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Submission #1065241

# Submission time Handle Problem Language Result Execution time Memory
1065241 2024-08-19T04:09:10 Z cjoa Rarest Insects (IOI22_insects) C++17
99.95 / 100
 47 ms 600 KB 
#include "insects.h"
#include <vector>
#include <algorithm>
#include <cassert>
#include <iostream>
#include <random>

using namespace std;

enum State {
   OUTSIDE, INSIDE, DISCARDED
};


mt19937 gen(1337);

int N, T;
int cnt_inside;
vector<int> state;

void MOVE_IN(int n) {
// cerr << "+ " << n << endl;
   assert(state[n] == OUTSIDE);
   move_inside(n);
   state[n] = INSIDE;
   ++cnt_inside;
}

void MOVE_OUT(int n) {
// cerr << "- " << n << endl;
   assert(state[n] == INSIDE);
   move_outside(n);
   state[n] = OUTSIDE;
   --cnt_inside;
}

bool check(int x) {
   vector<int> order(N);
   iota(order.begin(), order.end(), 0);
   for (int i = 0; i < N and cnt_inside < T * x; ++i) {
      int n = order[i];
      if (state[n] != OUTSIDE)
         continue;
      MOVE_IN(n);
      int f = press_button();
      if (f > x)
         MOVE_OUT(n);
   }

   return cnt_inside == T * x;
}

void RESTORE(const vector<int>& orig_state) {
   for (int n = 0; n < N; ++n) {
      if (state[n] != orig_state[n]) {
         assert(orig_state[n] == OUTSIDE);
         MOVE_OUT(n);
      }
      else if (state[n] == OUTSIDE) {
         state[n] = DISCARDED;
      }
   }
}

int min_cardinality(int _N) {
   N = _N;
   T = _N;
   cnt_inside = 0;
   state.assign(N, OUTSIDE);
   check(1);
   T = cnt_inside;

   int res = 1;
   int lo = 2, hi = N / T;
   while (lo <= hi) {
      int mid = lo + (hi - lo) / 2;
      vector<int> orig_state = state;
      if (check(mid)) {
         lo = mid+1;
         res = mid;
      }
      else {
         hi = mid-1;
         RESTORE(orig_state);
      }
   }

   return res;
}

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 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 2 ms 344 KB Output is correct
7 Correct 1 ms 344 KB Output is correct
8 Correct 2 ms 344 KB Output is correct
9 Correct 3 ms 344 KB Output is correct
10 Correct 2 ms 344 KB Output is correct
11 Correct 1 ms 344 KB Output is correct
12 Correct 2 ms 444 KB Output is correct
13 Correct 3 ms 344 KB Output is correct
14 Correct 3 ms 600 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 3 ms 344 KB Output is correct
19 Correct 3 ms 344 KB Output is correct
20 Correct 2 ms 344 KB Output is correct
21 Correct 2 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 0 ms 344 KB Output is correct
2 Correct 0 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 2 ms 344 KB Output is correct
7 Correct 1 ms 344 KB Output is correct
8 Correct 2 ms 344 KB Output is correct
9 Correct 3 ms 344 KB Output is correct
10 Correct 2 ms 344 KB Output is correct
11 Correct 1 ms 344 KB Output is correct
12 Correct 2 ms 444 KB Output is correct
13 Correct 3 ms 344 KB Output is correct
14 Correct 3 ms 600 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 3 ms 344 KB Output is correct
19 Correct 3 ms 344 KB Output is correct
20 Correct 2 ms 344 KB Output is correct
21 Correct 2 ms 344 KB Output is correct
22 Correct 1 ms 344 KB Output is correct
23 Correct 13 ms 600 KB Output is correct
24 Correct 5 ms 344 KB Output is correct
25 Correct 10 ms 600 KB Output is correct
26 Correct 16 ms 452 KB Output is correct
27 Correct 9 ms 344 KB Output is correct
28 Correct 6 ms 344 KB Output is correct
29 Correct 14 ms 448 KB Output is correct
30 Correct 16 ms 600 KB Output is correct
31 Correct 11 ms 600 KB Output is correct
32 Correct 13 ms 448 KB Output is correct
33 Correct 8 ms 344 KB Output is correct
34 Correct 10 ms 448 KB Output is correct
35 Correct 9 ms 344 KB Output is correct
36 Correct 19 ms 344 KB Output is correct
37 Correct 17 ms 344 KB Output is correct
38 Correct 8 ms 600 KB Output is correct
39 Correct 10 ms 600 KB Output is correct
40 Correct 8 ms 344 KB Output is correct
41 Correct 5 ms 344 KB Output is correct

Subtask #3
74.95 / 75.0

# Verdict Execution time Memory Grader output
1 Correct 0 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 0 ms 344 KB Output is correct
7 Correct 22 ms 456 KB Output is correct
8 Correct 9 ms 344 KB Output is correct
9 Correct 26 ms 596 KB Output is correct
10 Correct 30 ms 344 KB Output is correct
11 Correct 33 ms 456 KB Output is correct
12 Correct 14 ms 600 KB Output is correct
13 Correct 35 ms 344 KB Output is correct
14 Correct 30 ms 448 KB Output is correct
15 Correct 27 ms 344 KB Output is correct
16 Correct 18 ms 592 KB Output is correct
17 Correct 20 ms 344 KB Output is correct
18 Correct 26 ms 344 KB Output is correct
19 Correct 16 ms 460 KB Output is correct
20 Correct 28 ms 344 KB Output is correct
21 Correct 31 ms 592 KB Output is correct
22 Correct 28 ms 344 KB Output is correct
23 Correct 20 ms 344 KB Output is correct
24 Correct 21 ms 344 KB Output is correct
25 Correct 17 ms 448 KB Output is correct
26 Correct 17 ms 344 KB Output is correct
27 Correct 30 ms 452 KB Output is correct
28 Correct 26 ms 592 KB Output is correct
29 Correct 32 ms 460 KB Output is correct
30 Correct 31 ms 344 KB Output is correct
31 Correct 24 ms 344 KB Output is correct
32 Correct 20 ms 592 KB Output is correct
33 Correct 18 ms 600 KB Output is correct
34 Correct 33 ms 452 KB Output is correct
35 Partially correct 42 ms 344 KB Output is partially correct
36 Correct 41 ms 344 KB Output is correct
37 Correct 47 ms 592 KB Output is correct
38 Correct 39 ms 448 KB Output is correct
39 Correct 26 ms 344 KB Output is correct
40 Correct 16 ms 344 KB Output is correct
41 Correct 23 ms 344 KB Output is correct
42 Partially correct 32 ms 432 KB Output is partially correct
43 Correct 4 ms 344 KB Output is correct
44 Correct 16 ms 344 KB Output is correct
45 Correct 12 ms 448 KB Output is correct
46 Correct 12 ms 344 KB Output is correct
47 Correct 16 ms 600 KB Output is correct
48 Correct 17 ms 452 KB Output is correct