Submission #123562

#	Time	Username	Problem	Language	Result	Execution time	Memory
123562		johutha	Cave (IOI13_cave)	C++14	51 / 100	2048 ms	512 KiB

cave

#include "cave.h"
#include <vector>
#include <iostream>

using namespace std;

int n;
vector<int> perms;
vector<int> combsol;

int ask(vector<int> out)
{
    vector<int> tos(n);
    for (int i = 0; i < n; i++)
    {
        if (perms[i] != -1)
        {
            tos[i] = combsol[i];
        }
        else
        {
            tos[i] = out[i];
        }
    }
    int r = tryCombination(tos.data());
    return r;
}

int ask0()
{
    vector<int> tos(n);
    for (int i = 0; i < n; i++)
    {
        if (perms[i] != -1)
        {
            tos[i] = combsol[i];
        }
        else
        {
            tos[i] = 0;
        }
    }
    int r = tryCombination(tos.data());
    return r;
}

void exploreCave(int in)
{
    n = in;
    perms.resize(n, -1);
    combsol.resize(n, -1);
    int l2 = 13;
    for (int i = 0; i < n; i++)
    {
        int resp = 0;
        bool inv = (ask0() != i);
        int up = 1;
        for (int j = 0; j < l2; j++)
        {
            vector<int> out(n);
            for (int k = 0; k < n; k++)
            {
                out[k] = inv ^ ((k / up) % 2);
            }
            int r = ask(out);
            if (r != i) resp += up;
            up *= 2;
        }
        perms[resp] = i;
        combsol[resp] = !inv;
    }
    answer(combsol.data(), perms.data());
}

• Subtask 1: 0 / 12
• Subtask 2: 0 / 13
• Subtask 3: 21 / 21
• Subtask 4: 30 / 30
• Subtask 5: 0 / 24