import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.Arrays;
import java.util.HashSet;
import java.util.Set;

import static java.lang.System.in;

public class Main {
    public static void main(String[] args) throws IOException {
        BufferedReader reader = new BufferedReader(new InputStreamReader(in));
        int N = Integer.parseInt(reader.readLine());
        String[] inputs = reader.readLine().split(" ");
        Set<Long> newElements = new HashSet<>();
        Set<Long> duplicateElements= new HashSet<>();


        for (int i = 0; i < N; i++) {
            long a = Long.parseLong(inputs[i]);
            if(duplicateElements.contains(a)) {

            } else if (newElements.contains(a)) {
                newElements.remove(a);
                duplicateElements.add(a);
            } else {
                newElements.add(a);
            }
        }
        System.out.println(newElements.size());
    }
}