Submission #852538

#	Time	Username	Problem	Language	Result	Execution time	Memory
852538		muratcepeda	Cave (IOI13_cave)	C++17	100 / 100	205 ms	868 KiB

cave

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

using namespace std;

void exploreCave(int N) {
    int arr[N], bien[N], puerta[N], pos[N];
    int ini = 0;
    int fin = N;
    int mitad = 0;
    int ayu = 0;
    int nuevo = 0;
    for(int i = 0; i < N; ++i) arr[i] = bien[i] = puerta[i] = pos[i] = 0;
    for(int i = 0; i < N; ++i){
        for(int borra = 0; borra < N; ++borra){
            if(bien[borra] == 0) arr[borra] = 0;
        }
        ayu = tryCombination(arr);
        ini = 0;
        fin = N - 1;
        while(ini < fin){

            mitad = (ini + fin) / 2;
            for(int j = ini; j <= mitad; ++j)if(bien[j] == 0) arr[j] ^= 1;
            nuevo = tryCombination(arr);
            if (!i){
                //cout << ini << " " << fin << " " << mitad << " " << ayu << " " << nuevo << "\n";
            }
            if(nuevo == ayu || (ayu != i && nuevo != i)) ini = mitad + 1;
            else fin = mitad;
            ayu = nuevo;
        }
        puerta[fin] = i;
        if(ayu == i) arr[fin] ^= 1;
        pos[fin] = arr[fin]; 
        bien[fin] = 1;
    }
    answer(pos, puerta);
}

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