import java.io.*;
import java.util.*;

public class Main {
    static ArrayList<HashMap<Integer, Integer>> scores = new ArrayList<>();
    static int max = 0;
    static int n;
    public static void main(String[] args) throws Exception {
        Scanner sc = new Scanner();
        n = sc.nextInt();
        int m = sc.nextInt();
        for (int i = 0; i < n; i++) {
            scores.add(new HashMap<>());
        }
        for (int i = 0; i < m; i++) {
            int a = sc.nextInt();
            int b = sc.nextInt();
            scores.get(b).put(a, sc.nextInt());
        }
        check(0, new boolean[n], 0);
        System.out.println(max);
    }
    
    static void check(int idx, boolean[] used, int value) {
        if (idx >= n) {
            max = Math.max(max, value);
            return;
        }
        for (int i = 0; i < n; i++) {
            if (used[i]) {
                continue;
            }
            used[i] = true;
            int tmp = 0;
            for (int x : scores.get(i).keySet()) {
                if (used[x]) {
                    tmp += scores.get(i).get(x);
                }
            }
            check(idx + 1, used, value + tmp);
            used[i] = false;
        }
    }
}
class Scanner {
    BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
    StringTokenizer st = new StringTokenizer("");
    
    public Scanner() throws Exception {
        
    }
    
    public int nextInt() throws Exception {
        return Integer.parseInt(next());
    }
    
    public long nextLong() throws Exception {
        return Long.parseLong(next());
    }
    
    public double nextDouble() throws Exception {
        return Double.parseDouble(next());
    }
    
    public String next() throws Exception {
        while (!st.hasMoreTokens()) {
            st = new StringTokenizer(br.readLine());
        }
        return st.nextToken();
    }
}