Submission #1025194

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
1025194	2024-07-16T17:18:06 Z	Wansur	Rarest Insects (IOI22_insects)	C++17	99.64 / 100	48 ms	1108 KB

insects

#include <bits/stdc++.h>
#define ent '\n'

void move_inside(int i);
void move_outside(int i);
int press_button();

using namespace std;
typedef long long ll;
const int maxn = 1e5 + 12;

mt19937 rng(10223431);
bool used[maxn];
vector<int> p;
vector<int> d;
int n, m, c, cnt = 0;

bool check(int x){
    x -= cnt;
    vector<int> a, b;
    for(int i:p){
        if(used[i]) continue;
        move_inside(i);
        if(press_button() > x){
            move_outside(i);
            b.push_back(i);
        }
        else a.push_back(i);
        if(a.size() == x * m) break;
    }
    for(int x:a){
        move_outside(x);
    }
    if(a.size() == x * m){
        cnt += x;
        for(int x:a){
            used[x] = 1;
            c--;
        }
        return 1;
    }
    for(int x:b){
        used[x] = 1;
        c--;
    }
    return 0;
}

int min_cardinality(int N){
    n = N;
    c = n;
    for(int i=0;i<n;i++){
        p.push_back(i);
        move_inside(i);
        if(press_button() != 1){
            move_outside(i);
        }
        else m++;
    }
    for(int i=0;i<n;i++){
        swap(p[i], p[rng() % n]);
    }
    int ans = 0;
    for(int l = 1, r = (n + m - 1) / m; l <= r;){
        int mid = l + r >> 1;
        if(check(mid)){
            ans = mid;
            l = mid + 1;
        }
        else r = mid - 1;
    }
    return ans;
}

Compilation message

insects.cpp: In function 'bool check(int)':
insects.cpp:29:21: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   29 |         if(a.size() == x * m) break;
      |            ~~~~~~~~~^~~~~~~~
insects.cpp:34:17: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   34 |     if(a.size() == x * m){
      |        ~~~~~~~~~^~~~~~~~
insects.cpp: In function 'int min_cardinality(int)':
insects.cpp:65:21: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   65 |         int mid = l + r >> 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	1 ms	344 KB	Output is correct
4	Correct	1 ms	344 KB	Output is correct
5	Correct	1 ms	344 KB	Output is correct
6	Correct	4 ms	344 KB	Output is correct
7	Correct	2 ms	448 KB	Output is correct
8	Correct	4 ms	344 KB	Output is correct
9	Correct	3 ms	344 KB	Output is correct
10	Correct	3 ms	344 KB	Output is correct
11	Correct	3 ms	344 KB	Output is correct
12	Correct	4 ms	344 KB	Output is correct
13	Correct	2 ms	340 KB	Output is correct
14	Correct	3 ms	344 KB	Output is correct
15	Correct	3 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	4 ms	344 KB	Output is correct
20	Correct	2 ms	444 KB	Output is correct
21	Correct	3 ms	344 KB	Output is correct
22	Correct	3 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	1 ms	344 KB	Output is correct
5	Correct	1 ms	344 KB	Output is correct
6	Correct	4 ms	344 KB	Output is correct
7	Correct	2 ms	448 KB	Output is correct
8	Correct	4 ms	344 KB	Output is correct
9	Correct	3 ms	344 KB	Output is correct
10	Correct	3 ms	344 KB	Output is correct
11	Correct	3 ms	344 KB	Output is correct
12	Correct	4 ms	344 KB	Output is correct
13	Correct	2 ms	340 KB	Output is correct
14	Correct	3 ms	344 KB	Output is correct
15	Correct	3 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	4 ms	344 KB	Output is correct
20	Correct	2 ms	444 KB	Output is correct
21	Correct	3 ms	344 KB	Output is correct
22	Correct	3 ms	344 KB	Output is correct
23	Correct	18 ms	432 KB	Output is correct
24	Correct	13 ms	344 KB	Output is correct
25	Correct	13 ms	344 KB	Output is correct
26	Correct	24 ms	856 KB	Output is correct
27	Correct	8 ms	344 KB	Output is correct
28	Correct	16 ms	344 KB	Output is correct
29	Correct	13 ms	456 KB	Output is correct
30	Correct	14 ms	444 KB	Output is correct
31	Correct	18 ms	452 KB	Output is correct
32	Correct	19 ms	1108 KB	Output is correct
33	Correct	15 ms	344 KB	Output is correct
34	Correct	14 ms	596 KB	Output is correct
35	Correct	15 ms	600 KB	Output is correct
36	Correct	17 ms	456 KB	Output is correct
37	Correct	21 ms	600 KB	Output is correct
38	Correct	15 ms	704 KB	Output is correct
39	Correct	16 ms	344 KB	Output is correct
40	Correct	13 ms	592 KB	Output is correct
41	Correct	14 ms	344 KB	Output is correct

Subtask #3
74.64 / 75.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	0 ms	596 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	1 ms	344 KB	Output is correct
6	Correct	0 ms	344 KB	Output is correct
7	Correct	23 ms	468 KB	Output is correct
8	Correct	17 ms	592 KB	Output is correct
9	Correct	31 ms	344 KB	Output is correct
10	Correct	28 ms	692 KB	Output is correct
11	Correct	25 ms	448 KB	Output is correct
12	Correct	17 ms	344 KB	Output is correct
13	Correct	38 ms	592 KB	Output is correct
14	Correct	35 ms	600 KB	Output is correct
15	Correct	23 ms	344 KB	Output is correct
16	Correct	39 ms	456 KB	Output is correct
17	Correct	27 ms	592 KB	Output is correct
18	Correct	29 ms	448 KB	Output is correct
19	Correct	28 ms	600 KB	Output is correct
20	Correct	21 ms	344 KB	Output is correct
21	Correct	30 ms	692 KB	Output is correct
22	Correct	45 ms	592 KB	Output is correct
23	Correct	28 ms	344 KB	Output is correct
24	Partially correct	38 ms	692 KB	Output is partially correct
25	Correct	24 ms	592 KB	Output is correct
26	Correct	24 ms	700 KB	Output is correct
27	Correct	37 ms	440 KB	Output is correct
28	Correct	27 ms	344 KB	Output is correct
29	Correct	29 ms	344 KB	Output is correct
30	Correct	23 ms	448 KB	Output is correct
31	Correct	46 ms	604 KB	Output is correct
32	Correct	31 ms	344 KB	Output is correct
33	Correct	42 ms	344 KB	Output is correct
34	Correct	48 ms	456 KB	Output is correct
35	Correct	30 ms	344 KB	Output is correct
36	Correct	34 ms	344 KB	Output is correct
37	Correct	25 ms	452 KB	Output is correct
38	Correct	41 ms	600 KB	Output is correct
39	Correct	38 ms	452 KB	Output is correct
40	Correct	32 ms	344 KB	Output is correct
41	Correct	46 ms	684 KB	Output is correct
42	Correct	37 ms	848 KB	Output is correct
43	Correct	12 ms	600 KB	Output is correct
44	Correct	18 ms	344 KB	Output is correct
45	Correct	15 ms	456 KB	Output is correct
46	Correct	38 ms	860 KB	Output is correct
47	Correct	24 ms	600 KB	Output is correct
48	Correct	29 ms	700 KB	Output is correct

Submission #1025194

Compilation message

Subtask #1 10.0 / 10.0

Subtask #2 15.0 / 15.0

Subtask #3 74.64 / 75.0

Subtask #1
10.0 / 10.0

Subtask #2
15.0 / 15.0

Subtask #3
74.64 / 75.0