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

public class Main{
    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];
        int sum = 0;
        for(int i = 0; i < n; i++) w[i] = sc.nextInt();
        Arrays.sort(w);
        for(int i = 0; i < n; i++){
           sum += w[i];
           if(sum > l){
             System.out.println(i);
             return;
           }
        }
    }
}