Submission #632098

#	Time	Username	Problem	Language	Result	Execution time	Memory
632098		Mahtimursu	Rarest Insects (IOI22_insects)	C++17	99.89 / 100	62 ms	432 KiB

insects

#include "insects.h"
#include <vector>
#include <algorithm>
#include <bits/stdc++.h>
 
using namespace std;
 
vector<int> v; 
int inside = 0;
 
mt19937 rng(chrono::system_clock::now().time_since_epoch().count());
 
int min_cardinality(int n) {
    int uniq = 0;
    for (int i = 0; i < n; ++i) {
        move_inside(i);
 
        if (press_button() > 1) {
            move_outside(i);
            v.push_back(i);
        } else uniq++;
    }
 
    if (uniq == 1) return n;
    if (uniq > n / 2) return 1;
 
    inside = uniq;
    int ans = 1;
    int left = 1;
    int right = n / uniq;
 
    while (left < right) {
        int mid = (left + right + 1) / 2;
        
        vector<int> in;
 
        int mx = mid;
        int gc = 0;
 
        for (int x : v) {
            move_inside(x);
 
            if (press_button() > mx) {
                move_outside(x);
            } else {
                in.push_back(x);
                gc++;
            }
        }
 
        if ((inside + gc) / mx == uniq) {
            inside += gc;
            for (int x : in) v.erase(find(v.begin(), v.end(), x));
            ans = mid;
            left = mid;
        } else {
            v = in;
            right = mid - 1;
            for (int x : in) move_outside(x);
        }

        //cout << v.size() << endl;
    }
 
    return ans;
}

• Subtask 1: 10 / 10
• Subtask 2: 15 / 15
• Subtask 3: 74.89 / 75