Submission #1037486

#	Time	Username	Problem	Language	Result	Execution time	Memory
1037486		HappyCapybara	Prisoner Challenge (IOI22_prison)	C++17	38 / 100	12 ms	1624 KiB

prison

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

vector<vector<int>> devise_strategy(int N){
  if (N == 2) return {{0, 1, 2}, {1, 0, -1}, {1, -2, 0}};
  int y = floor(log2(N))+1;
  vector<vector<int>> a(3*y, vector<int>(N+1));
  for (int i=0; i<3*y; i++){
    for (int j=0; j<N+1; j++){
      if (i % 3 == 0){
        if (j == 0){
          a[i][j] = 0;
          continue;
        }
        a[i][j] = i+1+min(1, (j&(1<<(y-1-i/3))));
      }
      else {
        if (j == 0){
          a[i][j] = 1;
          continue;
        }
        int b = 1+min(1, j&(1<<(y-1-i/3)));
        if (b == i % 3) a[i][j] = (i+(3-i%3))%(3*y);
        else {
          if (b > i % 3) a[i][j] = -1;
          else a[i][j] =  -2;
        }
      }
    }
  }
  return a;
}

• Subtask 1: 5 / 5
• Subtask 2: 5 / 5
• Subtask 3: 28 / 90