import java.util.Arrays;
import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);

		int l = sc.nextInt();
		int n = sc.nextInt();

		int[] w = new int[n];
		Arrays.setAll(w, i -> sc.nextInt());
		Arrays.sort(w);

		int cnt = 0;
		int sum = 0;
		for (int i = 0; i < n; i++) {
			sum += w[i];
			if (sum <= l) ++cnt;
		}

		System.out.println(cnt);

		sc.close();
	}
}