#include <iostream>
using namespace std;

int N, M;
int score[11][11];

int dfs(int mask){
	int res = 0;
	for(int i=0;i<N;i++){
		if((mask >> i) & 1)continue;

		int tmp = 0;
		for(int j=0;j<N;j++){
			if((mask >> j) & 1){
				tmp += score[j][i];
			}
		}

		tmp += dfs(mask | (1 << i));
		res = max(res, tmp);
	}
	return res;
}

int main(){
	cin >> N >> M;
	for(int i=0;i<M;i++){
		int a, b, c;
		cin >> a >> b >> c;

		score[a][b] = c;
	}

	cout << dfs(0) << endl;
	return 0;
}