#include <algorithm>
#include <bitset>
#include <cassert>
#include <chrono>
#include <complex>
#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <ctime>
#include <deque>
#include <functional>
#include <iomanip>
#include <iostream>
#include <iterator>
#include <limits>
#include <list>
#include <map>
#include <numeric>
#include <queue>
#include <random>
#include <ratio>
#include <set>
#include <sstream>
#include <stack>
#include <string>
#include <unordered_map>
#include <unordered_set>
#include <utility>
#include <vector>
#include <climits>
#define ll long long
#define ld long double
#define mp make_pair
#define pb push_back
#define in insert
#define vll vector<ll>
#define endl "\n"
#define pll pair<ll,ll>
#define f first
#define s second
#define FOR(i,a,b) for(int i=(a),_b=(b); i<=_b; i++)
#define int ll
#define sz(x) (ll)x.size()
#define all(x) (x.begin(),x.end())
using namespace std;
const ll INF = 1e12;
const ll N =(2e5+5); // TODO : change value as per problem
const ll MOD = 1e9+7;
ll up[N][19];
ll n,m,q;
vll adj[N];
ll a[N];
int k;
set<int> wow[N];
set<int> pt[N];
int timer;
vector<int> tin, tout;
void dfs(int v, int p)
{
tin[v] = ++timer;
up[v][0] = p;
for (int i = 1; i <= k; ++i)
up[v][i] = up[up[v][i-1]][i-1];
for (int u : adj[v]) {
if (u != p)
dfs(u, v);
}
tout[v] = ++timer;
}
bool is_ancestor(int u, int v)
{
return tin[u] <= tin[v] && tout[u] >= tout[v];
}
int lca(int u, int v)
{
if (is_ancestor(u, v))
return u;
if (is_ancestor(v, u))
return v;
for (int i = k; i >= 0; --i) {
if (!is_ancestor(up[u][i], v))
u = up[u][i];
}
return up[u][0];
}
void preprocess(int root) {
tin.resize(n+1);
tout.resize(n+1);
timer = 0;
k = 19;
dfs(root, root);
}
void solve(){
cin >> n >> m >> q;
for(int i = 2;i <= n;i++){
ll u,v;
cin >> u >> v;
adj[u].pb(v);
adj[v].pb(u);
}
for(int i =1;i<=m;i++) cin >> a[i],pt[a[i]].in(i);
preprocess(1);
for(int i = 1;i <= m-1;i++){
ll u = lca(a[i],a[i+1]);
wow[u].in(i);
}
while(q--){
ll t;
cin >> t;
if(t == 1){
ll pos,v;
cin >> pos >> v;
// ll old = lca(a[pos],a[pos-1]);
// ll old2 = lca(a[pos],a[pos+1]);
pt[a[pos]].erase(pt[a[pos]].find(pos));
if(pos != 1){
ll old = lca(a[pos],a[pos-1]);
wow[old].erase(wow[old].find(pos-1));
}
if(pos != m){
ll old = lca(a[pos],a[pos+1]);
wow[old].erase(wow[old].find(pos));
}
a[pos] = v;
if(pos != 1){
ll ne = lca(a[pos],a[pos-1]);
wow[ne].in(pos-1);
}
if(pos != m){
ll ne = lca(a[pos],a[pos+1]);
wow[ne].in(pos);
}
pt[a[pos]].in(pos);
}
else{
ll l,r,v;
cin >> l >> r >> v;
bool yay = false;
auto it = pt[v].lower_bound(l);
if(it != pt[v].end()){
// cout << "HERE " << l << ' ' << r << endl;
ll nd = *it;
if(nd <= r){
cout << nd << " " << nd << endl;
yay = true;
}
}
if(yay) continue;
it = wow[v].lower_bound(l);
if(it != wow[v].end()){
int nd = *it;
if((nd + 1) <= r){
cout << nd << " " << nd+1 << endl;
yay = true;
}
}
if(!yay)
cout << "-1 -1\n";
}
}
}
signed main(){
ios_base::sync_with_stdio(0);
cin.tie(NULL);
// freopen(".in","r",stdin);freopen(".out","w",stdout);
ll tt=1;
// cin >> tt;
while(tt--){
solve();
}
}
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
18 ms |
23808 KB |
n=5 |
| 2 |
Runtime error |
42 ms |
48248 KB |
Execution killed with signal 11 (could be triggered by violating memory limits) |
| 3 |
Halted |
0 ms |
0 KB |
- |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
18 ms |
23808 KB |
n=5 |
| 2 |
Runtime error |
42 ms |
48248 KB |
Execution killed with signal 11 (could be triggered by violating memory limits) |
| 3 |
Halted |
0 ms |
0 KB |
- |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
18 ms |
23808 KB |
n=5 |
| 2 |
Runtime error |
42 ms |
48248 KB |
Execution killed with signal 11 (could be triggered by violating memory limits) |
| 3 |
Halted |
0 ms |
0 KB |
- |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
18 ms |
23808 KB |
n=5 |
| 2 |
Runtime error |
42 ms |
48248 KB |
Execution killed with signal 11 (could be triggered by violating memory limits) |
| 3 |
Halted |
0 ms |
0 KB |
- |
