제출 #1105671

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1105671		jadai007	동굴 (IOI13_cave)	C++17	0 / 100	181 ms	600 KiB

cave

#include "cave.h"
#include<bits/stdc++.h>
 
using namespace std;
 
void exploreCave(int N) {
    int swi[N] = {0}, door[N] = {0}, tmp[N] = {0}, state[N] = {0};
    for(int i = 0; i < N; ++i){
        int l = 0, r = N - 1;
        int ck = tryCombination(swi);
        int open = (ck == -1 || ck > i);
        while(l < r){
            int mid = (l + r) >> 1;
            for(int j = 0; j < N; ++j) tmp[j] = swi[j];
            for(int j = l; j <= mid; ++j) if(!state[i]) tmp[i]^=1;
            if(open){
                if(tryCombination(tmp) == i) r = mid;
                else l = mid + 1;
            }
            else{
                int ck = tryCombination(tmp);
                if(ck > i || ck == -1) r = mid;
                else l = mid + 1;
            }
        }
        door[r] = i;
        state[r] = 1;
        if(!open) swi[r]^=1;
    }
    answer(swi, door);
}

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