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

signed main(){
  int N, M; cin >> N >> M;
  vector< tuple< int, int, int > > abv( M );
  for( int i = 0; i < M; ++i ){
    int a, b, v; cin >> a >> b >> v;
    abv[ i ] = tie( a, b, v );
  }
  int ans = 0;
  vector< int > item( N );
  for( int i = 0; i < N; ++i )
    item[ i ] = i;
  do{
    int sum = 0;
    vector< int > pos( N );
    for( int i = 0; i < N; ++i )
      pos[ item[ i ] ] = i;
    for( int i = 0; i < M; ++i ){
      int a, b, v; tie( a, b, v ) = abv[ i ];
      sum += ( pos[ a ] < pos[ b ] ) * v;
    }
    ans = max( ans, sum );
  } while( next_permutation( item.begin(), item.end() ) );
  cout << ans << endl;
  return 0;
}