Submission #987658

#	Time	Username	Problem	Language	Result	Execution time	Memory
987658		CSQ31	Game (APIO22_game)	C++17	100 / 100	2527 ms	88020 KiB

game

#include "game.h"
#include <bits/stdc++.h>
using namespace std;
#define pb push_back
#define fi first
#define se second
#define sz(a) (int)(a.size())
int n,k;
const int MAXN = 3e5+1;
vector<int>g[MAXN],gr[MAXN];
int L[MAXN],R[MAXN];
void init(int N, int K)
{
	n=N;
	k=K;
	for(int i=0;i<k;i++)L[i] = R[i] = i;
	for(int i=k;i<n;i++){
		L[i] = -1;
		R[i] = k;
	}
}
bool add(int u,int v){
	//cout<<"edge "<<u<<" "<<v<<'\n';
	//cout<<L[u]<<" "<<R[u]<<" "<<L[v]<<" "<<R[v]<<'\n';
	if(L[u] >= R[v])return 1; //always cycle
	if(L[v] > R[u])return 0; //never forms cycle
	if(L[v] == L[u] && R[v] == R[u])return 0;//also never forms cycle

	int mu = (L[u] + R[u] + 1)/2;
	int mv = (L[v] + R[v] + 1)/2;
	//[L[u],mu-1] [mu,R[u]]
	if(R[v] < mu){
		R[u] = mu-1;
		for(int x:g[u]){
			if(add(u,x))return 1;
		}
		for(int x:gr[u]){
			if(add(x,u))return 1;
		}
	}
	else if(L[u] >= mv){
		L[v] = mv;
		for(int x:g[v]){
			if(add(v,x))return 1;
		}
		for(int x:gr[v]){
			if(add(x,v))return 1;
		}		
	}
	return 0;
}
int add_teleporter(int u, int v) {
	if(u<k && v<k){
		if(u>=v)return 1;
		return 0;
	}
	g[u].pb(v);
	gr[v].pb(u);
	return add(u,v);

}

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