using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

class Magatro
{
    static void Main()
    {
        int ans = 0;
        int N = int.Parse(Console.ReadLine());
        string[] q = Console.ReadLine().Split(' ');
        HashSet<string> H = new HashSet<string>();
        List<string> L = new List<string>();
        for(int i = 0; i < N; i++)
        {
            if (H.Add(q[i]))
            {
                L.Add(q[i]);
            }
            else
            {
                L.Remove(q[i]);
            }
        }
        Console.WriteLine(L.Count);
    }
}