#include <iostream>
#include <algorithm>
using namespace std;
int main()
{
	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));
	while (m--) {
		int a, b, s; cin>>a>>b>>s;
		score[a][b]=s;
	}
	int res=0;
	do {
		int c=0;
		for(int i=0;i<n;++i) for(int j=i+1;j<n;++j) c+=score[a[i]][a[j]];
		res=max(res, c);
	} while (next_permutation(begin(a), end(a)));
	cout<<res<<endl;
}