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];
        int result=0;
        int count=0;
        for(int i=0;i<n;i++){
            w[i]=sc.nextInt();
        }
        Arrays.sort(w);
        for(int i=0;i<n;i++){
            result+=w[i];
            if(result>l){
                break;
            }
            count++;
        }
        System.out.println(count);
    }
}