Submission #1104194

#	Time	Username	Problem	Language	Result	Execution time	Memory
1104194		8pete8	Curtains (NOI23_curtains)	C++17	100 / 100	714 ms	58552 KiB

curtains

#include<iostream>
#include<stack>
#include<map>
#include<vector>
#include<string>
#include<cassert>
#include<unordered_map>
#include <queue>
#include <cstdint>
#include<cstring>
#include<limits.h>
#include<cmath>
#include<set>
#include<algorithm>
#include <iomanip>
#include<numeric>
#include<bitset>
using namespace std;
#define ll long long
#define f first
#define s second
#define pii pair<int,int>
#define ppii pair<int,pii>
#define vi vector<int>
#define pb push_back
#define all(x) x.begin(),x.end()
#define rall(x) x.rbegin(),x.rend()
#define F(n) for(int i=0;i<n;i++)
#define lb lower_bound
#define ub upper_bound
#define fastio ios::sync_with_stdio(false);cin.tie(NULL);
#pragma GCC optimize ("03,unroll-lopps")
#define int long long
using namespace std;
const int mod=998244353,mxn=5e5+5,inf=1e18,minf=-1e18,lg=20;
//#undef int
int n,k,m,q;
void setIO(string name){		
	ios_base::sync_with_stdio(0); cin.tie(0);		
	freopen((name+".in").c_str(),"r",stdin);		
	freopen((name+".out").c_str(),"w",stdout);	
}
struct seg{
	int v[4*mxn+10],lazy[4*mxn+10];
	void build(int l,int r,int pos){
		v[pos]=lazy[pos]=inf;
		if(l==r)return;
		int mid=l+(r-l)/2;
		build(l,mid,pos*2);
		build(mid+1,r,pos*2+1);
	}
	void push(int l,int r,int pos){
		v[pos]=min(v[pos],lazy[pos]);
		if(l!=r){
			lazy[pos*2]=min(lazy[pos*2],lazy[pos]);
			lazy[pos*2+1]=min(lazy[pos*2+1],lazy[pos]);
		}
		lazy[pos]=inf;
	}
	void updaterange(int l,int r,int pos,int ql,int qr,int val){
		push(l,r,pos);
		if(l>qr||r<ql)return;
		if(l>=ql&&r<=qr){
			lazy[pos]=val;
			push(l,r,pos);
			return;
		}
		int mid=l+(r-l)/2;
		updaterange(l,mid,pos*2,ql,qr,val);
		updaterange(mid+1,r,pos*2+1,ql,qr,val);
		v[pos]=max(v[pos*2],v[pos*2+1]);
	}
	int qryrange(int l,int r,int pos,int ql,int qr){
		push(l,r,pos);
		if(l>qr||r<ql)return minf;
		if(l>=ql&&r<=qr)return v[pos];
		int mid=l+(r-l)/2;
		return max(qryrange(l,mid,pos*2,ql,qr),qryrange(mid+1,r,pos*2+1,ql,qr));
	}
}t;
int ans[mxn+10];
int32_t main(){
	fastio
	cin>>n>>m>>q;
	vector<pii>v;
	for(int i=0;i<m;i++){
		int a,b;cin>>a>>b;
		v.pb({a,b});
	}
	t.build(1,n,1);
	sort(rall(v));
	vector<pair<pii,int>>qry(q);
	for(int i=0;i<q;i++)cin>>qry[i].f.f>>qry[i].f.s,qry[i].s=i;
	sort(rall(qry));
	int cur=0;
	for(auto i:qry){
		while(cur<v.size()&&v[cur].f>=i.f.f){
			//activate cur
			t.updaterange(1,n,1,v[cur].f,v[cur].s,v[cur].s);
			cur++;
		}
		ans[i.s]=(t.qryrange(1,n,1,i.f.f,i.f.s)<=i.f.s);
	}
	for(int i=0;i<q;i++){
		if(ans[i])cout<<"YES\n";
		else cout<<"NO\n";
	}
}
/*

*/

Compilation message (stderr)

curtains.cpp:32:40: warning: bad option '-funroll-lopps' to pragma 'optimize' [-Wpragmas]
   32 | #pragma GCC optimize ("03,unroll-lopps")
      |                                        ^
curtains.cpp:38:23: warning: bad option '-funroll-lopps' to attribute 'optimize' [-Wattributes]
   38 | void setIO(string name){
      |                       ^
curtains.cpp:45:32: warning: bad option '-funroll-lopps' to attribute 'optimize' [-Wattributes]
   45 |  void build(int l,int r,int pos){
      |                                ^
curtains.cpp:52:31: warning: bad option '-funroll-lopps' to attribute 'optimize' [-Wattributes]
   52 |  void push(int l,int r,int pos){
      |                               ^
curtains.cpp:60:60: warning: bad option '-funroll-lopps' to attribute 'optimize' [-Wattributes]
   60 |  void updaterange(int l,int r,int pos,int ql,int qr,int val){
      |                                                            ^
curtains.cpp:73:48: warning: bad option '-funroll-lopps' to attribute 'optimize' [-Wattributes]
   73 |  int qryrange(int l,int r,int pos,int ql,int qr){
      |                                                ^
curtains.cpp:82:14: warning: bad option '-funroll-lopps' to attribute 'optimize' [-Wattributes]
   82 | int32_t main(){
      |              ^
curtains.cpp: In function 'int32_t main()':
curtains.cpp:97:12: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   97 |   while(cur<v.size()&&v[cur].f>=i.f.f){
      |         ~~~^~~~~~~~~
curtains.cpp: In function 'void setIO(std::string)':
curtains.cpp:40:9: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   40 |  freopen((name+".in").c_str(),"r",stdin);
      |  ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
curtains.cpp:41:9: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   41 |  freopen((name+".out").c_str(),"w",stdout);
      |  ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 3 / 3
• Subtask 2: 6 / 6
• Subtask 3: 15 / 15
• Subtask 4: 20 / 20
• Subtask 5: 36 / 36
• Subtask 6: 20 / 20