제출 #526448

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
526448		Mr_Husanboy	Birthday gift (IZhO18_treearray)	C++14	0 / 100	33 ms	47956 KiB

treearray

// Muallif: Mansuraliyev Husanboy Murotali o'g'li  >> NamPS

#include<bits/stdc++.h>

using namespace std;
#define ll long long
#define ios ios_base::sync_with_stdio(false); cin.tie(NULL); cout.tie(NULL)
#define all(a) a.begin(), a.end()
#define F first
#define S second
// 0-9 >> 48-57;    A-Z>>65-90   and   a-z>>97-122 respectively;
const int N=2e5+5;
vector<int> g[N]; int up[N][20],depth[N];
set<int> pos[N],pospair[N];
void dfs(int a, int p){
	for(auto u:g[a]){
		if(u!=p){
			up[u][0]=a;
			for(int i=1;i<20;i++){
				up[u][i]=up[up[u][i-1]][i-1];
			}
			depth[u]=depth[a]+1;
			dfs(u,a);
		}
	}
}

int lca(int a, int b){
	if(depth[a]<depth[b]){
		swap(a,b);
	}
	int k=depth[a]-depth[b];
	for(int i=0;i<20;i++){
		if((1<<i)&k){
			a=up[a][i];
		}
	}
	if(a==b) return a;
	for(int i=19;i>=0;i--){
		if(up[a][i]!=up[b][i]){
			a=up[a][i],b=up[b][i];
		}
	}
	return up[a][0];
}




void solve(){
	int n,m,q; cin>>n>>m>>q;
	for(int i=0;i<n-1;i++){
		int x,y; cin>>x>>y; g[x].push_back(y); g[y].push_back(x);
	}
	dfs(1,1);
//	for(int i=1;i<=n;i++) cout<<depth[i]<<endl;
	int a[n+1];
	for(int i=1;i<=m;i++){
		cin>>a[i]; pos[a[i]].insert(i);
	}
	for(int i=1;i<m;i++){
		pospair[lca(a[i],a[i+1])].insert(i);
	}
/*	int aa,bb; cin>>aa>>bb;
	cout<<lca(aa,bb)<<" lca"<<endl;*/
	while(q--){
		int type; cin>>type;
		if(type==1){
			int x,y; cin>>x>>y;
			pos[a[x]].erase(x);
			pos[y].insert(x);
			if(x>1){
				pospair[lca(a[x-1],a[x])].erase(x-1);
				pospair[lca(a[x-1],y)].insert(x-1);
			}
			if(x<m){
				pospair[lca(a[x],a[x+1])].erase(x);
				pospair[lca(y,a[x+1])].insert(x);
			}
			a[x]=y;
		}else{
			int l,r,x; cin>>l>>r>>x;
			auto pp=pospair[x].lower_bound(l);
		/*	for(int i=1;i<=n;i++){
				cout<<i<<": ";
				for(auto u:pospair[i]){
					cout<<u<<' ';
				}cout<<endl;
			}*/
			auto p=pos[x].lower_bound(l);
			if(p!=pos[x].end()&&*p<=r){
				cout<<*p<<' '<<*p<<"\n";
			}else
			if(pp!=pospair[x].end()&&*pp<r){
				cout<<*pp<<' '<<*pp+1<<"\n";
			}else cout<<"-1 -1\n";
			
		}
	}
}


int main(){
	ios; 
	//int t=1;   cin>>t; while(t--)
	solve();
}
/*
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
*/

• Subtask 1: 0 / 12
• Subtask 2: 0 / 18
• Subtask 3: 0 / 26
• Subtask 4: 0 / 44