#include <bits/stdc++.h>
using namespace std;
#define pb push_back
#define ff first
#define ss second
#define all(x) x.begin(),x.end()
#define rall(x) x.rbegin(),x.rend()
#define int long long
template <class F, class _S>
bool chmin(F &u, const _S &v){
bool flag = false;
if ( u > v ){
u = v; flag |= true;
}
return flag;
}
template <class F, class _S>
bool chmax(F &u, const _S &v){
bool flag = false;
if ( u < v ){
u = v; flag |= true;
}
return flag;
}
const int N = (1<<18) +1, inf = 1e18+200;
//int mod = 998244353;
//int mod = 1000000007;
//mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
//#define rnd(l, r) uniform_int_distribution <int> (l, r)(rng)
void solve(){
int n, m, q;
cin >> n >> m >> q;
vector<vector<int>> g(n+1);
for(int i = 1; i < n; i++){
int u, v;
cin >> u >> v;
g[u].pb(v);
g[v].pb(u);
}
vector<int> tin(n+1), tout(n+1);
vector<vector<int>> ln(22, vector<int> (n+1, 1));
int timer = 0;
auto dfs = [&](auto dfs, int ps, int pr) -> void{
ln[0][ps] = pr;
tin[ps] = timer++;
for(int i = 1; i < 20; i++)
ln[i][ps] = ln[i-1][ln[i-1][ps]];
for(int to:g[ps]){
if(to == pr)continue;
dfs(dfs, to, ps);
}
tout[ps] = timer++;
};
dfs(dfs, 1, 1);
auto lca = [&](int a, int b) -> int {
if(tin[b] <= tin[a] && tout[a] <= tout[b])return b;
if(tin[a] <= tin[b] && tout[b] <= tout[a])return a;
for(int i = 19; i >= 0; i--){
int na = ln[i][a];
if(tin[na] <= tin[b] && tout[b] <= tout[na])continue;
a = na;
}
return ln[0][a];
};
vector<multiset<int>> st(n+1);
vector<multiset<int>> sv(n+1);
vector<int> a(m+1);
for(int i = 1; i <= m; i++){
cin >> a[i];
st[a[i]].insert(i);
if(i > 1)sv[lca(a[i], a[i-1])].insert(i);
}
while(q--){
int ty;
cin >> ty;
if(ty == 1){
int ps, va;
cin >> ps >> va;
st[a[ps]].erase(st[a[ps]].find(ps));
if(ps > 1){
int x = lca(a[ps], a[ps-1]);
sv[x].erase(sv[x].find(ps));
}
if(ps < m){
int x = lca(a[ps] , a[ps+1]);
sv[x].erase(sv[x].find(ps+1));
}
a[ps] = va;
st[va].insert(ps);
if(ps > 1){
int x = lca(a[ps], a[ps-1]);
sv[x].insert(ps);
}
if(ps < m){
int x = lca(a[ps] , a[ps+1]);
sv[x].insert(ps+1);
}
}else{
int l, r, v;
cin >> l >> r >> v;
auto x = st[v].lower_bound(l);
if(l <= *x && *x <= r){
cout << *x << ' ' << *x << '\n';
continue;
}
auto y = sv[v].lower_bound(l);
if(l <= *y && *y <= r){
cout << *y-1 << ' ' << *y << '\n';
continue;
}
cout << -1 << ' ' << -1 << '\n';
}
}
}
signed main(){
ios_base::sync_with_stdio(false);
cin.tie(nullptr);
cout.tie(nullptr);
int tt = 1;
//cin >> tt;
while(tt--){
solve();
}
}
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
0 ms |
348 KB |
n=5 |
| 2 |
Incorrect |
1 ms |
348 KB |
Wrong output format. |
| 3 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
0 ms |
348 KB |
n=5 |
| 2 |
Incorrect |
1 ms |
348 KB |
Wrong output format. |
| 3 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
0 ms |
348 KB |
n=5 |
| 2 |
Incorrect |
1 ms |
348 KB |
Wrong output format. |
| 3 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
0 ms |
348 KB |
n=5 |
| 2 |
Incorrect |
1 ms |
348 KB |
Wrong output format. |
| 3 |
Halted |
0 ms |
0 KB |
- |
