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();
        int [] W = new int [N];
        for(int i=0; i<N; i++){
            W[i]=sc.nextInt();
        }
        Arrays.sort(W);
        int i =0;
        int s =0;
        int c =0;
        while(true){
                s=s+W[i];
                if(s>=L){break;}
                i++;
                c++;
               if(c==N){break;}
        }
        System.out.println(c);
    }
}