#define _USE_MATH_DEFINES
#include <bits/stdc++.h>
using namespace std;
signed main() { 
  ios::sync_with_stdio(false); cin.tie(0); 
  int n, m;
  cin >> n >> m;
  vector<vector<int>> g(n, vector<int>(n));
  for (int i = 0; i < m; i++) {
    int u, v, c;
    cin >> u >> v >> c;
    u--;
    v--;
    g[u][v] = g[v][u] = max(g[u][v], c);
  }
  vector<vector<long long>> dp(1 << n, vector<long long>(n, -1));
  for (int i = 0; i < n; i++) dp[1 << i][i] = 0;
  for (int st = 0; st < (1 << n); st++) {
    for (int i = 0; i < n; i++) {
      if (dp[st][i] == -1) continue;
      for (int j = 0; j < n; j++) {
        if (g[i][j] == 0) continue;
        if (st & (1 << j)) continue;
        dp[st | (1 << j)][j] = max(dp[st | (1 << j)][j], dp[st][i] + g[i][j]);
      }
    }
  }
  long long ans = 0;
  for (int i = 0; i < (1 << n); i++) {
    for (int j = 0; j < n; j++) {
      ans = max(ans, dp[i][j]);
    }
  }
  cout << ans << endl;
  return 0;
}