Submission #53259

#	Time	Username	Problem	Language	Result	Execution time	Memory
53259		zetapi	New Home (APIO18_new_home)	C++14	10 / 100	4230 ms	1095252 KiB

new_home

#include <bits/stdc++.h>
using namespace std;
 
#define pb  push_back
#define mp  make_pair
#define int long long
#define itr ::iterator 
 
typedef pair<int,int>  pii;
 
const int MAX=1e7;
const int INF=1e8;
 
struct data
{
	int val;
	int left;
	int right;
}  	seg[MAX],seg_[MAX];

multiset<int> st[MAX];
multiset<int> itr it,nxt,pre;

vector<int> vec[MAX];

vector<pii> order;

vector< pair<int,pii> > ask;

int N,K,Q,X,Y,n,t,timer,timers,ptr,type[MAX],loc[MAX],res[MAX];
 
int get(int X,int Y)
{
	return Y-X;
}
 
int gets(int X,int Y)
{
	if(!Y)
		return 0;
	return X-Y;
}
 
void UpdateNeg(int low,int high,int node,int qlow,int delta)
{	
	if(low>high or qlow>high)
		return ;
	if(qlow<=low)
	{
		seg[node].val=max(seg[node].val,delta);
		return ;
	}
	if(!seg[node].left)
		seg[node].left=++timer;
	if(!seg[node].right)
		seg[node].right=++timer;
	int mid=(low+high)/2;
	UpdateNeg(low,mid,seg[node].left,qlow,delta);
	UpdateNeg(mid+1,high,seg[node].right,qlow,delta);
	return ;
}
 
void UpdatePos(int low,int high,int node,int qhigh,int delta)
{
	if(low>high or low>qhigh)
		return ;
	if(high<=qhigh)
	{
		if(!seg_[node].val)
			seg_[node].val=delta;
		else
			seg_[node].val=min(seg_[node].val,delta);
		return ;
	}
	if(!seg_[node].left)
		seg_[node].left=++timers;
	if(!seg_[node].right)
		seg_[node].right=++timers;
	int mid=(low+high)/2;
	UpdatePos(low,mid,seg_[node].left,qhigh,delta);
	UpdatePos(mid+1,high,seg_[node].right,qhigh,delta);
	return ;
}
 
int QueryNeg(int low,int high,int node,int idx)
{
	if(!node)
		return 0;
	if(low==high)
		return get(idx,seg[node].val);
	int mid=(low+high)/2;
	if(idx>=low and idx<=mid)
		return max(get(idx,seg[node].val),QueryNeg(low,mid,seg[node].left,idx));
	else
		return max(get(idx,seg[node].val),QueryNeg(mid+1,high,seg[node].right,idx));
}
 
int QueryPos(int low,int high,int node,int idx)
{
	if(!node)
		return 0;
	if(low==high)
		return gets(idx,seg_[node].val);
	int mid=(low+high)/2;
	if(idx>=low and idx<=mid)
		return max(gets(idx,seg_[node].val),QueryPos(low,mid,seg_[node].left,idx));
	else
		return max(gets(idx,seg_[node].val),QueryPos(mid+1,high,seg_[node].right,idx));
}
 
void exclude(int ind)
{
	int CurType=type[ind],CurLoc=loc[ind];
	it=st[CurType].find(CurLoc);
	if(it==st[CurType].begin() and (++it)==st[CurType].end())
	{
		UpdateNeg(1,n,1,1,INF);
		st[CurType].erase(--it);
		return ;
	}
	--it;
	if(it==st[CurType].begin())
	{
		nxt=it;
		++nxt;
		UpdateNeg(1,n,1,1,*nxt);
		st[CurType].erase(it);
	}
	else if((++it)==st[CurType].end())
	{
		--it;
		pre=it;
		--pre;
		UpdatePos(1,n,1,n,*pre);
		st[CurType].erase(it);
	}
	else
	{
		pre=it;
		nxt=it;
		--pre;
		++nxt;
		UpdatePos(1,n,1,(*pre+*nxt)/2,*pre);
		UpdateNeg(1,n,1,(*pre+*nxt+1)/2,*nxt);	
		st[CurType].erase(it);
	}
	return ;
}

signed main()
{
	ios_base::sync_with_stdio(false);
 
	n=INF;
	timer=1;
	timers=1;
	cin>>N>>K>>Q;
	for(int A=1;A<=N;A++)
	{
		cin>>loc[A]>>type[A]>>X>>X;
		vec[type[A]].pb(loc[A]);
		st[type[A]].insert(loc[A]);
		order.pb(mp(X,A));
	}
	sort(order.begin(),order.end());
	for(int A=1;A<=K;A++)
	{
		if(vec[A].empty())
		{
			while(Q--)
				cout<<-1<<"\n";
			return 0;
		}
		sort(vec[A].begin(),vec[A].end());
		for(int B=1;B<vec[A].size();B++)
			UpdateNeg(1,n,1,(vec[A][B]+vec[A][B-1]+1)/2,vec[A][B]);
		for(int B=0;B<vec[A].size()-1;B++)
			UpdatePos(1,n,1,(vec[A][B]+vec[A][B+1])/2,vec[A][B]);
		UpdateNeg(1,n,1,1,*vec[A].begin());
		UpdatePos(1,n,1,n,vec[A].back());
	}
	for(int A=1;A<=Q;A++)
	{
		cin>>X>>Y;
		ask.pb(mp(Y,mp(X,A)));
	}
	sort(ask.begin(),ask.end());
	for(auto A:ask)
	{
		while(ptr<order.size() and order[ptr].first<A.first)
		{
			exclude(order[ptr].second);
			++ptr;
		}
		res[A.second.second]=max(QueryPos(1,n,1,A.second.first),QueryNeg(1,n,1,A.second.first));
	}
	for(int A=1;A<=Q;A++)
	{
		if(res[A]==INF)
			res[A]=-1;
		cout<<res[A]<<"\n";
	}
	return 0;
}

Compilation message (stderr)

new_home.cpp: In function 'int main()':
new_home.cpp:175:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(int B=1;B<vec[A].size();B++)
               ~^~~~~~~~~~~~~~
new_home.cpp:177:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(int B=0;B<vec[A].size()-1;B++)
               ~^~~~~~~~~~~~~~~~
new_home.cpp:190:12: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   while(ptr<order.size() and order[ptr].first<A.first)
         ~~~^~~~~~~~~~~~~

• Subtask 1: 0 / 5
• Subtask 2: 0 / 7
• Subtask 3: 10 / 10
• Subtask 4: 0 / 23
• Subtask 5: 0 / 35
• Subtask 6: 0 / 20