import java.io.PrintWriter;
import java.util.Arrays;
import java.util.Scanner;

public class Main {
	static int mod=1000003;
	public static void main(String[] args) throws Exception {
		PrintWriter pw=new PrintWriter(System.out);
		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 sum=0;
		int cnt=0;
		for(int i=0;i<n;i++){
			//pw.println(w[i]);
			if(l>=sum+w[i]){
				sum+=w[i];
				cnt++;
			}else if(l<sum+w[i]){
				break;
			}else{
				return;
			}
		}
		pw.println(cnt);
		pw.close();
		sc.close();
	} 
}