Submission #629242

#	Time	Username	Problem	Language	Result	Execution time	Memory
629242		jakubd	Rarest Insects (IOI22_insects)	C++17	0 / 100	9 ms	252 KiB

insects

#include "insects.h"

#include <bits/stdc++.h>

using namespace std;

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

  move_inside(0);
  for (int i = 1; i < N; i++) {
    move_inside(i);
    if (press_button() == 2) {
      move_outside(i);
      outside.push_back(i);
    } else {
      D++;
    }
  }

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

    vector<int> noutside, mark(N);
    int cur = D;
    for (int x : outside) {
      move_inside(x);
      if (press_button() > m) {
        move_outside(x);
        mark[x] = 1;
        noutside.push_back(x);
      } else {
        inside[x] = 1;
        cur++;
      }
    }

    if (cur >= D * m) {
      l = m + 1;
      ans = m;
      swap(outside, noutside);
    } else {
      if (l == r) break;
      r = m;
      for (int x : outside) {
        if (!mark[x]) {
          move_outside(x);
        }
      }
    }
  }

  return ans;
}

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