제출 #865467

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
865467		vjudge1	Birthday gift (IZhO18_treearray)	C++17	0 / 100	2 ms	8796 KiB

treearray

//Bismillahir-Rahmanir-Rahim
#include <bits/stdc++.h>
         
using namespace std;
      
#define flash ios_base::sync_with_stdio(0),cin.tie(0)
#define pb push_back
#define ll long long
#define ld long double
#define dbg(x) cerr << #x << " = " << x << "\n";
#define ff first
#define ss second
 
 /*     
#pragma GCC target ("avx2")
#pragma GCC optimization ("O3")
#pragma comment (linker, "/stack:200000000")
#pragma GCC optimize("Ofast")
#pragma GCC target ("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,tune=native")
*/ 
 
const long long INF = 1e9 + 7;
const long long MOD = 1e9 + 7;
const int maxn = 2e5 + 10;
const int lg = 22;

int n, m, q, a[maxn], upp[maxn][lg + 1], tin[maxn], tout[maxn], timer;
vector <int> g[maxn];

void dfs(int v, int p) {
	upp[v][0] = p;
	tin[v] = ++timer;
	for (int i = 1; i <= lg; i++) {
		upp[v][i] = upp[upp[v][i - 1]][i - 1];
	}
	for (auto to: g[v]) {
		if (to != p) {
			dfs(to, v);
		}
	} 
	tout[v] = timer;
}

bool check(int a, int b) {
	if (tin[a] <= tin[b] && tout[a] >= tout[b]) {
		return 1;
	}
	return 0;
}

void press_F_() {
	cin >> n >> m >> q;
	for (int i = 1; i < n; i++) {
		int x, y;
		cin >> x >> y;
		g[x].pb(y);
		g[y].pb(x);
	}
	for (int i = 1; i <= m; i++) {
		cin >> a[i];
	}
	dfs(1, 0);
	while(q--) {
		int tp;
		cin >> tp;
		if (tp == 1) {
			int pos, v;
			cin >> pos >> v;
			a[pos] = v;
		} else {
			int l, r, u;
			cin >> l >> r >> u;
			int x = l, nx = INF, ny = -INF, lca;
			lca = a[l];
			for (int i = l; i <= r; i++) {
				if (a[i] == u) {
					if (ny - nx + 1 < i - i + 1) {
						ny = i;
						nx = i;
					}
				}
				if (check(a[i], lca)) {
					lca = a[i];
					if (lca == u) {
						if (ny - nx + 1 < i - x + 1) {
							nx = x;
							ny = i;
						}
					}
					if (!check(u, lca)) {
						x = i;
						lca = a[i]; 
					}
					continue;
				}
				if (check(a[i], lca)) {
					if (lca == u) {
						if (ny - nx + 1 < i - x + 1) {
							nx = x;
							ny = i;
						}
					}
					if (!check(u, lca)) {
						lca = a[i];
						x = i;
					}
					continue;
				}
				int cur = a[i];
				for (int j = lg; j >= 0; j--) {
					if (!check(upp[cur][j], lca) && upp[cur][j] != 0) {
						cur = upp[cur][j];
					}
				}
				if (upp[cur][0] == u) {
					if (ny - nx + 1 < i - x + 1) {
						nx = x;
						ny = i;
					}
					lca = upp[cur][0];
				}
				if (!check(u, lca)) {
					lca = a[i];
					x = i;
				}
			}
			if (nx == INF && ny == -INF) {
				nx = -1;
				ny = -1;
			}
			cout << nx << " " << ny << '\n';
		}
	}
} 

/*
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
*/
int main() {
    flash;
    // srand(time(0));
    int T = 1;
    // cin >> T;
    for (int i = 1; i <= T; i++) {
        // cout << "Case" << " " << i << ':' << "\n";
        press_F_();
    }
    //Respa gold 2023-2024 InshAllah
    return 0;
}
/*
Maybe not today and tomorrow, but InshAllah one day I will reach expert
*/
// g++ -std=c++17 main.cpp
// ./a.out

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