#include "bits/stdc++.h"
using namespace std;

int main() {
    int n, ans =0;
    unordered_map<int, int> m;
    cin>>n;
    for (int i = 0; i < n; ++i) {
        int a;
        cin >> a;
        if (m.find(a) != m.end()) {
            ans -= m[a];
            m[a] = 0;
        } else {
            ans++;
            m[a] = 1;
        }
    }
    cout<<ans<<endl;

    return 0;
}