#include <algorithm>
#include <vector>
#include <cfloat>
#include <string>
#include <cmath>
#include <set>
#include <cstdlib>
#include <map>
#include <ctime>
#include <iomanip>
#include <functional>
#include <deque>
#include <iostream>
#include <cstring>
#include <queue>
#include <cstdio>
#include <stack>
#include <climits>
#include <sys/time.h>
#include <cctype>

using namespace std;

typedef long long ll;


int main() {
  int n;
  cin >> n;
  int ans = 0;
  map <int, int> memo;
  for (int i = 0; i < n; i++) {
    int a;
    cin >> a;
    memo[a]++;
    if (memo[a] == 1) {
      ans++;
    }else if (memo[a] == 2){
      ans--;
    }
  }

  std::cout << ans << std::endl;
}