package yukicoder;

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

public class No5v2 {
	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];
		int tmp = 0;
		int c = 0;
		for (int i = 0; i < w.length; i++) {
			w[i] = sc.nextInt();
		}
		sc.close();
		
		Arrays.sort(w);//ソート
		
		for (int i = 0; i < w.length; i++) {
			if (L - tmp >= w[i]) {
				tmp += w[i];
				c++;
			} else {
				break;
			}
		}
		System.out.println(c);
	}
}