题目
题解:
#include<bits/stdc++.h>
using namespace std;
const int maxn = 1e5 + 5;
int trie[maxn][26];//trie[i][j]表示编号为i的结点 的代表字母j的子结点
int tot;//字典树结点个数
int fail[maxn];//fail[i]指向 根结点到结点i组成的字符串的最大后缀 的结点,如
/* 0
/ \
1(s) 4(h)
/ \
2(h) 5(e)
/
3(e)
3指向5,2指向4
*/
void get_fail(){//bfs更新fail数组
queue<int> q;
for(int i = 0; i < 26; i++){
if(trie[0][i]){
fail[trie[0][i]] = 0;//第二层结点fail指向0,入队
q.push(trie[0][i]);
}
}
while(!q.empty()){
int u = q.front();
q.pop();
for(int i = 0; i < 26; i++){
int v = trie[u][i];//子结点
if(v){//子结点不为空
int t = fail[u];
fail[v] = trie[t][i];//fail指向 父结点fail指向的结点 的子结点
q.push(v);
}
else{
int t = fail[u];
trie[u][i] = trie[t][i];//改变字典树,让u fail指向的结点 的子结点 成为u的子结点(即在u结点失配时,可以移动到失配指针指向的结点的下一个结点,继续匹配)
}
}
}
}
int t[maxn];
int n;
int lowbit(int x){return x & -x;}
void add(int x, int k){
for(int i = x; i <= n; i += lowbit(i)){
t[i] += k;
}
}
int ask(int x){
int res = 0;
for(int i = x; i; i -= lowbit(i)){
res += t[i];
}
return res;
}
void solve(){
cin >> n;
for(int i = 0; i <= n; i++){//从0开始!!!
t[i] = 0;
fail[i] = 0;
for(int j = 0; j < 26; j++){
trie[i][j] = 0;
}
}
for(int i = 1; i < n; i++){
int j;
cin >> j;
j--;
char ch;
cin >> ch;
trie[j][ch - 'a'] = i;
}
get_fail();
vector<int> L(n + 1), R(n + 1);
vector<vector<int>> G(n + 1);
for(int i = 1; i < n; i++){
G[fail[i]].push_back(i);
// cout << i << ' ' << fail[i] << '\n';
}
int tot = 0;
auto dfs = [&](auto self, int u) -> void {
L[u] = ++tot;
for(auto v : G[u]){
self(self, v);
}
R[u] = tot;
};
dfs(dfs, 0);
int m;
cin >> m;
for(int i = 1; i <= m; i++){
int op, k, x;
cin >> op;
if(op == 1){
cin >> k;
int l = n, r = 1;
vector<pair<int, int>> vec;
for(int j = 1; j <= k; j++){
cin >> x;
x--;
// if(x == 0) continue;
vec.push_back({L[x], R[x]});
}
sort(vec.begin(), vec.end());
for(int i = 0; i < vec.size(); ){
add(vec[i].first, 1);
add(vec[i].second + 1, -1);
int j = i + 1;
while(j < vec.size() && vec[j].second <= vec[i].second){
j++;
}
i = j;
}
}
else{
cin >> x;
x--;
cout << ask(L[x]) << '\n';
}
}
}
int main(){
ios::sync_with_stdio(0);
cin.tie(0);
int T = 1;
cin >> T;
while(T--){
solve();
}
return 0;
}