#include <iostream>
using namespace std;
struct Data {
	int i1, i2, s;
};

int n, m, maxi = 0, counta = 0;
int* dp;
bool* flag;
Data* datas;

void arrainment(int now){
	if (now >= n) {
		for (int i = 0; i < m; ++i) {
			if (dp[datas[i].i1] < dp[datas[i].i2]) {
				counta += datas[i].s;
			}
		}
		if (maxi < counta) {
			maxi = counta;
		}
		counta = 0;
	}
	for (int i = 0; i < n; ++i) {
		if (!flag[i]) {
			dp[now] = i;
			flag[i] = true;
			arrainment(now + 1);
			flag[i] = false;
		}
	}
}

int main() {
	cin >> n;
	cin >> m;
	dp = new int[n];
	flag = new bool[n];
	for (int i = 0; i < n; ++i) {
		dp[i] = i;
		flag[i] = false;
	}
	datas = new Data[m];
	for (int i = 0; i < m; ++i) {
		cin >> datas[i].i1;
		cin >> datas[i].i2;
		cin >> datas[i].s;
	}
	arrainment(0);
	cout << maxi << endl;
}