제출 #334889

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
334889		talant117408	Birthday gift (IZhO18_treearray)	C++17	100 / 100	2423 ms	60396 KiB

treearray

/*
    Code written by Talant I.D.
*/
#include <bits/stdc++.h>
//#include <ext/pb_ds/assoc_container.hpp>

//using namespace __gnu_pbds;
using namespace std;

//typedef tree <int, null_type, less<int>, rb_tree_tag, tree_order_statistics_node_update> indexed_set;
typedef long long ll;
typedef pair <int, int> pii;
typedef pair <ll, ll> pll;
  
#define precision(n) fixed << setprecision(n)
#define pb push_back
#define ub upper_bound
#define lb lower_bound
#define mp make_pair
#define eps (double)1e-9
#define PI 2*acos(0.0)
#define endl "\n"
#define sz(v) int((v).size())
#define all(v) v.begin(),v.end()
#define rall(v) v.rbegin(),v.rend()
#define do_not_disturb ios::sync_with_stdio(0);cin.tie(0);cout.tie(0);
#define OK cout << "OK" << endl;
  
inline bool isvowel(char ch){
    ch = tolower(ch);
    return (ch == 'a' || ch == 'e' || ch == 'i' || ch == 'o' || ch == 'u');
}
  
inline bool isprime(int n){
    if(n < 2 || (n%2 == 0 && n != 2)) return false;
    for(int i = 3; i*i <= n; i++)
        if(n%i == 0) return false;
    return true;
}
 
class Union{
    private:
        vector <int> saizu, link;
    public:
        Union(int n){
            saizu.assign(n, 1); link.resize(n); 
            iota(all(link), 0);
        }
        int find(int n){
            if(link[n] == n) return n;
            return link[n] = find(link[n]);
        }
        int same(int a, int b){
            return find(a) == find(b);
        }
        void unite(int a, int b){
            if(same(a, b)) return;
             
            a = find(a); b = find(b);
            if(saizu[a] < saizu[b]) swap(a, b);
             
            saizu[a] += saizu[b];
            link[b] = a;
        }
        int getsize(int a){
            return saizu[find(a)];
        }
};
 
const int mod = 1e9+7;
 
ll mode(ll a){
    a %= mod;
    if(a < 0) a += mod;
    return a;
}
 
ll subt(ll a, ll b){
    return mode(mode(a)-mode(b));
}
 
ll add(ll a, ll b){
    return mode(mode(a)+mode(b));
}
 
ll mult(ll a, ll b){
    return mode(mode(a)*mode(b));
}
 
ll binpow(ll a, ll b){
    ll res = 1;
    while(b){
        if(b&1) res = mult(res, a);
        a = mult(a, a);
        b >>= 1;
    }
    return res;
}

const int N = 2e5+7;
vector <vector <int>> graph(N);
set <pii> st, t;
int tree[N*4], vec[N], tin[N], tout[N], timer, up[N][20];

void dfs(int v, int p = 1){
    tin[v] = ++timer;
    up[v][0] = p;
    for(int i = 1; i < 20; i++) up[v][i] = up[up[v][i-1]][i-1];
    
    for(auto to : graph[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(!upper(up[a][i], b)) a = up[a][i];
    }
    return up[a][0];
}

int main(){
   // do_not_disturb
    
    int n, m, q;
    cin >> n >> m >> q;
    for(int i = 0; i < n-1; i++){
        int x, y;
        cin >> x >> y;
        graph[x].pb(y);
        graph[y].pb(x);
    }
    
    dfs(1);
    
    for(int i = 1; i <= m; i++){
        cin >> vec[i];
    }
    for(int i = 1; i <= m; i++){
        t.insert(mp(vec[i], i));
        if(i < m) st.insert(mp(lca(vec[i], vec[i+1]), i));
    }
    
    while(q--){
        int type;
        cin >> type;
        if(type == 1){
            int pos, x;
            cin >> pos >> x;
            t.erase(mp(vec[pos], pos));
            if(pos > 1) st.erase(mp(lca(vec[pos], vec[pos-1]), pos-1));
            if(pos < m) st.erase(mp(lca(vec[pos], vec[pos+1]), pos));
            vec[pos] = x;
            t.insert(mp(vec[pos], pos));
            if(pos > 1) st.insert(mp(lca(vec[pos], vec[pos-1]), pos-1));
            if(pos < m) st.insert(mp(lca(vec[pos], vec[pos+1]), pos));
        }
        else{
            int l, r, x;
            cin >> l >> r >> x;
            auto to = t.lb(mp(x, l));
            if(to != t.end() && to -> first == x && to -> second <= r){
                cout << (*to).second << ' ' << (*to).second << endl;
            }
            else{
                auto it = st.lb(mp(x, l));
                if(it != st.end() && it -> first == x && it -> second < r){
                    cout << (*it).second << ' ' << (*it).second+1 << endl;
                }
                else{
                    cout << "-1 -1" << endl;
                }
            }
        }
    }
    
    return 0;
}

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