#include<bits/stdc++.h>
 
using namespace std;
 
#define INF 1000000007
#define LINF 1000000000000000007
 
typedef long long i64;
typedef pair<i64,i64> P;


int n, m;
vector<P> v[20];
bool used[20];
i64 dp[(1 << 17)][17];

i64 dfs(int now, i64 score, int was){
	if(dp[was][now] != 0) return dp[was][now];
	for(int i = 0; i < v[now].size(); i++){
		if(used[v[now][i].first]) continue;
		used[now] = 1;
		dp[was][now] = max(dp[was][now], dfs(v[now][i].first, score, was + (1 << v[now][i].first)) + v[now][i].second);
		used[v[now][i].first] = 0;
	}
	return dp[was][now];
}

int main(){
	cin >> n >> m;
	for(int i = 0; i < m; i++){
		i64 a,b,c;
		cin >> a >> b >> c;
		v[a].push_back(P(b,c));
		v[b].push_back(P(a,c));
	}
	for(int i = 0; i < n; i++){
		sort(v[i].begin(), v[i].end(), greater<P>());
	}
	
	i64 ans = 0;
	for(int i = 1; i <= n; i++){
		for(int j = 0; j < (1 << 17); j++) for(int k = 0; k < 17; k++){
			dp[j][k] = 0;
		}
		used[i] = 1;
		ans = max(ans, dfs(i, 0, (1 << i)));
		used[i] = 0;
	}
	cout << ans << endl;
	
	return 0;
}