#include<bits/stdc++.h>
using namespace std;
using Int = long long;
template<typename T1,typename T2> inline void chmin(T1 &a,T2 b){if(a>b) a=b;}
template<typename T1,typename T2> inline void chmax(T1 &a,T2 b){if(a<b) a=b;}

//INSERT ABOVE HERE
Int dp[16][1<<16];
signed main(){
  Int n,m;
  cin>>n>>m;
  Int es[20][20];
  memset(es,-1,sizeof(es));
  for(Int i=0;i<m;i++){
    Int a,b,c;
    cin>>a>>b>>c;
    a--;b--;
    chmax(es[a][b],c);
    chmax(es[b][a],c);
  }
  Int ans=0;
  Int s=1<<n;
  memset(dp,-1,sizeof(dp));
  for(Int i=0;i<n;i++) dp[i][1<<i]=0;
  for(Int b=0;b<s;b++){
    for(Int i=0;i<n;i++){
      if(dp[i][b]<0) continue;
      chmax(ans,dp[i][b]);
      for(Int j=0;j<n;j++){
        if((b>>j)&1) continue;
        if(es[i][j]<0) continue;
        chmax(dp[j][b|(1<<j)],dp[i][b]+es[i][j]);
      }
    }
  }
  cout<<ans<<endl;
  return 0;
}