// FROM : https://yukicoder.me/submissions/306204
//
#include <bits/stdc++.h>
#include <iostream>
using namespace std;

struct Data
{
  int item1, item2, score;
};

int main()
{
  long long N,M;
  cin >> N >> M;
  vector<Data> scores(M);
  vector<long long> v(N);

  for (int i=0; i < N; i++) {
    v[i] = i;
  }

  for (long long i=0; i<M; i++) {
    int a,b,c;
    struct Data d;
    cin >> d.item1 >> d.item2 >> d.score;
    scores[i] = d;
  }

  long long ans = 0;
  do {
    long long  t = 0;
    for (int i = 0; i<M; i++) {
      if (v[scores[i].item1] < v[scores[i].item2]) 
        t += scores[i].score;
    }
    ans = max(ans, t);
  } while (next_permutation(v.begin(), v.end()));
  cout << ans << endl;



  return 0;
}