#include "bits/stdc++.h"
using namespace std;

struct item {
	int before;
	int after;
	long long score;
};

int main() {
	int N, M;
	long long ANS = 0;
	vector<int> V;
	item X[100];
	cin >> N >> M;
	for (int i = 0; i < N; i++) V.push_back(i);
	for (int i = 0; i < M; i++) {
		cin >> X[i].before >> X[i].after >> X[i].score;
	}
	do {
		int Y[9] = {};
		for (int i = 0; i < N; i++) {
			Y[V[i]] = i;
		}
		long long COUNT = 0;
		for (int i = 0; i < M; i++) {
			if (Y[X[i].before] < Y[X[i].after]) COUNT += X[i].score;
		}
		ANS = max(ANS, COUNT);
	} while (next_permutation(V.begin(), V.end()));
	cout << ANS << endl;
}