Submission #809013

#	Time	Username	Problem	Language	Result	Execution time	Memory
809013		BT21tata	Rarest Insects (IOI22_insects)	C++17	47.50 / 100	156 ms	380 KiB

insects

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

int uni, n;
bool inside[2005];

bool check(int x)
{
    if(x==1) return 1;
    int cnt=0;
    for(int i=0; i<n; i++)
    {
        move_inside(i);
        int cur=press_button();
        if(cur>x) move_outside(i);
        else inside[i]=1, cnt++;
    }
    if(x*uni==cnt) return 1;
    return 0;
}

int min_cardinality(int N)
{
    n=N;
    for(int i=0; i<n; i++)
    {
        move_inside(i);
        int x=press_button();
        if(x==2) move_outside(i);
        else uni++;
        inside[i]=1;
    }
    //cout<<"uni "<<uni<<endl;
    int l=1, r=n/uni;
    while(l<=r)
    {
        for(int i=0; i<n; i++)
        {
            if(inside[i]) move_outside(i);
            inside[i]=0;
        }

        int mid=(l+r)>>1;
        if(check(mid)) l=mid+1;
        else r=mid-1;
    }
    return r;
}

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