#include <bits/stdc++.h>
using namespace std;
const int N = 1000;
vector<int> g[N];
int T = 0;
vector<int> l;
int dfs(int v, int p = -1) {
l[v] = T++;
int mx = l[v];
for (int u : g[v]) {
if (u != p) mx = max(mx, dfs(u, v));
}
l[v] *= N;
l[v] += mx;
return mx;
}
vector<int> label(int n, int k, vector<int> u, vector<int> v) {
for (int i = 0; i < n; i++) g[i].clear();
for (int i = 0; i < n - 1; i++) {
g[u[i]].push_back(v[i]);
g[v[i]].push_back(u[i]);
}
l.resize(n);
T = 0;
dfs(0);
//for (int &i : l) assert(i >= 0 && i <= k);
return l;
}
int find_next_station(int s, int t, vector<int> c) {
int p;
for (int v : c) {
if (v / N <= s / N && s / N <= v % N) p = v; else {
if (v / N <= t / N && t / N <= v % N) return v;
}
}
return p;
}
#ifdef LOCAL
static int max_label = 0;
static int r, n, k, q;
static std::vector<int> u, v, labels, answers;
static std::map<int, int> reverse_labels;
static std::vector<std::vector<int>> adjlist;
static int s, t, w;
static std::vector<int> c;
int main() {
assert(scanf("%d", &r) == 1);
for (int tc = 0; tc < r; tc++) {
assert(scanf("%d%d", &n, &k) == 2);
u.resize(n - 1);
v.resize(n - 1);
adjlist.clear();
adjlist.resize(n);
for (int i = 0; i < n - 1; i++) {
assert(scanf("%d%d", &u[i], &v[i]) == 2);
adjlist[u[i]].push_back(v[i]);
adjlist[v[i]].push_back(u[i]);
}
labels = label(n, k, u, v);
if ((int)labels.size() != n) {
printf("Number of labels not equal to %d\n", n);
exit(0);
}
reverse_labels.clear();
for (int i = 0; i < n; i++) {
if (labels[i] < 0 || labels[i] > k) {
printf("Label not in range 0 to %d\n", k);
exit(0);
}
if (reverse_labels.find(labels[i]) != reverse_labels.end()) {
printf("Labels not unique\n");
exit(0);
}
reverse_labels[labels[i]] = i;
if (labels[i] > max_label) {
max_label = labels[i];
}
}
assert(scanf("%d", &q) == 1);
for (int i = 0; i < q; i++) {
assert(scanf("%d%d%d", &s, &t, &w) == 3);
c.clear();
for (int v : adjlist[s]) {
c.push_back(labels[v]);
}
std::sort(c.begin(), c.end());
int answer = find_next_station(labels[s], labels[t], c);
if (!std::binary_search(c.begin(), c.end(), answer)) {
printf("Label %d returned by find_next_station not found in c\n", answer);
exit(0);
}
answers.push_back(reverse_labels[answer]);
}
}
printf("%d\n", max_label);
for (int index : answers) {
printf("%d\n", index);
}
exit(0);
}
#endif
