#include <bits/stdc++.h>

using namespace std;

int main() {
	int n, m;
	cin >> n >> m;
	vector<int> item1(m), item2(m), score(m);
	for (int i = 0;i < m;i++) {
		cin >> item1[i] >> item2[i] >> score[i];
	}

	vector<int> v(n);
	iota(v.begin(), v.end(), 0);
	int sum_max = 0;
	do {
		int sum = 0;
		for (int i = 0;i < m;i++) {
			if (v[item1[i]] < v[item2[i]]) {
				sum += score[i];
			}
		}
		sum_max = max(sum_max, sum);
	} while (next_permutation(v.begin(), v.end()));
	cout << sum_max << endl;

	return 0;
}