You are playing the following game with Joisino.

* Initially, you have a blank sheet of paper.
* Joisino announces a number. If that number is written on the sheet, erase the number from the sheet; if not, write the number on the sheet. This process is repeated N times.
* Then, you are asked a question: How many numbers are written on the sheet now?



The numbers announced by Joisino are given as A_1, ... ,A_N in the order she announces them. How many numbers will be written on the sheet at the end of the game?

Constraints

* 1≤N≤100000
* 1≤A_i≤1000000000(=10^9)
* All input values are integers.

Input

Input is given from Standard Input in the following format:


N
A_1
:
A_N


Output

Print how many numbers will be written on the sheet at the end of the game.

Examples

Input

3
6
2
6


Output

1


Input

4
2
5
5
2


Output

0


Input

6
12
22
16
22
18
12


Output

2
import java.util.*;

public class Main {
	public static void main(String[] args) throws Exception{
		Scanner scn = new Scanner(System.in);
		int n = scn.nextInt();
		int[] a = new int[n];
		for(int i=0; i<n; i++){
			a[i] = scn.nextInt();
		}
      	Arrays.sort(a);
      	int c = a[0];
    	int count = 0;
    	int ans =0;
    	for(int i=0;i<n;i++){
      		if(c==a[i]){
       			count++;
      		}else{
        		c = a[i];
        		if(count%2==1){
          			ans++;
        		}
        		count=1;
      		}
    	}
      	if(count%2==1){
      		ans++;
    	}
     	System.out.println(ans);
	}
}
