#include <bits/stdc++.h>
using namespace std;
#define rep(i, n) for (int i = 0; i < (int)(n); i++)
#define srep(i, s, n) for (int i=(s); i < (int)(n); i++)
#define all(v) v.begin(), v.end()
#define fore(i,x) for(auto i:x)
#define pb push_back

using vi=vector<int>;
using vvi=vector<vi>;
using vb=vector<bool>;
using vvb=vector<vb>;
using vs=vector<string>;
using vll=vector<long long>;
using vvll=vector<vll>;
using vc=vector<char>;
using vvc=vector<vc>;
using ll=long long;

void Yes(bool ok){ cout << (ok ? "Yes" : "No") << "\n";}

int main(){
    int N,M; cin >> N >> M;
    vi item1(M),item2(M),score(M);
    rep(i,M) cin >> item1.at(i) >> item2.at(i) >> score.at(i);
    vi v(N);
    rep(i,N) v.at(i)=i;
    int ans=0;
    do{
        int tmp=0;
        rep(i,M){
            if(v.at(item1.at(i))<v.at(item2.at(i))) tmp+=score.at(i);
        }
        ans=max(ans,tmp);
    }while(next_permutation(all(v)));
    cout << ans << "\n";
}