#include <iostream>
#include <string>
#include <map>
#include <cmath>
#include <algorithm>
#include <vector>

using namespace std;

int main(void){
	int n,m;
	cin >> n >> m;
	vector<int> v(n);
	for(int i=0;i<n;i++){
		v[i] = i;
	}
	vector<int> item1(m),item2(m),score(m);
	for(int i=0;i<m;i++){
		cin >> item1[i] >> item2[i] >> score[i];
	}

	int ret = 0;
	do{
		int ans = 0;
		for(int i=0;i<m;i++){
			int i1,i2;
			for(int j=0;j<n;j++){
				if(item1[i] == v[j])i1 = j;
				if(item2[i] == v[j])i2 = j;
			}
			if(i1 < i2)ans += score[i];
		}
		ret = max(ret,ans);
	}while(next_permutation(v.begin(),v.end()));
	cout << ret << endl;

}