Submission #725359

#	Time	Username	Problem	Language	Result	Execution time	Memory
725359		SanguineChameleon	Game (APIO22_game)	C++17	60 / 100	1098 ms	17628 KiB

game

#include "game.h"
#include <bits/stdc++.h>
using namespace std;
 
const int maxN = 3e5 + 20;
int block;
int max_in[maxN];
int min_out[maxN];
vector<int> adj1[maxN];
vector<int> adj2[maxN];
bool done = false;
int n, k;
 
void init(int _n, int _k) {
	n = _n;
	k = _k;
	if (n > 30000) {
		block = sqrt(k);
	}
	else {
		block = 1;
	}
	for (int i = 0; i < k; i++) {
		max_in[i] = (i - 1) / block;
		min_out[i] = i / block;
	}
	for (int i = k; i < n; i++) {
		max_in[i] = -1 / block;
		min_out[i] = k / block;
	}
}
 
void update_in(int u, int val) {
	if (done) {
		return;
	}
	if (val <= max_in[u]) {
		return;
	}
	max_in[u] = val;
	if (max_in[u] >= min_out[u]) {
		done = true;
		return;
	}
	for (auto v: adj1[u]) {
		update_in(v, val);
	}
}
 
void update_out(int u, int val) {
	if (done) {
		return;
	}
	if (val >= min_out[u]) {
		return;
	}
	min_out[u] = val;
	if (max_in[u] >= min_out[u]) {
		done = true;
		return;
	}
	for (auto v: adj2[u]) {
		update_out(v, val);
	}
}
 
int add_teleporter(int u, int v) {
	update_in(v, max(max_in[u], (u < k ? u : -1) / block));
	update_out(u, min_out[v]);
	adj1[u].push_back(v);
	adj2[v].push_back(u);
	return done;
}

• Subtask 1: 2 / 2
• Subtask 2: 10 / 10
• Subtask 3: 18 / 18
• Subtask 4: 30 / 30
• Subtask 5: 0 / 40