Submission #993513

#	Time	Username	Problem	Language	Result	Execution time	Memory
993513		Savu_Stefan_Catalin	Prize (CEOI22_prize)	C++14	100 / 100	2308 ms	637748 KiB

Main

#include <iostream>
#include <algorithm>
#include <vector>
#define int long long
using namespace std;
const int NMAX=1e6+505;
int cnt,ine[2][NMAX+5],lv[2][NMAX+5],n,t[2][NMAX+5],cen[2],invine[2][NMAX+5],k,q,T,id[NMAX+5],dp[NMAX+5],rmq[2][25][NMAX+5],imp[NMAX+5],invid[NMAX+5],rr[2][NMAX+5];
vector <int> v[2][NMAX+5];
pair<pair<int,int>,pair<int,int>> ras[NMAX+5];
int sz[NMAX+5],ap[NMAX+5],tt[NMAX+5],tv[NMAX+5],dp2[NMAX+5];
vector <pair<int,int>> vv[NMAX+5];
void dfs(int nod,int tata,int ind)
{
    ++cnt;
    ine[ind][nod]=cnt;
    lv[ind][nod]=lv[ind][tata]+1;
    for (int i=0;i<v[ind][nod].size();++i)
    {
        dfs(v[ind][nod][i],nod,ind);
    }
}
void read(int ind)
{
    for (int i=1;i<=n;++i)
    {
        cin>>t[ind][i];
        if (t[ind][i]==-1) cen[ind]=i;
        else {v[ind][t[ind][i]].push_back(i);}
    }
    cnt=0;
    dfs(cen[ind],0,ind);
    for (int i=1;i<=n;++i)
    {
        invine[ind][ine[ind][i]]=i;
    }
}
int cmp(int x,int y)
{
    return ine[1][x]<ine[1][y];
}
int lca(int x,int y,int ind)
{
    if (lv[ind][x]>lv[ind][y]) swap(x,y);
    for (int i=20;i>=0;--i) {if (lv[ind][x]+(1<<i)<=lv[ind][y]) {y=rmq[ind][i][y];}}
    if (x==y) return x;
    for (int i=20;i>=0;--i) {if (rmq[ind][i][x]!=rmq[ind][i][y]) {x=rmq[ind][i][x]; y=rmq[ind][i][y];}}
    return t[ind][x];
}
void bfs(int nod)
{
    sz[nod]=ap[nod];
    for (int i=0;i<v[1][nod].size();++i)
    {
        bfs(v[1][nod][i]);
        sz[nod]+=sz[v[1][nod][i]];
    }
}
void mfs(int nod,int tata)
{
    for (int i=0;i<v[1][nod].size();++i)
    {
        if (sz[nod]==sz[v[1][nod][i]]) {mfs(v[1][nod][i],tata); return ;}
    }
    vv[tata].push_back({nod,0});
    tt[nod]=tata;
    for (int i=0;i<v[1][nod].size();++i)
    {
        if (sz[v[1][nod][i]])
        {
            mfs(v[1][nod][i],nod);
        }
    }
}
int findfirst(int x)
{
    if (ap[x]==1) return x;
    return findfirst(vv[x][0].first);
}
int findlast(int x)
{
    if (vv[x].size()==0) return x;
    return findlast(vv[x][vv[x].size()-1].first);
}
int sum(int x,int stop)
{
    if (x==stop) return 0;
    return tv[x]+sum(tt[x],stop);
}
void lfs(int nod)
{
    if (vv[nod].size()==0)
    {
        return ;
    }
    for (int i=0;i<vv[nod].size();++i)
    {
        lfs(vv[nod][i].first);
        if (i)
        {
            int x=findlast(vv[nod][i-1].first);
            int y=findfirst(vv[nod][i].first);
            int xx=invid[x],yy=invid[y];
            vv[nod][i-1].second=ras[xx].second.first-sum(x,vv[nod][i-1].first);
            tv[vv[nod][i-1].first]=vv[nod][i-1].second;
            vv[nod][i].second=ras[xx].second.second-sum(y,vv[nod][i].first);
            tv[vv[nod][i].first]=vv[nod][i].second;
        }
    }
    if (vv[nod].size()==1)
    {
        int xx=invid[nod];
        vv[nod][0].second=ras[xx].second.second-sum(id[xx+1],vv[nod][0].first);
        tv[vv[nod][0].first]=vv[nod][0].second;
    }
}
void ylf(int nod)
{
    for (int i=0;i<vv[nod].size();++i)
    {
        dp2[vv[nod][i].first]=dp2[nod]+vv[nod][i].second;
        ylf(vv[nod][i].first);
    }
}
void solve1()
{
    for (int i=1;i<=k;++i)
    {
        ap[id[i]]=1;
    }
    bfs(cen[1]);
    mfs(cen[1],0);
    int ce=vv[0][0].first;
    lfs(ce);
    ylf(ce);
}
void solve0()
{
    int ii=0;
    for (int i=1;i<=k;++i)
    {
        if (id[i]==cen[0]) {ii=i;}
    }
    dp[ii]=0;
    for (int i=ii+1;i<=k;++i)
    {
        dp[id[i]]=dp[id[i-1]]-ras[i-1].first.first+ras[i-1].first.second;
    }
    for (int i=ii-1;i>=1;--i)
    {
        dp[id[i]]=dp[id[i+1]]-ras[i].first.second+ras[i].first.first;
    }
}
void makermq(int ind)
{
    for (int i=1;i<=n;++i)
    {
        if (t[ind][i]==-1) rmq[ind][0][i]=0;
        else rmq[ind][0][i]=t[ind][i];
    }
    for (int j=1;j<=20;++j)
    {
        for (int i=1;i<=n;++i)
        {
            rmq[ind][j][i]=rmq[ind][j-1][rmq[ind][j-1][i]];
        }
    }
}

signed main()
{
    cin>>n>>k>>q>>T;
    read(0);
    read(1);
    for (int i=1;i<=k;++i)
    {
        imp[i]=invine[0][i];
        cout<<imp[i]<<" ";
    }
        cout<<endl;
    for (int i=1;i<=k;++i)
    {
        id[i]=imp[i];
    }
    sort(id+1,id+k+1,cmp);
    for (int i=1;i<=k;++i)
    {
        invid[id[i]]=i;
    }
    for (int i=1;i<k;++i)
    {
        cout<<"? "<<id[i]<<" "<<id[i+1]<<endl;
    }
    cout<<"!"<<endl;
    for (int i=1;i<k;++i)
    {
        cin>>ras[i].first.first>>ras[i].first.second>>ras[i].second.first>>ras[i].second.second;
    }
    solve0();
    makermq(0);
    makermq(1);
    solve1();
    for (int i=1;i<=T;++i)
    {
        int x,y;
        cin>>x>>y;
        rr[1][i]=dp2[x]+dp2[y]-2*dp2[lca(x,y,1)];
        rr[0][i]=dp[x]+dp[y]-2*dp[lca(x,y,0)];
    }
    for (int i=1;i<=T;++i)
        cout<<rr[0][i]<<" "<<rr[1][i]<<'\n';
    cout.flush();
    return 0;
}

Compilation message (stderr)

Main.cpp: In function 'void dfs(long long int, long long int, long long int)':
Main.cpp:17:19: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   17 |     for (int i=0;i<v[ind][nod].size();++i)
      |                  ~^~~~~~~~~~~~~~~~~~~
Main.cpp: In function 'void bfs(long long int)':
Main.cpp:52:19: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   52 |     for (int i=0;i<v[1][nod].size();++i)
      |                  ~^~~~~~~~~~~~~~~~~
Main.cpp: In function 'void mfs(long long int, long long int)':
Main.cpp:60:19: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   60 |     for (int i=0;i<v[1][nod].size();++i)
      |                  ~^~~~~~~~~~~~~~~~~
Main.cpp:66:19: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   66 |     for (int i=0;i<v[1][nod].size();++i)
      |                  ~^~~~~~~~~~~~~~~~~
Main.cpp: In function 'void lfs(long long int)':
Main.cpp:95:19: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   95 |     for (int i=0;i<vv[nod].size();++i)
      |                  ~^~~~~~~~~~~~~~~
Main.cpp:102:29: warning: unused variable 'yy' [-Wunused-variable]
  102 |             int xx=invid[x],yy=invid[y];
      |                             ^~
Main.cpp: In function 'void ylf(long long int)':
Main.cpp:118:19: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  118 |     for (int i=0;i<vv[nod].size();++i)
      |                  ~^~~~~~~~~~~~~~~

• Subtask 1: 10 / 10
• Subtask 2: 25 / 25
• Subtask 3: 19 / 19
• Subtask 4: 22 / 22
• Subtask 5: 24 / 24