import java.util.Arrays;
import java.util.Scanner;

public class No5 {
	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 sum=0;
		for(int i=0;i<n;i++)
			w[i]=sc.nextInt();
		Arrays.sort(w);
		for(int i=0;i<n;i++)
		{
			sum+=w[i];
			if(sum>l)
			{
				System.out.println(i);
				return;
			}
		}
		System.out.println(l);
	}
}