#include "bits/stdc++.h"
using namespace std;
#define ll long long int
#define rep(i,n) for( int i = 0; i < n; i++ )
#define rrep(i,n) for( int i = n; i >= 0; i-- )
#define REP(i,s,t) for( int i = s; i <= t; i++ )
#define RREP(i,s,t) for( int i = s; i >= t; i-- )
#define dump(x)  cerr << #x << " = " << (x) << endl;
#define INF 2000000000
#define mod 1000000007
#define INF2 1000000000000000000


int main(void)
{
    cin.tie(0);
    ios::sync_with_stdio(false);
	int N, M;
	cin >> N >> M;
	int item1[100], item2[100], score[100];
	rep(i, M) {
		cin >> item1[i] >> item2[i] >> score[i];
	}
	int a[10];
	rep(i, N) a[i] = i;
	int ans = 0;
	do {
		int tmp = 0;
		int num[10];
		rep(i, N) num[a[i]] = i;
		rep(i, M) {
			if (num[item1[i]] < num[item2[i]]) tmp += score[i];
		}
		ans = max(ans, tmp);
		
	}while(next_permutation(a, a + N));
	cout << ans << endl;

    return 0;
}