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

namespace YukiCoder
{
    class Program
    {
        static IEnumerable<string> Permu(string str)
        {
            if (str.Length == 1) yield return str;
            char[] pa = str.ToCharArray();
            for (int i = 0; i < pa.Length; i++)
            {
                char c = pa[i]; pa[i] = pa[0]; pa[0] = c;
                foreach (var s in Permu(new string(pa, 1, pa.Length - 1)))
                {
                    yield return c + s;
                }
            }
        }
        static void Main(string[] args)
        {
            var va = Console.ReadLine().Split().Select(int.Parse).ToArray();
            int[][] pia = new int[va[1]][];
            for (int i = 0; i < va[1]; i++)
            {
                pia[i] = Console.ReadLine().Split().Select(int.Parse).ToArray();
            }
            var vb = Enumerable.Range(0, va[0]).Select(n => (char)(n + '0')).ToArray();
            int sMax = 0;
            Permu(new string(vb)).ToList().ForEach(s =>
            {
                int sum = 0;
                for(int i=0; i<pia.Count(); i++)
                {
                    int na = s.IndexOf((char)(pia[i][0] + '0'));
                    int nb = s.IndexOf((char)(pia[i][1] + '0'));
                    if (na < nb) sum += pia[i][2];
                }
                if (sum > sMax) sMax = sum;
            });
            Console.WriteLine(sMax);
        }
    }
}