using System;
using System.Collections;
using System.Collections.Generic;
using System.Linq;
using System.Text;

class TEST{
	static void Main(){
		Sol mySol =new Sol();
		mySol.Solve();
	}
}

class Sol{
	public void Solve(){
		
		//int Inf =(int) 1e9;
		int[][] m = new int[N][];
		for(int i=0;i<N;i++){
			m[i] = new int[N];
			for(int j=0;j<N;j++){
				m[i][j] = -1;
			}
		}
		
		for(int i=0;i<M;i++){
			m[A[i]][B[i]] = Math.Max(m[A[i]][B[i]], C[i]);
			m[B[i]][A[i]] = m[A[i]][B[i]];
		}
		
		int[][] dp = new int[N][];
		for(int i=0;i<N;i++){
			dp[i] = new int[1<<N];
			for(int j=0;j<1<<N;j++){
				dp[i][j] = -1;
			}
		}
		
		for(int i=0;i<N;i++) dp[i][1<<i] = 0;
		for(int i=0;i<(1<<N);i++){
			for(int j=0;j<N;j++){
				if(dp[j][i] == -1) continue;
				for(int k=0;k<N;k++){
					if((i >> k) % 2 == 0 && m[j][k] != -1){
						dp[k][i | (1 << k)] = Math.Max(dp[k][i | (1 << k)], dp[j][i] + m[j][k]);
					}
				}
			}
		}
		
		Console.WriteLine(dp.Select(ar => ar.Max()).Max());
		
		
		
		
	}
	int N,M;
	int[] A,B,C;
	public Sol(){
		var d = ria();
		N = d[0]; M = d[1];
		A = new int[M];
		B = new int[M];
		C = new int[M];
		for(int i=0;i<M;i++){
			d = ria();
			A[i] = d[0] - 1; B[i] = d[1] - 1; C[i] = d[2];
		}
	}

	static String rs(){return Console.ReadLine();}
	static int ri(){return int.Parse(Console.ReadLine());}
	static long rl(){return long.Parse(Console.ReadLine());}
	static double rd(){return double.Parse(Console.ReadLine());}
	static String[] rsa(char sep=' '){return Console.ReadLine().Split(sep);}
	static int[] ria(char sep=' '){return Array.ConvertAll(Console.ReadLine().Split(sep),e=>int.Parse(e));}
	static long[] rla(char sep=' '){return Array.ConvertAll(Console.ReadLine().Split(sep),e=>long.Parse(e));}
	static double[] rda(char sep=' '){return Array.ConvertAll(Console.ReadLine().Split(sep),e=>double.Parse(e));}
}