Submission #705311

#	Time	Username	Problem	Language	Result	Execution time	Memory
705311		danikoynov	Prisoner Challenge (IOI22_prison)	C++17	56 / 100	14 ms	1156 KiB

prison

#include "prison.h"

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



vector<std::vector<int>> devise_strategy(int N)
{

    vector < vector < int > > strategy;
    int maxnum = 26;
    strategy.resize(maxnum + 1);
    for (int i = 0; i <= maxnum; i ++)
        strategy[i].resize(N + 1);
    strategy[0][0] = 0;
    for (int j = 1; j <= N; j ++)
    {
        if ((j & (1 << 12)))
            strategy[0][j] = 13;
        else
            strategy[0][j] = 26;
    }

    for (int i = 1; i <= maxnum; i ++)
    {
        if (i <= 13)
        {
            int bit = i - 1;
            if (bit % 2 == 0)
            {
                strategy[i][0] = 1;
                for (int j = 1; j <= N; j ++)
                {
                    if ((j & (1 << bit)) == 0)
                        strategy[i][j] = -2;
                    else
                    {
                        if ((j & (1 << (bit - 1))))
                            strategy[i][j] = bit;
                        else
                            strategy[i][j] = bit + 13;
                    }
                }
            }
            else
            {
                strategy[i][0] = 0;
                for (int j = 1; j <= N; j ++)
                {
                    if ((j & (1 << bit)) == 0)
                        strategy[i][j] = -1;
                    else
                    {
                        if ((j & (1 << (bit - 1))))
                            strategy[i][j] = bit;
                        else
                            strategy[i][j] = bit + 13;
                    }
                }
            }
        }
        else
        {
            int bit = i - 14;
            if (bit % 2 == 0)
            {
                strategy[i][0] = 1;
                for (int j = 1; j <= N; j ++)
                {
                    if ((j & (1 << bit)) > 0)
                        strategy[i][j] = -1;
                    else
                    {
                        if ((j & (1 << (bit - 1))))
                            strategy[i][j] = bit;
                        else
                            strategy[i][j] = bit + 13;
                    }
                }
            }
            else
            {
                                strategy[i][0] = 0;
                for (int j = 1; j <= N; j ++)
                {
                    if ((j & (1 << bit)) > 0)
                        strategy[i][j] = -2;
                    else
                    {
                        if ((j & (1 << (bit - 1))))
                            strategy[i][j] = bit;
                        else
                            strategy[i][j] = bit + 13;
                    }
                }
            }
        }
    }
        /**for (int i = 0; i <= 26; i ++, cout << endl)
    for (int j = 1; j <= N; j ++)
        cout << strategy[i][j] << " ";
    cout << endl;*/
    return strategy;
}

• Subtask 1: 5 / 5
• Subtask 2: 5 / 5
• Subtask 3: 46 / 90