Submission #876471

#	Time	Username	Problem	Language	Result	Execution time	Memory
876471		Andrey	Prisoner Challenge (IOI22_prison)	C++17	65 / 100	14 ms	1116 KiB

prison

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


std::vector<std::vector<int>> devise_strategy(int n) {
    vector<vector<int>> ans(0);
    for(int i = 0; i < 25; i++) {
        ans.push_back(vector<int> (n+1));
    }
    for(int i = 0; i < 25; i++) {
        if(i == 0) {
            ans[i][0] = 0;
            for(int j = 1; j <= n; j++) {
                ans[i][j] = 23;
                if(j&(1 << 12)) {
                    ans[i][j]++;
                }
            }
        }
        else {
            int d = (i+1)/2;
            int c = d%2;
            bool x = (i+1)%2;
            if(c == 0) {
                ans[i][0] = 1;
            }
            else {
                ans[i][0] = 0;
            }
            for(int j = 1; j <= n; j++) {
                bool y = ((1 << d)&j);
                if(x < y) {
                    if(c == 0) {
                        ans[i][j] = -1;
                    }
                    else {
                        ans[i][j] = -2;
                    }
                }
                else if(x > y) {
                    if(c == 0) {
                        ans[i][j] = -2;
                    }
                    else {
                        ans[i][j] = -1;
                    }
                }
                else {
                    if(d > 0) {
                        if(d == 1) {
                            if(j%2 == 1) {
                                ans[i][j] = -2;
                            }
                            else {
                                ans[i][j] = -1;
                            }
                        }
                        else {
                            ans[i][j] = d*2-3+((j&(1 << (d-1))) > 0);
                        }
                    }
                    else {
                        ans[i][j] = 4;
                    }
                }
            }
        }
    }
    return ans;
}

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