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

template<typename T>
istream &operator>>(istream &is,vector<T> &a){
    for(auto &v : a) cin >> v;
    return is;
}
template<typename T>
ostream &operator<<(ostream &os,const vector<T> &a){
    if(a.size() == 0) return os;
    cout << a.at(0);
    for(int i=1; i<a.size(); i++) cout << " " << a.at(i);
    cout << "\n";
    return os;
}

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

    int N,M; cin >> N >> M;
    vector<vector<int>> S(N,vector<int>(N));
    while(M--){
        int a,b,s; cin >> a >> b >> s;
        S.at(a).at(b) = s;
    }

    vector<int> P(N);
    iota(P.begin(),P.end(),0);

    int answer = 0;
    do{
        int now = 0;
        for(int i=0; i<N; i++) for(int k=i+1; k<N; k++) now += S.at(P.at(i)).at(P.at(k));
        answer = max(answer,now);
    }while(next_permutation(P.begin(),P.end()));
    cout << answer << endl;
}