#include <stdio.h>
#include <bits/stdc++.h>
#include <atcoder/fenwicktree>
using namespace atcoder;
using namespace std;
#define rep(i,n) for (int i = 0; i < (n); ++i)
#define Inf 1000000000

int main(){
	
	int N;
	cin>>N;
	
	vector<long long> a(N),b(N);
	vector<int> t;
	rep(i,N){
		cin>>a[i];
		t.push_back(a[i]);
	}
	rep(i,N){
		cin>>b[i];
		t.push_back(b[i]);
	}
	
	
	sort(t.begin(),t.end());
	t.erase(unique(t.begin(),t.end()),t.end());
	
	rep(i,N){
		a[i] = distance(t.begin(),lower_bound(t.begin(),t.end(),a[i]));
		b[i] = distance(t.begin(),lower_bound(t.begin(),t.end(),b[i]));
	}
	
	sort(a.begin(),a.end());
	
	long long ans = 0LL;
	
	fenwick_tree<long long> F(t.size());
	
	rep(i,N){
		F.add(b[i],1);
		ans += F.sum(0,a[i]);
	}
	
	cout<<ans<<endl;
	
    return 0;
}