Submission #627230

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
627230	2022-08-12T11:36:58 Z	model_code	Rarest Insects (IOI22_insects)	C++17	99.89 / 100	115 ms	428 KB

insects

// correct/solution-hocky-blacklist-binser.cpp
#include "insects.h"

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

int min_cardinality(int N) {

  vector<int> device;
  vector<int> checking_set;

  for (int i = 0; i < N; i++) {
    move_inside(i);
    int max_occurrence = press_button();
    if (max_occurrence == 2) {
      move_outside(i);
      checking_set.push_back(i);
    } else {
      device.push_back(i);
    }
  }

  int distinct = device.size();
  auto get_bounds = [&](int device_size, int checking_size) -> pair<int, int> {
    return {device_size / distinct, (device_size + checking_size) / distinct};
  };

  vector <int> blacklist(N);
  pair<int, int> bounds = get_bounds(device.size(), checking_set.size());

  vector<pair<int, int>> just_moved;
  do {
    if (bounds.first == bounds.second) {
      return bounds.first;
    }
    assert(bounds.first < bounds.second);
    int middle = (bounds.first + bounds.second + 1) / 2;
    vector<int> next_checking_set;
    for (const auto &insect : checking_set) {
      if(blacklist[insect]) {
        next_checking_set.push_back(insect);
        continue;
      }
      move_inside(insect);
      int max_occurrence = press_button();
      if (max_occurrence > middle) {
        move_outside(insect);
        next_checking_set.push_back(insect);
      } else {
        just_moved.push_back({insect, max_occurrence});
      }
    }
    if ((int) just_moved.size() + (int) device.size() == distinct * middle) {
      // Increase the lower bound
      for (const auto &insect : just_moved) {
        device.push_back(insect.first);
      }
      swap(checking_set, next_checking_set);
      bounds = get_bounds(device.size(), checking_set.size());
      just_moved.clear();
      blacklist.assign(N, 0);
    } else {

      // Decrease the upper bound
      bounds = get_bounds(device.size(), just_moved.size());
      if (bounds.first < bounds.second) {
        checking_set.clear();
        int next_middle = (bounds.first + bounds.second + 1) / 2;
        int pushed = 0;
        for (int i = 0; i < (int) just_moved.size(); i++) {
          const auto &insect = just_moved[i];
          if (insect.second <= next_middle) {
            pushed++;
          } else {
            if(i > 0 && just_moved[i - 1].second < just_moved[i].second) blacklist[insect.first] = 1;
            move_outside(insect.first);
            checking_set.push_back(insect.first);
          }
        }
        just_moved.resize(pushed);
      } else {
        return bounds.first;
      }
    }
  } while (true);

  return 0;
}

Subtask #1

10.0 / 10.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	0 ms	208 KB	Output is correct
2	Correct	0 ms	208 KB	Output is correct
3	Correct	0 ms	208 KB	Output is correct
4	Correct	1 ms	208 KB	Output is correct
5	Correct	0 ms	208 KB	Output is correct
6	Correct	9 ms	300 KB	Output is correct
7	Correct	2 ms	296 KB	Output is correct
8	Correct	4 ms	208 KB	Output is correct
9	Correct	7 ms	256 KB	Output is correct
10	Correct	5 ms	212 KB	Output is correct
11	Correct	2 ms	300 KB	Output is correct
12	Correct	8 ms	296 KB	Output is correct
13	Correct	9 ms	208 KB	Output is correct
14	Correct	9 ms	256 KB	Output is correct
15	Correct	4 ms	296 KB	Output is correct
16	Correct	5 ms	208 KB	Output is correct
17	Correct	6 ms	208 KB	Output is correct
18	Correct	6 ms	208 KB	Output is correct
19	Correct	5 ms	208 KB	Output is correct
20	Correct	5 ms	208 KB	Output is correct
21	Correct	5 ms	208 KB	Output is correct
22	Correct	2 ms	208 KB	Output is correct

Subtask #2

15.0 / 15.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	0 ms	208 KB	Output is correct
2	Correct	0 ms	208 KB	Output is correct
3	Correct	0 ms	208 KB	Output is correct
4	Correct	1 ms	208 KB	Output is correct
5	Correct	0 ms	208 KB	Output is correct
6	Correct	9 ms	300 KB	Output is correct
7	Correct	2 ms	296 KB	Output is correct
8	Correct	4 ms	208 KB	Output is correct
9	Correct	7 ms	256 KB	Output is correct
10	Correct	5 ms	212 KB	Output is correct
11	Correct	2 ms	300 KB	Output is correct
12	Correct	8 ms	296 KB	Output is correct
13	Correct	9 ms	208 KB	Output is correct
14	Correct	9 ms	256 KB	Output is correct
15	Correct	4 ms	296 KB	Output is correct
16	Correct	5 ms	208 KB	Output is correct
17	Correct	6 ms	208 KB	Output is correct
18	Correct	6 ms	208 KB	Output is correct
19	Correct	5 ms	208 KB	Output is correct
20	Correct	5 ms	208 KB	Output is correct
21	Correct	5 ms	208 KB	Output is correct
22	Correct	2 ms	208 KB	Output is correct
23	Correct	22 ms	348 KB	Output is correct
24	Correct	9 ms	292 KB	Output is correct
25	Correct	34 ms	304 KB	Output is correct
26	Correct	28 ms	300 KB	Output is correct
27	Correct	33 ms	304 KB	Output is correct
28	Correct	10 ms	360 KB	Output is correct
29	Correct	12 ms	312 KB	Output is correct
30	Correct	38 ms	284 KB	Output is correct
31	Correct	33 ms	300 KB	Output is correct
32	Correct	32 ms	296 KB	Output is correct
33	Correct	37 ms	336 KB	Output is correct
34	Correct	13 ms	308 KB	Output is correct
35	Correct	30 ms	300 KB	Output is correct
36	Correct	26 ms	300 KB	Output is correct
37	Correct	18 ms	308 KB	Output is correct
38	Correct	18 ms	304 KB	Output is correct
39	Correct	29 ms	208 KB	Output is correct
40	Correct	12 ms	300 KB	Output is correct
41	Correct	13 ms	296 KB	Output is correct

Subtask #3

74.89 / 75.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	1 ms	208 KB	Output is correct
2	Correct	0 ms	208 KB	Output is correct
3	Correct	1 ms	224 KB	Output is correct
4	Correct	0 ms	208 KB	Output is correct
5	Correct	1 ms	208 KB	Output is correct
6	Correct	1 ms	208 KB	Output is correct
7	Correct	27 ms	304 KB	Output is correct
8	Correct	35 ms	292 KB	Output is correct
9	Correct	48 ms	308 KB	Output is correct
10	Correct	40 ms	312 KB	Output is correct
11	Correct	24 ms	308 KB	Output is correct
12	Correct	24 ms	304 KB	Output is correct
13	Correct	38 ms	300 KB	Output is correct
14	Correct	43 ms	284 KB	Output is correct
15	Correct	84 ms	316 KB	Output is correct
16	Correct	115 ms	300 KB	Output is correct
17	Correct	63 ms	308 KB	Output is correct
18	Correct	49 ms	316 KB	Output is correct
19	Correct	32 ms	312 KB	Output is correct
20	Correct	79 ms	316 KB	Output is correct
21	Correct	69 ms	308 KB	Output is correct
22	Correct	54 ms	312 KB	Output is correct
23	Correct	43 ms	296 KB	Output is correct
24	Correct	36 ms	304 KB	Output is correct
25	Correct	30 ms	308 KB	Output is correct
26	Correct	22 ms	304 KB	Output is correct
27	Correct	34 ms	296 KB	Output is correct
28	Correct	48 ms	308 KB	Output is correct
29	Partially correct	41 ms	312 KB	Output is partially correct
30	Partially correct	43 ms	308 KB	Output is partially correct
31	Correct	51 ms	312 KB	Output is correct
32	Correct	43 ms	308 KB	Output is correct
33	Correct	39 ms	304 KB	Output is correct
34	Correct	60 ms	308 KB	Output is correct
35	Partially correct	34 ms	304 KB	Output is partially correct
36	Partially correct	65 ms	356 KB	Output is partially correct
37	Correct	76 ms	312 KB	Output is correct
38	Correct	46 ms	312 KB	Output is correct
39	Correct	49 ms	308 KB	Output is correct
40	Correct	57 ms	312 KB	Output is correct
41	Partially correct	43 ms	428 KB	Output is partially correct
42	Partially correct	45 ms	356 KB	Output is partially correct
43	Correct	12 ms	304 KB	Output is correct
44	Correct	40 ms	328 KB	Output is correct
45	Correct	70 ms	280 KB	Output is correct
46	Correct	26 ms	296 KB	Output is correct
47	Correct	21 ms	308 KB	Output is correct
48	Correct	35 ms	308 KB	Output is correct