import java.util.Arrays;
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();

    	int[] w=new int[N];

    	for(int i=0;i<N;i++) {

    		w[i]=sc.nextInt();

    	}

    	Arrays.sort(w);

    	int index=0;

    	while(true) {

    		L-=w[index];

    		if(L<=0) {
    			break;
    		}else {
    			index++;
    		}
    	}

    	System.out.println(index);

    	sc.close();

    }




}