#include "bits/stdc++.h"
using namespace std;
using ll = long long;
using pii = pair<int, int>;
using pll = pair<ll, ll>;
using vi = vector<int>;
using vl = vector<ll>;
using vvi = vector<vi>;
using vvl = vector<vl>;
const int INF = 1 << 28;
const ll MOD = 1000000007;
template <class T>
bool chmax(T &a, const T &b) {
    return (a < b) ? (a = b, 1) : 0;
}
template <class T>
bool chmin(T &a, const T &b) {
    return (b < a) ? (a = b, 1) : 0;
}

ll dp[(1 << 16) - 1][16];
vector<vector<pll>> edge(16);

ll rec(int s, int v) {
    if (dp[s][v] >= 0)
        return dp[s][v];
    ll ret = 0;
    for (auto &e : edge[v]) {
        if (!(s >> e.first & 1)) {
            chmax(ret, rec(s | 1 << e.first, e.first) + e.second);
        }
    }
    return dp[s][v] = ret;
}

int main() {
    int n, m;
    cin >> n >> m;
    for (int i = 0; i < m; ++i) {
        int a, b, c;
        cin >> a >> b >> c;
        a--;
        b--;
        edge[a].emplace_back(b, c);
        edge[b].emplace_back(a, c);
    }
    for (int i = 0; i < n; ++i) {
        for (int j = 0; j < 1 << n; ++j) {
            dp[j][i] = -1;
        }
    }

    for (int i = 0; i < n; ++i) {
        rec(1 << i, i);
    }
    ll ret = 0;
    for (int i = 0; i < n; ++i) {
        for (int j = 0; j < 1 << n; ++j) {
            chmax(ret, dp[j][i]);
        }
    }
    cout << ret << "\n";
    return 0;
}