#include <bits/stdc++.h>
using namespace std;

#define int long long
#define rep(i,n) for(int i=0;i<(int)(n);i++)
#define repi(i,a,b) for(int i=(int)(a);i<(int)(b);i++)
#define all(x) (x).begin(),(x).end()
#define pb push_back
#define mp make_pair
#define mt make_tuple

typedef pair<int, int> pii;
typedef vector<int> vi;
typedef vector<vi> vvi;

const int inf = 1LL<<60;
const int mod = 1e9 + 7;
const double eps = 1e-9;

/*{
}*/

signed main()
{
  int n, m;
  cin >> n >> m;

  vi item1(m), item2(m), score(m); 
  rep(i, m){
    cin >> item1[i] >> item2[i] >> score[i];
  }

  vi num(n);
  iota(all(num), 0);
  int ans = 0;
  do{
    int s = 0;
    rep(i, m){
      if(num[item1[i]] < num[item2[i]]) s += score[i];
    }
    ans = max(ans, s);
  }while(next_permutation(all(num)));

  cout << ans << endl;

  return 0;
}