#include <bits/stdc++.h>
using namespace std;

int main(){
    cin.tie(0);
    ios::sync_with_stdio(false);
    int N, M;
    cin >> N >> M;
    vector<vector<int>> Es(N, vector<int>());
    vector<vector<int>> cs(N, vector<int>(N, 0));
    for (int i = 0; i < M; ++i){
        int a, b, c;
        cin >> a >> b >> c;
        Es[--a].push_back(--b);
        Es[b].push_back(a);
        if (c > cs[a][b]){
            cs[a][b] = c;
            cs[b][a] = c;
        }
    }
    vector<vector<int>> dp(1 << N, vector<int>(N, 0));
    for (int mask = 1; mask < (1 << N); ++mask){
        for (int p = 0; p < N; ++p){
            if ((mask & (1 << p)) == 0) continue;
            for (auto v : Es[p]){
                if (mask & (1 << v)) continue;
                int new_mask = mask | (1 << v);
                dp[new_mask][v] = max(dp[new_mask][v], dp[mask][p] + cs[p][v]);
            }
        }
    }
    int result = 0;
    for (int mask = 1; mask < (1 << N); ++mask){
        for (int p = 0; p < N; ++p){
            if (result < dp[mask][p]) result = dp[mask][p];
        }
    }
    cout << result << endl;
    return 0;
}