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 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);
  }
}