import java.util.Scanner;
import java.util.Arrays;

public class Main {
    public static void main(String[] args) {
        Scanner sc=new Scanner(System.in);
        int L=Integer.parseInt(sc.next());
        int N = Integer.parseInt(sc.next());
        int[] block=new int[N];
        for (int i = 0; i < N; i++) {
            block[i] = Integer.parseInt(sc.next());
        }
        Arrays.sort(block);

        int count=0;
        for (int i = 0; i < N; i++) {
            L-=block[count];
            
            if (L>=0){
                count++;
            }else{
                break;
            }
        }
        System.out.println(count);

    }
}