oj.uz

Submission #1088385

# Submission time Handle Problem Language Result Execution time Memory
1088385 2024-09-14T10:15:39 Z abczz Rarest Insects (IOI22_insects) C++17
100 / 100
 41 ms 968 KB 
#include "insects.h"
#include <iostream>
#include <vector>
#include <random>
#define ll long long

using namespace std;

random_device rd;
mt19937 mt(rd());
int min_cardinality(int N) {
  vector <ll> V, X, A, B;
  ll s = 0, a, b, mid, f = 1;
  for (int i=0; i<N; ++i) {
    move_inside(i);
    auto res = press_button();
    if (res > 1) {
      move_outside(i);
      X.push_back(i);
    }
    else V.push_back(i);
  }
  for (auto u : V) move_outside(u);
  s = V.size();
  while (true) {
    A.clear();
    B.clear();
    if (X.size() < s) return f;
    a = (X.size() / s) / 2;
    a = max(a, 1LL);
    b = a+1;
    b = min(b, (ll)X.size()/s);
    if (abs(a*s-(ll)X.size()/2) > abs(b*s-(ll)X.size()/2) || mt() % 4 == 3) mid = b;
    else mid = a;
    ll p = -1;
    for (auto u : X) {
      move_inside(u);
      auto res = press_button();
      if (res == mid && p == -1) p = u;
      if (res > mid) {
        B.push_back(u);
        move_outside(u);
      }
      else A.push_back(u);
    }
    for (auto u : A) move_outside(u);
    if (A.size() == mid * s) {
      swap(X, B);
      f += mid;
    }
    else {
      swap(X, A);
      for (int i=0; i<X.size(); ++i) {
        if (X[i] == p) {
          swap(X[i], X.back());
          X.pop_back();
          break;
        }
      }
    }
  }
}

Compilation message

insects.cpp: In function 'int min_cardinality(int)':
insects.cpp:28:18: warning: comparison of integer expressions of different signedness: 'std::vector<long long int>::size_type' {aka 'long unsigned int'} and 'long long int' [-Wsign-compare]
   28 |     if (X.size() < s) return f;
      |         ~~~~~~~~~^~~
insects.cpp:47:18: warning: comparison of integer expressions of different signedness: 'std::vector<long long int>::size_type' {aka 'long unsigned int'} and 'long long int' [-Wsign-compare]
   47 |     if (A.size() == mid * s) {
      |         ~~~~~~~~~^~~~~~~~~~
insects.cpp:53:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   53 |       for (int i=0; i<X.size(); ++i) {
      |                     ~^~~~~~~~~

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 1 ms 344 KB Output is correct
3 Correct 0 ms 344 KB Output is correct
4 Correct 0 ms 344 KB Output is correct
5 Correct 0 ms 344 KB Output is correct
6 Correct 3 ms 600 KB Output is correct
7 Correct 1 ms 344 KB Output is correct
8 Correct 3 ms 344 KB Output is correct
9 Correct 3 ms 344 KB Output is correct
10 Correct 2 ms 344 KB Output is correct
11 Correct 1 ms 344 KB Output is correct
12 Correct 3 ms 344 KB Output is correct
13 Correct 3 ms 344 KB Output is correct
14 Correct 4 ms 344 KB Output is correct
15 Correct 3 ms 344 KB Output is correct
16 Correct 5 ms 344 KB Output is correct
17 Correct 3 ms 344 KB Output is correct
18 Correct 3 ms 344 KB Output is correct
19 Correct 3 ms 344 KB Output is correct
20 Correct 2 ms 344 KB Output is correct
21 Correct 2 ms 344 KB Output is correct
22 Correct 1 ms 344 KB Output is correct

Subtask #2
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 1 ms 344 KB Output is correct
3 Correct 0 ms 344 KB Output is correct
4 Correct 0 ms 344 KB Output is correct
5 Correct 0 ms 344 KB Output is correct
6 Correct 3 ms 600 KB Output is correct
7 Correct 1 ms 344 KB Output is correct
8 Correct 3 ms 344 KB Output is correct
9 Correct 3 ms 344 KB Output is correct
10 Correct 2 ms 344 KB Output is correct
11 Correct 1 ms 344 KB Output is correct
12 Correct 3 ms 344 KB Output is correct
13 Correct 3 ms 344 KB Output is correct
14 Correct 4 ms 344 KB Output is correct
15 Correct 3 ms 344 KB Output is correct
16 Correct 5 ms 344 KB Output is correct
17 Correct 3 ms 344 KB Output is correct
18 Correct 3 ms 344 KB Output is correct
19 Correct 3 ms 344 KB Output is correct
20 Correct 2 ms 344 KB Output is correct
21 Correct 2 ms 344 KB Output is correct
22 Correct 1 ms 344 KB Output is correct
23 Correct 14 ms 600 KB Output is correct
24 Correct 4 ms 344 KB Output is correct
25 Correct 14 ms 344 KB Output is correct
26 Correct 14 ms 708 KB Output is correct
27 Correct 15 ms 856 KB Output is correct
28 Correct 4 ms 344 KB Output is correct
29 Correct 10 ms 600 KB Output is correct
30 Correct 18 ms 608 KB Output is correct
31 Correct 20 ms 460 KB Output is correct
32 Correct 15 ms 344 KB Output is correct
33 Correct 17 ms 464 KB Output is correct
34 Correct 12 ms 344 KB Output is correct
35 Correct 11 ms 344 KB Output is correct
36 Correct 16 ms 464 KB Output is correct
37 Correct 21 ms 856 KB Output is correct
38 Correct 11 ms 344 KB Output is correct
39 Correct 10 ms 468 KB Output is correct
40 Correct 5 ms 600 KB Output is correct
41 Correct 7 ms 344 KB Output is correct

Subtask #3
75.0 / 75.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 0 ms 344 KB Output is correct
3 Correct 0 ms 344 KB Output is correct
4 Correct 0 ms 344 KB Output is correct
5 Correct 0 ms 344 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 35 ms 716 KB Output is correct
8 Correct 9 ms 684 KB Output is correct
9 Correct 36 ms 608 KB Output is correct
10 Correct 32 ms 704 KB Output is correct
11 Correct 25 ms 452 KB Output is correct
12 Correct 16 ms 604 KB Output is correct
13 Correct 22 ms 728 KB Output is correct
14 Correct 30 ms 856 KB Output is correct
15 Correct 34 ms 688 KB Output is correct
16 Correct 32 ms 512 KB Output is correct
17 Correct 26 ms 592 KB Output is correct
18 Correct 38 ms 704 KB Output is correct
19 Correct 33 ms 344 KB Output is correct
20 Correct 31 ms 968 KB Output is correct
21 Correct 29 ms 708 KB Output is correct
22 Correct 25 ms 708 KB Output is correct
23 Correct 24 ms 340 KB Output is correct
24 Correct 24 ms 712 KB Output is correct
25 Correct 12 ms 704 KB Output is correct
26 Correct 11 ms 700 KB Output is correct
27 Correct 34 ms 468 KB Output is correct
28 Correct 32 ms 720 KB Output is correct
29 Correct 25 ms 600 KB Output is correct
30 Correct 41 ms 476 KB Output is correct
31 Correct 26 ms 600 KB Output is correct
32 Correct 30 ms 460 KB Output is correct
33 Correct 30 ms 464 KB Output is correct
34 Correct 36 ms 592 KB Output is correct
35 Correct 37 ms 468 KB Output is correct
36 Correct 37 ms 600 KB Output is correct
37 Correct 25 ms 716 KB Output is correct
38 Correct 30 ms 856 KB Output is correct
39 Correct 23 ms 452 KB Output is correct
40 Correct 30 ms 848 KB Output is correct
41 Correct 37 ms 616 KB Output is correct
42 Correct 22 ms 344 KB Output is correct
43 Correct 6 ms 452 KB Output is correct
44 Correct 18 ms 732 KB Output is correct
45 Correct 31 ms 464 KB Output is correct
46 Correct 15 ms 452 KB Output is correct
47 Correct 17 ms 600 KB Output is correct
48 Correct 13 ms 600 KB Output is correct