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Submission #1076850

# Submission time Handle Problem Language Result Execution time Memory
1076850 2024-08-26T17:18:38 Z Zicrus Rarest Insects (IOI22_insects) C++17
54.04 / 100
 164 ms 1252 KB 
#include <bits/stdc++.h>
#include "insects.h"
using namespace std;
 
typedef long long ll;
 
int n;
vector<bool> in;
unordered_set<int> sIn, sOut;
int cnt;
int numA, numP;

mt19937 mt;
 
void add(int i) {
    if (in[i]) return;
    numA++;
    move_inside(i);
    cnt++;
    in[i] = true;
}

int add_rand() {
    int id = mt() % sOut.size();
    auto iter = sOut.begin();
    while (id--) iter++;
    int i = *iter;
    add(i);
    sOut.erase(i);
    return i;
}

void remove(int i) {
    if (!in[i]) return;
    move_outside(i);
    cnt--;
    in[i] = false;
}

int remove_rand() {
    int id = mt() % sIn.size();
    auto iter = sIn.begin();
    while (id--) iter++;
    int i = *iter;
    remove(i);
    sIn.erase(i);
    return i;
}

int press() {
    numP++;
    return press_button();
}
 
int min_cardinality(int N) {
    n = N;
    cnt = 0;
    numA = numP = 0;
    mt = mt19937(time(0));
    in = vector<bool>(n);
    int cur = 0;
    
    for (int i = 0; i < n; i++) {
        add(i);
        cur = press();
        if (cur > 1) {
            remove(i);
            sOut.insert(i);
            cur = 1;
        }
    }
    int typeCnt = cnt;
    
    int left = 1, right = n / typeCnt;
    bool up = true;
    restart:
    while (left < right) {
        int mid = (left + right + 1) / 2;

        unordered_set<int> later;
        try_up:
        if (up) {
            while (cnt < typeCnt * mid) {
                if (sOut.empty()) {
                    right = mid - 1;
                    up = false;
                    for (auto &e : later) sOut.insert(e);
                    later.clear();
                    goto restart;
                }
                
                int inc = mid - cur + 1;
                int recent = -1;
                while (!sOut.empty() && inc--) {
                    recent = add_rand();
                    sIn.insert(recent);
                }
                cur = press();
                if (cur > mid) {
                    remove(recent);
                    sIn.erase(recent);
                    later.insert(recent);
                    cur = mid;
                }
            }
            left = mid;
            up = true;
            sIn.clear();
            for (auto &e : later) sOut.insert(e);
            later.clear();
        }
        else {
            while (cur > mid) {
                int dec = cur - mid + 1;
                int recent = -1;
                while (dec--) {
                    recent = remove_rand();
                    sOut.insert(recent);
                }
                cur = press();
                if (cur < mid) {
                    add(recent);
                    sOut.erase(recent);
                    later.insert(recent);
                    cur = mid;
                }
            }
            up = true;
            for (auto &e : later) sIn.insert(e);
            later.clear();
            goto try_up;
        }
    }

    return left;
} 
 
#ifdef TEST
#include "grader.cpp"
#endif

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 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 2 ms 344 KB Output is correct
9 Correct 4 ms 344 KB Output is correct
10 Correct 6 ms 456 KB Output is correct
11 Correct 2 ms 344 KB Output is correct
12 Correct 5 ms 452 KB Output is correct
13 Correct 6 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 440 KB Output is correct
17 Correct 2 ms 344 KB Output is correct
18 Correct 4 ms 344 KB Output is correct
19 Correct 4 ms 344 KB Output is correct
20 Correct 4 ms 344 KB Output is correct
21 Correct 2 ms 448 KB Output is correct
22 Correct 2 ms 444 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 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 2 ms 344 KB Output is correct
9 Correct 4 ms 344 KB Output is correct
10 Correct 6 ms 456 KB Output is correct
11 Correct 2 ms 344 KB Output is correct
12 Correct 5 ms 452 KB Output is correct
13 Correct 6 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 440 KB Output is correct
17 Correct 2 ms 344 KB Output is correct
18 Correct 4 ms 344 KB Output is correct
19 Correct 4 ms 344 KB Output is correct
20 Correct 4 ms 344 KB Output is correct
21 Correct 2 ms 448 KB Output is correct
22 Correct 2 ms 444 KB Output is correct
23 Correct 4 ms 472 KB Output is correct
24 Correct 5 ms 344 KB Output is correct
25 Correct 14 ms 344 KB Output is correct
26 Correct 26 ms 600 KB Output is correct
27 Correct 52 ms 592 KB Output is correct
28 Correct 7 ms 960 KB Output is correct
29 Correct 65 ms 848 KB Output is correct
30 Correct 25 ms 344 KB Output is correct
31 Correct 8 ms 456 KB Output is correct
32 Correct 10 ms 344 KB Output is correct
33 Correct 21 ms 704 KB Output is correct
34 Correct 10 ms 344 KB Output is correct
35 Correct 12 ms 476 KB Output is correct
36 Correct 17 ms 344 KB Output is correct
37 Correct 20 ms 444 KB Output is correct
38 Correct 20 ms 600 KB Output is correct
39 Correct 17 ms 600 KB Output is correct
40 Correct 13 ms 468 KB Output is correct
41 Correct 5 ms 448 KB Output is correct

Subtask #3
29.04 / 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 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 12 ms 440 KB Output is correct
8 Correct 13 ms 344 KB Output is correct
9 Correct 19 ms 344 KB Output is correct
10 Partially correct 38 ms 544 KB Output is partially correct
11 Partially correct 164 ms 848 KB Output is partially correct
12 Correct 18 ms 464 KB Output is correct
13 Partially correct 130 ms 1080 KB Output is partially correct
14 Partially correct 84 ms 792 KB Output is partially correct
15 Correct 14 ms 344 KB Output is correct
16 Correct 23 ms 592 KB Output is correct
17 Correct 19 ms 344 KB Output is correct
18 Correct 18 ms 644 KB Output is correct
19 Correct 39 ms 600 KB Output is correct
20 Correct 24 ms 512 KB Output is correct
21 Partially correct 55 ms 860 KB Output is partially correct
22 Partially correct 60 ms 600 KB Output is partially correct
23 Partially correct 42 ms 804 KB Output is partially correct
24 Correct 33 ms 760 KB Output is correct
25 Correct 16 ms 344 KB Output is correct
26 Correct 10 ms 344 KB Output is correct
27 Correct 24 ms 344 KB Output is correct
28 Correct 26 ms 592 KB Output is correct
29 Correct 16 ms 748 KB Output is correct
30 Correct 20 ms 516 KB Output is correct
31 Partially correct 40 ms 344 KB Output is partially correct
32 Partially correct 41 ms 600 KB Output is partially correct
33 Partially correct 58 ms 568 KB Output is partially correct
34 Partially correct 56 ms 568 KB Output is partially correct
35 Correct 35 ms 728 KB Output is correct
36 Correct 19 ms 732 KB Output is correct
37 Partially correct 46 ms 712 KB Output is partially correct
38 Partially correct 33 ms 756 KB Output is partially correct
39 Correct 23 ms 344 KB Output is correct
40 Correct 24 ms 344 KB Output is correct
41 Correct 25 ms 448 KB Output is correct
42 Correct 21 ms 960 KB Output is correct
43 Partially correct 17 ms 344 KB Output is partially correct
44 Partially correct 137 ms 1252 KB Output is partially correct
45 Correct 11 ms 344 KB Output is correct
46 Correct 23 ms 480 KB Output is correct
47 Correct 20 ms 612 KB Output is correct
48 Correct 17 ms 708 KB Output is correct