import java.util.*;

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