제출 #1185281

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1185281		thelegendary08	드문 곤충 (IOI22_insects)	C++17	47.50 / 100	55 ms	428 KiB

insects

#include "insects.h"
#include<bits/stdc++.h>
#define f0r(i,n) for(int i = 0; i<n; i++)
#define vi vector<int>
#define vb vector<bool>
#define pb push_back
using namespace std;
int min_cardinality(int N) {
	vb in(N);
	f0r(i, N){
		move_inside(i);
		in[i] = 1;
		int x = press_button();
		if(x > 1){
			move_outside(i);
			in[i] = 0;
		}
	}
	int d = 0;
	f0r(i, N){
		if(in[i])d++;
	}
	int lo = 1;
	int hi = N/d+1;
	while(lo < hi){
		int mid = lo + (hi - lo + 1) / 2;
		vi lst;
		f0r(i, N){
			if(!in[i]){
				move_inside(i);
				in[i] = 1;
			}
			int x = press_button();
			if(x > mid){
				move_outside(i);
				in[i] = 0;
			}
			else{
				lst.pb(i);
			}
		}
		int cnt = 0;
		f0r(i, N){
			if(in[i])cnt++;
		}
		if(cnt == d * mid){
			lo = mid;
		}
		else{
			hi = mid - 1;
			for(auto u : lst){
				move_outside(u);
				in[u] = 0;
			}
		}
	}
	return lo;
}

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