Submission #859319

#	Time	Username	Problem	Language	Result	Execution time	Memory
859319		NatdanaiHS	드문 곤충 (IOI22_insects)	C++17	0 / 100	32 ms	592 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> rollback;
    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,rollback.push(i);
        else{
            cnt++;
            rollback.push(i);
        }
    }
    if(cnt==(mid-ans)*snow){
        ans=mid;
        l=mid+1;
        while(rollback.size()){
            flag[rollback.top()]=!flag[rollback.top()];
            rollback.pop();
        }
    }
    else{
        r=mid-1;
        // while(rollback.size()){
        //     move_outside(rollback.top());
        //     rollback.pop();
        // }
    }
  }
  return ans;
}

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