This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
#include <bits/stdc++.h>
#define ios ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0)
#define file(s) if (fopen(s".in", "r")) freopen(s".in", "r", stdin), freopen(s".out", "w", stdout)
#define all(a) a.begin() , a.end()
#define F first
#define S second
using namespace std;
using ll = long long;
const int N = 2e5+5 , inf = 2e9 + 7;
const ll INF = 1e18 , mod = 1e9+7 , P = 6547;
int a[N];
vector<int> g[N];
int tin[N] , tout[N] , timer;
int up[N][20];
void dfs(int v = 1, int p = 0) {
up[v][0] = p;
for(int i = 1; i < 20; i ++) {
up[v][i] = up[up[v][i-1]][i-1];
}
tin[v] = ++timer;
for(auto to: g[v]) {
if(to != p) {
dfs(to , v);
}
}
tout[v] = ++timer;
}
bool upper(int a , int b) {
return tin[a] <= tin[b] && tout[a] >= tout[b];
}
int lca(int a , int b) {
if(upper(a , b)) return a;
if(upper(b , a)) return b;
for(int i = 19; i >= 0; i --) {
if(up[a][i] && !upper(up[a][i] , b)) {
a = up[a][i];
}
}
return up[a][0];
}
void solve(int tc) {
int n , m , q;
cin >> n >> m >> q;
for(int i = 1; i < n; i ++) {
int a , b;
cin >> a >> b;
g[a].push_back(b);
g[b].push_back(a);
}
dfs();
for(int i = 1; i <= m; i ++) {
cin >> a[i];
}
while(q --) {
int t;
cin >> t;
if(t == 2) {
int l , r , v;
cin >> l >> r >> v;
int fnd = 0;
for(int i = l; i < r; i ++) {
if(lca(a[i] , a[i+1]) == v) {
cout << i << ' ' << i+1 << '\n';
fnd = 1;
break;
}
}
if(fnd == 0) {
for(int i = l; i <= r; i ++) {
if(a[i] == v) {
fnd = 1;
cout << i << ' ' << i << '\n';
break;
}
}
}
if(!fnd) {
cout << "-1 -1\n";
continue;
}
}
else {
int pos , val;
cin >> pos >> val;
a[pos] = val;
}
}
}
/*
*/
main() {
ios;
int tt = 1 , tc = 0;
// cin >> tt;
while(tt --) {
solve(++tc);
}
return 0;
}
Compilation message (stderr)
treearray.cpp:104:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
104 | main() {
| ^~~~
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