Submission #1211917

#	Time	Username	Problem	Language	Result	Execution time	Memory
1211917		simona1230	Rarest Insects (IOI22_insects)	C++20	0 / 100	0 ms	412 KiB

insects

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

int min_cardinality(int N)
{
    int d=0;
    vector<int> v;
    for(int i=0;i<N;i++)
    {
        move_inside(i);
        int x=press_button();
        if(x==2) move_outside(i);
        else v.push_back(i),d++;
    }

    for(int i=0;i<v.size();i++)
        move_outside(v[i]);

    vector<int> s;
    for(int i=0;i<N;i++)
        s.push_back(i);

        int b=0;
    int ans=1,l=2,r=N/d;
    while(l<=r)
    {

        int m=(l+r)/2;
        //cout<<l<<" "<<r<<" "<<m<<endl;
        vector<int> s1,s2;
        for(int i=0;i<s.size();i++)
        {
            //cout<<s[i]<<" ";
            move_inside(s[i]);
            int x=press_button();
            if(x==m+1)
            {
                s1.push_back(s[i]);
                move_outside(s[i]);
            }
            else
            {
                s2.push_back(s[i]);
            }
        }
        //cout<<endl;

        //cout<<"= "<<s2.size()<<" "<<d<<" "<<m-ans<<endl;

        if(s2.size()==d*(m-ans))
        {
            ans=m;
            s=s1;
            l=m+1;
        }
        else
        {
            for(int i=0;i<s2.size();i++)
                move_outside(s2[i]);
            r=m-1,s=s2;
        }
    }

    return ans;
}

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