#include<bits/stdc++.h>
using namespace std;
#define int long long
#define REP(i,m,n) for(int i=(m);i<(n);i++)
#define rep(i,n) REP(i,0,n)
#define pb push_back
#define all(a) a.begin(),a.end()
#define rall(c) (c).rbegin(),(c).rend()
#define mp make_pair
#define endl '\n'
#define vec vector<ll>
#define mat vector<vector<ll> >
#define fi first
#define se second
typedef long long ll;
typedef unsigned long long ull;
typedef pair<ll,ll> pll;
typedef long double ld;
typedef complex<double> comp;
const ll INF=1e9+7;
const ll inf=INF*INF;
const ll MOD=1e9+7;
const ll mod=MOD;
const int MAX=1000010;
const double PI=acos(-1.0);

//BIT
template< class T >
struct BIT
{
  vector< T > data;

  BIT(int sz)
  {
    data.assign(++sz, 0);
  }

  T sum(int k)
  {
    T ret = 0;
    for(++k; k > 0; k -= k & -k) ret += data[k];
    return (ret);
  }

  void add(int k, T x)
  {
    for(++k; k < data.size(); k += k & -k) data[k] += x;
  }
};

signed main(){
    ll n;cin>>n;
    set<ll>st;
    vector<ll>a(n);
    vector<ll>b(n);
    rep(i,n)cin>>a[i];
    rep(i,n)cin>>b[i];
    rep(i,n){
        st.insert(a[i]);
        st.insert(b[i]);
    }
    ll cnt=0;
    map<ll,ll>ma;
    for(auto e:st){
        ma[e]=cnt;
        cnt++;
    }
    BIT<ll> bit(cnt);
    ll ans=0;
    sort(all(a));
    rep(i,n){
        bit.add(ma[b[i]],1);
        if(ma[a[i]]==0)continue;
        ans+=bit.sum(ma[a[i]]-1);
    }
    cout<<ans<<endl;
}