Submission #1203972

#	Time	Username	Problem	Language	Result	Execution time	Memory
1203972		HappyCapybara	Rarest Insects (IOI22_insects)	C++17	53.84 / 100	49 ms	416 KiB

insects

#include "insects.h"
#include<bits/stdc++.h>
using namespace std;

int min_cardinality(int N){
  vector<bool> in(N, false);
  int t = 0;
  for (int i=0; i<N; i++){
    move_inside(i);
    in[i] = true;
    t++;
    if (press_button() > 1){
      move_outside(i);
      in[i] = false;
      t--;
    }
  }
  if (t == 1) return N;
  int k = t;
  int l = 1, r = N/t+1;
  bool b = false;
  while (l < r-1){
    int m = (l+r)/2;
    if (b){
      for (int i=0; i<N; i++){
        if (!in[i]) continue;
        move_outside(i);
        in[i] = false;
        k--;
      }
    }
    for (int i=0; i<N; i++){
      if (k+N-i < t*m) break;
      if (in[i]) continue;
      move_inside(i);
      in[i] = true;
      k++;
      if (press_button() > m){
        move_outside(i);
        in[i] = false;
        k--;
      }
    }
    if (k == t*m){
      l = m;
      b = false;
    }
    else {
      r = m;
      b = true;
    }
  }
  return l;
}

• Subtask 1: 10 / 10
• Subtask 2: 15 / 15
• Subtask 3: 28.84 / 75