/* -*- coding: utf-8 -*-
 *
 * 2547.cc:  No.2547 Did you enjoy Chofu Festival? - yukicoder
 */

#include<cstdio>
#include<algorithm>
 
using namespace std;

/* constant */

const int MAX_N = 100;

/* typedef */

/* global variables */

int as[MAX_N], bs[MAX_N];

/* subroutines */

/* main */

int main() {
  int n;
  scanf("%d", &n);
  for (int i = 0; i < n; i++) scanf("%d", as + i);
  for (int i = 0; i < n; i++) scanf("%d", bs + i);

  int cnt = 0;
  for (int i = 0; i < n; i++)
    if (as[i] <= bs[i]) cnt++;

  printf("%d\n", cnt);
  
  return 0;
}