// we all are lost trying to be someone.
#include <bits/stdc++.h>
#define fastio ios_base::sync_with_studio(0); cin.tie(0);
#define sz(x) ll(x.size())
#define all(x) x.begin(),x.end()
#define rall(x) x.rbegin(),x.rend()
#define pb push_back
#define ss second
#define ff first
using namespace std;
typedef long long ll;
typedef long double ld;
typedef pair<ll,ll> ii;
const int MAX=1e6;
const int inf=1e9;
const int mod=1e9+7;
vector<ii> gfo[MAX];
ll A[MAX];
void solve(){
ll n, m, u, v, w;
cin>>n>>m;
for(ll i=0; i<m; i++){
cin>>u>>v>>w;
A[u]+=w;
A[v]+=w;
gfo[u].pb({v,w});
gfo[v].pb({u,w});
}
ll a=*max_element(A,A+n+1);
cout<<a<<endl;
return;
}
int main(){
solve();
return 0;
}
