using System;
using System.Collections.Generic;
using System.Linq;

class Program
{
    public void Solve()
    {
        int N = int.Parse(Console.ReadLine());
        string[] A = Console.ReadLine().Split(' ');

        List<string> aList = new List<string>();
        aList.AddRange(A);
        aList.Sort();

        HashSet<string> hs = new HashSet<string>();
        string chk = "";

        for (int i = 0; i < N; i++)
        {
            if (chk != aList[i])
            {
                chk = aList[i];
                hs.Add(aList[i]);
            }
            else { hs.Remove(aList[i]); }
        }

        Console.WriteLine(hs.Count());
    }

    static void Main()
    {
        var solver = new Program();
        solver.Solve();
    }
}