#include <bits/stdc++.h>
#define fastIO (cin.tie(0), cout.tie(0), ios::sync_with_stdio(false))
using namespace std;

int main() {
  fastIO;
  int n;
  cin >> n;
  vector<int> A(n + 1, 0);

  int cnt = 0;
  for (int i = 0; i < n; ++i) {
    int num;
    cin >> num;
    if (A[num] == 0) {
      A[num] = 1;
      cnt++;
    } else if (A[num] == 1) {
      A[num] = -1;
      cnt--;
    }
  }

  cout << cnt << '\n';
  return 0;
}