#include <cstdio>
#include <iostream>
#include <sstream>
#include <fstream>
#include <iomanip>
#include <algorithm>
#include <cmath>
#include <string>
#include <vector>
#include <list>
#include <queue>
#include <stack>
#include <set>
#include <map>
#include <bitset>
#include <numeric>
#include <limits>
#include <climits>
#include <cfloat>
#include <functional>
using namespace std;

int main()
{
    int n, m;
    cin >> n >> m;
    vector<int> a(m), b(m), score(m);
    for(int i=0; i<m; ++i)
        cin >> a[i] >> b[i] >> score[i];

    vector<int> x(n);
    for(int i=0; i<n; ++i)
        x[i] = i;
    
    int ret = 0;
    do{
        int sum = 0;
        for(int i=0; i<m; ++i){
            if(x[a[i]] < x[b[i]])
                sum += score[i];
        }
        ret = max(ret, sum);
    }while(next_permutation(x.begin(), x.end()));
    cout << ret << endl;

    return 0;
}