#include<iostream>
#include<iomanip>
#include<string>
#include<algorithm>
#include<vector>
#include<set>
#include<list>
#include<queue>
#include<math.h>
#include<bitset>
using ll = long long;
using namespace std;



int main(){
    ll n, m, ans = 0;
    cin >> n >> m;
    vector<vector<int>> list(m, vector<int>(3));
    vector<int> arr(n);
    for (int i = 0; i < n; i++) arr[i] = i;
    for (int i = 0; i < m; i++) cin >> list[i][0] >> list[i][1] >> list[i][2];
    
    do {
        ll tmp = 0;
        for (int i = 0; i < m; i++){
            int f, b;
            for (int j = 0; j < n; j++){
                if (arr[j] == list[i][0]) f = j;
                if (arr[j] == list[i][1]) b = j;
            }
            if (f < b) tmp += list[i][2];
        }
        ans = max(ans, tmp);
    }while (next_permutation(arr.begin(), arr.end()));
    cout << ans << endl;
}