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Submission #942188

# Submission time Handle Problem Language Result Execution time Memory
942188 2024-03-10T10:37:53 Z benjaminkleyn Rarest Insects (IOI22_insects) C++17
99.83 / 100
 38 ms 1112 KB 
#include <bits/stdc++.h>
#include "insects.h"
using namespace std;

int cnt;
bool inside[2000];
bool bad[2000];

void init()
{
    cnt = 0;
    memset(inside, false, sizeof(inside));
    memset(bad, false, sizeof(bad));
}
void move_in(int i)
{
    if (inside[i])
        return;
    cnt++;
    inside[i] = true;
    move_inside(i);
}
void move_out(int i)
{
    if (!inside[i])
        return;
    cnt--;
    inside[i] = false;
    move_outside(i);
}

int min_cardinality(int N) 
{
    init();
    for (int i = 0; i < N; i++)
    {
        move_in(i);
        if (press_button() > 1)
            move_out(i);
    }
    int num_types = cnt;

    if (num_types == 1)
        return N;
    if (num_types == N)
        return 1;

    mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
    vector<int> p(N);
    iota(p.begin(), p.end(), 0);

    int lo = 1, hi = N / cnt + 1, mid;
    while (lo < hi)
    {
        mid = (lo + hi + 1) / 2;

        shuffle(p.begin(), p.end(), rng);

        vector<int> new_insects;
        vector<int> bad_insects;
        for (int i = 0; i < N; i++)
        {
            if (!(bad[i] || inside[i]))
            {
                move_in(i);

                if (press_button() > mid)
                {
                    bad_insects.push_back(i);
                    move_out(i);
                }
                else
                    new_insects.push_back(i);

                if (cnt >= mid * num_types)
                    break;
            }
        }

        if (cnt == mid * num_types)
            lo = mid;
        else
        {
            for (int i : bad_insects)
                bad[i] = true;
            for (int i : new_insects)
                move_out(i);
            hi = mid - 1;
        }
    }
    return lo;
}

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 0 ms 596 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 1 ms 344 KB Output is correct
7 Correct 1 ms 344 KB Output is correct
8 Correct 3 ms 340 KB Output is correct
9 Correct 4 ms 440 KB Output is correct
10 Correct 4 ms 600 KB Output is correct
11 Correct 2 ms 344 KB Output is correct
12 Correct 3 ms 600 KB Output is correct
13 Correct 3 ms 600 KB Output is correct
14 Correct 3 ms 600 KB Output is correct
15 Correct 2 ms 344 KB Output is correct
16 Correct 2 ms 444 KB Output is correct
17 Correct 3 ms 344 KB Output is correct
18 Correct 3 ms 600 KB Output is correct
19 Correct 2 ms 600 KB Output is correct
20 Correct 2 ms 600 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 1 ms 344 KB Output is correct
2 Correct 0 ms 596 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 1 ms 344 KB Output is correct
7 Correct 1 ms 344 KB Output is correct
8 Correct 3 ms 340 KB Output is correct
9 Correct 4 ms 440 KB Output is correct
10 Correct 4 ms 600 KB Output is correct
11 Correct 2 ms 344 KB Output is correct
12 Correct 3 ms 600 KB Output is correct
13 Correct 3 ms 600 KB Output is correct
14 Correct 3 ms 600 KB Output is correct
15 Correct 2 ms 344 KB Output is correct
16 Correct 2 ms 444 KB Output is correct
17 Correct 3 ms 344 KB Output is correct
18 Correct 3 ms 600 KB Output is correct
19 Correct 2 ms 600 KB Output is correct
20 Correct 2 ms 600 KB Output is correct
21 Correct 2 ms 344 KB Output is correct
22 Correct 1 ms 344 KB Output is correct
23 Correct 4 ms 344 KB Output is correct
24 Correct 4 ms 344 KB Output is correct
25 Correct 13 ms 856 KB Output is correct
26 Correct 13 ms 600 KB Output is correct
27 Correct 12 ms 700 KB Output is correct
28 Correct 7 ms 856 KB Output is correct
29 Correct 12 ms 608 KB Output is correct
30 Correct 12 ms 848 KB Output is correct
31 Correct 11 ms 692 KB Output is correct
32 Correct 11 ms 696 KB Output is correct
33 Correct 14 ms 600 KB Output is correct
34 Correct 9 ms 700 KB Output is correct
35 Correct 11 ms 600 KB Output is correct
36 Correct 12 ms 444 KB Output is correct
37 Correct 15 ms 600 KB Output is correct
38 Correct 13 ms 600 KB Output is correct
39 Correct 12 ms 856 KB Output is correct
40 Correct 8 ms 696 KB Output is correct
41 Correct 8 ms 600 KB Output is correct

Subtask #3
74.83 / 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 340 KB Output is correct
5 Correct 1 ms 344 KB Output is correct
6 Correct 0 ms 344 KB Output is correct
7 Correct 9 ms 344 KB Output is correct
8 Correct 9 ms 344 KB Output is correct
9 Correct 19 ms 692 KB Output is correct
10 Correct 24 ms 700 KB Output is correct
11 Correct 25 ms 1112 KB Output is correct
12 Correct 16 ms 856 KB Output is correct
13 Correct 26 ms 592 KB Output is correct
14 Correct 29 ms 940 KB Output is correct
15 Correct 29 ms 592 KB Output is correct
16 Correct 24 ms 848 KB Output is correct
17 Correct 23 ms 592 KB Output is correct
18 Correct 24 ms 600 KB Output is correct
19 Correct 31 ms 692 KB Output is correct
20 Correct 37 ms 848 KB Output is correct
21 Correct 26 ms 848 KB Output is correct
22 Correct 28 ms 860 KB Output is correct
23 Correct 27 ms 944 KB Output is correct
24 Correct 21 ms 684 KB Output is correct
25 Correct 13 ms 592 KB Output is correct
26 Correct 10 ms 948 KB Output is correct
27 Correct 26 ms 1104 KB Output is correct
28 Correct 15 ms 592 KB Output is correct
29 Correct 27 ms 688 KB Output is correct
30 Correct 24 ms 600 KB Output is correct
31 Correct 22 ms 848 KB Output is correct
32 Partially correct 38 ms 436 KB Output is partially correct
33 Correct 25 ms 1104 KB Output is correct
34 Correct 32 ms 444 KB Output is correct
35 Correct 25 ms 444 KB Output is correct
36 Correct 25 ms 688 KB Output is correct
37 Correct 28 ms 676 KB Output is correct
38 Correct 28 ms 856 KB Output is correct
39 Correct 26 ms 956 KB Output is correct
40 Correct 19 ms 688 KB Output is correct
41 Correct 22 ms 856 KB Output is correct
42 Correct 28 ms 600 KB Output is correct
43 Correct 7 ms 600 KB Output is correct
44 Correct 21 ms 700 KB Output is correct
45 Correct 24 ms 680 KB Output is correct
46 Correct 14 ms 444 KB Output is correct
47 Correct 13 ms 444 KB Output is correct
48 Correct 14 ms 436 KB Output is correct