#include "bits/stdc++.h"
using namespace std;
#define FOR(i,j,k) for(int (i)=(j);(i)<(int)(k);++(i))
#define rep(i,j) FOR(i,0,j)
#define each(x,y) for(auto &(x):(y))
#define mp make_pair
#define all(x) (x).begin(),(x).end()
#define debug(x) cout<<#x<<": "<<(x)<<endl
#define smax(x,y) (x)=max((x),(y))
#define smin(x,y) (x)=min((x),(y))
#define MEM(x,y) memset((x),(y),sizeof (x))
#define sz(x) (int)(x).size()
typedef long long ll;
typedef pair<int, int> pii;
typedef vector<int> vi;
typedef vector<ll> vll;

int N, M, aai[14][14], dp[1 << 14];

int main(){
    cin >> N >> M;
    rep(i, M){
        int x, y, score;
        cin >> x >> y >> score;
        aai[x][y] = score;
    }
    rep(S, 1 << N){
        rep(addItem, N)if((S>>addItem&1)==0){
            int addPoint = 0;
            rep(preItem, N){
                if(S >> preItem & 1){
                    addPoint += aai[preItem][addItem];
                }
            }
            smax(dp[1 << addItem | S], dp[S] + addPoint);
        }
    }
    cout << dp[(1 << N) - 1] << endl;
}