Submission #629298

#	Time	Username	Problem	Language	Result	Execution time	Memory
629298		jakubd	Rarest Insects (IOI22_insects)	C++17	99.89 / 100	77 ms	336 KiB

insects

#include "insects.h"

#include <bits/stdc++.h>

using namespace std;

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

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

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

    vector<int> in, out;
    for (int i : can) {
      move_inside(i);
      if (press_button() > m) {
        move_outside(i);
        out.push_back(i);
      } else {
        in.push_back(i);
      }
    }

    if ((int)in.size() == D * (m - ans)) {
      l = m + 1;
      ans = m;
      can = out;
    } else {
      r = m - 1;
      can = in;
      for (auto x : can) {
        move_outside(x);
      }
    }
  }

  return ans;
}

• Subtask 1: 10 / 10
• Subtask 2: 15 / 15
• Subtask 3: 74.89 / 75