Submission #1237549

#	Time	Username	Problem	Language	Result	Execution time	Memory
1237549		CyberCow	Rarest Insects (IOI22_insects)	C++20	0 / 100	2 ms	404 KiB

insects

#include "insects.h"
#include <vector>
#include <random>
#include <algorithm>
using namespace std;
mt19937 rnd(4312);

int color[2005];

int min_cardinality(int N)
{
	int tarbqan = 0;
	vector<int> mej;
	for (int i = 0; i < N; i++)
	{
		move_inside(i);
		if (press_button() != 1)
		{
			move_outside(i);
		}
		else
			mej.push_back(i);
	}
	tarbqan = mej.size();
	if (tarbqan == 1)
	{
		return N;
	}
	for (int i = 0; i < mej.size(); i++)
	{
		move_outside(mej[i]);
	}
	mej.clear();
	int l = 1, r = N / tarbqan, ans = 0;
	int verjivichak = 0;
	while (l <= r)
	{
		int m = (l + r) / 2;
		int x;
		if (verjivichak == 0)
		{
			for (int i = 0; i < N; i++)
			{
				if (color[i] == 0)
				{
					move_inside(i);
					if (press_button() > m)
					{
						move_outside(i);
					}
					else
					{
						color[i] = 1;
						mej.push_back(i);
					}
				}
			}
		}
		else
		{
			shuffle(mej.begin(), mej.begin(), rnd);
			while (press_button() > m)
			{
				color[mej.back()] = 2;
				move_outside(mej.back());
				mej.pop_back();
			}
			for (int i = 0; i < N; i++)
			{
				if (color[i] == 2)
				{
					move_inside(i);
					if (press_button() > m)
					{
						move_outside(i);
						color[i] = 0;
					}
					else
					{
						color[i] = 1;
					}
				}
			}
		}
		if (mej.size() == tarbqan * m)
		{
			verjivichak = 0;
			l = m + 1;
			ans = m;
		}
		else
		{
			verjivichak = 1;
			r = m - 1;
			m = (l + r) / 2;
		}
	}
	return ans;
}

• Subtask 1: 0 / 10
• Subtask 2: 0 / 15
• Subtask 3: 0 / 75