import java.util.*;

class Test {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        ArrayList<Integer> W = new ArrayList<>();

        int L = in.nextInt();
        int N = in.nextInt();
        for(int i = 0; i < N; i++) {
            W.add(in.nextInt());
        }
        Collections.sort(W);
        int i = 0;
        while(L >= 0 && i < N) {
            L = L - W.get(i);
            if(L >= 0) {
                i++;
            } else {
                break;
            }
        }

        System.out.println(i);
    }
}