using System;
using System.Collections.Generic;
using System.Linq;

namespace No5_1 {
    public class Program {
        public static void Main(string[] args) {
            var l = Read(Convert.ToInt32);
            Read(Convert.ToInt32);
            var wn = ReadList(Convert.ToInt32);
            wn.Sort();

            var sum = 0;
            var cnt = 0;
            foreach(var w in wn){
                if((sum += w) <= l) cnt++;
                 else break;
            }
            Console.WriteLine(cnt);
        }

        public static TOutput Read<TOutput>(Converter<string, TOutput> converter) {
            return converter(Console.ReadLine());
        }

        public static List<TOutput> ReadList<TOutput>(Converter<string, TOutput> converter, char c = ' ') {
            return Console.ReadLine()?.Split(c).ToList().ConvertAll(converter);
        }
    }
}