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

class Program
{
    static void Main(string[] args)
    {
        int n = int.Parse(Console.ReadLine());
        string[] s = Console.ReadLine().Split();
        List<string> lst = new List<string>();
        HashSet<string> hs = new HashSet<string>();

        for (int i = 0; i < n; i++)
        {
            if (hs.Add(s[i]))
            {
                lst.Add(s[i]);
            }
            else
            {
                lst.Remove(s[i]);
            }
        }

        Console.WriteLine(lst.Count);
        Console.ReadLine();
    }
}