제출 #629033

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
629033		Lam_lai_cuoc_doi	죄수들의 도전 (IOI22_prison)	C++17	65 / 100	60 ms	98324 KiB

prison

#include "prison.h"

#include <vector>
#include <algorithm>
using namespace std;

constexpr int N = 5005;

vector<vector<int>> a;
int n, maxbit;
bool ck[N];

#define bit(i, x) (((x) >> (i)) & 1)

void Recursive(int v)
{

    if (ck[v])
        return;

    ck[v] = 1;

    if (v == 0)
    {
        a[v][0] = 0;

        for (int i = 1; i <= n; ++i)
            a[v][i] = maxbit - 1 + (bit(maxbit, i) * maxbit) + 1;

        for (int i = 1; i <= n; ++i)
            if (a[v][i] > 0)
                Recursive(a[v][i]);

        return;
    }

    --v;
    int number, state;

    if (v >= maxbit)
    {
        state = 1;
        number = v - maxbit;
    }
    else
    {
        state = 0;
        number = v;
    }

    ++number;
    ++v;

    if ((number & 1) == (maxbit & 1))
    {
        a[v][0] = 1;

        for (int i = 1; i <= n; ++i)
            if (bit(number, i) < state)
                a[v][i] = -2;
            else if (bit(number, i) > state)
                a[v][i] = -1;
            else
            {
                if (number == 1)
                {
                    if (bit(0, i))
                        a[v][i] = -1;
                    else
                        a[v][i] = -2;
                }
                else
                    a[v][i] = number - 1 + (bit(number - 1, i) * maxbit);
            }
        for (int i = 1; i <= n; ++i)
            if (a[v][i] > 0)
                Recursive(a[v][i]);
    }
    else
    {
        a[v][0] = 0;

        for (int i = 1; i <= n; ++i)
            if (bit(number, i) < state)
                a[v][i] = -1;
            else if (bit(number, i) > state)
                a[v][i] = -2;
            else
            {
                if (number == 1)
                {
                    if (bit(0, i))
                        a[v][i] = -2;
                    else
                        a[v][i] = -1;
                }
                else
                    a[v][i] = number - 1 + (bit(number - 1, i) * maxbit);
            }

        for (int i = 1; i <= n; ++i)
            if (a[v][i] > 0)
                Recursive(a[v][i]);
    }
}

std::vector<std::vector<int>> devise_strategy(int m)
{
    n = m;
    maxbit = __lg(n);
    a.resize(5000, vector<int>(n + 1, 0));
    Recursive(0);

    while (!ck[a.size() - 1])
        a.pop_back();

    return a;
}

• Subtask 1: 5 / 5
• Subtask 2: 5 / 5
• Subtask 3: 55 / 90