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

int A[ 20 ];
int B[ 10 ][ 10 ];

int main()
{
int i;
int j;
int a;
int b;
int c;
int N;
int M;
int iScore;
int iMax;

	cin >> N;
	cin >> M;

	for( i = 0; i < M; i++ )
	{
		cin >> a;
		cin >> b;
		cin >> c;
		B[ a ][ b ] = c;
	}

	for( i = 0; i < N; i++ ) A[ i ] = i;

	iMax = 0;
	do
	{
		iScore = 0;
		for( i = 1; i < N; i++ )
		{
			for( j = 0; j < i; j++ )
				iScore += B[ A[ j ] ][ A[ i ] ];
		}

		if( iMax < iScore ) iMax = iScore;
	}
	while( next_permutation( A, A + N ) );

	cout << iMax << endl;

	return 0;
}