oj.uz

Submission #1054762

# Submission time Handle Problem Language Result Execution time Memory
1054762 2024-08-12T11:59:01 Z Ignut Rarest Insects (IOI22_insects) C++17
0 / 100
 101 ms 1000 KB 
/* Ignut
started: 11.08.2024
now: 12.08.2024
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*/

#include <bits/stdc++.h>

using namespace std;
using ll = long long;

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

int n;

vector<int> diff;

vector<int> in;

int prev_mid = 1;

map<int, int> cnt;

int Go(int maxCount) {
    if (prev_mid < maxCount) {
        while (!in.empty()) {
            cnt[in.back()] --;
            move_outside(in.back());
            in.pop_back();
        }
    }
    prev_mid = maxCount;
    for (int i = 0; i < n; i ++) {
        if (cnt[i] >= 1) continue;
        move_inside(i);
        in.push_back(i);
        cnt[i] ++;
        if (press_button() > maxCount) {
            move_outside(i);
            in.pop_back();
            cnt[i] --;
        }
    }
    int res = in.size();
    if (maxCount == 1) diff = in;
    return res;
}

int min_cardinality(int N) {
    n = N;
    int cntDiff = Go(1);
    
    if (cntDiff <= 0) {
        int minRes = N, sum = 0;
        for (int i = 0; i < cntDiff - 1; i ++) {
            vector<int> in;
            in.push_back(diff[i]);
            move_inside(diff[i]);
            for (int j = diff[i] + 1; j < N; j ++) {
                move_inside(j);
                in.push_back(j);
                // cout << "try " << j << ' ';
                if (press_button() != in.size()) {
                    in.pop_back();
                    move_outside(j);
                    // cout << "! ";
                }
            }
            // cout << '\n';
            minRes = min(minRes, int(in.size()));
            sum += in.size();
            // cout << "have : " << in.size() << '\n';
            // for (int val : in) cout << val << ' ';
            // cout << '\n';
            while (!in.empty()) {
                move_outside(in.back());
                in.pop_back();
            }
        }
        minRes = min(minRes, N - sum);
        return minRes;
    }

    int lo = 1, hi = N / cntDiff;
    while (lo < hi) {
        int mid = lo + (hi - lo + 1) / 2;
        if (1ll * Go(mid) == 1ll * mid * cntDiff)
            lo = mid;
        else
            hi = mid - 1;
    }
    return lo;
}

Compilation message

insects.cpp: In function 'int min_cardinality(int)':
insects.cpp:86:36: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   86 |                 if (press_button() != in.size()) {
      |                     ~~~~~~~~~~~~~~~^~~~~~~~~~~~

Subtask #1
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 1 ms 344 KB Output is correct
6 Correct 10 ms 344 KB Output is correct
7 Correct 1 ms 344 KB Output is correct
8 Correct 6 ms 344 KB Output is correct
9 Incorrect 2 ms 692 KB Wrong answer.
10 Halted 0 ms 0 KB -

Subtask #2
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 1 ms 344 KB Output is correct
6 Correct 10 ms 344 KB Output is correct
7 Correct 1 ms 344 KB Output is correct
8 Correct 6 ms 344 KB Output is correct
9 Incorrect 2 ms 692 KB Wrong answer.
10 Halted 0 ms 0 KB -

Subtask #3
0 / 75.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 0 ms 388 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 Partially correct 1 ms 344 KB Output is partially correct
7 Partially correct 101 ms 768 KB Output is partially correct
8 Correct 8 ms 1000 KB Output is correct
9 Partially correct 54 ms 768 KB Output is partially correct
10 Partially correct 45 ms 596 KB Output is partially correct
11 Incorrect 89 ms 600 KB Wrong answer.
12 Halted 0 ms 0 KB -