Submission #988533

#	Time	Username	Problem	Language	Result	Execution time	Memory
988533		cnn008	Rarest Insects (IOI22_insects)	C++17	57.25 / 100	107 ms	1484 KiB

insects

#include "bits/stdc++.h"
using namespace std;

#include "insects.h"

#ifdef N_N_C
#include "debug.h"
#else
#define cebug(...) "Arya"
#endif

#define ll long long

const int N=1e5+5;
const int mod=1e9+7;

int min_cardinality(int n){
	set <int> s;
	vector <int> nw;
	int cad=0;
	auto add = [&](int i) -> void{
		s.insert(i);
		move_inside(i);
	};
	auto del = [&](int i) -> void{
		s.erase(i);
		move_outside(i);
	};
	auto clear = [&]() -> void{
		auto _s=s;
		for(auto i:_s) del(i);
	};
	auto check = [&](int k) -> bool{
		nw.clear();
		for(int i=0; i<n; i++){
			if(s.find(i)!=s.end()) continue;
			add(i);
			if(press_button()>k) del(i);
			else nw.push_back(i);
		}
		return (int)s.size()>=cad*k;
	};
	for(int i=0; i<n; i++){
		add(i);
		if(press_button()==1) cad++;
		else del(i);
	}
	clear();
	if(cad<=9){
		vector <int> vis(n,0);
		int type=0;
		for(int i=0; i<n; i++){
			if(!vis[i]){
				vis[i]=++type;
				move_inside(i);
				for(int j=i+1; j<n; j++){
					move_inside(j);
					int val=press_button();
					if(val==2) vis[j]=type;
					move_outside(j);
				}
				move_outside(i);
			}
		}
		map <int,int> mp;
		for(int i=0; i<n; i++) mp[vis[i]]++;
		int ans=INT_MAX;
		for(auto [x,y]:mp) ans=min(ans,y);
		return ans;
	}
	int l=2,r=n/cad,ans=1;
	while(l<=r){
		int mid=(l+r)/2;
		if(check(mid)){
			ans=mid;
			l=mid+1;
		}else{
			r=mid-1;
			for(auto i:nw) del(i);
		}
	}
	return ans;
}
/**  /\_/\
*   (= ._.)
*   / >💖 \>💕
**/

Compilation message (stderr)

insects.cpp:84:9: warning: "/*" within comment [-Wcomment]
   84 | /**  /\_/\
      |

• Subtask 1: 10 / 10
• Subtask 2: 15 / 15
• Subtask 3: 32.25 / 75