#include <ctime>
#include <iostream>// io
#include <iomanip>
#include <fstream>
#include <sstream>
#include <vector>// container
#include <map>
#include <set>
#include <queue>
#include <bitset>
#include <stack>
#include <algorithm>// other
#include <utility>
#include <complex>
#include <numeric>
#include <functional>
#include <random>
#include <regex>

using namespace std;
typedef long long ll;

#define ALL(c) (c).begin(),(c).end()
#define FOR(i,l,r) for(int i=(int)l;i<(int)r;++i)
#define REP(i,n) FOR(i,0,n)
#define FORr(i,l,r) for(int i=(int)r-1;i>=(int)l;--i)
#define REPr(i,n) FORr(i,0,n)
#define EACH(i,c) for(__typeof((c).begin()) i=(c).begin(); i!=(c).end(); ++i)
#define IN(l,v,r) ((l)<=(v) && (v)<(r))
#define UNIQUE(v) v.erase(unique(ALL(v)),v.end())
//debug
#define DUMP(x)  cerr << #x << " = " << (x)
#define LINE()    cerr<< " (L" << __LINE__ << ")"

template<typename T,typename U> T pmod(T x,U M){return (x%M+M)%M;}

stringstream ss;

int main(){
	cin.tie(0); ios::sync_with_stdio(false);
	ss   <<fixed <<setprecision(20);
	cout <<fixed <<setprecision(20);

	int N,M;cin >> N >> M;
	vector<int> item1(M),item2(M),score(M);
	REP(i,M)cin >> item1[i] >> item2[i] >> score[i];

	vector<int> per(N);iota(ALL(per),0);
	ll Mv=0;
	do{
		ll v=0;
		REP(i,M)if(per[item1[i]]<per[item2[i]])v+=score[i];
		Mv=max(Mv,v);
	}while(next_permutation(ALL(per)));
	cout << Mv <<endl;

 	return 0;
 }