Submission #799732

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
799732	2023-07-31T21:34:39 Z	rnl42	Rarest Insects (IOI22_insects)	C++17	99.91 / 100	59 ms	392 KB

insects

#include "insects.h"
#include <vector>
#include <iostream>
#include <random>
#include <algorithm>
#include <numeric>
using namespace std;

int N, W;
vector<bool> deleted;
int remaining;

int get_width() {
    int ret = 0;
    for (int i = 0; i < N; i++) {
        move_inside(i);
        if (press_button() >= 2) {
            move_outside(i);
        } else {
            deleted[i] = true;
            ret++;
        }
    }
    return ret;
}

int min_cardinality(int _N) {
    N = _N;
    deleted.resize(N);
    W = get_width();

    remaining = N-W;
    int mini = 1, maxi = N/W;
    int minh = 1, maxh = N-W+1;
    if (W == 1) mini = N;
    vector<int> order(N);
    mt19937 rng(42);
    while (mini != maxi) {
        int mid = maxi-mini > 5 ? (mini+maxi-1>>1)+rng()%3 : (mini+maxi+1)>>1;
        vector<int> in_machine;
        vector<int> out_machine;
        for (int i = 0; i < N; i++) {
            if (!deleted[i]) {
                move_inside(i);
                if (press_button() > mid) {
                    move_outside(i);
                    out_machine.push_back(i);
                } else {
                    in_machine.push_back(i);
                }
            }
        }
        if ((int)in_machine.size() == W*(mid-minh)) {
            for (int i : in_machine) {
                deleted[i] = true;
                remaining--;
            }
            mini = mid;
            minh = mid;
        } else {
            for (int i : out_machine) {
                deleted[i] = true;
                remaining--;
            }
            for (int i : in_machine) {
                move_outside(i);
            }
            maxi = mid-1;
            maxh = mid;
        }
    }
    return mini;
}

Compilation message

insects.cpp: In function 'int min_cardinality(int)':
insects.cpp:39:45: warning: suggest parentheses around '-' inside '>>' [-Wparentheses]
   39 |         int mid = maxi-mini > 5 ? (mini+maxi-1>>1)+rng()%3 : (mini+maxi+1)>>1;
      |                                    ~~~~~~~~~^~
insects.cpp:34:19: warning: variable 'maxh' set but not used [-Wunused-but-set-variable]
   34 |     int minh = 1, maxh = N-W+1;
      |                   ^~~~

Subtask #1
10.0 / 10.0

#	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	0 ms	208 KB	Output is correct
6	Correct	1 ms	208 KB	Output is correct
7	Correct	2 ms	208 KB	Output is correct
8	Correct	4 ms	208 KB	Output is correct
9	Correct	3 ms	208 KB	Output is correct
10	Correct	5 ms	208 KB	Output is correct
11	Correct	2 ms	208 KB	Output is correct
12	Correct	5 ms	300 KB	Output is correct
13	Correct	5 ms	208 KB	Output is correct
14	Correct	5 ms	304 KB	Output is correct
15	Correct	5 ms	304 KB	Output is correct
16	Correct	5 ms	304 KB	Output is correct
17	Correct	6 ms	208 KB	Output is correct
18	Correct	4 ms	208 KB	Output is correct
19	Correct	6 ms	208 KB	Output is correct
20	Correct	4 ms	208 KB	Output is correct
21	Correct	2 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	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	0 ms	208 KB	Output is correct
6	Correct	1 ms	208 KB	Output is correct
7	Correct	2 ms	208 KB	Output is correct
8	Correct	4 ms	208 KB	Output is correct
9	Correct	3 ms	208 KB	Output is correct
10	Correct	5 ms	208 KB	Output is correct
11	Correct	2 ms	208 KB	Output is correct
12	Correct	5 ms	300 KB	Output is correct
13	Correct	5 ms	208 KB	Output is correct
14	Correct	5 ms	304 KB	Output is correct
15	Correct	5 ms	304 KB	Output is correct
16	Correct	5 ms	304 KB	Output is correct
17	Correct	6 ms	208 KB	Output is correct
18	Correct	4 ms	208 KB	Output is correct
19	Correct	6 ms	208 KB	Output is correct
20	Correct	4 ms	208 KB	Output is correct
21	Correct	2 ms	208 KB	Output is correct
22	Correct	2 ms	208 KB	Output is correct
23	Correct	4 ms	296 KB	Output is correct
24	Correct	8 ms	208 KB	Output is correct
25	Correct	26 ms	208 KB	Output is correct
26	Correct	25 ms	300 KB	Output is correct
27	Correct	16 ms	308 KB	Output is correct
28	Correct	9 ms	208 KB	Output is correct
29	Correct	18 ms	300 KB	Output is correct
30	Correct	25 ms	292 KB	Output is correct
31	Correct	25 ms	208 KB	Output is correct
32	Correct	25 ms	304 KB	Output is correct
33	Correct	14 ms	300 KB	Output is correct
34	Correct	21 ms	284 KB	Output is correct
35	Correct	26 ms	208 KB	Output is correct
36	Correct	20 ms	300 KB	Output is correct
37	Correct	25 ms	208 KB	Output is correct
38	Correct	18 ms	296 KB	Output is correct
39	Correct	20 ms	300 KB	Output is correct
40	Correct	11 ms	288 KB	Output is correct
41	Correct	9 ms	304 KB	Output is correct

Subtask #3
74.91 / 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	0 ms	208 KB	Output is correct
6	Correct	1 ms	208 KB	Output is correct
7	Correct	18 ms	208 KB	Output is correct
8	Correct	14 ms	292 KB	Output is correct
9	Correct	47 ms	292 KB	Output is correct
10	Correct	40 ms	292 KB	Output is correct
11	Correct	35 ms	296 KB	Output is correct
12	Correct	26 ms	296 KB	Output is correct
13	Correct	20 ms	312 KB	Output is correct
14	Correct	49 ms	208 KB	Output is correct
15	Correct	53 ms	280 KB	Output is correct
16	Correct	33 ms	208 KB	Output is correct
17	Correct	38 ms	300 KB	Output is correct
18	Correct	34 ms	284 KB	Output is correct
19	Correct	44 ms	280 KB	Output is correct
20	Correct	51 ms	208 KB	Output is correct
21	Partially correct	49 ms	296 KB	Output is partially correct
22	Correct	59 ms	296 KB	Output is correct
23	Correct	43 ms	320 KB	Output is correct
24	Correct	37 ms	292 KB	Output is correct
25	Correct	22 ms	296 KB	Output is correct
26	Correct	17 ms	208 KB	Output is correct
27	Correct	24 ms	300 KB	Output is correct
28	Correct	49 ms	280 KB	Output is correct
29	Correct	47 ms	292 KB	Output is correct
30	Correct	38 ms	284 KB	Output is correct
31	Correct	55 ms	296 KB	Output is correct
32	Correct	43 ms	304 KB	Output is correct
33	Correct	34 ms	208 KB	Output is correct
34	Correct	36 ms	300 KB	Output is correct
35	Correct	48 ms	280 KB	Output is correct
36	Correct	49 ms	284 KB	Output is correct
37	Partially correct	50 ms	296 KB	Output is partially correct
38	Partially correct	55 ms	392 KB	Output is partially correct
39	Correct	44 ms	296 KB	Output is correct
40	Correct	49 ms	300 KB	Output is correct
41	Correct	45 ms	280 KB	Output is correct
42	Correct	47 ms	208 KB	Output is correct
43	Correct	9 ms	208 KB	Output is correct
44	Correct	39 ms	284 KB	Output is correct
45	Correct	39 ms	292 KB	Output is correct
46	Correct	20 ms	296 KB	Output is correct
47	Correct	26 ms	296 KB	Output is correct
48	Correct	20 ms	292 KB	Output is correct

Submission #799732

Compilation message

Subtask #1 10.0 / 10.0

Subtask #2 15.0 / 15.0

Subtask #3 74.91 / 75.0

Subtask #1
10.0 / 10.0

Subtask #2
15.0 / 15.0

Subtask #3
74.91 / 75.0