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Submission #659916

# Submission time Handle Problem Language Result Execution time Memory
659916 2022-11-19T17:15:06 Z peijar Rarest Insects (IOI22_insects) C++17
100 / 100
 58 ms 436 KB 
#include "insects.h"
#include <bits/stdc++.h>
using namespace std;

mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
int randint(int lb, int ub) {
  return uniform_int_distribution<int>(lb, ub)(rng);
}

int min_cardinality(int N) {
  vector<int> roots;
  int nbCC = 0;
  for (int i = 0; i < N; ++i) {
    move_inside(i);
    if (i and press_button() == 2)
      move_outside(i);
    else
      roots.push_back(i), nbCC++;
  }
  vector<bool> isRoot(N);
  for (int r : roots)
    isRoot[r] = true;
  vector<int> toProcess;
  for (int i = 0; i < N; ++i)
    if (!isRoot[i])
      toProcess.push_back(i);
  if (nbCC == 1)
    return N;

  shuffle(toProcess.begin(), toProcess.end(), rng);
  set<int> inside(roots.begin(), roots.end());

  int lo = 1, up = N / nbCC;
  while (lo < up) {
    int mid = (lo + up + 1) / 2;
    vector<int> popped;
    vector<int> insideMachine;
    vector<int> notProcessed;
    for (int u : toProcess) {
      if ((int)inside.size() == nbCC * mid) {
        popped.push_back(u);
      } else {
        move_inside(u);
        inside.insert(u);
        if (press_button() > mid)
          popped.push_back(u), move_outside(u), inside.erase(u);
        else
          insideMachine.push_back(u);
      }
    }
    if ((int)popped.size() == N - mid * nbCC) {
      toProcess = popped;
      lo = mid;
    } else {
      for (int u : insideMachine)
        move_outside(u), inside.erase(u);
      toProcess = insideMachine;
      for (int x : notProcessed)
        toProcess.push_back(x);
      N = toProcess.size() + inside.size();
      up = mid - 1;
    }
  }
  return lo;
}

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 1 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 2 ms 208 KB Output is correct
7 Correct 2 ms 208 KB Output is correct
8 Correct 5 ms 208 KB Output is correct
9 Correct 6 ms 208 KB Output is correct
10 Correct 6 ms 308 KB Output is correct
11 Correct 2 ms 308 KB Output is correct
12 Correct 5 ms 208 KB Output is correct
13 Correct 5 ms 208 KB Output is correct
14 Correct 3 ms 208 KB Output is correct
15 Correct 4 ms 292 KB Output is correct
16 Correct 6 ms 308 KB Output is correct
17 Correct 6 ms 208 KB Output is correct
18 Correct 7 ms 208 KB Output is correct
19 Correct 5 ms 208 KB Output is correct
20 Correct 4 ms 300 KB Output is correct
21 Correct 3 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 1 ms 208 KB Output is correct
2 Correct 1 ms 208 KB Output is correct
3 Correct 1 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 2 ms 208 KB Output is correct
7 Correct 2 ms 208 KB Output is correct
8 Correct 5 ms 208 KB Output is correct
9 Correct 6 ms 208 KB Output is correct
10 Correct 6 ms 308 KB Output is correct
11 Correct 2 ms 308 KB Output is correct
12 Correct 5 ms 208 KB Output is correct
13 Correct 5 ms 208 KB Output is correct
14 Correct 3 ms 208 KB Output is correct
15 Correct 4 ms 292 KB Output is correct
16 Correct 6 ms 308 KB Output is correct
17 Correct 6 ms 208 KB Output is correct
18 Correct 7 ms 208 KB Output is correct
19 Correct 5 ms 208 KB Output is correct
20 Correct 4 ms 300 KB Output is correct
21 Correct 3 ms 208 KB Output is correct
22 Correct 2 ms 208 KB Output is correct
23 Correct 7 ms 208 KB Output is correct
24 Correct 11 ms 336 KB Output is correct
25 Correct 17 ms 300 KB Output is correct
26 Correct 29 ms 296 KB Output is correct
27 Correct 20 ms 208 KB Output is correct
28 Correct 7 ms 312 KB Output is correct
29 Correct 21 ms 316 KB Output is correct
30 Correct 19 ms 316 KB Output is correct
31 Correct 18 ms 308 KB Output is correct
32 Correct 20 ms 328 KB Output is correct
33 Correct 19 ms 296 KB Output is correct
34 Correct 19 ms 304 KB Output is correct
35 Correct 19 ms 312 KB Output is correct
36 Correct 19 ms 344 KB Output is correct
37 Correct 28 ms 296 KB Output is correct
38 Correct 17 ms 292 KB Output is correct
39 Correct 20 ms 316 KB Output is correct
40 Correct 17 ms 300 KB Output is correct
41 Correct 11 ms 308 KB Output is correct

Subtask #3
75.0 / 75.0

# 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 0 ms 208 KB Output is correct
5 Correct 1 ms 208 KB Output is correct
6 Correct 0 ms 208 KB Output is correct
7 Correct 21 ms 284 KB Output is correct
8 Correct 16 ms 304 KB Output is correct
9 Correct 48 ms 328 KB Output is correct
10 Correct 50 ms 348 KB Output is correct
11 Correct 48 ms 424 KB Output is correct
12 Correct 30 ms 288 KB Output is correct
13 Correct 56 ms 352 KB Output is correct
14 Correct 58 ms 300 KB Output is correct
15 Correct 35 ms 296 KB Output is correct
16 Correct 34 ms 284 KB Output is correct
17 Correct 37 ms 300 KB Output is correct
18 Correct 36 ms 284 KB Output is correct
19 Correct 30 ms 420 KB Output is correct
20 Correct 37 ms 376 KB Output is correct
21 Correct 58 ms 292 KB Output is correct
22 Correct 47 ms 292 KB Output is correct
23 Correct 24 ms 284 KB Output is correct
24 Correct 43 ms 288 KB Output is correct
25 Correct 27 ms 352 KB Output is correct
26 Correct 16 ms 300 KB Output is correct
27 Correct 42 ms 340 KB Output is correct
28 Correct 38 ms 316 KB Output is correct
29 Correct 53 ms 292 KB Output is correct
30 Correct 48 ms 296 KB Output is correct
31 Correct 58 ms 296 KB Output is correct
32 Correct 42 ms 428 KB Output is correct
33 Correct 54 ms 412 KB Output is correct
34 Correct 52 ms 416 KB Output is correct
35 Correct 42 ms 284 KB Output is correct
36 Correct 27 ms 328 KB Output is correct
37 Correct 46 ms 284 KB Output is correct
38 Correct 38 ms 356 KB Output is correct
39 Correct 43 ms 340 KB Output is correct
40 Correct 36 ms 296 KB Output is correct
41 Correct 48 ms 436 KB Output is correct
42 Correct 43 ms 320 KB Output is correct
43 Correct 12 ms 304 KB Output is correct
44 Correct 24 ms 328 KB Output is correct
45 Correct 31 ms 280 KB Output is correct
46 Correct 25 ms 328 KB Output is correct
47 Correct 18 ms 308 KB Output is correct
48 Correct 33 ms 340 KB Output is correct