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>
using namespace std;
#define ar array
#define fr first
#define sc second
#define vec vector
#define ret return
#define ins insert
#define mk make_pair
#define pb push_back
#define pf push_front
#define pob pop_back
#define pof pop_front
#define int long long
#define pii pair<int,int>
#define all(s) s.begin(), s.end()
#define allr(s) s.rbegin(), s.rend()
#define NeedForSpeed ios::sync_with_stdio(0),cin.tie(0);
#define ordered_set tree<int, null_type,less<int>, rb_tree_tag,tree_order_statistics_node_update>
const int N=1e6+12,INF=1e9,mod = 1e9+7;
bool iswowel(char n){ n = toupper(n); if(n == 'A' || n == 'O' || n == 'U' || n == 'E' || n == 'I') return true; else return false;}
int n,m,k,x,y,l,ll,r,o,ans,res,timer,ok,mx,mn = INF;
int a[N], tin[N], tout[N];
vec<int>g[N];
int up[N][30];
set<int>s[N], ss[N];
void dfs(int v, int pred){
tin[v] = ++timer;
up[v][0] = pred;
for(int i=1; i<=22; i++)
up[v][i] = up[up[v][i-1]][i-1];
for(int to : g[v]){
if(to != pred){
dfs(to, v);
}
}
tout[v] = ++timer;
}
bool upper(int a, int b){
ret tin[a] <= tin[b] && tout[b] <= tout[a];
}
int lca(int a, int b){
if(upper(a, b))ret a;
if(upper(b, a))ret b;
for(int i=22; i>=0; i--){
if(!upper(up[a][i], b))
a = up[a][i];
}
ret up[a][0];
}
map<int, int>mp;
main(){
NeedForSpeed
cin>>m>>n>>o;
m--;
while(m--){
cin>>x>>y;
g[x].pb(y);
g[y].pb(x);
}
dfs(1,1);
for(int i=1; i<=n; i++){
cin>>a[i];
ss[a[i]].ins(i);
}
for(int i=1; i<=n; i++)
s[lca(a[i], a[i+1])].ins(i);
while(o--){
cin>>ok;
if(ok == 1){
cin>>l>>r;
ss[a[l]].erase(l);
s[lca(a[l], a[l+1])].erase(l);
s[lca(a[l-1], a[l])].erase(l-1);
a[l] = r;
ss[a[l]].ins(l);
if(l < n)s[lca(a[l], a[l+1])].ins(l);
if(1 < l)s[lca(a[l-1], a[l])].ins(l-1);
}
else{
ans = -1, res = -1;
cin>>l>>r>>x;
auto it = ss[x].lower_bound(l);
if(it != ss[x].end() && *it <= r)ans = *it, res = *it;
it = s[x].lower_bound(l);
if(it != s[x].end() && *it < r)ans = *it, res = *it+1;
cout<<ans<<" "<<res<<endl;
}
}
return 0;
}
Compilation message (stderr)
treearray.cpp:63:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
63 | main(){
| ^~~~
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