Submission #831979

#	Time	Username	Problem	Language	Result	Execution time	Memory
831979		dxz05	Prisoner Challenge (IOI22_prison)	C++17	65 / 100	10 ms	1108 KiB

prison

#include "prison.h"
#include <bits/stdc++.h>

using namespace std;

int get(int num, int pos, int base){
    while (pos--) num /= base;
    return num % base;
}

vector<vector<int>> devise_strategy(int N) {
    const int base = 3;
    const int _log = 7;
    const int X = base * (_log + 1);

    vector<vector<int>> s(X + 1, vector<int>(N + 1, 0));

    s[0][0] = 1;
    for (int i = 1; i <= N; i++){
        s[0][i] = _log * base + 1 + get(i, _log, base);
    }

    for (int i = 1; i <= X; i++){
        int b = (i - 1) / base;
        int r = (i - 1) % base;

        int bag = (_log - b) % 2;

        s[i][0] = bag;

        for (int j = 1; j <= N; j++){
            int d = get(j, b, base);
            if (d < r){
                s[i][j] = (bag == 0 ? -1 : -2);
            } else if (d > r){
                s[i][j] = (bag == 0 ? -2 : -1);
            } else if (b > 0){
                int pd = get(j, b - 1, base);
                s[i][j] = (b - 1) * base + 1 + pd;
            }
        }

    }

    return s;
}

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