#define _CRT_SECURE_NO_WARNINGS
#include <iostream>
#include <cstdio>
#include <cstring>
#include <ctime>
#include <string>
#include <vector>
#include <stack>
#include <queue>
#include <map>
#include <set>
#include <algorithm>
#include <cmath>
#include <sstream>
using namespace std;
typedef long long ll;
typedef vector<int> vi;
typedef vector<vi> vvi;
typedef vector<string> vs;
#define all(c) (c).begin(), (c).end()
#define loop(i,a,b) for(ll i=a; i<ll(b); i++)
#define rep(i,b) loop(i,0,b)
#ifdef DEBUG
#define dump(...) (cerr<<#__VA_ARGS__<<" = "<<(DUMP(),__VA_ARGS__).str()<<" ["<<__LINE__<<"]"<<endl)
struct DUMP:ostringstream{template<class T>DUMP &operator,(const T&t){if(this->tellp())*this<<", ";*this<<t;return *this;}};
#else
#define dump(...)
#endif
typedef double R;

const double pi = acos(-1);

int main(){
    int n;
    while(cin>>n){
        int m;cin>>m;
        vi pos(n);
        vi a(m), b(m), score(m);
        rep(i,m)cin>>a[i]>>b[i]>>score[i];
        rep(i,n)pos[i]=i;
        int ans=0;
        do{
            int sum=0;
            rep(i,m){
                if(pos[a[i]] < pos[b[i]])sum+=score[i];
            }
            ans = max(ans,sum);
        }while(next_permutation(all(pos)));
        cout << ans << endl;
    }
}