Submission #1157830

#	Time	Username	Problem	Language	Result	Execution time	Memory
1157830		dibamboo23	Road Construction (JOI21_road_construction)	C++20	12 / 100	2499 ms	2151736 KiB

road_construction

/* author : Dinmukhammed ^_^ */																													

#include <bits/stdc++.h>

using namespace std;

#define F first
#define S second
#define sz size()
#define ll long long
#define ld long double


const int N=1e6+3;
const ll inf=1e18;
const ll MOD=1e9+7;

ll t[N*4],t1[N*4];

void build(int v=1,int tl=1,int tr=(int)1e6){
	t[v]=t1[v]=inf;
	if(tl==tr)return;
	int md=(tl+tr)>>1;
	build(v+v,tl,md);
	build(v+v+1,md+1,tr);
}

void upd(int pos,ll x,int v=1,int tl=1,int tr=(int)1e6){
	if(tl==tr){
		t[v]=min(x,t[v]);
		return;
	}
	int md=(tl+tr)>>1;
	if(pos<=md)upd(pos,x,v+v,tl,md);
	else upd(pos,x,v+v+1,md+1,tr);
	t[v]=min(t[v+v],t[v+v+1]);
}

void upd1(int pos,ll x,int v=1,int tl=1,int tr=(int)1e6){
	if(tl==tr){
		t1[v]=min(x,t1[v]);
		return;
	}
	int md=(tl+tr)>>1;
	if(pos<=md)upd1(pos,x,v+v,tl,md);
	else upd1(pos,x,v+v+1,md+1,tr);
	t1[v]=min(t1[v+v],t1[v+v+1]);
}

ll get(int l,int r,int v=1,int tl=1,int tr=(int)1e6){
	if(tl>=l&&tr<=r)return t[v];
	if(tl>r||l>tr)return inf;
	int md=(tl+tr)>>1;
	return min(get(l,r,v+v,tl,md),get(l,r,v+v+1,md+1,tr));
}

ll get1(int l,int r,int v=1,int tl=1,int tr=(int)1e6){
	if(tl>=l&&tr<=r)return t1[v];
	if(tl>r||l>tr)return inf;
	int md=(tl+tr)>>1;
	return min(get1(l,r,v+v,tl,md),get1(l,r,v+v+1,md+1,tr));
}

int x[N],y[N];

bool cmp(int i,int j){
	return x[i]<x[j];
}

void Main(){
	int n,k;cin>>n>>k;
	set<int>st;
	vector<int>pos;
	for(int i=1;i<=n;i++){
		cin>>x[i]>>y[i];
		st.insert(x[i]);
		st.insert(y[i]);
		pos.push_back(i);
	}
	map<int,int>mp;
	int id=0;
	for(auto to:st)mp[to]=++id;
	if(k==1){
		build();
		sort(pos.begin(),pos.end(),cmp);
		ll ans=inf;
		int id=0;
		for(auto i:pos){
			if(id!=0){
				ans=min({ans,get(1,mp[y[i]])+(ll)x[i]+(ll)y[i],get1(mp[y[i]],(int)1e6)+(ll)x[i]-(ll)y[i]});
			}
			id++;
			upd(mp[y[i]],-x[i]-y[i]);
			upd1(mp[y[i]],y[i]-x[i]);
		}
		cout<<ans;
		return;
	}
	vector<ll>v;
	for(int i=1;i<=n;i++){
		for(int j=i+1;j<=n;j++){
			v.push_back((ll)abs(x[i]-x[j])+(ll)abs(y[i]-y[j]));
		}
	}
	sort(v.begin(),v.end());
	for(int i=0;i<k;i++)cout<<v[i]<<"\n";
}



signed main(){
	ios_base::sync_with_stdio(0);cin.tie(0);
	int tt=1;
	// cin>>tt;
	while(tt--)Main(),cout<<"\n";
}

• Subtask 1: 5 / 5
• Subtask 2: 0 / 6
• Subtask 3: 7 / 7
• Subtask 4: 0 / 20
• Subtask 5: 0 / 27
• Subtask 6: 0 / 35