#include <bits/stdc++.h>
using namespace std;
#ifdef LOCAL
  #include "settings/debug.cpp"
#else
  #define Debug(...) void(0)
#endif
#define rep(i, n) for (int i = 0; i < (n); ++i)
using ll = long long;
using ull = unsigned long long;

int main() {
  int n, m;
  cin >> n >> m;
  vector<tuple<int, int, int>> s(m);
  for (auto&& [a, b, c] : s) cin >> a >> b >> c;
  vector<int> p(n);
  iota(p.begin(), p.end(), 0);
  int ans = 0;
  do {
    int sum = 0;
    for (auto [a, b, c] : s) {
      if (p[a] < p[b]) sum += c;
    }
    ans = max(ans, sum);
  } while (next_permutation(p.begin(), p.end()));
  cout << ans << endl;
  return 0;
}