#include<bits/stdc++.h>
using namespace std;
#define vi vector<int>
#define vvi vector<vi>
#define vs vector<string>
#define pb push_back
#define P pair<int,int>
#define vp vector<P>
#define PP pair<P,int>
#define vpp vector<PP>
#define fi first
#define se second
#define INF (1<<30)
#define MOD 1000000007
#define REP(i,n) for(int i=0;i<n;i++)
#define REPR(i,n) for(int i=n;i>=0;i--)
#define FOR(i,m,n) for(int i=m;i<n;i++)
#define all(x) (x).begin(),(x).end()
int main(){
    int n,m;
    cin>>n>>m;
    vvi d(n,vi(n));
    REP(i,m){
        int a,b,c;
        cin>>a>>b>>c;
        d[b][a]=c;
    }
    vi vec;
    REP(i,n)vec.pb(i);
    int ans=0;
    do{
        int sum=0;
        REP(i,n){
            REP(j,i){
                sum+=d[j][i];
            }
        }
        ans=max(ans,sum);
    }while(next_permutation(all(vec)));
    cout<<ans<<endl;
    return 0;
}