#include <bits/stdc++.h>
#include <fstream>

using namespace std;

int main() {
  ios::sync_with_stdio(false);
  cin.tie(0);
  cout.tie(0);

  ifstream cin{"hamilton.in"};
  ofstream cout{"hamilton.out"};

  int N, M;
  cin >> N >> M;

  vector<vector<pair<int, int>>> adj(N + 1);

  for (int i = 0; i < M; i++) {
    int u, v, w;
    cin >> u >> v >> w;

    adj[u].push_back({v, w});
  }

  vector<vector<vector<int>>> dp((1 << N) + 1,
                                 vector<vector<int>>(N, vector<int>(N, 1e9)));

  for (int i = 0; i < N; i++) {
    dp[1 << i][i][i] = 0;
  }

  for (int i = 1; i < (1 << N); i++) {
    for (int j = 0; j < N; j++) {
      if (!((1 << j) & i))
        continue;

      for (auto c : adj[j]) {
        if (i & (1 << c.first))
          continue;

        for (int k = 0; k < N; k++) {
          int mask = i | (1 << c.first);
          dp[mask][k][c.first] =
              min(dp[mask][k][c.first], dp[i][k][j] + c.second);
        }
      }
    }
  }

  int mn = 1e9;
  for (int i = 0; i < N; i++) {
    for (auto &c : adj[i]) {
      mn = min(mn, dp[(1 << N) - 1][c.first][i] + c.second);
    }
  }

  cout << mn << '\n';

  return 0;
}

/*
4 5
0 1 3
0 2 4
1 2 2
2 3 2
3 0 5

*/