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

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;
		X = ++m[ A ];
		if( X == 1 )
			iCnt++;
		else if( X == 2 )
			iCnt--;
	}

	cout << iCnt << endl;

	return 0;
}