Submission #1230024

#	Time	Username	Problem	Language	Result	Execution time	Memory
1230024		badge881	Prisoner Challenge (IOI22_prison)	C++20	0 / 100	0 ms	324 KiB

prison

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

vector<vector<int>> devise_strategy(int N)
{
    vector<vector<int>> result(37, vector<int>(N + 1, 0));
    int power = 12;
    for (int i = 0; i < 12; i++)
    {
        for (int j = 1; j <= N; j++)
            if (j & (1 << power))
                result[i][j] = 13 + i;
            else
                result[i][j] = 25 + i;
        power--;
    }
    // cas final on verifie la pow 0 (0 ou 1) et on decide directement car forcement differents
    for (int j = 1; j <= N; j++)
        if (j % 2 == 0)
            result[12][j] = -2; // prend sac A
        else
            result[12][j] = -1; // prend sac B

    power = 12;
    for (int i = 13; i < 25; i++)
    {
        // sac A a la power `power` active
        result[i][0] = 1;
        for (int j = 1; j <= N; j++)
            if (j & (1 << power))
                result[i][j] = i - 12;
            else
                result[i][j] = -1; // prend sac B
        power--;
    }
    power = 12;
    for (int i = 25; i < 37; i++)
    {
        // sac A a la power `power` disactive
        result[i][0] = 2;
        for (int j = 1; j <= N; j++)
            if (j & (1 << power))
                result[i][j] = -2; // prend sac A
            else
                result[i][j] = i - 24;
        power--;
    }

    return result;
}

#ifdef HOME
int main()
{
    int N;
    cin >> N;

    vector<vector<int>> result = devise_strategy(N);

    // for (int i = 0; i < 37; i++)
    // {
    //     cout << "I read " << i << " on board, I will see bag " << result[i][0] << " and write on board: ";
    //     for (int j = 1; j <= N; j++)
    //         cout << result[i][j] << " ";
    //     cout << endl;
    // }
    random_device rd;
    uniform_int_distribution<> dis(1, N);
    for (int i = 0; i < 50; i++)
    {
        int tab = 0;
        int sacA = dis(rd), sacB = dis(rd);
        while (tab >= 0)
            if (result[tab][0] == 0)
                tab = result[tab][sacA];
            else
                tab = result[tab][sacB];
        if (tab == -2 && sacA < sacB or tab == -1 && sacA > sacB)
            ;
        else
            cout << "I lose! A = " << sacA << " B = " << sacB << endl;
    }

    return 0;
}
#endif

• Subtask 1: 0 / 5
• Subtask 2: 0 / 5
• Subtask 3: 0 / 90