import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.Scanner;

public class Main {
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		int l = sc.nextInt();
		int n = sc.nextInt();
		List<Integer> w = new ArrayList<Integer>();
		for(int i=0; i<n; i++){
			w.add(sc.nextInt());
		}
		sc.close();
		Collections.sort(w);
		int sum = 0;
		int count;
		for(count = 0; count<w.size(); count++){
			if(l >= sum + w.get(count)){
				sum = sum + w.get(count);
			}else{
				break;
			}
		}
		System.out.println(count);
	}
}