이 제출은 이전 버전의 oj.uz에서 채점하였습니다. 현재는 제출 당시와는 다른 서버에서 채점을 하기 때문에, 다시 제출하면 결과가 달라질 수도 있습니다.
#include <iostream>
#include <cstdio>
#include <cmath>
#include <algorithm>
#include <set>
#include <vector>
using namespace std;
const int maxn=2e5+5, Log=18;
int n, m, q;
vector < int > ms[maxn];
int parent[maxn][Log];
int dep[maxn];
void dfs(int x, int prosl, int d){
parent[x][0]=prosl;
dep[x]=d;
for(int i=0; i<(int)ms[x].size(); i++){
if(ms[x][i]!=prosl){
dfs(ms[x][i], x, d+1);
}
}
}
void precompute(){
for(int i=1; i<Log; i++){
for(int j=0; j<n; j++){
parent[j][i]=parent[parent[j][i-1]][i-1];
}
}
}
void digni(int &a, int &b){
int raz=dep[a]-dep[b];
for(int i=0; i<Log; i++){
if((1<<i)&raz){
a=parent[a][i];
}
}
}
int lca(int a, int b){
if(dep[a]<dep[b]){
swap(a, b);
}
digni(a, b);
if(a==b){
return a;
}
for(int i=Log-1; i>-1; i--){
if(parent[a][i]!=parent[b][i]){
a=parent[a][i];
b=parent[b][i];
}
}
return parent[a][0];
}
int l[maxn];
set < pair < int, int > > s;
set < pair < int, int > > s1;
int main(){
ios_base::sync_with_stdio(false);
cin.tie(0);
cout.tie(0);
cin >> n >> m >> q;
int a, b;
for(int i=0; i<n-1; i++){
cin >> a >> b;
a--;
b--;
ms[a].push_back(b);
ms[b].push_back(a);
}
dfs(0, 0, 0);
precompute();
for(int i=0; i<m; i++){
cin >> l[i];
l[i]--;
s1.insert({l[i], i});
if(i){
s.insert({lca(l[i-1], l[i]), i-1});
}
}
int c, d;
set < pair < int, int > >::iterator it;
for(int i=0; i<q; i++){
cin >> a;
if(a==1){
cin >> b >> c;
b--;
c--;
s1.erase({l[b], b});
s1.insert({c, b});
if(b){
s.erase({lca(l[b-1], l[b]), b-1});
s.insert({lca(l[b-1], c), b-1});
}
if(b!=m-1){
s.erase({lca(l[b], l[b+1]), b});
s.insert({lca(c, l[b+1]), b});
}
l[b]=c;
}
else{
cin >> b >> c >> d;
d--;
b--;
c--;
it=s.lower_bound({d, b});
if(it!=s.end() && it->first==d && it->second<c){
cout << it->second+1 << ' ' << it->second+2 << '\n';
}
else{
it=s1.lower_bound({d, b});
if(it!=s1.end() && it->first==d && it->second<=c){
cout << it->second+1 << ' ' << it->second+1 << '\n';
}
else{
cout << -1 << ' ' << -1 << '\n';
}
}
}
}
return 0;
}
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