#define _CRT_SECURE_NO_WARNINGS
#include <vector>
#include<iostream>
#include<cstring>
const int inf = 1e9;
using namespace std;
#define SUBMIT 1
void initialize(int N, std::vector<int> A, std::vector<int> B);
int cat(int v);
int dog(int v);
int neighbor(int v);
#ifndef SUBMIT
#include <cstdio>
#include <cassert>
#include <vector>
#include <stdlib.h>
int readInt() {
int i;
if (scanf("%d", &i) != 1) {
fprintf(stderr, "Error while reading input\n");
exit(1);
}
return i;
}
int main() {
int N = readInt();
std::vector<int> A(N - 1), B(N - 1);
for (int i = 0; i < N - 1; i++)
{
A[i] = readInt();
B[i] = readInt();
}
int Q;
assert(scanf("%d", &Q) == 1);
std::vector <int> T(Q), V(Q);
for (int i = 0; i < Q; i++)
{
T[i] = readInt();
V[i] = readInt();
}
initialize(N, A, B);
std::vector<int> res(Q);
for (int j = 0; j < Q; j++)
{
if (T[j] == 1) res[j] = cat(V[j]);
else if (T[j] == 2) res[j] = dog(V[j]);
else res[j] = neighbor(V[j]);
}
for (int j = 0; j < Q; j++)
printf("%d\n", res[j]);
return 0;
}
#endif
vector<int> g[200005];
int dp[200005][3], cur[200005];
int n;
int dfs(int node, int par, int b) {
if (dp[node][b] != -1) return dp[node][b];
int op1 = inf, op2 = 0, op3 = 0;
if (b != 0) op1 = dfs(node, par, 0) + 1;
if ((cur[node] == b) || (cur[node] == 0) || (b == 0)) {
for (auto& x : g[node])
if (x != par)
op2 += dfs(x, node, 1),
op3 += dfs(x, node, 2);
}
else op2 = op3 = inf;
if ((b == 1) || (cur[node] == 1)) op3 = inf;
if ((b == 2) || (cur[node] == 2)) op2 = inf;
return dp[node][b] = min(op1, min(op2, op3));
}
void initialize(int N, vector<int> a, vector<int> b) {
n = N, memset(dp, -1, sizeof(dp));
for (int i = 0; i < (n - 1); ++i)
g[a[i]].push_back(b[i]),
g[b[i]].push_back(a[i]);
}
int cat(int v) {
memset(dp, -1, sizeof(dp));
cur[v] = 1;
return dfs(1, 0, 0);
}
int dog(int v) {
memset(dp, -1, sizeof(dp));
cur[v] = 2;
return dfs(1, 0, 0);
}
int neighbor(int v) {
memset(dp, -1, sizeof(dp));
cur[v] = 0;
return dfs(1, 0, 0);
}
