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Submission #1058352

# Submission time Handle Problem Language Result Execution time Memory
1058352 2024-08-14T09:30:45 Z aykhn Rarest Insects (IOI22_insects) C++17
0 / 100
 1 ms 344 KB 
#include "insects.h"
#include <bits/stdc++.h>

using namespace std;

mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());

int min_cardinality(int N) 
{
  vector<int> ord(N, 0);
  iota(ord.begin(), ord.end(), 0);
  shuffle(ord.begin(), ord.end(), rng);
  int uni = 0;
  vector<int> v;
  for (int &i : ord)
  {
    move_inside(i);
    if (press_button() > 1) move_outside(i);
    else uni++, v.push_back(i);
  }
  for (int &i : v) move_outside(i);
  if (uni == 1) return N;
  if (uni == N) return 1;
  v.clear();
  vector<int> in(N, 0);
  vector<int> alive(N, 1);
  int l = 2, r = N / uni;
  int cur = 0;
  while (l < r)
  {
    int mid = (l + r + 1) >> 1;
    for (int &i : ord)
    {
      if (!alive[i]) continue;
      move_inside(i);
      v.push_back(i);
      cur++;
      in[i] = 1;
      if (press_button() > mid) 
      {
        cur--;
        in[i] = 0;
        move_outside(i);
        v.pop_back();
      }
    }
    if (cur != mid * uni)
    {
      for (int i = 0; i < N; i++)
      {
        if (!in[i]) alive[i] = 0;
      }
      for (int &i : v) 
      {
        cur--;
        move_outside(i), in[i] = 0;
      }
      v.clear();
      r = mid - 1;
    }
    else
    {
      for (int &i : v)
      {
        alive[i] = 0;
        in[i] = 0;
      }
      v.clear();
      l = mid;
    }
  }
  return l;
}

Subtask #1
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 344 KB Output is correct
3 Incorrect 0 ms 344 KB Wrong answer.
4 Halted 0 ms 0 KB -

Subtask #2
0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 344 KB Output is correct
3 Incorrect 0 ms 344 KB Wrong answer.
4 Halted 0 ms 0 KB -

Subtask #3
0 / 75.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 344 KB Wrong answer.
2 Halted 0 ms 0 KB -