#include <stdio.h>
#include <stdlib.h>
#include <stdbool.h>
#include <string.h>
#include <math.h>
#include <limits.h>
#define Max(a, b) ((a) > (b) ? (a) : (b))
#define Min(a, b) ((a) > (b) ? (b) : (a))
#define abs(x) ((x) > 0 ? (x) : -(x))
#define rep(i, n) for(int i = 0; i < (n); i++)
#define MOD 1000000007 //10^9 + 7
#define endl printf("\n")
typedef long long ll;
#define MAX_N 16

int dp[1 << MAX_N][MAX_N];
int n, d[MAX_N][MAX_N];

int
rec(int s, int v)
{
  if (dp[s][v] > 0) return dp[s][v];

  int r = 0;
  for (int i = 0; i < n; i++) {
    if ((!(s >> i & 1)) && d[v][i] != 0) {
      r = Max(r, rec(s | 1 << i, i) + d[v][i]);
    }
  }

  return dp[s][v] = r;
}

int
main(int argc, char **argv)
{
  int m;
  scanf("%d %d", &n, &m);
  int a, b, c;
  for (int i = 0; i < m; i++) {
    scanf("%d %d %d", &a, &b, &c);
    a--; b--;
    d[a][b] = Max(d[a][b], c);
    d[b][a] = Max(d[b][a], c);
  }

  int ans = 0;
  for (int i = 0; i < n; i++) {
    ans = Max(ans, rec(1 << i, i));
  }

  printf("%d\n", ans);

  return 0;
}