Submission #762128

#	Time	Username	Problem	Language	Result	Execution time	Memory
762128		raysh07	Prisoner Challenge (IOI22_prison)	C++17	0 / 100	0 ms	212 KiB

prison

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

vector<vector<int>> devise_strategy(int n) {
    vector<vector<int>> ans(27, vector<int>(n + 1));
    for (int i = 0; i <= 26; i++){
        if (i == 0){
            int bit = 12;
            ans[i][0] = 0;
            for (int j = 1; j <= n; j++){
                ans[i][j] = 1 + (j >> bit & 1);
            }
        } else if (i % 4 == 1 || i % 4 == 2){
            int bit = 12 - (i / 4);
            ans[i][0] = 1;
            for (int j = 1; j <= n; j++){
                int a = (i % 4) - 1;
                int b = j >> bit & 1;
                
                if (a > b) ans[i][j] = -2;
                else if (a < b) ans[i][j] = -1;
                else {
                    bit++;
                    int x = i + 1;
                    if (i % 4 == 1) x++;
                    ans[i][j] = x + (j >> bit & 1);
                }
            }
        } else {
            int bit = 12 - (i + 1) / 4;
            ans[i][0] = 0;
            for (int j = 1; j <= n; j++){
                int b;
                if (i % 4 == 0) b = 1;
                else b = 0;
                int a = j >> bit & 1;
                
                if (a > b) ans[i][j] = -2;
                else if (a < b) ans[i][j] = -1;
                else {
                    bit++;
                    int x = i + 1;
                    if (i % 4 == 3) x++;
                    
                    ans[i][j] = x + (j >> bit & 1);
                }
            }
        }
    }
    for (auto &x : ans) for (auto &y : x) if (y > 26) y = 0;
    return ans;
}

• Subtask 1: 0 / 5
• Subtask 2: 0 / 5
• Subtask 3: 0 / 90