Submission #1023122

#	Time	Username	Problem	Language	Result	Execution time	Memory
1023122		vjudge1	Prisoner Challenge (IOI22_prison)	C++17	50 / 100	11 ms	1368 KiB

prison

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

using namespace std;

#define rall(s) s.rbegin(), s.rend()
#define all(s) s.begin(), s.end()
#define sz(s) (int)s.size()
#define s second 
#define f first 

using ll = long long;
using pii = pair<int, int>; 
using pll = pair<ll, ll>;

const int N = 1e6;

vector<vector<int>> devise_strategy(int n) {
    int pw[8];
    pw[0] = 1;
    for (int i = 1; i < 8; i++) pw[i] = pw[i - 1] * 3;
    vector<int> f(31), g(40);
    int j = 0;
    for (int i = 0; i <= 30; i++, j++) {
        if (j == 2 || j == 4) j++;
        f[i] = j;
        g[j] = i;
    }
    vector<vector<int>> ans;
    for (int z = 0; z <= 30; z++) {
        int x = f[z];
        if (!x) {
            vector<int> s = {0};
            for (int i = 1; i <= n; i++) {
                int v = (i / pw[7]) % 3 + 1;
                s.push_back(g[7 * 4 + v + 1]);
            }
            ans.push_back(s);
            continue;
        }
        int v = x - 1;
        if (v % 4) {
            vector<int> s = {1};
            int b = v / 4, is = v % 4 - 1;
            for (int i = 1; i <= n; i++) {
                int y = (i / pw[b]) % 3;
                if (is < y) s.push_back(-1);
                else if (is > y) s.push_back(-2);
                else {
                    if (!b) s.push_back(-1);
                    else s.push_back(g[(b - 1) * 4 + 1]);
                }
            }
            ans.push_back(s);
        }else {
            vector<int> s = {0};
            int b = v / 4;
            for (int i = 1; i <= n; i++) {
                int y = (i / pw[b]) % 3 + 1;
                if (!b && y == 1) s.push_back(-1);
                else if (!b && y == 3) s.push_back(-2);
                else s.push_back(g[b * 4 + y + 1]);
            }
            ans.push_back(s);
        }
    }
    return ans;
}

• Subtask 1: 5 / 5
• Subtask 2: 5 / 5
• Subtask 3: 40 / 90