#include "bits/stdc++.h"
using namespace std;
     
#define DEBUG(x) cout<<#x<<": "<<x<<endl;
#define DEBUG_VEC(v) cout<<#v<<":";for(int i=0;i<v.size();i++) cout<<" "<<v[i]; cout<<endl
     
typedef long long ll;
#define vi vector<int>
#define vl vector<ll>
#define vii vector< vector<int> >
#define vll vector< vector<ll> >
#define vs vector<string>
#define pii pair<int,int>
#define pis pair<int,string>
#define psi pair<string,int>
const int inf = 1000000001;
const ll INF = 1e16;
#define MOD 1000000007
#define mod 1000000009
#define pi 3.14159265358979323846
#define Sp(p) cout<<setprecision(15)<<fixed<<p<<endl;
int dx[4] = { 1,0,-1,0 }, dy[4] = { 0,1,0,-1 };
int dx2[8] = { 1,1,0,-1,-1,-1,0,1 }, dy2[8] = { 0,1,1,1,0,-1,-1,-1 };

int main() {
  int n, m, i, j;
  cin >> n >> m;
  vii hyou(n, vi(n));
  for (i = 0; i < m; i++) {
    int i1, i2, s;
    cin >> i1 >> i2 >> s;
    hyou[i1][i2] = s;
  }
  vi jun(n);
  for (i = 0; i < n; i++) {
    jun[i] = i;
  }
  int ans = -1;
  do {
    int temp = 0;
    for (i = 0; i < n; i++) {
      for (j = i+1; j < n; j++) {
	temp += hyou[jun[i]][jun[j]];
      }
    }
    ans = max(ans, temp);
  }while(next_permutation(jun.begin(), jun.end()));
  cout << ans << endl;
}

/*
4 9
0 1 1
0 2 2
0 3 3
1 2 4
1 3 5
2 3 6
3 2 100
2 1 100
1 0 100
*/