#include <iostream>
#include <algorithm>
#include <vector>
#include <stdio.h>
#include <cmath>

using namespace std;
typedef uint uint32_t;

int N, M;
int scores[9][9] = {};
int score_f[9] = {}, score_b[9] = {};

void debug_print() {
    for (int i = 0; i < N; i++) {
        for (int j = 0; j < N; j++) {
            cout << scores[i][j] << '\t';
        }
        cout << score_b[i] << endl;
    }
    for (int i = 0; i < N; i++) {
        cout << score_f[i] << '\t';
    }
    cout << '\n' << endl;
}

int main() {
    cin >> N >> M;
    int i,j,s;
    for (int k = 0; k < M; k++) {
        cin >> i >> j >> s;
        scores[i][j] = s;
        score_f[j] += s;
        score_b[i] += s;
    }

    
    int ans[9] = {};
    int used[9] = {};
    for (int i = 0; i < N; i++) {
        // debug_print();
        int v=-1000, id=-1;
        for (int j = 0; j < N; j++) {
            if (used[j]) continue;
            if (score_b[j] - score_f[j] > v) {
                v = score_b[i] - score_f[i];
                id = j;
            }
        }
        ans[i] = id;
        used[id] = 1;
        for (int j = 0; j < N; j++) {
            score_b[j] -= scores[j][id];
            score_f[j] -= scores[id][j];
            // scores[id][j] = 0;
            // scores[j][id] = 0;
        }
        score_f[id] = 0;
        score_b[id] = 0;
    }
    
    // for (int i = 0; i < N; i++) {
    //     cout << ans[i] << ' ';
    // }
    // cout << endl;
    s = 0;
    for (int i = 0; i < N - 1; i++) {
        for (int j = i+1; j < N; j++) {
            s += scores[ans[i]][ans[j]];
        }
    }
    cout << s << endl;
}