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

public class Main5{
	public static void main(String[] args) {
		Scanner scan = new Scanner(System.in);
		int L = scan.nextInt(), N = scan.nextInt(), W[] = new int[10001];
		for(int i = 0; i < N; i++)	W[i] = scan.nextInt();

		Arrays.sort(W, 0, N);
		int i = 0;
		do{
			L -= W[i];
			i++;
		}while(L - W[i] >= 0 && W[i] != 0);

		System.out.println(i);
	}
}