oj.uz

답안 #771213

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
771213 2023-07-02T16:00:59 Z khshg 늑대인간 (IOI18_werewolf) C++14
100 / 100
 452 ms 86360 KB 
#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);
}

void merg3(vector<int>& es, const vector<int>& a, const vector<int>& b) {
	es.resize((int)a.size() + (int)b.size());
	int i = 0, j = 0;
	while(true) {
		if(i < (int)a.size() && j < (int)b.size()) {
			if(a[i] < b[j]) {
				es[i + j] = a[i];
				++i;
			} else {
				es[i + j] = b[j];
				++j;
			}
		} else if(i < (int)a.size()) {
			es[i + j] = a[i];
			++i;
		} else if(j < (int)b.size()) {
			es[i + j] = b[j];
			++j;
		} else break;
	}
}

vector<vector<int>> st;
int base;

void build(vector<pair<int, int>>& pos) {
	sort(begin(pos), end(pos));
	base = 1;
	while(base < N) {
		base *= 2;
	}
	st.resize(base * 2);
	for(int i = 0; i < N; ++i) {
		st[i + base].push_back(pos[i].second);
	}
	for(int i = base - 1; i >= 1; --i) {
		merg3(st[i], st[2 * i], st[2 * i + 1]);
	}
}

bool chck(int s, int l, int r) {
	auto it = lower_bound(begin(st[s]), end(st[s]), l);
	return (it != end(st[s]) && (*it) <= r);
}

bool query(int xl, int xr, int yl, int yr) {
	xl += base;
	xr += base;
	while(xl <= xr) {
		if(xl & 1) {
			if(chck(xl, yl, yr)) return 1;
			++xl;
		}
		if(!(xr & 1)) {
			if(chck(xr, yl, yr)) return 1;
			--xr;
		}
		xl /= 2;
		xr /= 2;
	}
	return 0;
}
 
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);
	build(pos);
	for(int i = 0; i < Q; ++i) {
		ans[i] = query(RL[i].first, RL[i].second, RR[i].first, RR[i].second);
	}
	return ans;
}

Subtask #1
7.0 / 7.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 300 KB Output is correct
5 Correct 1 ms 300 KB Output is correct
6 Correct 1 ms 296 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 1 ms 300 KB Output is correct

Subtask #2
8.0 / 8.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 300 KB Output is correct
5 Correct 1 ms 300 KB Output is correct
6 Correct 1 ms 296 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 1 ms 300 KB Output is correct
10 Correct 4 ms 1364 KB Output is correct
11 Correct 5 ms 1336 KB Output is correct
12 Correct 4 ms 1364 KB Output is correct
13 Correct 4 ms 1460 KB Output is correct
14 Correct 4 ms 1500 KB Output is correct
15 Correct 5 ms 1396 KB Output is correct

Subtask #3
34.0 / 34.0

# 결과 실행 시간 메모리 Grader output
1 Correct 344 ms 74312 KB Output is correct
2 Correct 279 ms 80476 KB Output is correct
3 Correct 278 ms 77588 KB Output is correct
4 Correct 288 ms 76160 KB Output is correct
5 Correct 310 ms 76088 KB Output is correct
6 Correct 333 ms 75868 KB Output is correct
7 Correct 289 ms 75776 KB Output is correct
8 Correct 278 ms 80456 KB Output is correct
9 Correct 242 ms 77448 KB Output is correct
10 Correct 302 ms 76044 KB Output is correct
11 Correct 304 ms 76040 KB Output is correct
12 Correct 273 ms 75816 KB Output is correct
13 Correct 321 ms 80552 KB Output is correct
14 Correct 326 ms 80536 KB Output is correct
15 Correct 356 ms 80552 KB Output is correct
16 Correct 343 ms 80496 KB Output is correct
17 Correct 322 ms 75724 KB Output is correct

Subtask #4
51.0 / 51.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 300 KB Output is correct
5 Correct 1 ms 300 KB Output is correct
6 Correct 1 ms 296 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 1 ms 300 KB Output is correct
10 Correct 4 ms 1364 KB Output is correct
11 Correct 5 ms 1336 KB Output is correct
12 Correct 4 ms 1364 KB Output is correct
13 Correct 4 ms 1460 KB Output is correct
14 Correct 4 ms 1500 KB Output is correct
15 Correct 5 ms 1396 KB Output is correct
16 Correct 344 ms 74312 KB Output is correct
17 Correct 279 ms 80476 KB Output is correct
18 Correct 278 ms 77588 KB Output is correct
19 Correct 288 ms 76160 KB Output is correct
20 Correct 310 ms 76088 KB Output is correct
21 Correct 333 ms 75868 KB Output is correct
22 Correct 289 ms 75776 KB Output is correct
23 Correct 278 ms 80456 KB Output is correct
24 Correct 242 ms 77448 KB Output is correct
25 Correct 302 ms 76044 KB Output is correct
26 Correct 304 ms 76040 KB Output is correct
27 Correct 273 ms 75816 KB Output is correct
28 Correct 321 ms 80552 KB Output is correct
29 Correct 326 ms 80536 KB Output is correct
30 Correct 356 ms 80552 KB Output is correct
31 Correct 343 ms 80496 KB Output is correct
32 Correct 322 ms 75724 KB Output is correct
33 Correct 452 ms 77196 KB Output is correct
34 Correct 186 ms 35628 KB Output is correct
35 Correct 452 ms 80600 KB Output is correct
36 Correct 389 ms 76680 KB Output is correct
37 Correct 422 ms 79836 KB Output is correct
38 Correct 418 ms 77248 KB Output is correct
39 Correct 317 ms 85408 KB Output is correct
40 Correct 401 ms 85532 KB Output is correct
41 Correct 408 ms 79156 KB Output is correct
42 Correct 344 ms 76608 KB Output is correct
43 Correct 383 ms 84180 KB Output is correct
44 Correct 385 ms 79580 KB Output is correct
45 Correct 328 ms 85800 KB Output is correct
46 Correct 284 ms 85588 KB Output is correct
47 Correct 343 ms 80844 KB Output is correct
48 Correct 317 ms 80540 KB Output is correct
49 Correct 321 ms 80716 KB Output is correct
50 Correct 343 ms 80536 KB Output is correct
51 Correct 414 ms 86360 KB Output is correct
52 Correct 385 ms 86356 KB Output is correct