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

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++){
		used[i] = 1;
		ans = max(ans, dfs(i, 0));
		used[i] = 0;
	}
	cout << ans << endl;
	
	return 0;
}