Submission #1078188

#	Time	Username	Problem	Language	Result	Execution time	Memory
1078188		Muhammad_Aneeq	Rarest Insects (IOI22_insects)	C++17	92.99 / 100	61 ms	664 KiB

insects

void move_inside(int i);
void move_outside(int i);
int press_button();
#include <iostream>
#include <vector>
#include <map>
#include <set>
#include <bitset>
using namespace std;
int const MAXN=2000;
bitset<MAXN>ind,ni;
int min_cardinality(int N)
{
	int colors=0;
	for (int i=0;i<N;i++)
	{
		move_inside(i);
		ind[i]=1;
		if (press_button()==2)
		{
			move_outside(i);
			ind[i]=0;
		}
		else
			colors++;
	}
	for (int i=0;i<N;i++)
		ni[i]=1-ind[i];
	if (colors==1)
		return N;
	int st=1,en=N/colors+1;
	int cnt=colors;
	while (st+1<en)
	{
		int mid=(st+en)/2;
		for (int i=0;i<N;i++)
		{
			if (cnt==mid*colors)
				break;
			if (ni[i])
			{
				move_inside(i);
				ind[i]=1;
				if (press_button()>mid)
				{
					ind[i]=0;
					move_outside(i);
				}
				else
				{
					cnt++;
					ni[i]=0;
				}
			}
		}
		if (cnt==mid*colors)
			st=mid;
		else
		{
			en=mid;
			for (int i=0;i<N;i++)
			{
				if (ind[i])
				{
					move_outside(i);
					ind[i]=0;
					ni[i]=1;
				}
				else
					ni[i]=0;
			}
			cnt=0;
		}
	}
	return st;
}

• Subtask 1: 10 / 10
• Subtask 2: 15 / 15
• Subtask 3: 67.99 / 75