using System;
using System.Linq;
public class Program {
  public static void Main() {
    int capacity = int.Parse(Console.ReadLine());
    int count = int.Parse(Console.ReadLine());
    int[] array = Console.ReadLine().Split(' ').Select(int.Parse).OrderBy(i => i).ToArray();
    int result = 0;
    int temp = 0;
    foreach (int i in array) {
      if (temp + i <= capacity) {
        temp += i;
        result++;
      } else {
        break;
      }
    }
    Console.WriteLine(result);
  }
}