/*
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	でかいですね。
	更にかわいいときた。
	うん。好き。
*/
/*  include  */
#include <bits/stdc++.h>
using namespace std;
int main()
{
	int N;
	long long A;
	int ans=0;
	map<long long,bool> m; 
	cin>>N;
	for(int i=0;i<N;i++){
		cin>>A;
		m[A]^=true;
		if(m[A])ans++;
		else ans--;
	}
	cout<<ans<<endl;
}

Measured memory_bytes: 6528