#include <iostream>
using namespace std;


int main() {
	int a;
	cin >> a;
	int *tab = new int[a];
	int b;
	cin >> b;
	int *tab1 = new int[b];

	for (int i = 0; i < b; i++) {
		cin >> tab1[i];
	}

	for (int i = 0; i < a; i++) {
		for (int j = 1; j < b; j++) {
			if (tab1[j-1] == i)
				tab[i]++;

		}
	}
		int k = 0;

		for (int i = 0; i < a; i++) {
			if (tab[i] % 2 != 0)
				k++;

		}
		cout << k;
		system("pause");

}