oj.uz

Submission #1065242

# Submission time Handle Problem Language Result Execution time Memory
1065242 2024-08-19T04:10:22 Z cjoa Rarest Insects (IOI22_insects) C++17
100 / 100
 52 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);
   shuffle(order.begin(), order.end(), gen);
   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 0 ms 344 KB Output is correct
4 Correct 1 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 3 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 4 ms 344 KB Output is correct
13 Correct 2 ms 344 KB Output is correct
14 Correct 2 ms 344 KB Output is correct
15 Correct 2 ms 344 KB Output is correct
16 Correct 3 ms 344 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 344 KB Output is correct
20 Correct 3 ms 436 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 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 1 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 3 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 4 ms 344 KB Output is correct
13 Correct 2 ms 344 KB Output is correct
14 Correct 2 ms 344 KB Output is correct
15 Correct 2 ms 344 KB Output is correct
16 Correct 3 ms 344 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 344 KB Output is correct
20 Correct 3 ms 436 KB Output is correct
21 Correct 1 ms 344 KB Output is correct
22 Correct 1 ms 344 KB Output is correct
23 Correct 17 ms 424 KB Output is correct
24 Correct 5 ms 344 KB Output is correct
25 Correct 10 ms 448 KB Output is correct
26 Correct 14 ms 440 KB Output is correct
27 Correct 9 ms 344 KB Output is correct
28 Correct 5 ms 344 KB Output is correct
29 Correct 11 ms 448 KB Output is correct
30 Correct 23 ms 344 KB Output is correct
31 Correct 15 ms 344 KB Output is correct
32 Correct 12 ms 344 KB Output is correct
33 Correct 12 ms 448 KB Output is correct
34 Correct 14 ms 444 KB Output is correct
35 Correct 9 ms 344 KB Output is correct
36 Correct 12 ms 344 KB Output is correct
37 Correct 13 ms 444 KB Output is correct
38 Correct 15 ms 344 KB Output is correct
39 Correct 10 ms 444 KB Output is correct
40 Correct 7 ms 448 KB Output is correct
41 Correct 4 ms 344 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 0 ms 344 KB Output is correct
3 Correct 0 ms 344 KB Output is correct
4 Correct 1 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 20 ms 592 KB Output is correct
8 Correct 9 ms 344 KB Output is correct
9 Correct 17 ms 344 KB Output is correct
10 Correct 26 ms 444 KB Output is correct
11 Correct 35 ms 592 KB Output is correct
12 Correct 10 ms 344 KB Output is correct
13 Correct 41 ms 444 KB Output is correct
14 Correct 24 ms 344 KB Output is correct
15 Correct 28 ms 600 KB Output is correct
16 Correct 22 ms 344 KB Output is correct
17 Correct 29 ms 432 KB Output is correct
18 Correct 19 ms 344 KB Output is correct
19 Correct 18 ms 448 KB Output is correct
20 Correct 25 ms 344 KB Output is correct
21 Correct 30 ms 460 KB Output is correct
22 Correct 29 ms 344 KB Output is correct
23 Correct 35 ms 428 KB Output is correct
24 Correct 33 ms 344 KB Output is correct
25 Correct 15 ms 452 KB Output is correct
26 Correct 8 ms 344 KB Output is correct
27 Correct 25 ms 600 KB Output is correct
28 Correct 24 ms 592 KB Output is correct
29 Correct 28 ms 592 KB Output is correct
30 Correct 26 ms 600 KB Output is correct
31 Correct 26 ms 344 KB Output is correct
32 Correct 27 ms 452 KB Output is correct
33 Correct 43 ms 344 KB Output is correct
34 Correct 52 ms 456 KB Output is correct
35 Correct 20 ms 344 KB Output is correct
36 Correct 22 ms 600 KB Output is correct
37 Correct 21 ms 592 KB Output is correct
38 Correct 24 ms 344 KB Output is correct
39 Correct 35 ms 344 KB Output is correct
40 Correct 18 ms 344 KB Output is correct
41 Correct 18 ms 344 KB Output is correct
42 Correct 23 ms 344 KB Output is correct
43 Correct 6 ms 344 KB Output is correct
44 Correct 23 ms 452 KB Output is correct
45 Correct 20 ms 344 KB Output is correct
46 Correct 10 ms 344 KB Output is correct
47 Correct 10 ms 344 KB Output is correct
48 Correct 16 ms 436 KB Output is correct