Submission #876345

#	Time	Username	Problem	Language	Result	Execution time	Memory
876345		Andrey	Prisoner Challenge (IOI22_prison)	C++17	48.50 / 100	12 ms	1516 KiB

prison

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

int calc(int a, int b) {
    for(int i = 0; i < b; i++) {
        a/=3;
    }
    return a%3;
}

std::vector<std::vector<int>> devise_strategy(int n) {
    vector<vector<int>> ans(0);
    for(int i = 0; i < 32; i++) {
        ans.push_back(vector<int> (n+1));
    }
    for(int i = 0; i < 32; i++) {
        if(i%4 == 0) {
            ans[i][0] = 0;
        }
        else {
            ans[i][0] = 1;
        }
        int d = 7-(i/4);
        for(int j = 1; j <= n; j++) {
            if(i%4 == 0) {
                ans[i][j] = i+1;
                ans[i][j]+=calc(j,d);
            }
            else {
                int x = calc(j,d),y = (i%4)-1;
                if(x == y) {
                    ans[i][j] = min(31,i-(i%4)+4);
                }
                else if(x < y) {
                    ans[i][j] = -2;
                }
                else {
                    ans[i][j] = -1;
                }
            }
        }
    }
    return ans;
}

• Subtask 1: 5 / 5
• Subtask 2: 5 / 5
• Subtask 3: 38.5 / 90