Submission #859341

#	Time	Username	Problem	Language	Result	Execution time	Memory
859341		NatdanaiHS	Rarest Insects (IOI22_insects)	C++17	96.54 / 100	35 ms	1172 KiB

insects

#include "insects.h"
#include <bits/stdc++.h>
using namespace std;
//move_inside
//move_outside
//press_button
vector<bool> flag(2020,false);
int ans=1,snow=1;
int min_cardinality(int N) {
  flag[0]=true;
  move_inside(0);
  //Prime Set
  for(int i=1;i<N;i++){
    move_inside(i);
    if(press_button()!=1)move_outside(i);
    else snow++,flag[i]=true;
  }
  //find ans
  int l=1,r=N/snow;
  while(l<=r){
    int mid=(l+r)/2;
    stack<int> roll;
    int cnt=0;
    for(int i=0;i<N;i++){
        if(cnt==(mid-ans)*snow)break;
        if(flag[i])continue;
        move_inside(i);
        // 
        if(press_button()>mid)move_outside(i),flag[i]=true,roll.push(i);
        else{
            cnt++;
            roll.push(i);
        }
    }
    if(cnt==(mid-ans)*snow){
        ans=mid;
        l=mid+1;
        while(roll.size()){
            flag[roll.top()]=!flag[roll.top()];
            roll.pop();
        }
    }
    else{
        r=mid-1;
        while(roll.size()){
            move_outside(roll.top());
            roll.pop();
        }
    }
  }
  return ans;
}

• Subtask 1: 10 / 10
• Subtask 2: 15 / 15
• Subtask 3: 71.54 / 75