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

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> list = new ArrayList<>();
        
        for (int i = 0; i < n; i++) {
            list.add(sc.nextInt());
        }

        Collections.sort(list);
        
        int sum = 0;
        int w = 0;
        for (int i = 0; i < n; i++) {
            sum += list.get(i);
                if (sum <= l) {
                    w++;
                } else {
                    break;
                }
        }
        System.out.println(w);
    }
}