Submission #627846

#	Time	Username	Problem	Language	Result	Execution time	Memory
627846		haojiandan	Rarest Insects (IOI22_insects)	C++17	99.89 / 100	86 ms	420 KiB

insects

#include "insects.h"
#include <bits/stdc++.h>
using namespace std;
int n;
int min_cardinality(int _n) {
	n=_n; vector<int> V; int cnt=0;
	for (int i=0;i<n;i++) {
		move_inside(i);
		if (press_button()>1) move_outside(i),V.push_back(i); else cnt++;
	}
	if (cnt==1) return n;
	int l=2,r=n/cnt,mid,res=1;
	int lst=1;
	while (l<=r) {
		mid=(l+r)>>1;
		vector<int> V1,V2; int c=0;
		for (int &x : V) {
			move_inside(x);
			if (press_button()>mid) move_outside(x),V2.push_back(x); else c++,V1.push_back(x);
		}
		if (c==cnt*(mid-lst)) {
			res=mid; V.swap(V2); lst=mid; l=mid+1;
		} else {
			r=mid-1; for (int &x : V1) move_outside(x); V.swap(V1);
		}
	}
	return res;
}

• Subtask 1: 10 / 10
• Subtask 2: 15 / 15
• Subtask 3: 74.89 / 75