Submission #756536

#	Time	Username	Problem	Language	Result	Execution time	Memory
756536		michao	Advertisement 2 (JOI23_ho_t2)	C++14	100 / 100	683 ms	65568 KiB

Main

#include <bits/stdc++.h>
#define int long long
#define mp make_pair
#define pb push_back
#define ld long double
#define pii pair<int,int>
#define sz(x) (int)x.size()
#define piii pair<pii,pii>
#define precise cout<<fixed<<setprecision(10)
#define st first
#define nd second
#define ins insert
#define vi vector<int>
#define BOOST ios_base::sync_with_stdio(false);cin.tie(0);cout.tie(0)
using namespace std;
const int inf=(int)1e18+9;
const int MAX=1<<19;
pii t[MAX*2][2];
pii merguj(pii x,pii y){
  if (x.st<=y.st)return x;
  return y;
}
int x[MAX],e[MAX];
bool cmp(int i,int j){
  if (e[i]!=e[j])return e[i]>e[j];
  return x[i]<x[j];
}

void update(int u,int c,int pos,int id){
  u+=MAX;
  t[u][id]=mp(c,pos);
  for (;u>1;u>>=1)t[u>>1][id]=merguj(t[u][id],t[u^1][id]);
}

pii query(int u,int v,int id){
  pii wyn=mp(inf,inf);
  for (u+=MAX,v+=MAX+1;u<v;u>>=1,v>>=1){
    if (u&1)wyn=merguj(wyn,t[u++][id]);
    if (v&1)wyn=merguj(wyn,t[--v][id]);
  }
  return wyn;
}
bool O[MAX];
bool check(int i,int j){
  return e[i]-e[j]>=abs(x[i]-x[j]);
}
int beka[MAX];
bool cmp2(int i,int j){
  if (x[i]!=x[j])return x[i]<x[j];
  return e[i]<e[j];
}
int idx[MAX];
int re[MAX];
int32_t main()
{
  BOOST;
  int n;
  cin>>n;
  vi pom;
  for (int i=1;i<=n;i++)pom.pb(i);
  for (int i=1;i<=n;i++)cin>>x[i]>>e[i];
  for (int i=1;i<=n;i++)beka[i]=i;
  sort(beka+1,beka+n+1,cmp2);
  for (int i=1;i<=n;i++)idx[beka[i]]=i,re[i]=beka[i];
  for (int i=1;i<=n;i++){
    update(idx[i],e[i]-x[i],idx[i],0);
    update(idx[i],e[i]+x[i],idx[i],1);
  }
  sort(pom.begin(),pom.end(),cmp);
  int ans=0;
  for (auto it:pom){
    if (O[idx[it]])continue;
   // cout<<"TERAZ "<<idx[it]<<"\n";
    O[idx[it]]=true;
    update(idx[it],inf,inf,0);
    update(idx[it],inf,inf,1);
    ans++;
    int l=idx[it]+1,r=n;
    if (l<=r){
      while (true){
        pii ask=query(l,r,1);
        if (ask.st>e[it]+x[it])break;
        int id=ask.nd;
       /* cout<<"TERAZ "<<it<<" "<<ask.st<<" "<<re[id]<<" "<<idx[it]<<" "<<id<<"\n";
        if (!check(it,re[id])){
          cout<<"KONIEC\n";
          return 0LL;
        }*/
        O[id]=true;
        update(id,inf,inf,0);
        update(id,inf,inf,1);
      }
    }
    l=1,r=idx[it]-1;
    if (l<=r){
      while (true){
        pii ask=query(l,r,0);
        if (ask.st>e[it]-x[it])break;
        int id=ask.nd;
        O[id]=true;
        /*
        cout<<"TERAZ "<<it<<" "<<re[id]<<" "<<idx[it]<<" "<<id<<"\n";
        if (!check(it,re[id])){
          cout<<"KONIEC\n";
          return 0LL;
        }*/
        update(id,inf,inf,0);
        update(id,inf,inf,1);
      }
    }
  }
  cout<<ans;
  return 0;
}

• Subtask 1: 10 / 10
• Subtask 2: 23 / 23
• Subtask 3: 36 / 36
• Subtask 4: 31 / 31