Submission #657263

#	Time	Username	Problem	Language	Result	Execution time	Memory
657263		lumibons	Rarest Insects (IOI22_insects)	C++17	99.79 / 100	67 ms	416 KiB

insects

#include "insects.h"

#include <bits/stdc++.h>

using namespace std;

int min_cardinality(int n) {
  int k = 0;
  vector<int> r;
  for (int i = 0; i < n; i++) {
    move_inside(i);
    if (press_button() > 1)
      move_outside(i), r.push_back(i);
    else
      k++;
  }
  int l = k == 1 ? n : 1, u = n / k + 1, c = k;
  while (l + 1 < u) {
    int m = (l + u + 1) / 2;
    vector<int> s, h;
    for (int i : r) {
      move_inside(i);
      if (press_button() > m)
        move_outside(i), h.push_back(i);
      else
        c++, s.push_back(i);
    }
    if (c == k * m) {
      l = m;
      r = h;
    } else {
      u = m;
      for (int i : s)
        c--, move_outside(i);
      r = s;
    }
  }
  return l;
}

• Subtask 1: 10 / 10
• Subtask 2: 15 / 15
• Subtask 3: 74.79 / 75