제출 #302935

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
302935		mohamedsobhi777	Cave (IOI13_cave)	C++14	100 / 100	549 ms	764 KiB

cave

#include "cave.h"
#include <vector>
#include<bits/stdc++.h>

using namespace std ; 

int n ; 
int *pos, *loc; 
bool vis[10000] ; 
int it, col ;
void flip(){
        for(int i = 0 ;i < n ;i++)
                pos[i]^=1 ; 
}

vector<int> btns ; 

void init(int N){
        n = N ; 
        pos = new int[N] ;
        loc = new int[N] ; 
        memset(pos , 0 , sizeof(int) * N) ; 
        memset(loc , 0 , sizeof(int) * N) ;
        for(int i = 0 ;i < N ;i++)
                btns.push_back(i) ;
}

int go(vector<int> vec, vector<int> vec2, int door){
        int ret = n ; 
        int *qu = pos ; 
        for(auto u : vec){
                qu[u] = col ;
        }
        for(auto u : vec2){
                qu[u] = !col; 
        }
        ret = tryCombination(qu) ;

        return ret != door ; 
}

void solve( vector<int> swi , int door){
        if(swi . size() == 1){
                pos[swi[0]] = 0 ; 
                if(tryCombination(pos) == door){
                        pos[swi[0]] ^= 1 ; 
                }                        
                vis[swi[0]] = 1 ; 

                loc[ swi[0] ] = it ; 
                for(int i = 0 ;i < (int) btns.size() ; ++ i){
                        if(btns[i] == swi[0]){
                                btns.erase(btns.begin() + i) ;
                                break ; 
                        }
                }
                it++ ;
                return ; 
        }
        vector<int> LHS , RHS ; 
        int sz = (int) swi.size() ; 
        for(int i = 0 ;i < sz ;i ++){
                if(i < sz / 2)
                        LHS.push_back(swi[i]) ; 
                else
                        RHS.push_back(swi[i]) ; 
        }

        if(go(LHS, RHS , door)){
                solve(LHS, door) ; 
        }else{
                solve(RHS, door) ; 
        }

}

void exploreCave(int N) {
        init(N); 
        for(int i = 0 ;i < n;i++){
                for(int j = 0 ;j < n ;j ++){
                        if(!vis[j])
                                pos[j] = 0 ; 
                }
                col = (tryCombination(pos) == i) ;
                solve(btns , i) ;         
        }

        answer(pos , loc) ; 
}

• Subtask 1: 12 / 12
• Subtask 2: 13 / 13
• Subtask 3: 21 / 21
• Subtask 4: 30 / 30
• Subtask 5: 24 / 24