Submission #918461

#	Time	Username	Problem	Language	Result	Execution time	Memory
918461		amirhoseinfar1385	Designated Cities (JOI19_designated_cities)	C++17	7 / 100	1055 ms	247996 KiB

designated_cities

#include<bits/stdc++.h>
using namespace std;
const long long maxn=200000+10;
struct yal{
	long long u,v,wu,wv,jam;
	long long getad(long long fu){
		if(fu==u){
			return v;
		}
		return u;
	}
	long long getval(long long fu){
		if(fu==u){
			return wu;
		}
		return wv;
	}
}alle[maxn];
vector<long long>adj[maxn];
long long n,val[maxn],res[maxn],suma=0,kaf=0,valpre[maxn];
deque<long long>mxd[maxn];
 
void prea(long long u=1,long long p=-1){
	for(auto x:adj[u]){
		long long v=alle[x].getad(u);
		long long wu=alle[x].getval(u);
		if(v==p){
			val[u]+=wu;
		}
		else{
			val[1]+=wu;
			val[v]-=wu;
			prea(v,u);
		}
	}
}
 
void dfsa(long long u=1,long long p=-1){
	if(p!=-1){
		val[u]+=val[p];
	}
	for(auto x:adj[u]){
		long long v=alle[x].getad(u);
		if(v!=p){
			dfsa(v,u);
		}
	}
}
 
 
void aval(){
	prea();
	dfsa();
	long long mx=0;
	for(long long i=1;i<=n;i++){
		if(val[i]>=mx){
			res[1]=val[i];
			mx=val[i];
		}
	}
}
set<pair<long long,long long>>dp[maxn];
pair<long long,long long>stf[maxn];
long long timea=0; 

void predfs(long long u,long long par=-1){
	mxd[u].push_back(0);
	mxd[u].push_back(0);
	timea++;
	stf[u].first=timea;
	for(auto x:adj[u]){
		long long v=alle[x].getad(u);
		if(v!=par){
			predfs(v,u);
			mxd[u].push_back(mxd[v].back()+alle[x].getval(v));
			sort(mxd[u].begin(),mxd[u].end());
			mxd[u].pop_front();
		}
	}
	stf[u].second=timea;
	for(auto x:adj[u]){
		long long v=alle[x].getad(u);
		if(v==par){
			valpre[stf[u].first]+=alle[x].getval(u);
			valpre[stf[u].second+1]-=alle[x].getval(u);
			valpre[0]+=alle[x].getval(v);
			valpre[stf[u].first]-=alle[x].getval(v);
			valpre[stf[u].second+1]+=alle[x].getval(v);
		}
	}
}

void dfsdown(long long u,long long par=-1,long long len=0){
	mxd[u].push_back(len);
	sort(mxd[u].begin(),mxd[u].end());
	mxd[u].pop_front();
	for(auto x:adj[u]){
		long long v=alle[x].getad(u);
		if(v!=par){
			if(mxd[u].back()==mxd[v].back()+alle[x].getval(v)){
				dfsdown(v,u,mxd[u][0]+alle[x].getval(u));
			}
			else{
				dfsdown(v,u,mxd[u].back()+alle[x].getval(u));
			}
		}
	}
}

long long getd(){
	predfs(1);
	dfsdown(1);
	for(long long i=1;i<maxn;i++){
		valpre[i]+=valpre[i-1];
	}
	long long rt=1,mx=0;
	for(long long i=1;i<=n;i++){
		if(mx<=valpre[stf[i].first]+mxd[i].back()){
			rt=i;
			mx=valpre[stf[i].first]+mxd[i].back();
		}
	}
	return rt;
}
 
void merge(long long u,long long v){
	long long fu=u;
	if((long long)dp[u].size()<dp[v].size()){
		swap(u,v);
	}
	for(auto x:dp[v]){
		dp[u].insert(x);
	}
	if(fu!=u){
		swap(dp[fu],dp[u]);
	}
}
 
void dfs(long long u,long long p=-1,long long len=0){
	if(p!=-1){
		dp[u].insert(make_pair(0,u));
	}
	for(auto x:adj[u]){
		long long v=alle[x].getad(u);
		if(v!=p){
			//cout<<"ha: "<<u<<" "<<v<<" "<<len<<endl;
			kaf+=alle[x].getval(u);
			dfs(v,u,alle[x].getval(v));
			//cout<<"salam: "<<u<<" "<<v<<endl;
			merge(u,v);			
			//cout<<"injy vas mas "<<u<<" "<<dp[u].size()<<" "<<v<<" "<<dp[v].size()<<endl;
		}
	}
	auto x=*dp[u].rbegin();
	dp[u].erase(x);
	x.first+=len;
	dp[u].insert(x);
}

void dovombebad(){
	long long g=getd();
	//cout<<"wtf: "<<g<<endl;
	dfs(g);
	//cout<<"nagooo"<<endl;
	long long ted=(long long)dp[g].size();
	res[2]=kaf;
	//cout<<"by"<<ted<<endl;
	for(long long i=2;i<=ted;i++){
		res[i]+=i!=2?res[i-1]:0+(*dp[g].rbegin()).first;
		dp[g].erase(*dp[g].rbegin());
	}
}
 
int main(){
	ios::sync_with_stdio(0);
	cin.tie(0);
	cout.tie(0);
	cin>>n;
	for(long long i=0;i<n-1;i++){
		cin>>alle[i].u>>alle[i].v>>alle[i].wv>>alle[i].wu;
		alle[i].jam=alle[i].wu+alle[i].wv;
		suma+=alle[i].wu+alle[i].wv;
		adj[alle[i].u].push_back(i);
		adj[alle[i].v].push_back(i);
	}
	long long q;
	cin>>q;
	aval();
	if(n>1){
		dovombebad();
	}
	for(long long i=1;i<=n;i++){
		res[i]=suma-res[i];
	}
	for(long long i=0;i<q;i++){
		long long d;
		cin>>d;
		cout<<res[d]<<"\n";
	}
}

Compilation message (stderr)

designated_cities.cpp: In function 'void merge(long long int, long long int)':
designated_cities.cpp:128:28: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::set<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  128 |  if((long long)dp[u].size()<dp[v].size()){
      |     ~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~

• Subtask 1: 0 / 6
• Subtask 2: 7 / 7
• Subtask 3: 0 / 9
• Subtask 4: 0 / 17
• Subtask 5: 0 / 17
• Subtask 6: 0 / 44