제출 #1024596

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1024596		Issa	드문 곤충 (IOI22_insects)	C++17	0 / 100	0 ms	596 KiB

insects

#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
pair<int, int> pii;

const int maxn = 1e5 + 100;

int n, d, c;
int used[maxn];
int f[maxn];

void move_inside(int i);
void move_outside(int i);
int press_button();

void add(int i){
	used[i] = 1;
	c += f[i];
	move_inside(i);
}
void del(int i){
	used[i] = 0;
	c -= f[i];
	move_outside(i);
}
void clear(){
	for(int i = 1; i <= n; i++){
		if(used[i]) del(i);
	}
}

void calc(int x, int y){
	if(x < y){
		for(int i = 0; i < n; i++){
			if(used[i]) continue;
			add(i);
			if(press_button() > y) del(i);
		}
	} else{
		for(int i = n - 1; i >= 0; i--){
			if(used[i] && press_button() > y){
				del(i);
			}
		}
		for(int i = 0; i < n; i++){
			if(used[i]) continue;
			add(i);
			if(press_button() > y) del(i);
		}
	}
}

int min_cardinality(int N){
	d = 0; n = N;
	for(int i = N - 1; i >= 0; i--){
		add(i);
		if(press_button() == 1) f[i] = 1, d++;
		else del(i);
	} clear(); c = 0;
	int ans = n, x = 0;
	for(int l = 1, r = n - 1; l <= r;){
		int mid = (l + r) >> 1;
		calc(x, mid); x = mid;
		if(!c) l = mid + 1;
		else r = mid - 1, ans = mid;
	}
	return ans;
}

• Subtask 1: 0 / 10
• Subtask 2: 0 / 15
• Subtask 3: 0 / 75