Submission #1037786

#	Time	Username	Problem	Language	Result	Execution time	Memory
1037786		irmuun	Rarest Insects (IOI22_insects)	C++17	0 / 100	0 ms	344 KiB

insects

#include<bits/stdc++.h>
#include "insects.h"
 
using namespace std;
 
#define ll long long
#define pb push_back
#define ff first
#define ss second
#define all(s) s.begin(),s.end()
#define rall(s) s.rbegin(),s.rend()
 
int min_cardinality(int n){
    int d=0;
    vector<bool>used(n,0);
    for(int i=0;i<n;i++){
        d++;
        move_inside(i);
        int cnt=press_button();
        if(cnt>1){
            move_outside(i);
            d--;
        }
        else{
            used[i]=true;
        }
    }
    int l=1,r=n/d;
    int last=1;
    while(l<r){
        int mid=(l+r+1)/2;
        vector<int>added;
        int len=last*d;
        for(int i=0;i<n;i++){
            if(!used[i]){
                move_inside(i);
                if(press_button()>mid){
                    move_outside(i);
                }
                else{
                    len++;
                    added.pb(i);
                }
            }
        }
        if(len==mid+1){
            for(int i:added){
                used[i]=true;
            }
            l=mid;
            last=mid;
        }
        else{
            r=mid-1;
        }
    }
    return last;
}

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