import java.util.*;

public class Main {
    public static Scanner sc = new Scanner(System.in);
    public static void main(String[] args) throws Exception {
        int l = sc.nextInt();
        int n = sc.nextInt();
        List<Integer> list = new ArrayList<>();
        for (int i = 0; i < n; i++) {
            list.add(sc.nextInt());
        }
        
        Collections.sort(list);
        
        int sum = 0;
        int ret = 0;
        for (Integer i : list) {
            sum += i;
            if (sum > l) {
                break;
            }
            ret ++;
        }
        
        System.out.println(ret);
    }
}