import java.util.*;
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> wide = new ArrayList<Integer>();
		for( int i = 0 ; i < N ; i++ ){
			wide.add(sc.nextInt());
		}
		Collections.sort(wide);
		int w_sum = 0;
		int count = 0;
		for( int i = 0 ; i < N ; i++ ){
			w_sum += wide.get(i);
			if( w_sum > L)break;
			count++;
		}
		System.out.println(count);
	}
}