#include "bits/stdc++.h"
using namespace std;
//#include "atcoder/all"
//using namespace atcoder;
#define int long long
#define REP(i, n) for (int i = 0; i < (int)n; ++i)
#define RREP(i, n) for (int i = (int)n - 1; i >= 0; --i)
#define FOR(i, s, n) for (int i = s; i < (int)n; ++i)
#define RFOR(i, s, n) for (int i = (int)n - 1; i >= s; --i)
#define ALL(a) a.begin(), a.end()
#define IN(a, x, b) (a <= x && x < b)
template<class T>istream&operator >>(istream&is,vector<T>&vec){for(T&x:vec)is>>x;return is;}
template<class T>inline void out(T t){cout << t << "\n";}
template<class T,class... Ts>inline void out(T t,Ts... ts){cout << t << " ";out(ts...);}
template<class T>inline bool CHMIN(T&a,T b){if(a > b){a = b;return true;}return false;}
template<class T>inline bool CHMAX(T&a,T b){if(a < b){a = b;return true;}return false;}
constexpr int INF = 1e18;

// a^b
long long modpow(long long a, long long n, long long mod) {
	long long res = 1;
	while (n > 0) {
		if (n & 1) res = res * a % mod;
		a = a * a % mod;
		n >>= 1;
	}
	return res;
}

// a^-1
long long modinv(long long a, long long m) {
	long long b = m, u = 1, v = 0;
	while (b) {
		long long t = a / b;
		a -= t * b; swap(a, b);
		u -= t * v; swap(u, v);
	}
	u %= m;
	if (u < 0) u += m;
	return u;
}

// a^x ≡ b (mod. m) となる最小の正の整数 x を求める
long long modlog(long long a, long long b, int m) {
	a %= m, b %= m;

	// calc sqrt{M}
	long long lo = -1, hi = m;
	while (hi - lo > 1) {
		long long mid = (lo + hi) / 2;
		if (mid * mid >= m) hi = mid;
		else lo = mid;
	}
	long long sqrtM = hi;

	// {a^0, a^1, a^2, ..., a^sqrt(m)} 
	map<long long, long long> apow;
	long long amari = 1;
	for (long long r = 0; r < sqrtM; ++r) {
		if (!apow.count(amari)) apow[amari] = r;
		(amari *= a) %= m;
	}

	// check each A^p
	long long A = modpow(modinv(a, m), sqrtM, m);
	amari = b;
	for (long long q = 0; q < sqrtM; ++q) {
		if (apow.count(amari)) {
			long long res = q * sqrtM + apow[amari];
			if (res > 0) return res;
		}
		(amari *= A) %= m;
	}

	// no solutions
	return -1;
}

template< typename T >
struct Compress {
  vector< T > xs;

  Compress() = default;

  Compress(const vector< T > &vs) {
	add(vs);
  }

  Compress(const initializer_list< vector< T > > &vs) {
	for(auto &p : vs) add(p);
  }

  void add(const vector< T > &vs) {
	copy(begin(vs), end(vs), back_inserter(xs));
  }

  void add(const T &x) {
	xs.emplace_back(x);
  }

  void build() {
	sort(begin(xs), end(xs));
	xs.erase(unique(begin(xs), end(xs)), end(xs));
  }

  vector< int > get(const vector< T > &vs) const {
	vector< int > ret;
	transform(begin(vs), end(vs), back_inserter(ret), [&](const T &x) {
	  return lower_bound(begin(xs), end(xs), x) - begin(xs);
	});
	return ret;
  }

  int get(const T &x) const {
	return lower_bound(begin(xs), end(xs), x) - begin(xs);
  }

  const T &operator[](int k) const {
	return xs[k];
  }
};

template <typename T>
struct SegmentTree{
  using F = function<T(T,T)>;
  int n;
  F f;
  T ti;
  vector<T> dat;

  SegmentTree(){}
  SegmentTree(F f,T ti):f(f),ti(ti){}

  void init(int n_){
	n=1;
	while(n<n_) n<<=1;
	dat.assign(n<<1,ti);
  }

  void build(const vector<T> &v){
	int n_=v.size();
	init(n_);
	for(int i=0;i<n_;i++) dat[n+i]=v[i];
	for(int i=n-1;i;i--)
	  dat[i]=f(dat[(i<<1)|0],dat[(i<<1)|1]);
  }

  void set_val(int k,T x){
	dat[k+=n]=x;
	while(k>>=1)
	  dat[k]=f(dat[(k<<1)|0],dat[(k<<1)|1]);
  }

  T query(int a,int b){
	if(a>=b) return ti;
	T vl=ti,vr=ti;
	for(int l=a+n,r=b+n;l<r;l>>=1,r>>=1) {
	  if(l&1) vl=f(vl,dat[l++]);
	  if(r&1) vr=f(dat[--r],vr);
	}
	return f(vl,vr);
  }

  template<typename C>
  int find(int st,C &check,T &acc,int k,int l,int r){
	if(l+1==r){
	  acc=f(acc,dat[k]);
	  return check(acc)?k-n:-1;
	}
	int m=(l+r)>>1;
	if(m<=st) return find(st,check,acc,(k<<1)|1,m,r);
	if(st<=l&&!check(f(acc,dat[k]))){
	  acc=f(acc,dat[k]);
	  return -1;
	}
	int vl=find(st,check,acc,(k<<1)|0,l,m);
	if(~vl) return vl;
	return find(st,check,acc,(k<<1)|1,m,r);
  }

  template<typename C>
  int find(int st,C &check){
	T acc=ti;
	return find(st,check,acc,1,0,n);
  }
  //アウトの条件を渡す
};

signed main(){
	int N;
	cin >> N;
	vector<int> a(N), b(N);
	cin >> a >> b;
	sort(ALL(a));
	Compress c(a);
	c.add(b);
	c.build();
	SegmentTree<int> seg([](int a, int b) {return a + b;}, 0ll);
	seg.build(vector<int>(c.xs.size()));
	int ans = 0;
	REP(i, b.size()) {
		int idx = c.get(b[i]);
		seg.set_val(idx, seg.query(idx, idx + 1) + 1);
		ans += seg.query(0, c.get(a[i]));
	}
	out(ans);
}