#include <bits/stdc++.h>

using namespace std;

#define REP(i,a,b) for(int i=a;i<(int)b;i++)
#define rep(i,n) REP(i,0,n)

string ban[2] = {"oda", "yukiko"};

#define SQ(x) ((x)*(x))

int main() {
  
  int N, M; cin >> N >> M;
  int score[10][10] = {};
  rep(i, M) {
    int a, b; cin >> a >> b;
    cin >> score[a][b];
  }
  
  int per[N]; rep(i, N) per[i] = i;
  int ans = 0;
  do {
    int sum = 0;
    rep(i, N) REP(j, i, N) {
      int a = per[i], b = per[j];
      if(a > b) swap(a, b);
      sum += score[per[i]][per[j]];
    }
    ans = max(ans, sum);
  } while(next_permutation(per, per+N));
  
  cout << ans << endl;
  
  return 0;
}