제출 #658617

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
658617		pere_gil	드문 곤충 (IOI22_insects)	C++17	57.64 / 100	159 ms	432 KiB

insects

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

const int MAX_N=2005;
bool in[MAX_N];
int f[MAX_N];
int tot_in;

void pri(int n){
	printf("%d in machine: ",tot_in);
	for(int i=0;i<n;i++) if(in[i]) printf("%d ",i);
	printf("\n");
	for(int i=0;i<n;i++) printf("(%d: %d) ",i,f[i]);
	printf("\n");
}

int get(int n){
	int res=0;
	bool in[n]={};
	int prev=0;
	for(int i=0;i<n;i++){
		move_inside(i);

		int q=press_button();
		
		if(q>1) move_outside(i);
		else{
			res++;
			in[i]=true;
		}

		if(q>prev) f[i]=q;
		prev=q;
	}
	for(int i=0;i<n;i++) if(in[i]) move_outside(i);
	return res;
}
         
bool check(int n, int x, int dif){
	vector<int> aux;
	int prev=0;
	for(int i=0;i<n;i++){
		if(in[i] || f[i]>x) continue;
		
		move_inside(i);
		int q=press_button();
		
		if(q>x) move_outside(i);
		else{
			in[i]=true;
			tot_in++;
			aux.push_back(i);
		}
		
		if(q>prev) f[i]=q;
		prev=q;
		
		if(tot_in==x*dif) return true;
	}
     
	for(int i: aux){
		in[i]=false;
		tot_in--;
		move_outside(i);
	}
	return false;
}
         
int min_cardinality(int n) {
	int dif=get(n);
         
	if(dif==1) return n;
         
	memset(in,false,sizeof in);
	memset(f,0,sizeof f);
	tot_in=0;
        	
	int l=1,r=n/dif+1;
	while(l+1<r){
		int med=(l+r)/2;
		if(check(n,med,dif)) l=med;
		else r=med;
	}
	
	return l;
}

• Subtask 1: 10 / 10
• Subtask 2: 15 / 15
• Subtask 3: 32.64 / 75