#include<iostream>
#include<vector>
#include<algorithm>
using namespace std;
int main(void){
	int n, m; cin >> n >> m;

	vector<int> a(n);
	for (int i = 0; i < n; i++) a[i] = i;

	vector<vector<int>> score(n, vector<int>(n));
	for (int i = 0; i < m; i++){
		int i1, i2, sc; cin >> i1 >> i2 >> sc;
		score[i1][i2] = sc;
	}

	int ans = 0;
	do{
		int tmp = 0;
		for (int i = 0; i < n; i++){
			for (int j = i+1; j < n; j++){
				tmp += score[a[i]][a[j]];
			}
		}
		ans = max(ans, tmp);
	} while (next_permutation(begin(a), end(a)));

	cout << ans << endl;
	return 0;
}