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Submission #1075191

# Submission time Handle Problem Language Result Execution time Memory
1075191 2024-08-25T19:33:36 Z Zicrus Rarest Insects (IOI22_insects) C++17
65.39 / 100
 94 ms 836 KB 
#include <bits/stdc++.h>
#include "insects.h"
using namespace std;
 
typedef long long ll;
 
int n;
vector<bool> in;
unordered_set<int> s;
int cnt;
 
int add(int i) {
    if (in[i]) return 0;
    move_inside(i);
    cnt++;
    in[i] = true;
    return 1;
}
 
int remove(int i) {
    if (!in[i]) return 0;
    move_outside(i);
    cnt--;
    in[i] = false;
    return 1;
}
 
int min_cardinality(int N) {
    n = N;
    cnt = 0;
    mt19937 mt(time(0));
    in = vector<bool>(n);
    for (int i = 0; i < n; i++) {
        add(i);
    }
    int mx = press_button();
    int prevSz = cnt;
    while (mx > 1) {
        int cur = mx;
        while (cur == mx) {
            int i = mt()%n;
            while (!remove(i)) i = mt()%n;
            int j = mt()%n;
            while (!remove(j)) j = mt()%n;
            cur = press_button();
            if (cur == mx) {
                s.insert(i);
                s.insert(j);
            }
            else {
                add(j);
                cur = press_button();
                if (cur == mx) {
                    s.insert(i);
                    remove(j);
                }
                cur = mx-1;
            }
        }
        vector<int> s0;
        for (auto &e : s) {
            s0.push_back(e);
        }
        shuffle(s0.begin(), s0.end(), mt);
        for (int i = 0; i < s0.size(); i++) {
            if (i == s0.size()-1) {
                if (add(s0[i])) {
                    cur = press_button();
                    if (cur == mx) remove(s0[i]);
                }
                continue;
            }

            add(s0[i]);
            add(s0[i+1]);
            cur = press_button();
            if (cur == mx) {
                remove(s0[i+1]);
                cur = press_button();
                if (cur == mx) {
                    remove(s0[i]);
                }
                else {
                    i++;
                }
            }
        }
        if (cnt * mx % (mx-1) == 0 && cnt * mx / (mx-1) == prevSz) {
            break;
        }
        s.clear();
        prevSz = cnt;
        mx--;
    }
    return mx;
} 
 
#ifdef TEST
#include "grader.cpp"
#endif

Compilation message

insects.cpp: In function 'int min_cardinality(int)':
insects.cpp:65:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   65 |         for (int i = 0; i < s0.size(); i++) {
      |                         ~~^~~~~~~~~~~
insects.cpp:66:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   66 |             if (i == s0.size()-1) {
      |                 ~~^~~~~~~~~~~~~~

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 0 ms 344 KB Output is correct
7 Correct 0 ms 344 KB Output is correct
8 Correct 1 ms 344 KB Output is correct
9 Correct 4 ms 344 KB Output is correct
10 Correct 3 ms 344 KB Output is correct
11 Correct 4 ms 344 KB Output is correct
12 Correct 2 ms 344 KB Output is correct
13 Correct 5 ms 440 KB Output is correct
14 Correct 1 ms 344 KB Output is correct
15 Correct 1 ms 344 KB Output is correct
16 Correct 2 ms 412 KB Output is correct
17 Correct 2 ms 344 KB Output is correct
18 Correct 5 ms 344 KB Output is correct
19 Correct 4 ms 344 KB Output is correct
20 Correct 4 ms 600 KB Output is correct
21 Correct 4 ms 444 KB Output is correct
22 Correct 2 ms 692 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 0 ms 344 KB Output is correct
7 Correct 0 ms 344 KB Output is correct
8 Correct 1 ms 344 KB Output is correct
9 Correct 4 ms 344 KB Output is correct
10 Correct 3 ms 344 KB Output is correct
11 Correct 4 ms 344 KB Output is correct
12 Correct 2 ms 344 KB Output is correct
13 Correct 5 ms 440 KB Output is correct
14 Correct 1 ms 344 KB Output is correct
15 Correct 1 ms 344 KB Output is correct
16 Correct 2 ms 412 KB Output is correct
17 Correct 2 ms 344 KB Output is correct
18 Correct 5 ms 344 KB Output is correct
19 Correct 4 ms 344 KB Output is correct
20 Correct 4 ms 600 KB Output is correct
21 Correct 4 ms 444 KB Output is correct
22 Correct 2 ms 692 KB Output is correct
23 Correct 1 ms 344 KB Output is correct
24 Correct 0 ms 344 KB Output is correct
25 Correct 2 ms 344 KB Output is correct
26 Correct 18 ms 344 KB Output is correct
27 Correct 15 ms 344 KB Output is correct
28 Correct 27 ms 436 KB Output is correct
29 Correct 20 ms 340 KB Output is correct
30 Correct 29 ms 344 KB Output is correct
31 Correct 3 ms 344 KB Output is correct
32 Correct 3 ms 344 KB Output is correct
33 Correct 7 ms 668 KB Output is correct
34 Correct 4 ms 344 KB Output is correct
35 Correct 4 ms 440 KB Output is correct
36 Correct 13 ms 344 KB Output is correct
37 Correct 15 ms 344 KB Output is correct
38 Correct 33 ms 344 KB Output is correct
39 Correct 32 ms 344 KB Output is correct
40 Correct 36 ms 452 KB Output is correct
41 Correct 25 ms 472 KB Output is correct

Subtask #3
40.39 / 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 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 0 ms 344 KB Output is correct
7 Correct 1 ms 344 KB Output is correct
8 Correct 1 ms 344 KB Output is correct
9 Correct 3 ms 344 KB Output is correct
10 Partially correct 49 ms 344 KB Output is partially correct
11 Correct 14 ms 344 KB Output is correct
12 Partially correct 58 ms 684 KB Output is partially correct
13 Partially correct 43 ms 344 KB Output is partially correct
14 Partially correct 87 ms 444 KB Output is partially correct
15 Correct 2 ms 344 KB Output is correct
16 Correct 4 ms 344 KB Output is correct
17 Correct 9 ms 344 KB Output is correct
18 Correct 12 ms 344 KB Output is correct
19 Correct 11 ms 436 KB Output is correct
20 Correct 10 ms 344 KB Output is correct
21 Partially correct 43 ms 440 KB Output is partially correct
22 Partially correct 55 ms 432 KB Output is partially correct
23 Partially correct 72 ms 700 KB Output is partially correct
24 Partially correct 94 ms 476 KB Output is partially correct
25 Partially correct 74 ms 836 KB Output is partially correct
26 Partially correct 49 ms 496 KB Output is partially correct
27 Correct 6 ms 344 KB Output is correct
28 Correct 6 ms 344 KB Output is correct
29 Correct 2 ms 356 KB Output is correct
30 Correct 4 ms 344 KB Output is correct
31 Partially correct 33 ms 440 KB Output is partially correct
32 Partially correct 50 ms 584 KB Output is partially correct
33 Partially correct 77 ms 344 KB Output is partially correct
34 Partially correct 80 ms 344 KB Output is partially correct
35 Correct 9 ms 440 KB Output is correct
36 Correct 7 ms 344 KB Output is correct
37 Partially correct 40 ms 344 KB Output is partially correct
38 Partially correct 41 ms 708 KB Output is partially correct
39 Correct 9 ms 344 KB Output is correct
40 Correct 7 ms 344 KB Output is correct
41 Correct 6 ms 344 KB Output is correct
42 Correct 7 ms 344 KB Output is correct
43 Correct 7 ms 344 KB Output is correct
44 Correct 24 ms 344 KB Output is correct
45 Correct 1 ms 344 KB Output is correct
46 Partially correct 63 ms 428 KB Output is partially correct
47 Partially correct 57 ms 580 KB Output is partially correct
48 Partially correct 79 ms 412 KB Output is partially correct