Submission #1058334

#	Time	Username	Problem	Language	Result	Execution time	Memory
1058334		aykhn	Rarest Insects (IOI22_insects)	C++17	0 / 100	2 ms	344 KiB

insects

#include "insects.h"
#include <bits/stdc++.h>

using namespace std;

int min_cardinality(int N) 
{
  int uni = 0;
  vector<int> v;
  for (int i = 0; i < N; i++)
  {
    move_inside(i);
    if (press_button() > 1) move_outside(i);
    else uni++, v.push_back(i);
  }
  for (int &i : v) move_outside(i);
  v.clear();
  vector<int> in(N, 0);
  vector<int> alive(N, 1);
  int l = 1, r = N / uni;
  int ok = 0;
  while (l < r)
  {
    int mid = (l + r + 1) >> 1;
    for (int i = 0; i < N; i++)
    {
      if (!alive[i]) continue;
      move_inside(i);
      v.push_back(i);
      in[i] = 1;
      if (press_button() > mid) 
      {
        in[i] = 0;
        move_outside(i);
        v.pop_back();
      }
    }
    assert(v.size() <= mid * uni);
    if ((int)v.size() != mid * uni)
    {
      for (int i = 0; i < N; i++)
      {
        if (!in[i]) alive[i] = 0;
      }
      for (int &i : v) move_outside(i), in[i] = 0;
      v.clear();
      r = mid - 1;
    }
    else
    {
      for (int &i : v)
      {
        ok++;
        alive[i] = 0;
        in[i] = 0;
      }
      v.clear();
      l = mid;
    }
  }
  return l;
}

Compilation message (stderr)

In file included from /usr/include/c++/10/cassert:44,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:33,
                 from insects.cpp:2:
insects.cpp: In function 'int min_cardinality(int)':
insects.cpp:38:21: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   38 |     assert(v.size() <= mid * uni);
      |            ~~~~~~~~~^~~~~~~~~~~~

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