oj.uz

Submission #867967

# Submission time Handle Problem Language Result Execution time Memory
867967 2023-10-30T02:08:47 Z Lib Rarest Insects (IOI22_insects) C++17
0 / 100
 211 ms 344 KB 
#include <bits/stdc++.h>
#include "insects.h"
using namespace std;

deque <int> PrevIndex;
int InMachine[2003];
int n;
int TypeCount;

int PossibleMincount(int cnt){
	PrevIndex.clear();
	//Pushing insects inside the machine, keeping track of the ones being putted inside for this iteration of binary searching
	for(int i=0;i<n;i++){
		if(!InMachine[i]){
			InMachine[i]=1;
			move_inside(i);
			PrevIndex.push_back(i);
			if(press_button()>cnt){
				move_outside(i);
				InMachine[i]=0;
				PrevIndex.pop_back();
			}
		}
	}
	int CurrentInMachine=0;
	for(int i=0;i<n;i++){
		CurrentInMachine+=InMachine[i];
	}
	if(CurrentInMachine<cnt*TypeCount){
		//There clearly exist a type of insect with cardinality less than cnt, so the answer is less than cnt. Removing insects from last iteration.
		while(!PrevIndex.empty()){
			InMachine[PrevIndex.front()]=0;
			move_outside(PrevIndex.front());
			PrevIndex.pop_front();
		}
		return 0;
	}else{
		//As every type of insects has at least cnt insects, the answer is at least cnt. Just return true
		PrevIndex.clear();
		return 1;
	}
}

int min_cardinality(int N){
	int l,r,mid;
	n=N;
	l=1;
	//Phase 1: Determining the amount of different types of insects
	for(int i=0;i<n;i++){
		move_inside(i);
		InMachine[i]=1;
		PrevIndex.push_back(i);
		if(press_button()>1){
			move_outside(i);
			InMachine[i]=0;
			PrevIndex.pop_back();
		}
	}
	TypeCount=PrevIndex.size();
	r=N/TypeCount;
	//Remember to empty the machine before actually binary searching as well. Silly me
	while(!PrevIndex.empty()){
			InMachine[PrevIndex.front()]=0;
			move_outside(PrevIndex.front());
			PrevIndex.pop_front();
		}
	
	//Phase 2: Binary search for the answer
	while(r-l>=1){
		mid=(l+r)/2;
		if(PossibleMincount(mid)){
			l=mid;
		}else{
			r=mid-1;
		}
	}
	if(PossibleMincount(l)){
		return l;
	}else{
		return r;
	}
}

Subtask #1
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 192 ms 344 KB Too many queries.
2 Halted 0 ms 0 KB -

Subtask #2
0 / 15.0

# Verdict Execution time Memory Grader output
1 Incorrect 192 ms 344 KB Too many queries.
2 Halted 0 ms 0 KB -

Subtask #3
0 / 75.0

# Verdict Execution time Memory Grader output
1 Incorrect 211 ms 344 KB Too many queries.
2 Halted 0 ms 0 KB -