#include <bits/stdc++.h>
    using namespace std;
    
    using VS = vector<string>;    using LL = long long;
    using VI = vector<int>;       using VVI = vector<VI>;
    #define ALL(a)  begin((a)),end((a))
    #define FOR(i, s, e) for (int(i) = (s); (i) < (e); (i)++)
    
    LL ans = 0LL;
    
    int main() {
    	cin.tie(0);
    	ios_base::sync_with_stdio(false);
    
    	int N, M; cin >> N >> M;
    	using tp = tuple<int, int, int>;
    	vector<tp>rules(M);
    	FOR(i, 0, M) {
    		int a, b, c; cin >> a >> b >> c;
    		rules[i] = tp(a, b, c);
    	}
    
    	VI a(N, 0);
    	iota(ALL(a), 0);
    
    	do {
    		LL ret = 0;
			VI b(N);
			FOR(j, 0, N) {
				b[a[j]] = j;
			}
    		for (tp& rule : rules) {

    			int x, y, z; tie(x, y, z) = rule;
    			if (b[x] < b[y]) {
    				ret += z;
    			}
    		}
    
    		ans = max(ans, ret);
    	} while (next_permutation(ALL(a)));
    
    	cout << ans << "\n";
    
    	return 0;
    }