package no005;

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];
		for(int i=0;i<n;i++) {
			w[i] = sc.nextInt();
		}
		Arrays.sort(w);
		int ans = 0;
		int sum = 0;
		if (w[0] > l) {
			System.out.println(0);
			return;
		}
		for(int i=0;i<n;i++) {
			sum += w[i];
			if (sum > l) {
				System.out.println(i);
				return;
			}
		}
	}

}