/* package whatever; // don't place package name! */

import java.util.*;
import java.lang.*;
import java.io.*;

class Ideone
{
	public static void main (String[] args) throws java.lang.Exception
	{
		// your code goes here
		Scanner sc = new Scanner(System.in);
    	int L = sc.nextInt();
    	int N = sc.nextInt();
    	
    	List<Integer> list = new ArrayList<>();
    	for (int i = 0;i < N;i++) {
    		list.add(sc.nextInt());
    	}
    	list.sort((s1, s2) -> s1.compareTo(s2));
    	int sum =0;
    	int count = 0;
    	for (Integer I:list) {
    		sum += I;
    		if (0 <= L - sum) count++;
    	}
    	System.out.println(count);
	}
}