#include <bits/stdc++.h>

using namespace std;

#define REP(i,n) for(int i=0; i<(int)(n); i++)

int main() {
  ios_base::sync_with_stdio(0);
  cin.tie(0);

  int n, m;
  cin >> n >> m;

  vector<int> v(n);
  REP (i, n) v[i] = i;
  vector<vector<int> > scores(n, vector<int>(n));
  
  REP (i, m) {
    int x, y, z;
    cin >> x >> y >> z;
    scores[x][y] = z;
  }

  int ret = 0;
  do {
    int tmp = 0;
    REP (i, n) REP (j, i) tmp += scores[v[j]][v[i]];
    ret = max(ret, tmp);
  } while (next_permutation(v.begin(), v.end()));

  cout << ret << endl;
  
  return 0;
}