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

#define ll long long
#define rep(i, n) for (ll i = 0; i < n; ++i)
#define P pair<ll, ll>
#define Graph vector<vector<ll>>
#define fi first
#define se second
#define vvvvll vector<vector<vector<vector<ll>>>>
#define vvvll vector<vector<vector<ll>>>
#define vvll vector<vector<ll>>
#define vll vector<ll>
#define pqll priority_queue<ll>
#define pqllg priority_queue<ll, vector<ll>, greater<ll>>

constexpr ll INF = (1ll << 60);
constexpr ll mod = 1000000007;  // 998244353;
constexpr double pi = 3.14159265358979323846;
template <typename T>
inline bool chmax(T &a, T b) {
    if (a < b) {
        a = b;
        return 1;
    }
    return 0;
}
template <typename T>
inline bool chmin(T &a, T b) {
    if (a > b) {
        a = b;
        return 1;
    }
    return 0;
}

void pt_vvll(vvll v) {
    ll vs = v.size(), vs0 = v[0].size();
    rep(i, vs) {
        rep(j, vs0) {
            cout << v[i][j];

            if (j != vs0 - 1)
                cout << " ";
            else
                cout << "\n";
        }
    }
}
void pt_vll(vll v) {
    ll vs = v.size();
    rep(i, vs) {
        cout << v[i];
        if (i == vs - 1)
            cout << "\n";
        else
            cout << " ";
    }
}

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

    ll N, M;
    cin >> N >> M;
    vll vec(N);
    vvll score(M, vll(3));
    rep(i, N) { vec[i] = i; }
    rep(i, M) {
        rep(j, 3) { cin >> score[i][j]; }
    }

    ll ans = 0;

    do {
        ll sum = 0;
        vll rule(N);
        rep(i, N) { rule[vec[i]] = i; }
        rep(i, M) {
            if (rule[score[i][0]] < rule[score[i][1]]) sum += score[i][2];
        }
        chmax(ans, sum);
    } while (next_permutation(vec.begin(), vec.end()));

    cout << ans << "\n";
    return 0;
}