#include <bits/stdc++.h>

using namespace std;

int main() {
  ios::sync_with_stdio(false);
  cin.tie(nullptr);
  int N, M;
  cin >> N >> M;
  vector<int> A(M), B(M), C(M);
  for (int i = 0; i < M; i++) {
    cin >> A[i] >> B[i] >> C[i];
  }
  vector<int> P(N);
  iota(P.begin(), P.end(), 0);
  int res = 0;
  do {
    int r = 0;
    for (int i = 0; i < M; i++) {
      int a = 0, b = 0;
      for (int j = 0; j < N; j++) {
        if (A[i] == P[j]) a = j;
        if (B[i] == P[j]) b = j;
      }
      if (a < b) r += C[i];
    }
    res = max(res, r);
  } while (next_permutation(P.begin(), P.end()));
  cout << res << '\n';
  return 0;
}