#include<cstdio>
#include<algorithm>
#include<numeric>
#include<vector>
#define rep(i,a) for(int i=0;i<(a);++i)
#define all(a) (a).begin(), (a).end()

const int MAX_N = 9, MAX_M = 72;

int N, M;
int item[2][MAX_M], score[MAX_M];

int main()
{
	scanf( "%d%d", &N, &M );
	rep( i, M )
		scanf( "%d%d%d", item[0]+i, item[1]+i, score+i );

	std::vector<int> v( N );
	std::iota( all(v), 0 );

	int ans = 0;
	do
	{
		int cnt = 0;
		rep( i, M ) if( std::find( all(v), item[0][i] )-v.begin() < std::find( all(v), item[1][i] )-v.begin() )
			cnt += score[i];
	
		ans = std::max( ans, cnt );
	} while( std::next_permutation( all(v) ) );

	printf( "%d\n", ans );

	return 0;
}