#include<bits/stdc++.h>
using namespace std;
typedef long long int ll;
typedef long double ld;
#define f first
#define s second
const int N = 2e5 + 100;
const ll mod = 998244353;
const ll inf = 1e9 + 100;
ll dp[3][N], par[N];
vector<pair<int, int>> adj[N];
int n;
void dfs(int u)
{
dp[1][u] = 0;
for(auto it : adj[u])
{
int x = it.f, w = it.s;
if(x != par[u])
{
par[x] = u;
dfs(x);
dp[1][u] += min(dp[1][x] + w, dp[2][x]);
}
}
dp[2][u] = inf;
for(auto it : adj[u])
{
int x = it.f, w = it.s;
if(x != par[u])
{
ll mn = min(dp[1][x] + w, dp[2][x]);
dp[2][u] = min(dp[2][u], dp[1][u] - mn + dp[1][x]);
}
}
//cout << u << ' ' << dp[1][u] << ' ' << dp[2][u] << endl;
}
inline void cl()
{
for(int i = 0; i < n; i++)
par[i] = i;
}
int main()
{
ios_base::sync_with_stdio(false), cin.tie(0), cout.tie(0);
cin >> n;
ll sum = 0;
for(int i = 0; i < n-1; i++)
{
int x, y, w;
cin >> x >> y >> w;
x--; y--;
adj[x].push_back({y, w});
adj[y].push_back({x, w});
sum += w;
}
ll mn = inf;
for(int i = 0; i < n; i++)
{
cl();
dfs(i);
mn = min(mn, dp[1][i]);
}
cout << sum - mn << endl;
return 0;
}
