#include <iostream>
#include <vector>
#include <utility>
using namespace std;
int main(){
	int N, M;
	cin >> N >> M;
	vector<vector<pair<int, int>>> E(N);
	for (int i = 0; i < M; i++){
		int a, b, c;
		cin >> a >> b >> c;
		a--;
		b--;
		E[a].push_back(make_pair(c, b));
		E[b].push_back(make_pair(c, a));
	}
	vector<int> dp(1 << N, 0);
	for (int i = 1; i < (1 << N); i++){
		for (int j = 0; j < N; j++){
			if (i >> j & 1){
				for (auto P : E[j]){
					int k = P.second;
					if (!(i >> k & 1)){
						dp[i | (1 << k)] = max(dp[i | (1 << k)], dp[i] + P.first);
					}
				}
			}
		}
	}
	int ans = 0;
	for (int i = 0; i < (1 << N); i++){
		ans = max(ans, dp[i]);
	}
}