#include <iostream>
#include <algorithm>
#include <cmath>
#include <vector>
#include <complex>
#include <queue>
#include <deque>
#include <set>
#include <map>
#include <unordered_set>
#include <unordered_map>
#include <iomanip>
#include <assert.h>
#include <array>
#include <cstdio>
#include <cstring>
#include <random>
#include <functional>
#include <numeric>
#include <bitset>

using namespace std;

struct before_main{before_main(){cin.tie(0); ios::sync_with_stdio(false);}} before_main;

#define REP(i,a,b) for(int i=a;i<(int)b;i++)
#define rep(i,n) REP(i,0,n)
#define all(c) (c).begin(), (c).end()
#define zero(a) memset(a, 0, sizeof a)
#define minus(a) memset(a, -1, sizeof a)
template<class T1, class T2> inline bool minimize(T1 &a, T2 b) { return b < a && (a = b, 1); }
template<class T1, class T2> inline bool maximize(T1 &a, T2 b) { return a < b && (a = b, 1); }

typedef long long ll;
int const inf = 1<<29;

int G[14][14];

int main() {

  int N, M; cin >> N >> M;
  rep(i, M) {
    int i1, i2, c; cin >> i1 >> i2 >> c;
    G[i1][i2] = c;
  }

  static int dp[1<<14];

  rep(S, 1<<N) {
    rep(i, N) {
      if(!(S >> i & 1)) {
        int sum = 0;
        rep(j, N) { if(S >> j) { sum += G[j][i]; } }
        maximize(dp[S|(1<<i)], dp[S] + sum);
      }
    }
  }

  cout << dp[(1<<N)-1] << endl;
  
  return 0;
}