using System;
using static System.Console;
using System.Linq;
using System.Collections.Generic;

class Program
{
    static int NN => int.Parse(ReadLine());
    static int[] NList => ReadLine().Split().Select(int.Parse).ToArray();
    public static void Main()
    {
        Solve();
    }
    static void Solve()
    {
        var t = NN;
        var n = NN;
        var a = new int[n];
        for (var i = 0; i < n; ++i) a[i] = NN;
        var bitmax = 1 << n;
        var INF = int.MaxValue / 2;
        var dp = Enumerable.Repeat(INF, bitmax).ToArray();
        for (var i = 0; i < n; ++i) dp[1 << i] = a[i];
        for (var b = 0; b < bitmax; ++b)
        {
            if (dp[b] == INF) continue;
            for (var i = 0; i < n; ++i)
            {
                var next = b | (1 << i);
                if (b == next) continue;
                var ntime = dp[b] + a[i];
                if ((dp[b] - 1) / t != (ntime - 1) / t) ntime = (dp[b] + t - 1) / t * t + a[i];
                dp[next] = Math.Min(dp[next], ntime);
            }
        }
        WriteLine((dp[^1] + t - 1) / t);
    }
}