제출 #728499

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
728499		grogu	드문 곤충 (IOI22_insects)	C++17	47.50 / 100	273 ms	712 KiB

insects

#include "insects.h"
#define dbg(x) cerr<<#x<<": "<<x<<endl
#include <bits/stdc++.h>
#define ll int
#define pll pair<ll,ll>

using namespace std;
ll n;
set<ll> s;
void add(ll i){
    if(s.find(i)!=s.end()) return;
    move_inside(i);
    s.insert(i);
}
void del(ll i){
    if(s.find(i)==s.end()){
        cerr<<"out"<<endl;
        return;
    }
    move_outside(i);
    s.erase(i);
}
ll get(){return press_button();}
ll uniq = 0;
ll f(ll x){
    while(s.size()){
        del(*s.begin());
    }
    for(ll i = 0;i<n;i++){
        add(i);
        ll cur = get();
        if(cur>x) del(i);
    }
    return s.size();
}
ll min_cardinality(ll N) {
    n = N;
    uniq = f(1);
    //dbg(uniq);
    ll l = 1, r = n,mid,rez = n;
    while(l<=r){
        mid = (l+r)/2;
        if(f(mid)==uniq*mid) l = mid+1,rez = mid;
        else r = mid-1;
    }
    return rez;
}
/**
6
5 8 9 5 9 9
**/

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