Submission #945444

#	Time	Username	Problem	Language	Result	Execution time	Memory
945444		codefox	Cave (IOI13_cave)	C++14	100 / 100	273 ms	604 KiB

cave

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

using namespace std;

void exploreCave(int N) {
    int b[N];
    int ans[N];

    for (int i = 0; i < N; i++)
    {
        b[i] = 0;
        ans[i] = -1;
    }

    for (int i = 0; i < N; i++)
    {
        int f = tryCombination(b);
        if (f !=i)
        {
            for (int j = 0; j < N; j++)
            {
                if (ans[j]==-1) b[j] = 1-b[j];
            }            
        }
        int curr = 0;
        for (int j = 12; j >= 0; j--)
        {
            for (int k = curr; k < curr + (1<<j) && k <N; k++)
            {
                if (ans[k]==-1) b[k] = 1-b[k];
            }
            int h = tryCombination(b);
            for (int k = curr; k < curr + (1<<j) && k <N; k++)
            {
                if (ans[k]==-1) b[k] = 1-b[k];
            }
            if (h != i) continue;
            curr += 1<<j;
        }
        b[curr] = 1-b[curr];
        ans[curr] = i;
    }
    answer(b, ans);
}

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