#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using ld = long double;
using T = tuple<ll, ll, ll>;
#define int long long
#define Base 41
#define sz(a) (int)a.size()
#define FOR(i, a, b) for ( int i = a ; i <= b ; i++ )
#define FORD(i, a, b) for (int i = b; i >= a; i --)
#define REP(i, n) for (int i = 0; i < n; ++i)
#define REPD(i, n) for (int i = n - 1; i >= 0; --i)
#define all(x) x.begin() , x.end()
#define pii pair<int , int>
#define fi first
#define se second
#define Lg(x) 31 - __builtin_clz(x)
#define MASK(i) (1LL << (i))
#define BIT(x, i) (((x) >> (i)) & 1)
constexpr ll LINF = (1ll << 60);
constexpr int INF = (1ll << 30);
constexpr int MAX = 2e5 + 5;
constexpr int Mod = 1e9 + 7;
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
void setupIO(){
#define name "Whisper"
//Phu Trong from Nguyen Tat Thanh High School for gifted student
srand(time(NULL));
cin.tie(nullptr)->sync_with_stdio(false); cout.tie(nullptr);
//freopen(name".inp", "r", stdin);
//freopen(name".out", "w", stdout);
cout << fixed << setprecision(10);
}
template <class X, class Y>
bool minimize(X &x, const Y &y){
X eps = 1e-9;
if (x > y + eps) {x = y; return 1;}
return 0;
}
template <class X, class Y>
bool maximize(X &x, const Y &y){
X eps = 1e-9;
if (x + eps < y) {x = y; return 1;}
return 0;
}
int N, M, Q;
int a[MAX];
vector<int> adj[MAX];
int up[MAX][21], dep[MAX];
void dfs(int u, int p){
for (auto&v : adj[u]) if(v ^ p){
up[v][0] = u; dep[v] = dep[u] + 1;
for (int i = 1; i <= 20; ++i){
up[u][i] = up[up[u][i - 1]][i - 1];
}
dfs(v, u);
}
}
int lca(int u, int v){
if (dep[u] < dep[v]) swap(u, v); int dis = dep[u] - dep[v];
for (int i = 0; MASK(i) <= dis; ++i){
if (BIT(dis, i)) u = up[u][i];
}
if (u == v) return u;
int k = Lg(dep[v]);
for (int i = k; i >= 0; --i) if(up[u][i] != up[v][i]){
u = up[u][i], v = up[v][i];
}
return up[u][0];
}
set<int> posLca[MAX], posVer[MAX];
void Whisper(){
cin >> N >> M >> Q;
for (int i = 1; i < N; ++i){
int u, v; cin >> u >> v;
adj[u].push_back(v);
adj[v].push_back(u);
}
for (int i = 1; i <= M; ++i) cin >> a[i];
dfs(1, 0);
for (int i = 1; i <= M; ++i){
posVer[a[i]].insert(i);
if (i > 1){
int p = lca(a[i], a[i - 1]);
posLca[p].insert(i);
}
}
for (int i = 1; i <= Q; ++i){
int cmd; cin >> cmd;
if(cmd == 2){
int l, r, p; cin >> l >> r >> p;
if (posVer[p].size()){
auto L = posVer[p].lower_bound(l);
if (L != posVer[p].end() && *L <= r){
cout << *L << " " << *L << '\n';
continue;
}
}
if(posLca[p].size()){
auto L = posLca[p].lower_bound(l + 1);
if (L != posLca[p].end() && *L <= r){
cout << (*L) - 1 << " " << *L << '\n';
continue;
}
}
cout << "-1 -1\n";
}
else{
int p, v; cin >> p >> v;
posVer[a[p]].erase(p);
if (p > 1) posLca[lca(a[p], a[p - 1])].erase(p);
if (p < M) posLca[lca(a[p], a[p + 1])].erase(p + 1);
a[p] = v;
posVer[a[p]].insert(p);
if (p > 1) posLca[lca(a[p], a[p - 1])].insert(p);
if (p < M) posLca[lca(a[p], a[p + 1])].insert(p + 1);
}
}
}
signed main(){
setupIO();
int Test = 1;
// cin >> Test;
for ( int i = 1 ; i <= Test ; i++ ){
Whisper();
if (i < Test) cout << '\n';
}
}
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
8 ms |
27480 KB |
n=5 |
| 2 |
Incorrect |
8 ms |
27480 KB |
Wrong range. |
| 3 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
8 ms |
27480 KB |
n=5 |
| 2 |
Incorrect |
8 ms |
27480 KB |
Wrong range. |
| 3 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
8 ms |
27480 KB |
n=5 |
| 2 |
Incorrect |
8 ms |
27480 KB |
Wrong range. |
| 3 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
8 ms |
27480 KB |
n=5 |
| 2 |
Incorrect |
8 ms |
27480 KB |
Wrong range. |
| 3 |
Halted |
0 ms |
0 KB |
- |
