Submission #574213

#	Time	Username	Problem	Language	Result	Execution time	Memory
574213		groshi	Factories (JOI14_factories)	C++17	0 / 100	3780 ms	236668 KiB

factories

#include<algorithm>
#include<utility>
#include "factories.h"
using namespace std;
struct wi{
    vector<int> Q;
    vector<int> nowy;
    int pre=0,post=0;
    int rodzaj=0;
    long long suma[21];
    int t[21];
    int poz=0;
    long long dp[3];
    bool byl=0;
}*w;
vector<pair<int,int> > mam,jedno;
vector<int> pomoc;
int pree=1,postt=1;
void dodaj(int x)
{
    for(int i=1;i<=20;i++)
    {
        w[x].t[i]=w[w[x].t[i-1]].t[i-1];
        w[x].suma[i]=w[x].suma[i-1]+w[w[x].t[i-1]].suma[i-1];
    }
}
void dfs(int x,int ojc)
{
    w[x].pre=pree;
    pree++;
    for(int i=0;i<w[x].Q.size();i+=2)
    {
        int pom=w[x].Q[i];
        if(pom==ojc)
            continue;
        w[pom].t[0]=x;
        w[pom].suma[0]=w[x].Q[i+1];
        w[pom].poz=w[x].poz+1;
        dodaj(pom);
        dfs(pom,x);
    }
    w[x].post=postt;
    postt++;
}
long long wynik=1e18;
void dfs2(int x,int ojc)
{
    //cout<<x<<" "<<ojc<<"\n";
    w[x].dp[1]=1e18;
    w[x].dp[2]=1e18;
    for(int i=0;i<w[x].nowy.size();i+=2)
    {
        int pom=w[x].nowy[i];
        if(pom==ojc)
            continue;
        dfs2(pom,x);
        w[x].dp[1]=min(w[x].dp[1],w[pom].dp[1]+w[x].nowy[i+1]);
        w[x].dp[2]=min(w[x].dp[2],w[pom].dp[2]+w[x].nowy[i+1]);
    }
    w[x].dp[w[x].rodzaj]=0;
    wynik=min(wynik,w[x].dp[1]+w[x].dp[2]);
}
pair<int,int> lca(int x,int y)
{
    if(w[x].poz>w[y].poz)
        swap(x,y);
    long long wynik=0;
    for(int i=20;i>=0;i--)
    if(w[w[y].t[i]].poz>=w[x].poz)
    {
    wynik+=w[y].suma[i];
    y=w[y].t[i];
    }
    if(x==y)
        return {wynik,x};
    for(int i=20;i>=0;i--)
    if(w[x].t[i]!=w[y].t[i])
    {
        wynik+=w[x].suma[i];
        wynik+=w[y].suma[i];
        x=w[x].t[i];
        y=w[y].t[i];
    }
    if(x==y)
        return {wynik,x};
    else return {wynik+w[x].suma[0]+w[y].suma[0],w[x].t[0]};
}
void Init(int n,int a[],int b[],int c[])
{
    int x,y,z;
    w=new wi[n+3];
    for(int i=1;i<n;i++)
    {
        x=a[i-1];
        y=b[i-1];
        z=c[i-1];
        w[x].Q.push_back(y);
        w[y].Q.push_back(x);
        w[x].Q.push_back(z);
        w[y].Q.push_back(z);
    }
    dfs(0,-1);
}
long long Query(int S,int a[],int T,int b[])
{
    int x;
        wynik=1e18;
        mam.clear();
        pomoc.clear();
        jedno.clear();
        for(int i=1;i<=S;i++)
        {
            x=a[i-1];
            w[x].rodzaj=1;
            jedno.push_back({w[x].pre,x});
            w[x].nowy.clear();
        }
        for(int i=1;i<=T;i++)
        {
            x=b[i-1];
            w[x].rodzaj=2;
            jedno.push_back({w[x].pre,x});
            w[x].nowy.clear();
        }
        sort(jedno.begin(),jedno.end());
        int mam=jedno.size();
        for(int i=0;i<mam-1;i++)///+/-
        {
            pair<int,int> jest=lca(jedno[i].second,jedno[i+1].second);
            jedno.push_back({w[jest.second].pre,jest.second});
        }
        sort(jedno.begin(),jedno.end());
        pomoc.push_back(jedno[0].second);
        //cout<<"zyje\n";
        w[jedno[0].second].byl=1;
        for(int i=1;i<jedno.size();i++)
        {
            x=jedno[i].second;
            if(w[x].byl==1)
                continue;
            w[x].byl=1;
           // cout<<"mam "<<x<<"\n";
            while(pomoc.size()>0 && w[x].post>w[pomoc.back()].post)
                pomoc.pop_back();
            //if(pomoc.size()==0)
                //cout<<"zle\n";
            //cout<<"krawedz "<<pomoc.back()<<" "<<x<<" ";
            int odl=lca(pomoc.back(),x).first;
            //cout<<odl<<"\n";
            w[pomoc.back()].nowy.push_back(x);
            w[x].nowy.push_back(pomoc.back());
            w[pomoc.back()].nowy.push_back(odl);
            w[x].nowy.push_back(odl);
            pomoc.push_back(x);
        }
        dfs2(jedno[0].second,-1);
        //cout<<"koniec\n";
        for(int i=0;i<jedno.size();i++)
        {
            w[jedno[i].second].nowy.clear();
            w[jedno[i].second].dp[1]=1e18;
            w[jedno[i].second].dp[2]=1e18;
            w[jedno[i].second].byl=0;
            w[jedno[i].second].rodzaj=0;
        }
        return wynik;
}

Compilation message (stderr)

factories.cpp: In function 'void dfs(int, int)':
factories.cpp:31:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   31 |     for(int i=0;i<w[x].Q.size();i+=2)
      |                 ~^~~~~~~~~~~~~~
factories.cpp: In function 'void dfs2(int, int)':
factories.cpp:51:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   51 |     for(int i=0;i<w[x].nowy.size();i+=2)
      |                 ~^~~~~~~~~~~~~~~~~
factories.cpp: In function 'long long int Query(int, int*, int, int*)':
factories.cpp:136:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  136 |         for(int i=1;i<jedno.size();i++)
      |                     ~^~~~~~~~~~~~~
factories.cpp:158:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  158 |         for(int i=0;i<jedno.size();i++)
      |                     ~^~~~~~~~~~~~~

• Subtask 1: 0 / 15
• Subtask 2: 0 / 18
• Subtask 3: 0 / 67