import java.util.*;

public class Main {
	static Scanner sc = new Scanner(System.in);
	public static void main(String[] args) {
		int L = sc.nextInt();
		int n = sc.nextInt();
		int[] ints = new int[n];
		for (int i=0; i<n; i++) {
			ints[i] = sc.nextInt();
		}
		Arrays.sort(ints);
		int count = 0;
		for (int i=0; i<n; i++) {
			if (L-ints[i] > 0) {count++; L-=ints[i];}
			else {break;}
		}
		System.out.println(count);
	}
}