //「i += i&-i」は区間を表すindexに最下位ビットを足したもの
      //「-i = ~i-1」が成り立つ
      d[i] += x;
    }
    //更新
  }

  T sum(int i) {
    T x = 0;
    for (i++; i; i -= i&-i) {
      x += d[i];
    }
    //iが0になったら終わり
    //取得
    return x;
  }

};


int main(){
    ll n;
    cin >> n;
    vector<ll> a(n),b(n);
    set<ll> s;
    rep(i,n){
        cin >> a[i];
        s.insert(a[i]);
    }
    rep(i,n){
        cin >> b[i];
        s.insert(b[i]);
    }
    ll m=s.size();
    ll num=0;
    map<ll,ll> h;
    for(auto x:s){
        h[x]=num;
        num++;
    }
    BIT<ll> bit(m+1);
    ll ans=0;
    rep(i,n){
        a[i]=h[a[i]];
        b[i]=h[b[i]];
    }
    sort(a.begin(),a.end());
    rep(i,n){
        bit.add(b[i],1LL);
        ans+=bit.sum(a[i]-1);
    }
    cout << ans << endl;
    return 0;
}