import java.util.*;

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];
    for(int i = 0; i < N; i++) {
      w[i] = sc.nextInt();
    }
    Arrays.sort(w);
    int ans = 0;
    for(int i = 0; i < N; i++) {
      L -= w[i];
      if(L >= 0) {
        ans++;
      } else {
        break;
      }
    }
    System.out.println(ans);
  }
}