Submission #1191531

#	Time	Username	Problem	Language	Result	Execution time	Memory
1191531		drakozs	드문 곤충 (IOI22_insects)	C++20	52.76 / 100	50 ms	436 KiB

insects

#include "insects.h"
#include<bits/stdc++.h>

using namespace std;

int min_cardinality(int N) {
	vector<int> temp;
	int d = 0;
	for (int i = 0; i < N; i++){
		move_inside(i);
		int count = press_button();
		if (count > 1){
			move_outside(i);
		}
		else{
			temp.push_back(i);
			d++;
		}
	}
	for (int i = 0; i < temp.size(); i++){
		move_outside(temp[i]);
	}
	
	int ans = N;
	int oriN = N;
	vector<int> newUse(N);
	for (int i = 0; i < N; i++){
		newUse[i] = i;
	}
	if (d == 1) return N;
	if (N / d <= 10){
		while(1){
			int B = N / d;
			vector<int> all;
			for (int i = 0; i < newUse.size(); i++){
				move_inside(newUse[i]);
				int count = press_button();
				if (count > B){
					move_outside(newUse[i]);
				}
				else{
					all.push_back(newUse[i]);
					if (all.size() == B * d) break;
				}
			}
			if (all.size() == B * d){
				return B;
			}
			N = all.size();
			for (int i = 0; i < all.size(); i++){
				move_outside(all[i]);
			}
			newUse = all;
		}
	}
	else{
		int ans = N;
		int l = 1, r = N / d, mid;
		while(l <= r){
			mid = (r - l) / 2 + l;
			vector<int> allIn;
			for (int i = 0; i < N; i++){
				move_inside(i);
				int count = press_button();
				if (count > mid){
					move_outside(i);
				}
				else{
					allIn.push_back(i);
					if (allIn.size() == d * mid) break;
				}
			}
			if (allIn.size() == d * mid){
				ans = mid;
				l = mid + 1;
			}
			else{
				r = mid - 1;
			}
			for (int i = 0; i < allIn.size(); i++){
				move_outside(allIn[i]);
			}
		}
		return ans;
	}
	
	return 1;
}

• Subtask 1: 10 / 10
• Subtask 2: 15 / 15
• Subtask 3: 27.76 / 75