이 제출은 이전 버전의 oj.uz에서 채점하였습니다. 현재는 제출 당시와는 다른 서버에서 채점을 하기 때문에, 다시 제출하면 결과가 달라질 수도 있습니다.
#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define pll pair<ll,ll>
#define pii pair<int,int>
#define fs first
#define sc second
#define io ios::sync_with_stdio(0);cin.tie(0);cout.tie(0);
#define ld long double
#define _all(T) T.begin(),T.end()
const int mxn = 2e5+10;
vector<int> paths[mxn];
int fa[mxn],link_top[mxn],bs[mxn],sz[mxn],dep[mxn],arr[mxn],adj[mxn];
int segtree[mxn*4+4];
void dfs1(int now,int par){
fa[now] = par;
sz[now] = 1;
for(auto nxt:paths[now]){
if(nxt == par)continue;
dep[nxt] = dep[now]+1;
dfs1(nxt,now);
if(bs[now] == 0||sz[bs[now]] < sz[nxt])bs[now] = nxt;
sz[now] += sz[nxt];
}
return;
}
void dfs2(int now,int top){
link_top[now] = top;
if(bs[now])dfs2(bs[now],top);
for(auto nxt:paths[now]){
if(nxt == fa[now]||nxt == bs[now])continue;
dfs2(nxt,nxt);
}
return;
}
int lca(int a,int b){
int ta = link_top[a],tb = link_top[b];
while(ta != tb){
if(dep[ta]<dep[tb]){
swap(ta,tb);
swap(a,b);
}
a = fa[ta];
ta = link_top[a];
}
if(dep[a]>dep[b])return b;
else return a;
}
void modify(int now,int l,int r,int p,int v){
if(l == r){
segtree[now] = v;
return;
}
int mid = (l+r)>>1;
if(mid>=p)modify(now*2+1,l,mid,p,v);
else modify(now*2+2,mid+1,r,p,v);
segtree[now] = min(segtree[now*2+1],segtree[now*2+2]);
return;
}
int getval(int now,int l,int r,int s,int e){
if(s<=l&&e>=r)return segtree[now];
int mid = (l+r)>>1;
if(mid>=e)return getval(now*2+1,l,mid,s,e);
else if(mid<s)return getval(now*2+2,mid+1,r,s,e);
else return min(getval(now*2+1,l,mid,s,e),getval(now*2+2,mid+1,r,s,e));
}
bool flag = false;
int main(){
io
int n,m,q;
cin>>n>>m>>q;
// if(m*m*q*__lg(n)>=1e9)return 0;
for(int i = 0;i<n-1;i++){
int a,b;
cin>>a>>b;
paths[a].push_back(b);
paths[b].push_back(a);
}
dfs1(1,1);
dfs2(1,1);
for(int i = 1;i<=m;i++){
cin>>arr[i];
}
for(int i = 2;i<=m;i++){
adj[i] = lca(arr[i],arr[i-1]);
modify(0,0,mxn,i,dep[adj[i]]);
}
// cout<<dep[lca(arr[1],arr[2])]<<' '<<getval(0,0,mxn,2,2);return 0;
while(q--){
int t;
cin>>t;
if(t == 1){
int p,v;
cin>>p>>v;
arr[p] = v;
if(p != 1)adj[p] = lca(arr[p],arr[p-1]);
if(p != m)adj[p+1] = lca(arr[p],arr[p+1]);
if(p != 1)modify(0,0,mxn,p,dep[adj[p]]);
if(p != m)modify(0,0,mxn,p+1,dep[adj[p+1]]);
}
else{
int a,b,c;
pii ans = {-1,-1};
cin>>a>>b>>c;
if(a == 1&&b == 3&&c == 1)flag = true;
for(int i = a;i<b;i++){
int l = i+1,r = b;
while(l < r){
int mid= (l+r)>>1;
// if(flag)cout<<l<<' '<<r<<' '<<getval(0,0,mxn,i+1,mid)<<endl;
if(getval(0,0,mxn,i+1,mid)<=dep[c])r = mid;
else l = mid+1;
}
if(getval(0,0,mxn,i+1,r) == dep[c]&&lca(arr[i],c) == c){
ans = {i,r};
}
if(arr[i] == c)ans = {i,i};
}
if(arr[b] == c)ans = {b,b};
flag = false;
cout<<ans.fs<<' '<<ans.sc<<'\n';
}
}
return 0;
}
/*
5 4 4
1 2
3 1
3 4
5 3
4 5 2 3
2 1 3 1
1 3 5
2 3 4 5
2 1 3 1
*/
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