import java.util.*;

public class Main {
    public static void main(String[] args){
        Scanner sc=new Scanner(System.in);
        int boxWidth=sc.nextInt();
        int n=sc.nextInt();
        
        int[] blocks=new int[n];
        for(int i=0;i<n;i++){
            blocks[i]=sc.nextInt();
        }
        Arrays.sort(blocks);
        ///System.out.println(Arrays.toString(blocks));
        int count=0;
        for(int block:blocks){
            boxWidth-=block;
            if(boxWidth<0){
                break;
            }
            count++;
        }
        System.out.println(count);
    }
}