/* -*- coding: utf-8 -*-
 *
 * 1282.cc:  No.1282 Display Elements - yukicoder
 */

#include<cstdio>
#include<cstdlib>
#include<cstring>
#include<cmath>
#include<iostream>
#include<string>
#include<vector>
#include<map>
#include<set>
#include<stack>
#include<list>
#include<queue>
#include<deque>
#include<algorithm>
#include<numeric>
#include<utility>
#include<complex>
#include<functional>
 
using namespace std;

/* constant */

const int MAX_N = 100000;

/* typedef */

typedef long long ll;

template <typename T, const int MAX_N>
struct BIT {
  int n;
  T bits[MAX_N + 1];
  
  BIT() {}
  BIT(int _n) { init(_n); }

  void init(int _n) {
    n = _n;
    memset(bits, 0, sizeof(bits));
  }

  T sum(int x) {
    T s = 0;
    while (x > 0) {
      s += bits[x];
      x -= (x & -x);
    }
    return s;
  }

  void add(int x, T v) {
    while (x <= n) {
      bits[x] += v;
      x += (x & -x);
    }
  }
};

/* global variables */

int as[MAX_N], bs[MAX_N], ubs[MAX_N];
BIT<int,MAX_N> bit;

/* subroutines */

/* main */

int main() {
  int n;
  scanf("%d", &n);

  for (int i = 0; i < n; i++) scanf("%d", as + i);
  sort(as, as + n);

  for (int i = 0; i < n; i++) scanf("%d", bs + i), ubs[i] = bs[i];
  sort(ubs, ubs + n);
  int m = unique(ubs, ubs + n) - ubs;

  bit.init(m);

  ll sum = 0;
  for (int i = 0; i < n; i++) {
    int bi = lower_bound(ubs, ubs + m, bs[i]) - ubs;
    bit.add(bi + 1, 1);

    int k = lower_bound(ubs, ubs + m, as[i]) - ubs;
    sum += bit.sum(k);
  }

  printf("%lld\n", sum);
  return 0;
}