#include <bits/stdc++.h>
#include <iostream>
#include <vector>
#include <algorithm>
#include <numeric>
#include <cstdlib>
#include <cmath>
#include <queue>
#include <stack>
#include <deque>
#include <fstream>
#include <iterator>
#include <set>
#include <map>
#include <unordered_map>
#include <iomanip>
#include <cctype>
#include <string>
#include <cassert>
#include <set>
#include <bitset>
#include <unordered_set>
#include <numeric>
#define all(a) a.begin(), a.end()
#define fast ios_base::sync_with_stdio(false);cin.tie(NULL);cout.tie(NULL);
#define pb push_back
#define ppi pair<int,pair<int,int>>
#define int int64_t
using namespace std;
// /\_/\
// (= ._.)
// / > \>
// encouraging cat
const int INF = 10000000000000000;
//const int mod = 1000000007;
const int mod = 998244353;
const int MAXN = 200005;
//ifstream fin('xor.in');
//ofstream fout('xor.out');
signed main()
{
int n,m;
cin >> n >> m;
vector<vector<pair<int,int>>> adj(n);
for (int i = 0;i < m;i++)
{
int u,v, w;
cin >> u >> v >> w;
u--,v--;
adj[u].pb({v,w});
adj[v].pb({u, w});
}
int res = 0;
for (int i = 0;i < n;i++)
{
int c = 0;
for (auto edge: adj[i])
{
c += edge.second;
}
res = max(res, c);
}
cout << res << '\n';
return 0;
}
