oj.uz

Submission #944752

# Submission time Handle Problem Language Result Execution time Memory
944752 2024-03-13T04:22:51 Z nguyentunglam Rarest Insects (IOI22_insects) C++17
100 / 100
 47 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 <= 75 ? (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 364 KB Output is correct
2 Correct 1 ms 344 KB Output is correct
3 Correct 1 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 672 KB Output is correct
7 Correct 1 ms 344 KB Output is correct
8 Correct 3 ms 344 KB Output is correct
9 Correct 4 ms 444 KB Output is correct
10 Correct 3 ms 344 KB Output is correct
11 Correct 1 ms 344 KB Output is correct
12 Correct 4 ms 444 KB Output is correct
13 Correct 3 ms 344 KB Output is correct
14 Correct 4 ms 444 KB Output is correct
15 Correct 2 ms 344 KB Output is correct
16 Correct 3 ms 344 KB Output is correct
17 Correct 3 ms 344 KB Output is correct
18 Correct 2 ms 344 KB Output is correct
19 Correct 3 ms 344 KB Output is correct
20 Correct 3 ms 600 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 364 KB Output is correct
2 Correct 1 ms 344 KB Output is correct
3 Correct 1 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 672 KB Output is correct
7 Correct 1 ms 344 KB Output is correct
8 Correct 3 ms 344 KB Output is correct
9 Correct 4 ms 444 KB Output is correct
10 Correct 3 ms 344 KB Output is correct
11 Correct 1 ms 344 KB Output is correct
12 Correct 4 ms 444 KB Output is correct
13 Correct 3 ms 344 KB Output is correct
14 Correct 4 ms 444 KB Output is correct
15 Correct 2 ms 344 KB Output is correct
16 Correct 3 ms 344 KB Output is correct
17 Correct 3 ms 344 KB Output is correct
18 Correct 2 ms 344 KB Output is correct
19 Correct 3 ms 344 KB Output is correct
20 Correct 3 ms 600 KB Output is correct
21 Correct 1 ms 344 KB Output is correct
22 Correct 1 ms 344 KB Output is correct
23 Correct 13 ms 344 KB Output is correct
24 Correct 6 ms 344 KB Output is correct
25 Correct 12 ms 700 KB Output is correct
26 Correct 15 ms 444 KB Output is correct
27 Correct 11 ms 600 KB Output is correct
28 Correct 5 ms 600 KB Output is correct
29 Correct 13 ms 856 KB Output is correct
30 Correct 14 ms 600 KB Output is correct
31 Correct 16 ms 604 KB Output is correct
32 Correct 14 ms 604 KB Output is correct
33 Correct 16 ms 444 KB Output is correct
34 Correct 13 ms 600 KB Output is correct
35 Correct 13 ms 604 KB Output is correct
36 Correct 13 ms 604 KB Output is correct
37 Correct 13 ms 600 KB Output is correct
38 Correct 12 ms 704 KB Output is correct
39 Correct 13 ms 600 KB Output is correct
40 Correct 7 ms 704 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 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 1 ms 416 KB Output is correct
5 Correct 0 ms 344 KB Output is correct
6 Correct 1 ms 344 KB Output is correct
7 Correct 31 ms 600 KB Output is correct
8 Correct 9 ms 444 KB Output is correct
9 Correct 28 ms 952 KB Output is correct
10 Correct 27 ms 856 KB Output is correct
11 Correct 27 ms 700 KB Output is correct
12 Correct 12 ms 700 KB Output is correct
13 Correct 26 ms 604 KB Output is correct
14 Correct 30 ms 684 KB Output is correct
15 Correct 32 ms 956 KB Output is correct
16 Correct 47 ms 344 KB Output is correct
17 Correct 30 ms 604 KB Output is correct
18 Correct 27 ms 1112 KB Output is correct
19 Correct 25 ms 964 KB Output is correct
20 Correct 35 ms 856 KB Output is correct
21 Correct 31 ms 684 KB Output is correct
22 Correct 24 ms 1104 KB Output is correct
23 Correct 28 ms 848 KB Output is correct
24 Correct 25 ms 856 KB Output is correct
25 Correct 14 ms 932 KB Output is correct
26 Correct 8 ms 856 KB Output is correct
27 Correct 28 ms 868 KB Output is correct
28 Correct 27 ms 700 KB Output is correct
29 Correct 27 ms 1104 KB Output is correct
30 Correct 23 ms 708 KB Output is correct
31 Correct 26 ms 860 KB Output is correct
32 Correct 25 ms 932 KB Output is correct
33 Correct 32 ms 676 KB Output is correct
34 Correct 27 ms 860 KB Output is correct
35 Correct 29 ms 856 KB Output is correct
36 Correct 26 ms 1104 KB Output is correct
37 Correct 30 ms 448 KB Output is correct
38 Correct 29 ms 452 KB Output is correct
39 Correct 31 ms 856 KB Output is correct
40 Correct 29 ms 608 KB Output is correct
41 Correct 32 ms 608 KB Output is correct
42 Correct 23 ms 856 KB Output is correct
43 Correct 7 ms 596 KB Output is correct
44 Correct 23 ms 692 KB Output is correct
45 Correct 29 ms 1112 KB Output is correct
46 Correct 14 ms 1100 KB Output is correct
47 Correct 17 ms 452 KB Output is correct
48 Correct 14 ms 448 KB Output is correct