Submission #467524

#	Time	Username	Problem	Language	Result	Execution time	Memory
467524		Valaki2	Cave (IOI13_cave)	C++14	100 / 100	253 ms	460 KiB

cave

#include "cave.h"

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

void exploreCave(int N) {
    int n = N;
    int correctPosition[n];
    int connectedDoor[n];
    int tryCombinationArray[n];
    for(int i = 0; i < n; ++i) {
        correctPosition[i] = -1;
        connectedDoor[i] = -1;
        tryCombinationArray[i] = 0;
    }
    for(int i = 0; i < n; ++i) {
        int swappedTo[n];
        for(int j = 0; j < n; ++j) {
            swappedTo[j] = 0;
            if(correctPosition[j] == -1) {
                tryCombinationArray[j] = 0;
            } else {
                tryCombinationArray[j] = correctPosition[j];
            }
        }
        int pos = tryCombination(tryCombinationArray);
        if(pos == i) pos = 1;
        else pos = 0;
        int l = 0, r = n;
        while(l < r - 1) {
            int ce = (l + r) / 2;
            for(int j = l; j < ce; ++j) {
                swappedTo[j] = 1 - swappedTo[j];
                if(correctPosition[j] == -1) {
                    tryCombinationArray[j] = swappedTo[j];
                } else {
                    tryCombinationArray[j] = correctPosition[j];
                }
            }
            int result = tryCombination(tryCombinationArray);
            if(((pos == swappedTo[l]) && (result != i)) || ((pos != swappedTo[l]) && (result == i))) {
                r = ce;
            } else {
                l = ce;
            }
        }
        connectedDoor[l] = i;
        correctPosition[l] = pos;
    }
    answer(correctPosition, connectedDoor);
}

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