package yukicoder1_0;

import java.util.ArrayList;
import java.util.Collections;
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();

		ArrayList<Integer> w = new ArrayList<Integer>();
		for(int i = 0; i < N; i++) {
			w.add(sc.nextInt());
		}

		Collections.sort(w);

		int sum = 0;
		int count =0;
		for(int i : w) {
			if(sum+i<= L)  {
				sum +=i;
				count++;
			}else {
				break;
			}
		}

		System.out.println(count);

	}
}