제출 #771065

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
771065		khshg	늑대인간 (IOI18_werewolf)	C++14	15 / 100	4021 ms	38080 KiB

werewolf

#include "werewolf.h"
#include<bits/stdc++.h>
using namespace std;

int N;
vector<vector<int>> adj;
vector<int> D;
vector<pair<int, int>> ch;

void init(int N) {
	D = vector<int>(N); iota(begin(D), end(D), 0);
	ch.resize(N);
}

int parent(int x) {
	return (D[x] == x ? x : D[x] = parent(D[x]));
}

void unite(int x, int y) {
	x = parent(x); y = parent(y);
	if(x == y) return;
	int s = (int)D.size();
	D[x] = D[y] = s;
	D.push_back(s);
	ch.emplace_back(x, y);
}

void dfs(int S, int& tim3) {
	if(S < N) {
		ch[S] = {tim3, tim3};
		++tim3;
		return;
	}
	int x, y;
	tie(x, y) = ch[S];
	dfs(x, tim3); dfs(y, tim3);
	ch[S].first = min(ch[x].first, ch[y].first);
	ch[S].second = max(ch[x].second, ch[y].second);
}
 
vector<int> check_validity(int _N, vector<int> X, vector<int> Y, vector<int> S, vector<int> E, vector<int> L, vector<int> R) {
	N = _N;
	adj.resize(N);
	int M = (int)X.size();
	for(int i = 0; i < M; ++i) {
		adj[X[i]].push_back(Y[i]);
		adj[Y[i]].push_back(X[i]);
	}
	int Q = (int)L.size();
	vector<pair<int, int>> RL(Q), RR(Q), pos(N);
	{
		vector<int> sind(Q);
		iota(begin(sind), end(sind), 0);
		sort(begin(sind), end(sind), [&](const int& i, const int& j) { return L[i] > L[j]; });
		init(N);
		vector<int> par(Q);
		int i = N - 1;
		for(int j = 0; j < Q; ++j) {
			for(; i >= L[sind[j]]; --i) {
				for(auto& u : adj[i]) {
					if(u >= i) unite(u, i);
				}
			}
			par[sind[j]] = parent(S[sind[j]]);
		}
		for(; i >= 0; --i) {
			for(auto& u : adj[i]) {
				if(u >= i) unite(u, i);
			}
		}
		int tim3 = 0; dfs((int)D.size() - 1, tim3);
		for(int i = 0; i < Q; ++i) {
			RL[i] = ch[par[i]];
		}
		for(int i = 0; i < N; ++i) {
			pos[i].first = ch[i].first;
		}
	}
	{
		vector<int> sind(Q);
		iota(begin(sind), end(sind), 0);
		sort(begin(sind), end(sind), [&](const int& i, const int& j) { return R[i] < R[j]; });
		init(N);
		vector<int> par(Q);
		int i = 0;
		for(int j = 0; j < Q; ++j) {
			for(; i <= R[sind[j]]; ++i) {
				for(auto& u : adj[i]) {
					if(u <= i) unite(u, i);
				}
			}
			par[sind[j]] = parent(E[sind[j]]);
		}
		for(; i < N; ++i) {
			for(auto& u : adj[i]) {
				if(u <= i) unite(u, i);
			}
		}
		int tim3 = 0; dfs((int)D.size() - 1, tim3);
		for(int i = 0; i < Q; ++i) {
			RR[i] = ch[par[i]];
		}
		for(int i = 0; i < N; ++i) {
			pos[i].second = ch[i].first;
		}
	}
	vector<int> ans(Q);
	for(int i = 0; i < Q; ++i) {
		for(auto& u : pos) {
			if(RL[i].first <= u.first && u.first <= RL[i].second && RR[i].first <= u.second && u.second <= RR[i].second) {
				ans[i] = 1;
				break;
			}
		}
	}
	return ans;
}

• Subtask 1: 7 / 7
• Subtask 2: 8 / 8
• Subtask 3: 0 / 34
• Subtask 4: 0 / 51