import java.util.*;
 
class Main {
    public static void main(String[] args) {
    	
    	Scanner sc = new Scanner(System.in);
    	ArrayList<Integer> W = new ArrayList<>();

    	int L = sc.nextInt();
    	int N = sc.nextInt();
    	for(int i = 0; i < N; i++) {
    		W.add(sc.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);
    }
}