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


public class Main {
	public static void main(String[] a) {
		Scanner s=new Scanner(System.in);
		int L=s.nextInt(),N=s.nextInt(),i=0,Z=0;
		int[] B=new int[N];
		while(s.hasNext())B[i++]=s.nextInt();
		Arrays.sort(B);
		for(i=0;L>(Z+=B[i++]););
		System.out.println(i-(Z>L?1:0));
	}
}