#include <iostream>
#include <vector>
#include <algorithm>

using namespace std;

int main() {
  int n;
  cin >> n;
  vector<long long> v(n);

  for (int i=0; i<n; i++) {
    int t;
    cin >> t;
    v[t-1]++;
  }

  cout << count(v.begin(), v.end(), 1) << endl;
  return 0;
}