Submission #484010

#	Time	Username	Problem	Language	Result	Execution time	Memory
484010		urosk	Birthday gift (IZhO18_treearray)	C++14	56 / 100	1033 ms	112284 KiB

treearray

//https://oj.uz/problem/view/IZhO18_treearray
// __builtin_popcount(x) broj bitova
// __builtin_popcountll(x) long long
#include "bits/stdc++.h"
#include <ext/pb_ds/tree_policy.hpp>
#include <ext/pb_ds/assoc_container.hpp>
#define ld double
#define ll long long
#define ull unsigned long long
#define llinf 100000000000000000LL // 10^17
#define iinf 2000000000 // 2*10^9
#define pb push_back
#define popb pop_back
#define fi first
#define sc second
#define endl '\n'
#define pii pair<int,int>
#define pll pair<ll,ll>
#define pld pair<ld,ld>
#define sz(a) int(a.size())
#define all(a) a.begin(),a.end()
#define rall(a) a.begin(),a.end(),greater<int>()
#define getunique(v) {sort(all(v)); v.erase(unique(all(v)), v.end());}
#define pi 3.14159265358979323846
#define here cerr<<"---------------------------\n"
#define ceri(a,l,r) {for(ll i = l;i<=r;i++) cerr<<a[i]<< " ";cerr<<endl;}
#define yes cout<<"YES"<<endl
#define no cout<<"NO"<<endl
using namespace std;
using namespace __gnu_pbds;

typedef tree<int,null_type,less<int>,rb_tree_tag,tree_order_statistics_node_update> ordered_set;

void setIO(string inoutname)
{
	freopen((inoutname+".in").c_str(),"r",stdin);
    	freopen((inoutname+".out").c_str(),"w",stdout);
}
#define mod 1
ll gcd(ll a, ll b)
{
   if(b==0) return a;
   if(a==0) return b;
   if(a>=b)  return gcd(a%b,b);
   return  gcd(a,b%a);
}
ll lcm(ll a,ll b){
   return (a/gcd(a,b))*b;
}
ll add(ll a,ll b){
	a+=b;
	a+=mod;
	if(a>=mod) a%=mod;
	return a;
}
ll mul(ll a,ll b){return(a*b)%mod;}
#define maxn 200005
#define lg 25
ll n,m,q;
vector<ll> g[maxn];
set<ll> v[maxn];
set<ll> w[maxn];
ll a[maxn];
ll b[maxn];
ll in[maxn];
ll out[maxn];
ll st[maxn][lg];
ll ti = 1;
void dfs(ll u,ll par){
    st[u][0] = par;
    in[u] = ti;
    ti++;
    for(ll s : g[u]){
        if(s==par) continue;
        dfs(s,u);
    }
    out[u] = ti;
    ti++;
}
bool in_t(ll v,ll u){return in[u]<=in[v]&&out[u]>=out[v];}
void init(){
    for(ll j = 1;j<lg;j++){
        for(ll i = 1;i<=n;i++) st[i][j] = st[st[i][j-1]][j-1];
    }
}
ll lca(ll u,ll v){
    if(in_t(v,u)) return u;
    if(in_t(u,v)) return v;
    for(ll j = lg-1;j>=0;j--){
        if(!in_t(v,st[u][j])) u = st[u][j];
    }
    return st[u][0];
}
void tc(){
	ios_base::sync_with_stdio(false);cerr.tie(0);cout.tie(0);cin.tie(0);
    cin >> n >> m >> q;
    for(ll i = 1;i<=n-1;i++){
        ll x,y; cin >> x >> y;
        g[x].pb(y);
        g[y].pb(x);
    }
    for(ll i = 1;i<=m;i++) cin >> a[i];
    dfs(1,1);
    init();
    for(ll i = 1;i<=m-1;i++){
        w[a[i]].insert(i);
        b[i] = lca(a[i],a[i+1]);
        v[b[i]].insert(i);
    }
    w[a[m]].insert(m);
    while(q--){
        ll tip;
        cin >> tip;
        if(tip==1){
            ll i,x; cin >> i >> x;
            w[a[i]].erase(w[a[i]].find(i));
            a[i] = x;
            w[a[i]].insert(i);
            if(i>1){
                v[b[i-1]].erase(v[b[i-1]].find(i-1));
                b[i-1] = lca(a[i-1],a[i]);
                v[b[i-1]].insert(i-1);
            }
            if(i<n){
                v[b[i]].erase(v[b[i]].find(i));
                b[i] = lca(a[i],a[i+1]);
                v[b[i]].insert(i);
            }
        }else{
            ll l,r,x;
            cin >> l >> r >> x;
            auto it = v[x].lower_bound(l);
            if(it!=v[x].end()&&*it<r){
                cout<<*it<< " "<<*it+1<<endl;
            }else if(!w[x].empty()){
                auto j = w[x].lower_bound(l);
                if(j!=w[x].end()&&*j<=r) cout<<*j<< " "<<*j<<endl;
                else cout<<-1<< " "<<-1<<endl;
            }else cout<<-1<< " "<<-1<<endl;
        }
    }
}
int main(){
	ios_base::sync_with_stdio(false);cerr.tie(0);cout.tie(0);cin.tie(0);
	//setIO("lol");
	int t; t = 1;
	while(t--){
		tc();
	}
	return 0;
}
/*
5 4 4
1 2
3 1
3 4
5 3
4 5 2 3
2 1 3 1
1 3 5
2 3 4 5
2 1 3 1
*/

Compilation message (stderr)

treearray.cpp: In function 'void setIO(std::string)':
treearray.cpp:36:9: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   36 |  freopen((inoutname+".in").c_str(),"r",stdin);
      |  ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
treearray.cpp:37:13: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   37 |      freopen((inoutname+".out").c_str(),"w",stdout);
      |      ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 12 / 12
• Subtask 2: 18 / 18
• Subtask 3: 26 / 26
• Subtask 4: 0 / 44