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

class Program
{
    static void Main(string[] args)
    {
        int total = int.Parse(Console.ReadLine());
        long[] ary = Console.ReadLine().Split().Select(xx => long.Parse(xx)).ToArray();
        List<long> list = new List<long>();
        long m = ary[0];

        foreach (long i in ary)
        {

            if (!list.Contains(i))
            {
                list.Add(i);
            }
            else
            {
                list.Remove(i);
            }

        }

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