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Submission #643679

# Submission time Handle Problem Language Result Execution time Memory
643679 2022-09-22T18:36:49 Z Vanilla Rarest Insects (IOI22_insects) C++17
100 / 100
 61 ms 328 KB 
#include <bits/stdc++.h>
#include "insects.h"
using namespace std;

int min_cardinality(int n) {
  unsigned seed = std::chrono::system_clock::now().time_since_epoch().count();
  std::default_random_engine rng(seed);
  vector <bool> tr (n);
  int tp = 0;
  for (int i = 0; i < n; i++){
    move_inside(i);
    if (press_button() == 2) {
      move_outside(i);
    }
    else {
      tr[i] = 1;
      tp++;
    }
  }
  for (int i = 0; i < n; i++) if (tr[i]) move_outside(i);
  int l = 0, r = n / tp, rs = -1;
  int btn = 0;
  vector <int> in (n);
  vector <int> use (n, 1);
  while (l <= r){
    int mid = (l + r) / 2;
    auto check = [&] (int x) -> bool {
      int ins = btn;
      vector <int> vis (n);
      vector <int> ord (n);
      iota(ord.begin(), ord.end(), 0);
      shuffle(ord.begin(), ord.end(), rng);
      for (int i: ord) {
        if (in[i] || !use[i]) continue;
        move_inside(i);
        if (press_button() > x) {
          move_outside(i);
        }
        else {
          ins++;
          vis[i] = in[i] = 1;
        }
        if (ins == x * tp) {
          btn = ins;
          return 1;
        }
      } 
      if (ins != x * tp) {
        for (int i = 0; i < n; i++) 
          if (vis[i]) {
            use[i] = 1;
            in[i] = 0;
            move_outside(i);
          }
          else {
            use[i] = 0;
          }
        return 0;
      }
      else {
        btn = ins;
        return 1;
      }
    };
    if (check(mid)) {
      rs = mid;
      l = mid + 1;
    }
    else {
      r = mid - 1;
    }
  }
  return rs;
}

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 208 KB Output is correct
2 Correct 1 ms 208 KB Output is correct
3 Correct 0 ms 208 KB Output is correct
4 Correct 0 ms 208 KB Output is correct
5 Correct 1 ms 208 KB Output is correct
6 Correct 4 ms 300 KB Output is correct
7 Correct 5 ms 208 KB Output is correct
8 Correct 5 ms 296 KB Output is correct
9 Correct 6 ms 208 KB Output is correct
10 Correct 5 ms 208 KB Output is correct
11 Correct 4 ms 208 KB Output is correct
12 Correct 7 ms 300 KB Output is correct
13 Correct 5 ms 304 KB Output is correct
14 Correct 5 ms 292 KB Output is correct
15 Correct 6 ms 208 KB Output is correct
16 Correct 4 ms 208 KB Output is correct
17 Correct 7 ms 300 KB Output is correct
18 Correct 6 ms 208 KB Output is correct
19 Correct 7 ms 208 KB Output is correct
20 Correct 4 ms 208 KB Output is correct
21 Correct 4 ms 220 KB Output is correct
22 Correct 4 ms 300 KB Output is correct

Subtask #2
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 208 KB Output is correct
2 Correct 1 ms 208 KB Output is correct
3 Correct 0 ms 208 KB Output is correct
4 Correct 0 ms 208 KB Output is correct
5 Correct 1 ms 208 KB Output is correct
6 Correct 4 ms 300 KB Output is correct
7 Correct 5 ms 208 KB Output is correct
8 Correct 5 ms 296 KB Output is correct
9 Correct 6 ms 208 KB Output is correct
10 Correct 5 ms 208 KB Output is correct
11 Correct 4 ms 208 KB Output is correct
12 Correct 7 ms 300 KB Output is correct
13 Correct 5 ms 304 KB Output is correct
14 Correct 5 ms 292 KB Output is correct
15 Correct 6 ms 208 KB Output is correct
16 Correct 4 ms 208 KB Output is correct
17 Correct 7 ms 300 KB Output is correct
18 Correct 6 ms 208 KB Output is correct
19 Correct 7 ms 208 KB Output is correct
20 Correct 4 ms 208 KB Output is correct
21 Correct 4 ms 220 KB Output is correct
22 Correct 4 ms 300 KB Output is correct
23 Correct 23 ms 300 KB Output is correct
24 Correct 13 ms 292 KB Output is correct
25 Correct 16 ms 208 KB Output is correct
26 Correct 28 ms 292 KB Output is correct
27 Correct 24 ms 288 KB Output is correct
28 Correct 19 ms 288 KB Output is correct
29 Correct 29 ms 208 KB Output is correct
30 Correct 26 ms 208 KB Output is correct
31 Correct 20 ms 208 KB Output is correct
32 Correct 23 ms 292 KB Output is correct
33 Correct 34 ms 276 KB Output is correct
34 Correct 22 ms 208 KB Output is correct
35 Correct 23 ms 288 KB Output is correct
36 Correct 20 ms 280 KB Output is correct
37 Correct 28 ms 292 KB Output is correct
38 Correct 21 ms 288 KB Output is correct
39 Correct 23 ms 296 KB Output is correct
40 Correct 22 ms 276 KB Output is correct
41 Correct 14 ms 276 KB Output is correct

Subtask #3
75.0 / 75.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 256 KB Output is correct
2 Correct 1 ms 208 KB Output is correct
3 Correct 1 ms 208 KB Output is correct
4 Correct 1 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 41 ms 280 KB Output is correct
8 Correct 16 ms 288 KB Output is correct
9 Correct 43 ms 208 KB Output is correct
10 Correct 46 ms 208 KB Output is correct
11 Correct 40 ms 292 KB Output is correct
12 Correct 42 ms 208 KB Output is correct
13 Correct 41 ms 292 KB Output is correct
14 Correct 61 ms 280 KB Output is correct
15 Correct 41 ms 292 KB Output is correct
16 Correct 24 ms 296 KB Output is correct
17 Correct 45 ms 284 KB Output is correct
18 Correct 39 ms 208 KB Output is correct
19 Correct 35 ms 288 KB Output is correct
20 Correct 46 ms 276 KB Output is correct
21 Correct 55 ms 292 KB Output is correct
22 Correct 39 ms 208 KB Output is correct
23 Correct 45 ms 280 KB Output is correct
24 Correct 43 ms 280 KB Output is correct
25 Correct 40 ms 328 KB Output is correct
26 Correct 41 ms 280 KB Output is correct
27 Correct 28 ms 292 KB Output is correct
28 Correct 23 ms 208 KB Output is correct
29 Correct 33 ms 208 KB Output is correct
30 Correct 26 ms 208 KB Output is correct
31 Correct 56 ms 292 KB Output is correct
32 Correct 47 ms 280 KB Output is correct
33 Correct 37 ms 292 KB Output is correct
34 Correct 52 ms 208 KB Output is correct
35 Correct 55 ms 296 KB Output is correct
36 Correct 49 ms 208 KB Output is correct
37 Correct 52 ms 276 KB Output is correct
38 Correct 29 ms 280 KB Output is correct
39 Correct 59 ms 284 KB Output is correct
40 Correct 53 ms 280 KB Output is correct
41 Correct 48 ms 280 KB Output is correct
42 Correct 53 ms 280 KB Output is correct
43 Correct 13 ms 208 KB Output is correct
44 Correct 39 ms 296 KB Output is correct
45 Correct 42 ms 280 KB Output is correct
46 Correct 52 ms 276 KB Output is correct
47 Correct 48 ms 296 KB Output is correct
48 Correct 45 ms 284 KB Output is correct