import java.util.*;
import java.io.*;
class no5
{
    public static void main(String args[])throws IOException
    {
	BufferedReader sc=new BufferedReader(new InputStreamReader(System.in));
	int l=Integer.parseInt(sc.readLine());
	int n=Integer.parseInt(sc.readLine());
	String w[]=sc.readLine().split(" ");
	int wi[]=new int[n];
	for(int i=0;i<n;i++)wi[i]=Integer.parseInt(w[i]);
	Arrays.sort(wi);
	int ans=0,s=l,i=0;
	do
	    {
		if(s>=wi[i])
		    {
		    s-=wi[i];
		    ans++;
		    }
		else break;
		//System.out.println(s);
		i++;
	    }while(s>=0&&i<n);
	System.out.println(ans);
    }
}