Submission #705310

#	Time	Username	Problem	Language	Result	Execution time	Memory
705310		danikoynov	Prisoner Challenge (IOI22_prison)	C++17	10 / 100	1083 ms	340 KiB

prison

#include "prison.h"

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



vector<std::vector<int>> devise_strategy(int N)
{
    if (N > 1000)
        while(true);
    vector < vector < int > > strategy;
    int maxnum = 30;
    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 ++)
    {
        int mask = ((j & (1 << 12)) > 0) * 2 + ((j & (1 << 11)) > 0);
        strategy[0][j] = mask + 1;
    }

    for (int i = 1; i <= maxnum; i ++)
    {
        if (i == 25)
        {
            strategy[i][0] = 0;
            for (int j = 1; j <= N; j ++)
            {
                if ((j & 1))
                    strategy[i][j] = -2;
                else
                    strategy[i][j] = -1;
            }
        }
        else if (i > 25)
        {
            if (i > 30)
                continue;
            int dis = i - 25;
            int bit1 = 12 - dis * 2;
            int bit2 = 11 - dis * 2;
            strategy[i][0] = 0;
            for (int j = 1; j <= N; j ++)
            {
                int mask = ((j & (1 << bit1)) > 0) * 2 + ((j & (1 << bit2)) > 0);
                strategy[i][j] = dis * 4 + mask + 1;
            }
        }
        else
        {
            int dis = (i - 1) / 4, mask = (i - 1) % 4;
            int bit1 = 12 - dis * 2;
            int bit2 = 11 - dis * 2;
            ///cout << i << " " << bit1 << " " << bit2 << endl;
            strategy[i][0] = 1;
            for (int j = 1; j <= N; j ++)
            {
                int new_mask = ((j & (1 << bit1)) > 0) * 2 + ((j & (1 << bit2)) > 0);
                ///cout << i << " " << j << " " << new_mask << endl;
                if (new_mask < mask)
                    strategy[i][j] = -2;
                else if (new_mask > mask)
                    strategy[i][j] = -1;
                else
                {

                    if (dis == 5)
                        strategy[i][j] = 25;
                    else
                    strategy[i][j] = 25 + dis + 1;
                }
            }
        }
        /**int type = (i - 1) / 4, bit = (i - type * 13) - 1;
        if (type == 2)
        {
            strategy[i][0] = 0;
            bit --;
            for (int j = 1; j <= N; j ++)
            {
                if ((j & (1 << bit)))
                    strategy[i][j] = get_mask(0, bit + 1);
                else
                    strategy[i][j] = get_mask(1, bit + 1);
            }
        }
        else
        {
            strategy[i][0] = 1;
            for (int j = 1; j <= N; j ++)
            {
                if ((j & (1 << bit)))
                {
                    if (type == 1)
                    {
                        strategy[i][j] = -1;
                    }
                    else
                        strategy[i][j] = get_mask(2, bit + 1);
                }
                else
                {
                    if (type == 0)
                    {
                        strategy[i][j] = -2;
                    }
                    else
                        strategy[i][j] = get_mask(2, bit + 1);
                }
            }
        }*/
    }
        /**for (int i = 0; i <= 30; 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: 0 / 90