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Submission #944751

# Submission time Handle Problem Language Result Execution time Memory
944751 2024-03-13T04:22:41 Z nguyentunglam Rarest Insects (IOI22_insects) C++17
100 / 100
 36 ms 1112 KB 
#include "insects.h"
#include<bits/stdc++.h>
using namespace std;

const int NN = 1e5 + 10;

bool in[NN];

mt19937 rng(10184104810471);

int rnd(int l, int r) {
  return l + rng() % (r - l + 1);
}

int min_cardinality(int n) {
  int type = 0;
  vector<int> candidate;
  for(int i = 0; i < n; i++) {
    move_inside(i);
    if (press_button() == 1) {
      ++type;
      in[i] = 1;
    }
    else {
      move_outside(i);
      candidate.push_back(i);
    }
  }

  int l = 2, r = n / type, ans = 1;
  int cur = 1;

  while (l <= r) {
    shuffle(candidate.begin(), candidate.end(), rng);
    int mid = type <= 100 ? (l + r + 1) / 2 : (l + r) / 2;
    assert(cur <= mid);
    int last = cur;
    for(auto &i : candidate) {
      move_inside(i);
      int nxt = press_button();
      if (nxt > mid) {
        move_outside(i);
        in[i] = 0;
      }
      else {
        cur = nxt;
        in[i] = 1;
      }
    }
    int total = 0;
    for(int i = 0; i < n; i++) total += in[i];
    vector<int> _candidate;

    if (cur == mid && mid * type == total) {
      for(auto &i : candidate) if (!in[i]) _candidate.push_back(i);
      l = mid + 1;
      ans = mid;
    }
    else {
      for(auto &i : candidate) if (in[i]) {
        _candidate.push_back(i);
        move_outside(i);
        in[i] = 0;
      }
      r = mid - 1;
      cur = last;
    }
    candidate = _candidate;
  }
  return ans;
}

Subtask #1
10.0 / 10.0

# 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 4 ms 440 KB Output is correct
7 Correct 1 ms 344 KB Output is correct
8 Correct 2 ms 444 KB Output is correct
9 Correct 3 ms 344 KB Output is correct
10 Correct 2 ms 600 KB Output is correct
11 Correct 1 ms 344 KB Output is correct
12 Correct 2 ms 344 KB Output is correct
13 Correct 3 ms 600 KB Output is correct
14 Correct 3 ms 344 KB Output is correct
15 Correct 2 ms 344 KB Output is correct
16 Correct 2 ms 600 KB Output is correct
17 Correct 2 ms 344 KB Output is correct
18 Correct 3 ms 344 KB Output is correct
19 Correct 3 ms 444 KB Output is correct
20 Correct 2 ms 344 KB Output is correct
21 Correct 1 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 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 4 ms 440 KB Output is correct
7 Correct 1 ms 344 KB Output is correct
8 Correct 2 ms 444 KB Output is correct
9 Correct 3 ms 344 KB Output is correct
10 Correct 2 ms 600 KB Output is correct
11 Correct 1 ms 344 KB Output is correct
12 Correct 2 ms 344 KB Output is correct
13 Correct 3 ms 600 KB Output is correct
14 Correct 3 ms 344 KB Output is correct
15 Correct 2 ms 344 KB Output is correct
16 Correct 2 ms 600 KB Output is correct
17 Correct 2 ms 344 KB Output is correct
18 Correct 3 ms 344 KB Output is correct
19 Correct 3 ms 444 KB Output is correct
20 Correct 2 ms 344 KB Output is correct
21 Correct 1 ms 344 KB Output is correct
22 Correct 1 ms 344 KB Output is correct
23 Correct 14 ms 444 KB Output is correct
24 Correct 5 ms 344 KB Output is correct
25 Correct 13 ms 600 KB Output is correct
26 Correct 12 ms 600 KB Output is correct
27 Correct 11 ms 600 KB Output is correct
28 Correct 5 ms 436 KB Output is correct
29 Correct 12 ms 340 KB Output is correct
30 Correct 13 ms 600 KB Output is correct
31 Correct 16 ms 448 KB Output is correct
32 Correct 13 ms 440 KB Output is correct
33 Correct 16 ms 856 KB Output is correct
34 Correct 15 ms 856 KB Output is correct
35 Correct 19 ms 856 KB Output is correct
36 Correct 14 ms 600 KB Output is correct
37 Correct 13 ms 600 KB Output is correct
38 Correct 14 ms 600 KB Output is correct
39 Correct 9 ms 604 KB Output is correct
40 Correct 7 ms 856 KB Output is correct
41 Correct 5 ms 600 KB Output is correct

Subtask #3
75.0 / 75.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 544 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 0 ms 344 KB Output is correct
7 Correct 29 ms 600 KB Output is correct
8 Correct 8 ms 600 KB Output is correct
9 Correct 31 ms 456 KB Output is correct
10 Correct 34 ms 600 KB Output is correct
11 Correct 24 ms 856 KB Output is correct
12 Correct 13 ms 856 KB Output is correct
13 Correct 28 ms 604 KB Output is correct
14 Correct 29 ms 600 KB Output is correct
15 Correct 30 ms 1112 KB Output is correct
16 Correct 26 ms 952 KB Output is correct
17 Correct 24 ms 856 KB Output is correct
18 Correct 24 ms 704 KB Output is correct
19 Correct 35 ms 700 KB Output is correct
20 Correct 30 ms 704 KB Output is correct
21 Correct 33 ms 856 KB Output is correct
22 Correct 32 ms 436 KB Output is correct
23 Correct 33 ms 864 KB Output is correct
24 Correct 25 ms 856 KB Output is correct
25 Correct 18 ms 856 KB Output is correct
26 Correct 10 ms 604 KB Output is correct
27 Correct 33 ms 848 KB Output is correct
28 Correct 36 ms 848 KB Output is correct
29 Correct 32 ms 860 KB Output is correct
30 Correct 34 ms 756 KB Output is correct
31 Correct 28 ms 600 KB Output is correct
32 Correct 30 ms 856 KB Output is correct
33 Correct 33 ms 856 KB Output is correct
34 Correct 28 ms 456 KB Output is correct
35 Correct 33 ms 700 KB Output is correct
36 Correct 27 ms 696 KB Output is correct
37 Correct 28 ms 856 KB Output is correct
38 Correct 26 ms 708 KB Output is correct
39 Correct 26 ms 600 KB Output is correct
40 Correct 25 ms 608 KB Output is correct
41 Correct 25 ms 700 KB Output is correct
42 Correct 29 ms 952 KB Output is correct
43 Correct 6 ms 600 KB Output is correct
44 Correct 23 ms 700 KB Output is correct
45 Correct 31 ms 600 KB Output is correct
46 Correct 16 ms 604 KB Output is correct
47 Correct 16 ms 444 KB Output is correct
48 Correct 15 ms 452 KB Output is correct