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

public class Program
{
    static void Main()
    {
        int Width = int.Parse(Console.ReadLine());
        Console.ReadLine();
        var ValueList = (Console.ReadLine()).Split(' ').Select(int.Parse).OrderBy(a => a);
        int Count = 0;
        foreach(var ItemW in ValueList){
            if((Width -= ItemW) >= 0 ){
                Count++;
            }
        }
        Console.WriteLine(Count);
    }
    
    static IEnumerable<char> GetChar(){
        int Moji = 0;
        int Count = 1;
        char tmp = (char)0;
        while((Moji = Console.Read()) != -1){
            if(Moji <65 || Moji >90){
                break;
            }
            tmp = (char)(( Moji - 65 + 26 - Count)%26 + 65);
            yield return tmp;
            Count = (Count + 1)%26;
        }
    }
    
    static void WriteLine <T>(T dsads){
        
    }
}