#include <stdio.h>
#include <bits/stdc++.h>
#include <atcoder/all>
using namespace atcoder;
using mint = modint1000000007;
using namespace std;
#define rep(i,n) for (int i = 0; i < (n); ++i)
#define Inf 100000000000000000


int main(){
	
	int N,M;
	cin>>N>>M;
	
	vector<int> a(M),b(M),s(M);
	rep(i,M)cin>>a[i]>>b[i]>>s[i];
	
	vector<int> t(N);
	rep(i,N)t[i] = i;
	
	int ans = 0;
	
	do{
		int sum = 0;
		rep(i,M){
			if(t[a[i]]<t[b[i]])sum += s[i];
		}
		ans = max(ans,sum);
	}
	while(next_permutation(t.begin(),t.end()));
	
	cout<<ans<<endl;
	
	return 0;
}