Submission #627829

#	Time	Username	Problem	Language	Result	Execution time	Memory
627829		tutis	Rarest Insects (IOI22_insects)	C++17	47.50 / 100	247 ms	544 KiB

insects

#include "insects.h"
#include <bits/stdc++.h>
using namespace std;
int min_cardinality(vector<int> x)
{
    auto cnt = [&](int c)->int
    {
        vector<int>v;
        for (int i : x)
        {
            v.push_back(i);
            move_inside(i);
            int k = press_button();
            if (k == c + 1)
            {
                v.pop_back();
                move_outside(i);
            }
        }
        int r = v.size();
        for (int i : v)
            move_outside(i);
        return r;
    };
    int c = cnt(1);
    int lo = 1;
    int hi = (int)x.size();
    while (lo < hi)
    {
        int m = (lo + hi + 1) / 2;
        int k = cnt(m);
        if (k == m * c)
            lo = m;
        else
            hi = m - 1;
    }
    return lo;
}
int min_cardinality(int N) {
    vector<int>v;
    for (int i = 0; i < N; i++)
        v.push_back(i);
    return min_cardinality(v);
}

• Subtask 1: 10 / 10
• Subtask 2: 15 / 15
• Subtask 3: 22.5 / 75