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

using namespace std;

int main(){
  int n;
  vector<int> A(100001, 0);
  cin >> n;
  int sum = 0;

  for (int i = 0; i < n; ++i){
    int a;
    cin >> a;
    ++A[a];
  }

  for (int i = 1; i <= n; ++i){
    if (A[i] == 1){
      ++sum;
    }
  }

  cout << sum << endl;

  return 0;
}