using System;
using System.Collections.Generic;
using System.Linq;
using System.IO;
using System.Text;

class Program
{
    static void Main()
    {
        var sw = new StreamWriter(Console.OpenStandardOutput()) { AutoFlush = false };
        var sc = new Scan();
        int c = sc.Int;
        int n = sc.Int;
        var w = new int[n];
        var dp = new int[1 << n];
        var pl = new List<int>();
        for (int i = 0; i < n; i++)
            w[i] = sc.Int;
        
        for (int i = 1; i < (1 << n); i++)
        {
            int s = 0;
            for (int j = 0; j < n; j++)
                if ((i >> j & 1) == 1)
                    s += w[j];
            
            if (s <= c)
            {
                pl.Add(i);
                dp[i] = 1;
                continue;
            }
            dp[i] = n;
            foreach (var j in pl)
                if ((i & j) == j)
                    dp[i] = Math.Min(dp[i], dp[i ^ j] + 1);
        }
        sw.WriteLine(dp[(1 << n) - 1]);
        sw.Flush();
    }
}
class Scan
{
    public int Int { get { return int.Parse(Str); } }
    public long Long { get { return long.Parse(Str); } }
    public string Str { get { return Console.ReadLine().Trim(); } }
    public int[] IntArr { get { return StrArr.Select(int.Parse).ToArray(); } }
    public long[] LongArr { get { return StrArr.Select(long.Parse).ToArray(); } }
    public string[] StrArr { get { return Str.Split(); } }
}