#include <bits/stdc++.h>
#include <cmath>
//#include <ranges>
using ll=long long;
#define rep(i,a,b) for(int i=a;i<b;i++)
#define chmin(x,b) x=min(x,b)
using namespace std;
#define fi first
#define se second
using P=pair<int,int>;
using PD=pair<double,double>;
using PL=pair<ll,ll>;
int mod1=998244353;
int mod2=1000000007;
const ll INF = 1e18;
const int big = 2147483647;
int value[2000010],NN=1,lazy[2000010];
bool jud[2000010];

struct st{
    ll x,y,z;
    st(ll x=0,ll y=0,ll z=0):x(x),y(y),z(z){}
    bool operator>(const st &a)const{
        return x>a.x;
    }
};
int pr[20][20];
ll dp[100000];
int main(){
    ll n,q,y=0,i,z=0,x=0,d=0,k,L,nk,sum=0,T;
    ll ans=INF,sum2=0,rs=-1e9,cs=0,l=0,h=0,w=0,r=0,X;
    ll tmp2=0,flag=0,a=0,b=0,c=0,j=0,m=0,p,S,K;
    ll N,M=0;
    cin>>N>>M;
    rep(i,0,1<<N)dp[i]=-INF;
    rep(i,0,M){
        cin>>x>>y>>z;
        pr[x][y]=z;
        dp[(1<<x)|(1<<y)]=pr[x][y];
    }
    rep(i,0,1<<N){
        rep(j,0,N){
            if((i>>j)&1)continue;
            rep(k,0,N){
            if(!((i>>k)&1))continue;
            dp[i | (1<<j)]=max(dp[i | (1<<j)],dp[i]+pr[k][j]);
        }
        }
    }
    cout<<dp[(1<<N)-1]<<endl;
    }