Submission #938615

#	Time	Username	Problem	Language	Result	Execution time	Memory
938615		irmuun	Rarest Insects (IOI22_insects)	C++17	53.13 / 100	93 ms	1728 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;
    set<int>st;
    for(int i=0;i<n;i++){
        d++;
        move_inside(i);
        st.insert(i);
        int cnt=press_button();
        if(cnt>1){
            move_outside(i);
            st.erase(i);
            d--;
        }
    }
    for(auto i:st){
        move_outside(i);
    }
    if(d==1) return n;
    if(d==2){
        for(int i=0;i<n;i++){
            move_inside(i);
        }
        int cnt=press_button();
        return n-cnt;
    }
    int l=1,r=n/d;
    while(l<r){
        int mid=(l+r+1)/2;
        int len=0;
        st.clear();
        for(int i=0;i<n;i++){
            len++;
            move_inside(i);
            st.insert(i);
            int cnt=press_button();
            if(cnt>mid){
                len--;
                move_outside(i);
                st.erase(i);
            }
        }
        if(len==d*mid){
            l=mid;
        }
        else{
            r=mid-1;
        }
        for(auto i:st){
            move_outside(i);
        }
    }
    return l;
}

• Subtask 1: 10 / 10
• Subtask 2: 15 / 15
• Subtask 3: 28.13 / 75