Submission #744787

#	Time	Username	Problem	Language	Result	Execution time	Memory
744787		Teemka	Game (APIO22_game)	C++17	0 / 100	7 ms	9680 KiB

game

#include "bits/stdc++.h"
#include "game.h"

#define F first 
#define S second 

#define OK cout << "------OK---------" << endl;
#define deb(x) cout << #x << " = " << x << endl;

#define ll long long ;
using namespace std ;
const int N = 2e5 + 7;
const int INF = 1e9 + 7 ;
const int dx[4] = {0 , 1 , 0 , -1} , dy[4] = {1 , 0 , -1 , 0} ;
int n , k , ok = 0 , mx[N] , mn[N];
vector<int > g[N] , rev[N] ;

void dfs_mx(int v , int p){
    if(mx[v] >= p)
        return ;
    mx[v] = p;
    if(mx[v] >= mn[v]){
        ok = 1;
        return ;
    }
    for(int to : g[v]){
        dfs_mx(to , p) ;
    }
}


void dfs_mn(int v , int p){
    if(mn[v] <= p)
        return ;
    mn[v] = p;
    if(mx[v] >= mn[v]){
        ok = 1;
        return ;
    }
    for(int to : rev[v]){
        dfs_mn(to , p) ;
    }
}

void init(int _n, int _k) {
    n = _n , k = _k ;
    for(int i = 0; i< k - 1; i++){
        mn[i] = i ;
        mx[i] = 0 ;
        g[i].push_back(i + 1) ;
        rev[i + 1].push_back(i) ;
    }

    for(int i = k ;  i< n; i ++){
        mx[i] = -1 ;
        mn[i] = n ;
    }
}

int add_teleporter(int u, int v) {
    g[u].push_back(v) ;
    rev[v].push_back(u) ;
    if(u <= k - 1 and v <= k - 1)
        return 1;
    if(u <= k - 1){
        dfs_mx(v , max(mx[u] , u)) ;
        dfs_mn(u , mn[v]) ;
    }
    else if(v <= k - 1 ){
        dfs_mx(v , mx[u]) ;
        dfs_mn(u , min(mn[v] , v)) ;
    }
    else{
        dfs_mx(v , mx[u]) ;
        dfs_mn(u , mn[v]) ;
    }
    return ok ;
}

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