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.Arrays;
import java.util.Scanner;

class Main{
	public static void main(String[] arh) {
		Scanner sc=new Scanner(System.in);
		int kaisu=sc.nextInt();
		int[] bl=new int[kaisu];


		for(int i=0; i<kaisu; i++) {
			bl[i]=sc.nextInt();
		}
		Arrays.sort(bl);

		int points=0;
		int now_counter=1;
		int now_pointer=bl[0];
		int last_update=0;
		for(int i=1; i<kaisu; i++) {
			if(bl[i]!=now_pointer) {
				points+=now_counter%2;
				now_pointer=bl[i];
				now_counter=1;
				last_update=i;
			}
			else {
				now_counter++;
			}
		}
		points+=now_counter%2;

		System.out.println(points);
	}
}