Submission #1077557

#	Time	Username	Problem	Language	Result	Execution time	Memory
1077557		Muhammad_Aneeq	Rarest Insects (IOI22_insects)	C++17	47.50 / 100	194 ms	1184 KiB

insects

void move_inside(int i);
void move_outside(int i);
int press_button();
#include <iostream>
#include <vector>
using namespace std;
int min_cardinality(int N)
{
	int colors=0;
	vector<int>ind;
	for (int i=0;i<N;i++)
	{
		move_inside(i);
		if (press_button()==2)
			move_outside(i);
		else
		{
			colors++;
			ind.push_back(i);
		}
	}
	for (auto i:ind)
		move_outside(i);
	int st=1,en=N+1;
	while (st+1<en)
	{
		int mid=(st+en)/2;
		ind={};
		for (int i=0;i<N;i++)
		{
			move_inside(i);
			if (press_button()>mid)
				move_outside(i);
			else
				ind.push_back(i);
		}
		if (ind.size()==mid*colors)
			st=mid;
		else
			en=mid;
		for (auto i:ind)
			move_outside(i);
	}
	return st;
}

Compilation message (stderr)

insects.cpp: In function 'int min_cardinality(int)':
insects.cpp:37:17: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   37 |   if (ind.size()==mid*colors)
      |       ~~~~~~~~~~^~~~~~~~~~~~

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