Submission #1203059

#	Time	Username	Problem	Language	Result	Execution time	Memory
1203059		LucaLucaM	Rarest Insects (IOI22_insects)	C++20	25 / 100	98 ms	432 KiB

insects

#include "insects.h"
#include <vector>
#include <algorithm>
#include <cassert>
#include <random>
#include <iostream>

std::mt19937 rng(123);

int min_cardinality(int n) {
  std::vector<int> reprezentant;
  std::vector<int> order(n);
  for (int i = 0; i < n; i++) {
    order[i] = i;
  }
  std::shuffle(order.begin(), order.end(), rng);
  for (int i : order) {
    move_inside(i);
    if (press_button() >= 2) {
      move_outside(i);
    } else {
      reprezentant.push_back(i);
    }
  }

  std::vector<bool> taken(n, false);

  if ((int) reprezentant.size() > n / 2) {
    return 1;
  }

  int mini = n;

  for (int i : reprezentant) {
    taken[i] = true;
    int me = 1; // doar pe i
    move_inside(i);
    for (int x : order) {
      if (me >= mini) {
        break;
      }
      if (!taken[x]) {
        move_inside(x);
        if (press_button() == 2) {
          taken[x] = true;
          me++;
        }
        move_outside(x);
      }
    }
    move_outside(i);
    mini = std::min(mini, me);
  }

  return mini;
}

• Subtask 1: 10 / 10
• Subtask 2: 15 / 15
• Subtask 3: 0 / 75