#include <iostream>
#include <map>
using namespace std;

int main() {
	map<int, bool> mp;
	int n;
	cin >> n;
	for (int i = 0; i < n; i++) {
		int temp;
		cin >> temp;
		auto itr = mp.find(temp);
		if (itr == mp.end()) {
			mp[temp] = true;
		} else {
			mp[temp] = false;
		}
	}
	int ans = 0;
	for (auto itr = mp.begin(); itr != mp.end(); itr++) {
		if (itr -> second) {
			ans++;
		}
	}
	cout << ans << endl;
	return 0;
}