Submission #897061

#	Time	Username	Problem	Language	Result	Execution time	Memory
897061		Litusiano	Game (APIO22_game)	C++17	2 / 100	1 ms	344 KiB

game

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


int k1,n1;

vector<vector<int>> G1,Grev1, DAG;
vector<int> reachable0, reachablek;
int act = 0;
bool ok = 0;
void dfs2(int u){
	if(reachable0[u]) return;
	reachable0[u] = 1;
	if(reachable0[u] + reachablek[u] == 2) ok = 1;
	// cerr<<"START "<<u<<endl;
	for(int v : G1[u]) dfs2(v);
	// cerr<<"END "<<u<<endl;
	// top.push_back(u);
}
void dfs3(int u){
	if(reachablek[u]) return;
	reachablek[u] = 1;
	if(reachable0[u] + reachablek[u] == 2) ok = 1;
	for(int v : Grev1[u]){
		dfs3(v);
	}
	// scc[u] = act;
}

int add_teleporter(int u, int v) {

	// if(scc.size() && scc[u] == scc[v] && scc[u] > -1) return 0;
	if(u == v){
		if(u < k1) return 1;
		return 0;
	}
	if(max(u,v) < k1){
		if(u > v) return 1;
		return 0;
	}
	G1[u].push_back(v);
	Grev1[v].push_back(u);
	if(reachable0[u] && !reachable0[v]){
		dfs2(v);
	}
	if(reachablek[v] && !reachablek[u]){
		dfs3(u);
	}
  return ok;
}


void init(int n, int k) {
	k1 = k; n1 = n;
	G1.assign(n,vector<int>());
	Grev1 = G1;
	// cerr<<"HERE "<<n<<" "<<k<<endl;
	reachable0.assign(n,0);
	reachablek.assign(n,0);
	ok = 0;
	reachable0[0] = 1; reachablek[0] = 1;
	for(int i = 0; i<=k-2; i++){
		reachable0[i+1] = reachablek[i+1] = 1;
		G1[i].push_back(i+1);
		Grev1[i+1].push_back(i);
	}
}

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