#include <cstdio>
#include <algorithm>
#include <map>
#include <utility>
#include <vector>
using namespace std;
typedef long long ll;
typedef pair<int, int> pii;
constexpr int MAXN = 100'005;

vector<pii> g[MAXN];

namespace lca
{
int timer = 0, tin[MAXN], tout[MAXN];
ll dist[MAXN];
constexpr int LOGMAXN = 18;
int up[MAXN][LOGMAXN];
void dfs(int n, int p)
{
	tin[n] = timer++;
	up[n][0] = p;
	for (int i = 1; i < LOGMAXN; i++)
		up[n][i] = up[up[n][i - 1]][i - 1];
	for (const auto &[a, w] : g[n])
		if (a != p)
		{
			dist[a] = dist[n] + w;
			dfs(a, n);
		}
	tout[n] = timer++;
}
void init()
{
	dist[1] = 0;
	dfs(1, 1);
}
bool is_ancestor(int u, int v)
{
	return tin[u] <= tin[v] && tout[u] >= tout[v];
}
int lca(int u, int v)
{
	if (is_ancestor(u, v))
		return u;
	if (is_ancestor(v, u))
		return v;
	for (int i = LOGMAXN - 1; i >= 0; i--)
		if (!is_ancestor(up[u][i], v))
			u = up[u][i];
	return up[u][0];
}
ll getdist(int u, int v)
{
	return dist[u] + dist[v] - 2 * dist[lca(u, v)];
}
}    // namespace lca

namespace centroid
{
int treesize[MAXN];
bool used[MAXN];
pair<int, ll> up[MAXN];
void dfs(int n, int p)
{
	treesize[n] = 1;
	for (const auto &[a, _] : g[n])
		if (a != p && !used[a])
		{
			dfs(a, n);
			treesize[n] += treesize[a];
		}
}
int centroid(int n, int p, int sz)
{
	for (const auto &[a, _] : g[n])
		if (a != p && !used[a] && treesize[a] > sz / 2)
			return centroid(a, n, sz);
	return n;
}
void decomposition(int n, int p)
{
	dfs(n, n);
	int c = centroid(n, n, treesize[n]);
	up[c] = {p, p == -1 ? 1e15 : lca::getdist(c, p)};
	used[c] = true;
	for (const auto &[a, _] : g[n])
		if (!used[a])
			decomposition(a, c);
}
void init()
{
	decomposition(1, -1);
}
}    // namespace centroid

struct FenwickTree
{
	vector<int> tree;
	void init(int n)
	{
		tree.assign(n + 1, 0);
	}
	void update(int p, int a)
	{
		p++;
		while (p < tree.size())
		{
			tree[p] += a;
			p += p & (-p);
		}
	}
	int query(int p)
	{
		int s = 0;
		p++;
		while (p > 0)
		{
			s += tree[p];
			p -= p & (-p);
		}
		return s;
	}
};

struct Qnode
{
	map<ll, int> comp;
	FenwickTree ft;
	void addquery(ll l, ll r)
	{
		comp[l] = 0;
		comp[r + 1] = 0;
	}
	void init()
	{
		int c = 0;
		for (auto &[_, v] : comp)
			v = c++;
		ft.init(c);
	}
	void update(ll l, ll r)
	{
		ft.update(comp[l], 1);
		ft.update(comp[r + 1], -1);
	}
	int query(ll dist)
	{
		if (comp.size() == 0)
			return 0;
		auto u = comp.upper_bound(dist);
		if (u == comp.begin())
			return 0;
		u--;
		return ft.query(u->second);
	}
};

Qnode qnodes[MAXN];

int main()
{
	int N;
	scanf("%d", &N);
	vector<pii> roads(N);
	for (int i = 0, u, v, w; i < N - 1; i++)
	{
		scanf("%d %d %d", &u, &v, &w);
		g[u].push_back({v, w});
		g[v].push_back({u, w});
		roads[i] = {u, v};
	}

	lca::init();
	centroid::init();

	printf("0\n");
	return 0;

	int Q;
	scanf("%d", &Q);
	vector<pii> queries(Q);
	for (int i = 0, a, b; i < Q; i++)
	{
		char t[2];
		scanf("%s %d", t, &a);
		b = -1;
		if (t[0] == '+')
			scanf("%d", &b);
		queries[i] = {a, b};

		if (t[0] == '+')
		{
			ll radius = b;
			for (int cn = a; cn != -1 && radius > 0;)
			{
				const auto [u, d] = centroid::up[cn];
				qnodes[cn].addquery(max(0ll, radius - 2 * d + 1), radius);
				cn = u;
				radius -= d;
			}
		}
	}

	for (int i = 1; i <= N; i++)
		qnodes[i].init();

	for (const auto &[a, b] : queries)
		if (b == -1)
		{
			const auto [u, v] = roads[a - 1];
			int start = lca::is_ancestor(u, v) ? v : u;
			ll dist = 0;
			int ans = 0;
			for (int cn = start; cn != -1;)
			{
				const auto [u, d] = centroid::up[cn];
				ans += qnodes[cn].query(dist);
				dist += d;
				cn = u;
			}
			printf("%d\n", ans);
		}
		else
		{
			ll radius = b;
			for (int cn = a; cn != -1 && radius > 0;)
			{
				const auto [u, d] = centroid::up[cn];
				qnodes[cn].update(max(0ll, radius - 2 * d + 1), radius);
				radius -= d;
				cn = u;
			}
		}

	return 0;
}