Submission #1008232

#	Time	Username	Problem	Language	Result	Execution time	Memory
1008232		oyber	Prisoner Challenge (IOI22_prison)	C++17	0 / 100	1 ms	432 KiB

prison

#include "prison.h"

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

vector<vector<int>> devise_strategy(int N) {
  vector<vector<int>> s(32);

  for (int i = 2; i < 32; i++) {
    s[i].resize(N+1);

    int counter = i >> 1;
    int other = i & 1;

    int bag = counter % 2;
    s[i][0] = bag;

    for (int j = 1; j <= N; j++) {
      int bit = (j & (1 << counter)) > 0;
      if (bit == other) {
        if (counter == 1) {
          int last_bit = j & 1;
          int lowest = bag;
          if (last_bit == 1) lowest = !bag;
          s[i][j] = -(lowest+1);
        } else {
          int new_counter = counter-1;
          int new_other = (j & (j << new_counter)) > 0;
          s[i][j] = (new_counter << 1) + new_other;
        }
      } else {
        int lowest = bag;
        if (other < bit) lowest = !lowest;
        s[i][j] = -(lowest+1);
      }
    }
  }

  s[0].resize(N+1);
  s[1].resize(N+1);
  s[0][0] = 0;
  int counter = 31 >> 1;
  for (int j = 1; j <= N; j++) {
    int bit = (j & (1 << counter)) > 0;
    s[0][j] = (counter << 1) + bit;
  }

  return s;
}

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