Submission #859262

#	Time	Username	Problem	Language	Result	Execution time	Memory
859262		MasterDobby	Rarest Insects (IOI22_insects)	C++17	25 / 100	206 ms	1100 KiB

insects

#include <bits/stdc++.h>
#include "insects.h"
#define all(a) a.begin(),a.end()
#define pii pair<int,int>

using namespace std;
using ll = long long;

bitset<2020> ch;

int min_cardinality(int n){
    int cnt=1;
    ch[0]=1;
    move_inside(0);
    for(int i=1;i<n;i++){
        move_inside(i);
        int num=press_button();
        if(num==1){
            ch[i]=1;
            cnt++;
        }
        else{
            move_outside(i);
        }
    }
    int ans=1;
    for(int i=2;i<=cnt;i++){
        int cnt2=0;
        for(int j=0;j<n;j++){
            if(cnt2==cnt) break;
            if(ch[j]) continue;
            move_inside(j);
            int num=press_button();
            if(num==i){
                ch[j]=1;
                cnt2++;
            }
            else{
                move_outside(j);
            }
        }
        if(cnt2!=cnt) break;
        ans=i;
    }
    if(ans!=cnt) return ans;
    int l=cnt,r=n/cnt,now=cnt*cnt;
    while(l<r){
        int mid=(l+r+1)/2;
        int cnt2=now;
        vector<int> nw;
        for(int j=0;j<n;j++){
            if(cnt2==mid*cnt) break;
            if(ch[j]) continue;
            nw.push_back(j);
            move_inside(j);
            int num=press_button();
            if(num<=mid){
                ch[j]=1;
                cnt2++;
            }
            else{
                move_outside(j);
            }
        }
        if(cnt2==mid*cnt) l=mid,now=cnt2;
        else{
            r=mid-1;
            for(auto x:nw) move_outside(x),ch[x]=0;
        }
    }
    return l;
}

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