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){
    Scanner sc = new Scanner(System.in);
    int n = sc.nextInt();
    int a[] = new int[n];
    for(int i = 0 ; i < n ; ++i){
      a[i] = sc.nextInt();
    }
    
    Arrays.sort(a);
    
    int ans = 0;

    for(int i = 0 ; i < n ; ++i){
      int count = 1;
      for(int j = i+1 ; j < n ; ++j){
        if(a[i]==a[j]){
          count++;
        }else{
          
          break;
        }
      }
      i+=count-1;
      if(count%2==1){
        ans++;
      }
    }
    System.out.println(ans);    
  }
}