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

//#define int long long
const int INF = 1e18;
const int N = 1e3 + 5;
const int mod = 1e9 + 7;


signed main()
{
    int n , k;
    cin >> n;
    map<int , int> cnt;
    while(n--){
        cin >> k;
        cnt[k]++;
    }
    int ans = 0;
    for(auto i : cnt){
        ans += (i.second % 2);
    }
    cout << ans << endl;
}