using System;
using System.Linq;

class Yuki5 {
    private static string In => Console.ReadLine();
    static void Main(string[] _) {
        var count  = 0;
        var length = int.Parse(In);
        Console.ReadLine();
        var width = In.Split().Select(int.Parse).ToList();
        width.Sort();
        foreach (var l in width) {
            if (length >= l) {
                length -= l;
                count++;
            } else break;
        }
        Console.WriteLine(count);
    }
}