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

//int Yuki0182()
int main()
{
int i;
int X;
int A;
int N;
int iCnt;
map<int, int> m;

	cin >> N;
     	
	iCnt = 0;
	for( i = 0; i < N; i++ )
	{
		cin >> A;
		switch( ++m[ A ] )
		{
		case 1:
			iCnt++;

			break;
		case 2:
			iCnt--;
		}
	}

	cout << iCnt << endl;

	return 0;
}