Submission #1042707

#	Time	Username	Problem	Language	Result	Execution time	Memory
1042707		Nurislam	Rarest Insects (IOI22_insects)	C++17	47.50 / 100	121 ms	932 KiB

insects

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

#define pb push_back
#define ff first
#define ss second
#define all(x) x.begin(),x.end()
#define rall(x) x.rbegin(),x.rend()

template <class F, class _S>
bool chmin(F &u, const _S &v){
	bool flag = false;
	if ( u > v ){
		u = v; flag |= true;
	}
	return flag;
}

template <class F, class _S>
bool chmax(F &u, const _S &v){
	bool flag = false;
	if ( u < v ){
		u = v; flag |= true;
	}
	return flag;
}
int min_cardinality(int n) {
	vector<int> v(n);
	iota(all(v), 0);
	int k = 0;
	vector<int> er;
	for(int i = 0; i < n; i++){
		move_inside(i);
		if(press_button() == 1){
			k++;
			er.pb(i);
		}else move_outside(i);
	}
	for(auto i:er)move_outside(i);
	int l = 1, r = n/k+1, ans = 1;
	while(l <= r){
		int m = (l+r)>>1;
		//~ cout << m << '\n';
		int d = 0;
		vector<int> er;
		for(int i:v){
			move_inside(i);
			if(press_button() <= m){
				d++;
				er.pb(i);
			}else move_outside(i);
		}
		//~ for(auto i:er)cout << i << ' ';
		//~ cout << '\n';
		if(k*m == d){
			ans = m;
			l = m+1;
		}else{
			r = m-1;
		}
		for(auto i:er)move_outside(i);
	}
	return ans;
}

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