Submission #865219

#	Time	Username	Problem	Language	Result	Execution time	Memory
865219		vjudge1	Birthday gift (IZhO18_treearray)	C++17	0 / 100	1 ms	6744 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], pr[maxn], cl[maxn];
vector <int> g[maxn];

void dfs(int v, int p) {
	pr[v] = p;
	for (auto to: g[v]) {
		if (to != p) {
			dfs(to, v);
		}
	} 
}

void fnd(int v, int p) {
	if (cl[v] == 0) {
		cl[v] = 2;
	}
	for (auto to: g[v]) {
		if (to != p) {
			fnd(to, v);
		}
	} 
}

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;
			for (int i = 1; i <= m; i++) {
				cl[i] = 0;
			}
			cl[u] = 1;
			for (auto to: g[u]) {
				if (to != pr[u]) {
					cl[to] = 1;
					fnd(to, u);
				}
			}
			bool ok = 0, ok2 = 0;
			int x = l, y = l, nx = INF, ny = -INF;
			for (int i = l; i <= r; i++) {
				
				if (cl[a[i]] == 2) {
					y = i;
					ok2 = 1;
				}
				if (cl[a[i]] == 1) {
					y = i;
					ok = 1;
				}
				if (cl[a[i]] == 0) {
					ok = 0;
					ok2 = 0;
					x = i + 1;
					y = x;
				}
				if (ny - nx + 1 < y - x + 1 && ok == 1 && ok2 == 1) {
					nx = x;
					ny = y;
				}
			}
			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