Submission #725418

#	Time	Username	Problem	Language	Result	Execution time	Memory
725418		SanguineChameleon	Game (APIO22_game)	C++17	60 / 100	4064 ms	45496 KiB

game

#pragma GCC optimize("Ofast,unroll-loops")
#pragma GCC target("avx2,popcnt,lzcnt,abm,bmi,bmi2,fma")
 
#include "game.h"
#include <bits/stdc++.h>
using namespace std;
 
const int shift = 9;
const int maxN = 3e5 + 20;
int L[maxN];
int R[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;
	for (int i = 0; i < k; i++) {
		L[i] = i;
		R[i] = i + 1;
	}
	for (int i = k; i < n; i++) {
		L[i] = 0;
		R[i] = k + 1;
	}
}
 
void update_L(int u, int val);
 
void update_R(int u, int val);
 
void update_L(int u, int val) {
	if (done) {
		return;
	}
	bool diff = (L[u] >> shift) != (val >> shift);
	bool same = (L[u] >> shift) == (R[u] >> shift);
	L[u] = val;
	if (L[u] >= R[u]) {
		done = true;
		return;
	}
	if (diff) {
		for (auto v: adj1[u]) {
			if (L[u] > L[v]) {
				update_L(v, L[u]);
			}
		}
	}
	else if (same) {
		for (auto v: adj1[u]) {
			if (L[u] > L[v]) {
				update_L(v, L[u]);
			}
		}
		for (auto v: adj2[u]) {
			if (R[u] < R[v]) {
				update_R(v, R[u]);
			}
		}
	}
}
 
void update_R(int u, int val) {
	if (done) {
		return;
	}
	bool diff = (R[u] >> shift) != (val >> shift);
	bool same = (L[u] >> shift) == (R[u] >> shift);
	R[u] = val;
	if (L[u] >= R[u]) {
		done = true;
		return;
	}
	if (diff) {
		for (auto v: adj2[u]) {
			if (R[u] < R[v]) {
				update_R(v, R[u]);
			}
		}
	}
	else if (same) {
		for (auto v: adj1[u]) {
			if (L[u] > L[v]) {
				update_L(v, L[u]);
			}
		}
		for (auto v: adj2[u]) {
			if (R[u] < R[v]) {
				update_R(v, R[u]);
			}
		}
	}
}
 
int add_teleporter(int u, int v) {
	int val = max(L[u], (u < k ? u + 1 : 0));
	if (val > L[v]) {
		update_L(v, val);
	}
	if (R[v] < R[u]) {
		update_R(u, R[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