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


public class Main_yukicoder5 {

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);

        int l = sc.nextInt();
        int n = sc.nextInt();
        int[] w = new int[n];
        for (int i = 0; i < n; i++) {
        	w[i] = sc.nextInt();
        }
        
        Arrays.sort(w);
        int ret = 0;
        for (int i = 0; i < n && l >= w[i]; i++) {
        	l -= w[i];
        	ret++;
        }

        System.out.println(ret);
        
        sc.close();
    }
}