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

public class A000005 {

	public static void main(String[] args) {
		Scanner s = new Scanner(System.in);
		int l = s.nextInt();
		int n = s.nextInt();
		int[] ws = new int[n];
		for(int i=0;i<n;i++) {
			ws[i] = s.nextInt();
		}
		s.close();
		Arrays.sort(ws);
		int r=0;
		for(int w:ws) {
			l-=w;
			if(l<0)break;
			r++;
		}
		System.out.println(r);
	}

}