Submission #1077362

#	Time	Username	Problem	Language	Result	Execution time	Memory
1077362		Faisal_Saqib	Rarest Insects (IOI22_insects)	C++17	0 / 100	1 ms	344 KiB

insects

#include <bits/stdc++.h>
using namespace std;
void move_inside(int i);
void move_outside(int i);
int press_button();
map<set<int>,int> store;
set<int> cur,real_;
void add(int i)
{
	i--;
	cur.insert(i);
}
void rem(int i)
{
	i--;
	if(cur.find(i)!=cur.end())
		cur.erase(i);
}
void khatam()
{
	cur.clear();
}
int ask()
{
	if(store.find(cur)!=store.end())return store[cur];
	for(auto i:cur)
	{
		if(real_.find(i)==real_.end())
		{
			real_.insert(i);
			move_inside(i);
		}
	}
	set<int> rem;
	for(auto j:real_)
	{
		if(cur.find(j)==cur.end())
		{
			rem.insert(j);
			move_outside(j);
		}
	}
	for(auto i:rem)real_.erase(i);
	return store[cur]=press_button();
}
const int M=2e3+10;
int par[M],sz[M];
int get(int x)
{
	if(par[x]==x)return x;
	return par[x]=get(par[x]);
}
void merge(int x,int y)
{
	x=get(x);
	y=get(y);
	par[y]=x;
	sz[x]+=sz[y];
}
int min_cardinality(int n)
{
	for(int i=1;i<=n;i++)
		par[i]=i,sz[i]=1;
	vector<int> heads={1};
	for(int i=2;i<=n;i++)
	{
		int sz=heads.size();
		int s=0,e=sz;
		// can be head[s] 
		// not head[e]
		while(s+1<e)
		{
			int mid=(s+e)/2;
			khatam();
			for(int j=s;j<=mid;j++)
				add(heads[j]);
			add(i);
			int aft=ask();
			if(aft==2)
			{
				e=mid;
			}
			else
			{
				s=mid;
			}
		}
		if(e==sz)
		{
			heads.push_back(i);
		}
		else
		{
			merge(heads[e],i);
		}
	}
	int mi=n+1;
	for(auto i:heads)
		mi=min(mi,sz[i]);
	return mi;
}

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