Submission #1014139

#	Time	Username	Problem	Language	Result	Execution time	Memory
1014139		pcc	New Home (APIO18_new_home)	C++17	10 / 100	1890 ms	797616 KiB

new_home

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


#define _all(T) T.begin(),T.end()
#define pii pair<int,int>
#define fs first
#define sc second
const int mxn = 1e6;
const int inf = 1e9;
const int lim = 1e8+10;

struct SEG{
#define mid ((l+r)>>1)
#define ls now*2+1
#define rs now*2+2
	int seg[mxn*4];
	vector<vector<pii>> op;
	SEG(){
		fill(seg,seg+mxn*4,-inf);
	}
	void modify(int now,int l,int r,int s,int e,int v){
		if(!now)op.push_back({});
		op.back().push_back(pii(now,seg[now]));
		if(l>=s&&e>=r){
			seg[now] = max(seg[now],v);
			return;
		}
		if(mid>=s)modify(ls,l,mid,s,e,v);
		if(mid<e)modify(rs,mid+1,r,s,e,v);
		return;
	}
	void undo(){
		while(!op.back().empty()){
			auto [p,v] = op.back().back();
			op.back().pop_back();
			seg[p] = v;
		}
		op.pop_back();
		return;
	}
	int getval(int now,int l,int r,int p){
		if(l == r)return seg[now];
		if(mid>=p)return max(seg[now],getval(ls,l,mid,p));
		else return max(seg[now],getval(rs,mid+1,r,p));
	}
#undef mid
#undef ls
#undef rs
};

SEG seg1,seg2;
int N,K,Q;
set<int> st[mxn];
vector<int> all;
vector<pii> req;
array<int,4> shop[mxn];
int ans[mxn];
vector<pii> tseg[mxn*4];

int main(){
	cin>>N>>K>>Q;
	for(int i = 1;i<=N;i++){
		cin>>shop[i][0]>>shop[i][1]>>shop[i][2]>>shop[i][3];//x,t,a,b
		all.push_back(shop[i][0]);
	}
	for(int i = 0;i<Q;i++){
		int l,y;
		cin>>l>>y;
		all.push_back(l);
		req.push_back(pii(l,y));
	}
	all.push_back(-inf);all.push_back(inf);
	sort(_all(all));all.resize(unique(_all(all))-all.begin());
	for(int i = 1;i<=K;i++){
		st[i].insert(0);
		st[i].insert(all.size()-1);
	}
	for(int i = 1;i<=N;i++){
		shop[i][0] = lower_bound(_all(all),shop[i][0])-all.begin();
		st[shop[i][1]].insert(shop[i][0]);
	}
	for(int i = 1;i<=K;i++){
		for(auto it = ++st[i].begin();it != st[i].end();it++){
			int l = *prev(it),r = *it;
			int mid = all[l]+(all[r]-all[l])/2;
			auto pos = upper_bound(_all(all),mid)-all.begin();
			seg1.modify(0,0,all.size(),l,pos-1,-all[l]);
			seg2.modify(0,0,all.size(),pos,r,all[r]);
		}
	}
	for(auto [pos,_] : req){
		pos = lower_bound(_all(all),pos)-all.begin();
		int ans = max(all[pos]+seg1.getval(0,0,all.size(),pos),seg2.getval(0,0,all.size(),pos)-all[pos]);
		cout<<(ans>=lim?-1:ans)<<'\n';
	}
	return 0;
}

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