Submission #629256

#	Time	Username	Problem	Language	Result	Execution time	Memory
629256		jakubd	Rarest Insects (IOI22_insects)	C++17	0 / 100	1 ms	208 KiB

insects

#include "insects.h"

#include <bits/stdc++.h>

using namespace std;

int min_cardinality(int N) {
  int D = 1;
  vector<int> inside(N), outside(N), leader(N);

  move_inside(0); inside[0] = leader[0] = 1;
  for (int i = 1; i < N; i++) {
    move_inside(i);
    if (press_button() == 2) {
      move_outside(i);
      outside[i] = 1;
    } else {
      D++;
      inside[i] = leader[i] = 1;
    }
  }

  for (int i = 0; i < N; i++) {
    if (inside[i]) {
      move_outside(i);
    }
  }

  int l = 1, r = N / D, ans = N, cur = D;
  while (l <= r) {
    int m = (l + r) / 2;

    for (int i = 0; i < N; i++) {
      if (inside[i]) continue;
      move_inside(i);
      if (press_button() > m) {
        move_outside(i);
      } else {
        inside[i] = 1;
        outside[i] = 0;
        cur++;
      }
    }

    if (cur >= D * m) {
      l = m + 1;
      ans = m;
    } else {
      if (l == r) break;
      r = m;
      for (int i = 0; i < N; i++) {
        if (!leader[i] && inside[i]) {
          move_outside(i);
          inside[i] = 0;
          outside[i] = 1;
        }
      }
    }
  }

  return ans;
}

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