Submission #812828

#	Time	Username	Problem	Language	Result	Execution time	Memory
812828		blackyuki	드문 곤충 (IOI22_insects)	C++17	100 / 100	44 ms	272 KiB

insects

#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef pair<ll,ll> P;
typedef vector<ll> vi;
typedef vector<vi> vvi;
typedef vector<P> vp;
typedef vector<vp> vvp;
typedef vector<bool> vb;
#define rep(i,n) for(ll i=0;i<(ll)(n);i++)
#define REP(i,k,n) for(ll i=(ll)(k);i<(ll)(n);i++)
#define all(a) a.begin(),a.end()
#define fi first
#define se second
#define pb emplace_back
#define lb(v,k) (lower_bound(all(v),k)-v.begin())
template<class T> bool chmin(T&a,T b){if(a>b){a=b;return true;}return false;}
template<class T> bool chmax(T&a,T b){if(a<b){a=b;return true;}return false;}
template<class T> void out(T a){cout<<a<<'\n';}
template<class T> void outv(T v){rep(i,v.size()){if(i)cout<<' ';cout<<v[i];}cout<<'\n';}
const ll inf=1001001001001001001;
#include "insects.h"

int min_cardinality(int N) {
  vb dead(N,false),flag(N,false);
  ll cnt=0;
  auto add=[&](ll i){
    move_inside(i);
    cnt++;
    flag[i]=true;
    return press_button();
  };
  auto del=[&](ll i){
    move_outside(i);
    cnt--;
    flag[i]=false;
  };
  rep(i,N){
    if(add(i)>1)del(i);
  }
  ll s=cnt,f=1;
  ll n=N-cnt;
  dead=flag;
  while(n>=s){
    ll md=(n+s*2-1)/(s*2);
    rep(i,N)if(!dead[i]&&flag[i]&&cnt>s*f+md)del(i);
    rep(i,N)if(!dead[i]&&!flag[i]){
      if(add(i)>f+md)del(i);
    }
    if(cnt==(f+md)*s){
      f+=md;
      rep(i,N)if(!dead[i]&&flag[i]){
        n--;dead[i]=true;
      }
    }
    else{
      rep(i,N)if(!dead[i]&&!flag[i]){
        n--;dead[i]=true;
      }
    }
  }
  return f;
}

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