Submission #1066361

#	Time	Username	Problem	Language	Result	Execution time	Memory
1066361		j_vdd16	Prisoner Challenge (IOI22_prison)	C++17	65 / 100	8 ms	1116 KiB

prison

#include "prison.h"

#include <algorithm>
#include <bitset>
#include <cstdint>
#include <cstring>
#include <iostream>
#include <limits.h>
#include <math.h>
#include <map>
#include <numeric>
#include <queue>
#include <set>
#include <stack>
#include <string>
#include <vector>

//#define int long long
#define loop(X, N) for(int X = 0; X < (N); X++)
#define all(V) V.begin(), V.end()
#define rall(V) V.rbegin(), V.rend()

using namespace std;

typedef vector<int> vi;
typedef vector<vi> vvi;
typedef pair<int, int> ii;
typedef vector<ii> vii;
typedef vector<vector<ii>> vvii;
typedef vector<bool> vb;
typedef vector<vector<bool>> vvb;

vvi devise_strategy(int N) {
    //13 + 4 + 4
    //13: 
    //4: index of next bit to search in A
    //4: highest set bit in first bag

    //5000 * 13 * 13
    //

    int pow3[9] = { 1, 3, 9, 27, 81, 243, 729, 2187, 6561};

    vvi out(25, vi(N + 1));
    loop(num, 25) {
        if (num == 0) {
            out[num][0] = 0;
            for (int value = 1; value <= N; value++) {
                if (value < pow3[7]) {
                    out[num][value] = 7 + 1;
                }
                else if (value < 2 * pow3[7]) {
                    out[num][value] = 7 + 8 + 1;
                }
                else {
                    out[num][value] = 7 + 2 * 8 + 1;
                }
            }

            continue;
        }

        int exp = (num - 1) % 8;
        int player = exp % 2;
        out[num][0] = player;

        int bit3 = (num - 1) / 8;
        for (int value = 1; value <= N; value++) {
            if ((value % pow3[exp + 1]) < pow3[exp]) {
                if (bit3 > 0) {
                    out[num][value] = -1 - player;
                    continue;
                }
            }
            else if ((value % pow3[exp + 1]) < 2 * pow3[exp]) {
                if (bit3 > 1) {
                    out[num][value] = -1 - player;
                    continue;
                }
                if (bit3 < 1) {
                    out[num][value] = -1 - (1 - player);
                    continue;
                }
            }
            else {
                if (bit3 > 2) {
                    out[num][value] = -1 - player;
                    continue;
                }
                if (bit3 < 2) {
                    out[num][value] = -1 - (1 - player);
                    continue;
                }
            }

            if (exp == 0) {
                out[num][value] = 0;
                continue;
            }

            if ((value % pow3[exp]) < pow3[exp - 1]) {
                out[num][value] = exp - 1 + 0 * 8 + 1;
            }
            else if ((value % pow3[exp]) < 2 * pow3[exp - 1]) {
                out[num][value] = exp - 1 + 1 * 8 + 1;
            }
            else {
                out[num][value] = exp - 1 + 2 * 8 + 1;
            }
        }
    }

    return out;
}

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