#include <bits/stdc++.h>
#include <atcoder/all>
using namespace std;
using namespace atcoder;
typedef long long ll;
typedef pair<ll,ll> P;
typedef modint1000000007 mint;
#define rep(i,a,b) for(ll i=a;i<b;i++)
#define rrep(i,a,b) for(ll i=a;i>=b;i--)
const ll inf=1e18;
ll n;
ll a[100005],b[100005];
vector<ll> v;
ll ans;
int main(void){
    cin.tie(0);
    ios::sync_with_stdio(0);
    cin>>n;
    rep(i,0,n){
        cin>>a[i];
    }
    rep(i,0,n){
        cin>>b[i];
    }
    sort(a,a+n);
    rep(i,0,n){
        ans+=(n-i-((upper_bound(a+i,a+n,b[i])-a)-i));
    }
    cout<<ans<<endl;

}