using System;
using System.IO;
using System.Linq;
using System.Text;
using System.Diagnostics;
using System.Collections.Generic;
using System.Text.RegularExpressions;
using Enu = System.Linq.Enumerable;

class Program
{
    void Solve()
    {
        int N = reader.Int(), M = reader.Int();
        var table = reader.IntGrid(M);
        var index = Enu.Range(0, N).ToArray();
        int ans = 0;

        do
        {
            int[] at = new int[N];
            for (int i = 0; i < N; i++) at[index[i]] = i;
            int pt = 0;
            foreach (var r in table)
                if (at[r[0]] < at[r[1]]) pt += r[2];
            ans = Math.Max(ans, pt);

        } while (NextPermutation(index));

        Console.WriteLine(ans);
    }

    static bool NextPermutation<T>(T[] a)
    {
        Comparer<T> comp = Comparer<T>.Default;
        for (int i = a.Length - 2; i >= 0; i--)
        {
            if (comp.Compare(a[i], a[i + 1]) < 0)
            {
                int j = a.Length - 1;
                while (comp.Compare(a[i], a[j]) >= 0) { j--; }
                T tmp = a[i]; a[i] = a[j]; a[j] = tmp;
                Array.Reverse(a, i + 1, a.Length - 1 - i);
                return true;
            }
        }
        return false;
    }




    Reader reader = new Reader(Console.In);
    static void Main() { new Program().Solve(); }
}

class Reader
{
    private readonly TextReader reader;
    private readonly char[] separator = { ' ' };
    private readonly StringSplitOptions removeOp = StringSplitOptions.RemoveEmptyEntries;
    private string[] A = new string[0];
    private int i;

    public Reader(TextReader r) { reader = r; }
    public Reader(string file) { reader = new StreamReader(file); }
    public bool HasNext() { return Enqueue(); }
    public string String() { return Dequeue(); }
    public int Int() { return int.Parse(Dequeue()); }
    public long Long() { return long.Parse(Dequeue()); }
    public double Double() { return double.Parse(Dequeue()); }
    public int[] IntLine() { var s = Line(); return s == "" ? new int[0] : Array.ConvertAll(Split(s), int.Parse); }
    public int[] IntArray(int N) { return Enu.Range(0, N).Select(i => Int()).ToArray(); }
    public int[][] IntGrid(int H) { return Enu.Range(0, H).Select(i => IntLine()).ToArray(); }
    public string[] StringArray(int N) { return Enu.Range(0, N).Select(i => Line()).ToArray(); }
    public string Line() { return reader.ReadLine().Trim(); }
    private string[] Split(string s) { return s.Split(separator, removeOp); }
    private bool Enqueue()
    {
        if (i < A.Length) return true;
        string line = reader.ReadLine();
        if (line == null) return false;
        if (line == "") return Enqueue();
        A = Split(line);
        i = 0;
        return true;
    }
    private string Dequeue() { Enqueue(); return A[i++]; }
}