Submission #496093

#	Time	Username	Problem	Language	Result	Execution time	Memory
496093		codebuster_10	Plahte (COCI17_plahte)	C++17	0 / 160	387 ms	35336 KiB

plahte

#include <bits/stdc++.h>
using namespace std;

#define int int64_t //be careful about this 

#define pr pair
#define ar array
#define f first
#define s second
#define vt vector
#define pb push_back
#define eb emplace_back
#define lb lower_bound
#define ub upper_bound

#define SZ(x) ((int)(x).size())
#define all(a) (a).begin(),(a).end()
#define allr(a) (a).rbegin(),(a).rend()
#define mem(a,b) memset(a, b, sizeof(a))

template<class A> void rd(vt<A>& v);
template<class T> void rd(T& x){ cin >> x;}
template<class H, class... T> void rd(H& h, T&... t) { rd(h); rd(t...);}
template<class A> void rd(vt<A>& x) { for(auto& a : x) rd(a);}

template<class T> bool ckmin(T& a, const T b) { return b < a ? a = b, 1 : 0;}
template<class T> bool ckmax(T& a, const T b) { return a < b ? a = b, 1 : 0;}

template<typename T>
void __p(T a) {
  cout<<a; 
}
template<typename T, typename F>
void __p(pair<T, F> a) {
  cout<<"{";
  __p(a.first);
  cout<<",";
  __p(a.second);
  cout<<"}\n"; 
}
template<typename T>
void __p(std::vector<T> a) {
  cout<<"{";
  for(auto it=a.begin(); it<a.end(); it++)
    __p(*it),cout<<",}\n"[it+1==a.end()]; 
}
template<typename T, typename ...Arg>
void __p(T a1, Arg ...a) {
  __p(a1);
  __p(a...);
}
template<typename Arg1>
void __f(const char *name, Arg1 &&arg1) {
  cout<<name<<" : ";
  __p(arg1);
  cout<<endl;
}
template<typename Arg1, typename ... Args>
void __f(const char *names, Arg1 &&arg1, Args &&... args) {
  int bracket=0,i=0;
  for(;; i++)
    if(names[i]==','&&bracket==0)
      break;
    else if(names[i]=='(')
      bracket++;
    else if(names[i]==')')
      bracket--;
  const char *comma=names+i;
  cout.write(names,comma-names)<<" : ";
  __p(arg1);
  cout<<" | ";
  __f(comma+1,args...);
}
#define trace(...) cout<<"Line:"<<__LINE__<<"  ", __f(#__VA_ARGS__, __VA_ARGS__)


void setIO(string s = "") {
  ios_base::sync_with_stdio(0); cin.tie(0); 
  cout.precision(20); cout << fixed;
  if(SZ(s)){
    freopen((s+".in").c_str(),"r",stdin);
    freopen((s+".out").c_str(),"w",stdout);
  }
}


/*/--------------------------------------------------look below-----------------------------------------------------------------------------------/*/































struct Rect{
  int a,b,c,d,id;
};

signed main(){
  setIO();
  
  int N,M;
  rd(N,M);
  vt<Rect> rect;
  for(int i = 0; i < N; ++i){
    Rect R;
    int a,b,c,d;
    rd(a,b,c,d);
    R.a=a,R.b=b,R.c=c,R.d=d,R.id=i;
    rect.pb(R);
  }

  vt<int> par(N,-1);

  {
    vt<pr<int,int>> events;
    for(int i = 0; i < N; ++i){
      events.eb(i,+1);
      events.eb(i,-1);
    }

    sort(all(events),[&](auto l,auto r){
      if(l.f == r.f)
        return l.s > r.s;
      return (l.s > 0 ? rect[l.f].a : rect[l.f].c) < (r.s > 0 ? rect[r.f].a : rect[r.f].c);
    });

    set<ar<int,3>> s;

    for(auto [i,t] : events){
      if(t < 0){
        s.erase(s.find({rect[i].b,i,-1}));
        s.erase(s.find({rect[i].d,i,+1}));
      }else{
        s.insert({rect[i].b,i,-1});
        s.insert({rect[i].d,i,+1});
        auto itr = s.find({{rect[i].b,i,-1}});
        if(itr != s.begin()){
          --itr;
          if((*itr)[2] < 0)
            par[i] = (*itr)[1];
          else
            par[i] = par[(*itr)[1]];
        }
      }
    }
  }

  vt<int> x(M),y(M),k(M);
  for(int i = 0; i < M; ++i)
    rd(x[i],y[i],k[i]);

  vt<set<int>> have(N);

  {
    vt<int> par_(N,-1);

    vt<pr<int,int>> events;
    for(int i = 0; i < N; ++i){
      events.eb(i,+1);
      events.eb(i,-1);
    }
    for(int i = 0; i < M; ++i){
      events.eb(i,0);
    }

    sort(all(events),[&](auto l,auto r){
      if(l.s != 0 && r.s != 0){
        if(l.f == r.f)
          return l.s > r.s;
        return (l.s>0?rect[l.f].a:rect[l.f].c) < (r.s>0?rect[r.f].a:rect[r.f].c);
      }else{
        if(l.s != 0)
          return (l.s>0?rect[l.f].a<=x[r.f]:rect[l.f].c<x[r.f]);
        if(r.s != 0)
          return (r.s>0?x[l.f]<rect[r.f].a:x[l.f]<=rect[r.f].c);
        return x[l.f] < x[r.f];
      }
    });

    set<ar<int,3>> s;

    for(auto [i,t] : events){
      if(t < 0){
        s.erase(s.find({rect[i].b,i,-1}));
        s.erase(s.find({rect[i].d,i,+1}));
      }else if(t == 0){
        auto itr = s.lb({y[i],-1,0});
        if(itr != s.end()){
          if((*itr)[2] > 0){
            have[(*itr)[1]].insert(k[i]);
          }else{
            if(par_[(*itr)[1]] >= 0){
              have[par_[(*itr)[1]]].insert(k[i]);
            }
          }
        }
      }else{
        s.insert({rect[i].b,i,-1});
        s.insert({rect[i].d,i,+1});
        auto itr = s.find({{rect[i].b,i,-1}});
        if(itr != s.begin()){
          --itr;
          if((*itr)[2] < 0)
            par_[i] = (*itr)[1];
          else
            par_[i] = par_[(*itr)[1]];
        }
      }
    }
  }

  vt<int> g[N];

  for(int i = 0; i < N; ++i)
    if(par[i] >= 0)
      g[par[i]].pb(i);

  vt<int> ans(N);

  function<void(int)> dfs = [&](int i) -> void {
    for(auto j : g[i]){
      dfs(j);
      if(SZ(have[i]) < SZ(have[j]))
        have[i].swap(have[j]);
      for(auto x : have[j])
        have[i].insert(x);
      have[j].clear();
    }
    ans[i] = SZ(have[i]);
  };

  for(int i = 0; i < N; ++i)
    if(par[i] < 0)
      dfs(i);

  for(auto i : ans)
    cout << i << "\n";


  
  return 0;
}







// tips to avoid bugs.

/*
  * be careful of whats happening you dont want a continue statement to miss imp line of code.
  * be careful when to update what since it might be needed in next segment of code.
  * dont get stuck on one idea.
  * dont use too much space bar so that code is written quickly as possible.
*/

Compilation message (stderr)

plahte.cpp: In function 'void setIO(std::string)':
plahte.cpp:81:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   81 |     freopen((s+".in").c_str(),"r",stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
plahte.cpp:82:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   82 |     freopen((s+".out").c_str(),"w",stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 0 / 32
• Subtask 2: 0 / 32
• Subtask 3: 0 / 32
• Subtask 4: 0 / 32
• Subtask 5: 0 / 32