#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using P = pair<int, int>;
using T = tuple<int, int, int>;
#define al(a) a.begin(), a.end()
#define ral(a) a.rbegin(), a.rend()
#define sz(a) (int)a.size()
#define rep(i, n) for (int i = 0; i < (n); ++i)
#define rrep(i, n) for (int i = 1; i <= (n); ++i)
#define drep(i, n) for (int i = (n)-1; i >= 0; --i)
#define db(a, b) cout << #a << ": " << a << " " << #b << ": " << b << endl;

int main() {
  int n, m;
  cin >> n >> m;
  vector<T> t(m);
  for (auto &[a, b, c] : t) { cin >> a >> b >> c; }

  vector<int> p(n);
  iota(al(p), 0);
  int ans = 0;
  do {
    int now = 0;
    for (auto [a, b, c] : t) {
      int na = 0, nb = 0;
      rep(i, n) {
        if (p[i] == a) na = i;
        if (p[i] == b) nb = i;
      }
      if (na < nb) now += c;
    }
    ans = max(ans, now);
  } while (next_permutation(al(p)));
  
  cout << ans << endl;
  return 0;
}