oj.uz

Submission #927391

# Submission time Handle Problem Language Result Execution time Memory
927391 2024-02-14T19:44:26 Z andrei_boaca Jail (JOI22_jail) C++17
10 / 100
 3524 ms 154124 KB 
#include <bits/stdc++.h>

using namespace std;
typedef pair<int,int> pii;
int t,n,m,A[120005],B[120005],in[120005],out[120005],timp,par[120005],niv[120005],dp[21][120005],nr[120005];
bool isheavy[120005];
vector<int> muchii[120005];
vector<vector<int>> v;
vector<set<pii>> suf,active;
set<pii> vtm;
vector<vector<set<int>>> arb;
vector<int> tati;
vector<set<int>> emp;
int where[120005],poz[120005];
vector<int> stiva;
bool use[120005];
bool isancestor(int a,int b)
{
    return in[a]<=in[b]&&out[a]>=out[b];
}
int LCA(int a,int b)
{
    if(niv[a]>niv[b])
        swap(a,b);
    if(isancestor(a,b))
        return a;
    for(int i=18;i>=0;i--)
        if(dp[i][a]!=0&&!isancestor(dp[i][a],b))
            a=dp[i][a];
    return par[a];
}
int dist(int a,int b)
{
    int lca=LCA(a,b);
    return niv[a]+niv[b]-2*niv[lca];
}
void initdfs(int nod)
{
    nr[nod]=1;
    timp++;
    in[nod]=timp;
    dp[0][nod]=par[nod];
    for(int i=1;i<=18;i++)
        dp[i][nod]=dp[i-1][dp[i-1][nod]];
    int who=0,maxim=0;
    for(int i:muchii[nod])
        if(i!=par[nod])
        {
            par[i]=nod;
            niv[i]=niv[nod]+1;
            initdfs(i);
            nr[nod]+=nr[i];
            if(nr[i]>maxim)
            {
                maxim=nr[i];
                who=i;
            }
        }
    if(who!=0)
        isheavy[who]=1;
    out[nod]=timp;
}
void buildhld()
{
    for(int i=1;i<=n;i++)
    {
        bool ok=1;
        for(int j:muchii[i])
            if(j!=par[i]&&isheavy[j])
            {
                ok=0;
                break;
            }
        if(ok)
        {
            vector<int> nodes;
            int nod=i;
            while(true)
            {
                nodes.push_back(nod);
                if(!isheavy[nod])
                    break;
                nod=par[nod];
            }
            for(int i=0;i<nodes.size();i++)
            {
                where[nodes[i]]=v.size();
                poz[nodes[i]]=i;
            }
            v.push_back(nodes);
            arb.push_back(emp);
            suf.push_back(vtm);
            active.push_back(vtm);
            int lg=arb.size();
            lg--;
            arb[lg].resize(5*(int)nodes.size()+5);
        }
    }
}
void addnode(int nod,int ind,int add)
{
    int chain=where[nod];
    int p=poz[nod];
    if(add==1)
        active[chain].insert({p,ind});
    else if(active[chain].find({p,ind})!=active[chain].end())
        active[chain].erase({p,ind});
    else
        assert(false);
}
void update(int chain,int nod,int st,int dr,int a,int b,int val,int add)
{
    assert(nod<arb[chain].size());
    if(st>=a&&dr<=b)
    {
        if(add==1)
            arb[chain][nod].insert(val);
        else if(arb[chain][nod].find(val)!=arb[chain][nod].end())
            arb[chain][nod].erase(val);
        else
            assert(false);
        return;
    }
    int mij=(st+dr)/2;
    if(a<=mij)
        update(chain,nod*2,st,mij,a,b,val,add);
    if(b>mij)
        update(chain,nod*2+1,mij+1,dr,a,b,val,add);
}
void query(int chain,int nod,int st,int dr,int p)
{
    assert(nod<arb[chain].size());
    tati.push_back(nod);
    if(st==dr)
        return;
    int mij=(st+dr)/2;
    if(p<=mij)
        query(chain,nod*2,st,mij,p);
    if(p>mij)
        query(chain,nod*2+1,mij+1,dr,p);
}
void addseg(int a,int b,int ind,int add)
{
    int lca=LCA(a,b);
    while(niv[a]>=niv[lca])
    {
        int p=poz[a];
        int chain=where[a];
        int last=v[chain].size();
        last--;
        if(where[a]==where[lca])
            last=poz[lca];
        if(p<=last)
        {
            /*if(last!=(int)v[chain].size()-1)
                update(chain,1,0,(int)v[chain].size()-1,p,last,ind,add);
            else
            {
                pii x={p,ind};
                if(add==1)
                    suf[chain].insert(x);
                else if(suf[chain].find(x)!=suf[chain].end())
                    suf[chain].erase(x);
                else
                    assert(false);
            }*/
            update(chain,1,0,(int)v[chain].size()-1,p,last,ind,add);
        }
        a=par[v[chain][last]];
    }

    while(niv[b]>niv[lca])
    {
        int p=poz[b];
        int chain=where[b];
        int last=v[chain].size();
        last--;
        if(where[b]==where[lca])
            last=poz[lca]-1;
        if(p<=last)
        {
            /*if(last!=(int)v[chain].size()-1)
                update(chain,1,0,(int)v[chain].size()-1,p,last,ind,add);
            else
            {
                pii x={p,ind};
                if(add==1)
                    suf[chain].insert(x);
                else if(suf[chain].find(x)!=suf[chain].end())
                    suf[chain].erase(x);
                else
                    assert(false);
            }*/
            update(chain,1,0,(int)v[chain].size()-1,p,last,ind,add);
        }
        b=par[v[chain][last]];
    }
}
void dfs1(int nod)
{
    use[nod]=1;
    addseg(A[nod],B[nod],nod,-1);
    addnode(B[nod],nod,-1);
    int chain=where[A[nod]];
    int p=poz[A[nod]];
    /*while(!suf[chain].empty())
    {
        auto it=suf[chain].upper_bound({p,1e9});
        if(it==suf[chain].begin())
            break;
        it=prev(it);
        int x=(*it).second;
        dfs1(x);
    }*/
    tati.clear();
    query(chain,1,0,v[chain].size()-1,p);
    for(int x:tati)
    {
        while(!arb[chain][x].empty())
        {
            int y=*arb[chain][x].begin();
            dfs1(y);
        }
    }
    int a=A[nod];
    int b=B[nod];
    int lca=LCA(a,b);
    while(a!=0&&niv[a]>=niv[lca])
    {
        p=poz[a];
        chain=where[a];
        int last=v[chain].size();
        last--;
        if(where[a]==where[lca])
            last=poz[lca];
        while(!active[chain].empty())
        {
            auto it=active[chain].lower_bound({p,0});
            if(it==active[chain].end())
                break;
            if((*it).first>last)
                break;
            int x=(*it).second;
            dfs1(x);
        }
        a=par[v[chain][last]];
    }
    while(b!=0&&niv[b]>niv[lca])
    {
        p=poz[b];
        chain=where[b];
        int last=v[chain].size();
        last--;
        if(where[b]==where[lca])
            last=poz[lca]-1;
        while(!active[chain].empty())
        {
            auto it=active[chain].lower_bound({p,0});
            if(it==active[chain].end())
                break;
            if((*it).first>last)
                break;
            int x=(*it).second;
            dfs1(x);
        }
        b=par[v[chain][last]];
    }
    stiva.push_back(nod);
}
void dfs2(int nod)
{
    use[nod]=1;
    addseg(A[nod],B[nod],nod,-1);
    addnode(A[nod],nod,-1);
    int chain=where[B[nod]];
    int p=poz[B[nod]];
    /*while(!suf[chain].empty())
    {
        auto it=suf[chain].upper_bound({p,1e9});
        if(it==suf[chain].begin())
            break;
        it=prev(it);
        int x=(*it).second;
        dfs2(x);
    }*/
    tati.clear();
    query(chain,1,0,v[chain].size()-1,p);
    for(int x:tati)
    {
        while(!arb[chain][x].empty())
        {
            int y=*arb[chain][x].begin();
            dfs2(y);
        }
    }
    int a=A[nod];
    int b=B[nod];
    int lca=LCA(a,b);
    while(a!=0&&niv[a]>=niv[lca])
    {
        p=poz[a];
        chain=where[a];
        int last=v[chain].size();
        last--;
        if(where[a]==where[lca])
            last=poz[lca];
        while(!active[chain].empty())
        {
            auto it=active[chain].lower_bound({p,0});
            if(it==active[chain].end())
                break;
            if((*it).first>last)
                break;
            int x=(*it).second;
            dfs2(x);
        }
        a=par[v[chain][last]];
    }
    while(b!=0&&niv[b]>niv[lca])
    {
        p=poz[b];
        chain=where[b];
        int last=v[chain].size();
        last--;
        if(where[b]==where[lca])
            last=poz[lca]-1;
        while(!active[chain].empty())
        {
            auto it=active[chain].lower_bound({p,0});
            if(it==active[chain].end())
                break;
            if((*it).first>last)
                break;
            int x=(*it).second;
            dfs2(x);
        }
        b=par[v[chain][last]];
    }
}
void solve()
{
    cin>>n;
    timp=0;
    v.clear();
    suf.clear();
    active.clear();
    arb.clear();
    arb.shrink_to_fit();
    timp=0;
    for(int i=1;i<=n;i++)
    {
        muchii[i].clear();
        isheavy[i]=0;
    }
    for(int i=1;i<n;i++)
    {
        int a,b;
        cin>>a>>b;
        muchii[a].push_back(b);
        muchii[b].push_back(a);
    }
    niv[1]=1;
    initdfs(1);
    cin>>m;
    for(int i=1;i<=m;i++)
    {
        cin>>A[i]>>B[i];
        use[i]=0;
    }
    buildhld();
    stiva.clear();
    for(int i=1;i<=m;i++)
    {
        addseg(A[i],B[i],i,+1);
        addnode(B[i],i,+1);
    }
    for(int i=1;i<=m;i++)
        if(!use[i])
            dfs1(i);
    reverse(stiva.begin(),stiva.end());
    for(int i=1;i<=m;i++)
    {
        use[i]=0;
        addseg(A[i],B[i],i,+1);
        addnode(A[i],i,+1);
    }
    int nrcomp=0;
    for(int i:stiva)
        if(!use[i])
        {
            nrcomp++;
            dfs2(i);
        }
    if(nrcomp==m)
        cout<<"Yes\n";
    else
        cout<<"No\n";
    /*for(int i=1;i<=m;i++)
        for(int j=1;j<=m;j++)
            if(i!=j)
            {
                if(onchain(A[j],A[i],B[i]))
                {
                    edges[j].push_back(i);
                    grad[i]++;
                }
                if(onchain(B[j],A[i],B[i]))
                {
                    edges[i].push_back(j);
                    grad[j]++;
                }
            }*/

}
int main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    cin>>t;
    while(t--)
        solve();
    return 0;
}

Compilation message

jail.cpp: In function 'void buildhld()':
jail.cpp:85:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   85 |             for(int i=0;i<nodes.size();i++)
      |                         ~^~~~~~~~~~~~~
In file included from /usr/include/c++/10/cassert:44,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:33,
                 from jail.cpp:1:
jail.cpp: In function 'void update(int, int, int, int, int, int, int, int)':
jail.cpp:113:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::set<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  113 |     assert(nod<arb[chain].size());
      |            ~~~^~~~~~~~~~~~~~~~~~
jail.cpp: In function 'void query(int, int, int, int, int)':
jail.cpp:132:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::set<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  132 |     assert(nod<arb[chain].size());
      |            ~~~^~~~~~~~~~~~~~~~~~

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 16728 KB Output is correct
2 Correct 2 ms 16732 KB Output is correct
3 Correct 2 ms 16732 KB Output is correct
4 Correct 12 ms 16932 KB Output is correct
5 Correct 24 ms 16732 KB Output is correct
6 Correct 3 ms 16732 KB Output is correct
7 Correct 3 ms 16732 KB Output is correct
8 Correct 7 ms 16988 KB Output is correct
9 Correct 59 ms 19396 KB Output is correct
10 Correct 49 ms 61180 KB Output is correct
11 Correct 14 ms 16728 KB Output is correct
12 Correct 90 ms 16964 KB Output is correct
13 Correct 205 ms 80624 KB Output is correct
14 Correct 193 ms 79496 KB Output is correct
15 Correct 1143 ms 99612 KB Output is correct
16 Correct 3524 ms 154124 KB Output is correct
17 Correct 483 ms 111624 KB Output is correct
18 Correct 294 ms 78696 KB Output is correct
19 Correct 445 ms 106932 KB Output is correct
20 Correct 432 ms 106932 KB Output is correct
21 Correct 562 ms 110220 KB Output is correct
22 Correct 164 ms 69468 KB Output is correct

Subtask #2
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 16728 KB Output is correct
2 Correct 2 ms 16984 KB Output is correct
3 Correct 3 ms 16732 KB Output is correct
4 Correct 4 ms 17240 KB Output is correct
5 Correct 4 ms 16988 KB Output is correct
6 Correct 4 ms 17020 KB Output is correct
7 Correct 4 ms 17028 KB Output is correct
8 Correct 4 ms 16988 KB Output is correct
9 Correct 4 ms 16988 KB Output is correct
10 Correct 4 ms 16876 KB Output is correct
11 Correct 4 ms 16988 KB Output is correct
12 Correct 3 ms 16988 KB Output is correct
13 Correct 4 ms 16984 KB Output is correct

Subtask #3
0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 16728 KB Output is correct
2 Correct 2 ms 16984 KB Output is correct
3 Correct 3 ms 16732 KB Output is correct
4 Correct 4 ms 17240 KB Output is correct
5 Correct 4 ms 16988 KB Output is correct
6 Correct 4 ms 17020 KB Output is correct
7 Correct 4 ms 17028 KB Output is correct
8 Correct 4 ms 16988 KB Output is correct
9 Correct 4 ms 16988 KB Output is correct
10 Correct 4 ms 16876 KB Output is correct
11 Correct 4 ms 16988 KB Output is correct
12 Correct 3 ms 16988 KB Output is correct
13 Correct 4 ms 16984 KB Output is correct
14 Correct 2 ms 16732 KB Output is correct
15 Correct 2 ms 16732 KB Output is correct
16 Correct 3 ms 16728 KB Output is correct
17 Correct 4 ms 16984 KB Output is correct
18 Correct 4 ms 16988 KB Output is correct
19 Correct 3 ms 16732 KB Output is correct
20 Correct 4 ms 16824 KB Output is correct
21 Incorrect 4 ms 17048 KB Output isn't correct
22 Halted 0 ms 0 KB -

Subtask #4
0 / 28.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 16728 KB Output is correct
2 Correct 2 ms 16984 KB Output is correct
3 Correct 3 ms 16732 KB Output is correct
4 Correct 4 ms 17240 KB Output is correct
5 Correct 4 ms 16988 KB Output is correct
6 Correct 4 ms 17020 KB Output is correct
7 Correct 4 ms 17028 KB Output is correct
8 Correct 4 ms 16988 KB Output is correct
9 Correct 4 ms 16988 KB Output is correct
10 Correct 4 ms 16876 KB Output is correct
11 Correct 4 ms 16988 KB Output is correct
12 Correct 3 ms 16988 KB Output is correct
13 Correct 4 ms 16984 KB Output is correct
14 Correct 2 ms 16732 KB Output is correct
15 Correct 2 ms 16732 KB Output is correct
16 Correct 3 ms 16728 KB Output is correct
17 Correct 4 ms 16984 KB Output is correct
18 Correct 4 ms 16988 KB Output is correct
19 Correct 3 ms 16732 KB Output is correct
20 Correct 4 ms 16824 KB Output is correct
21 Incorrect 4 ms 17048 KB Output isn't correct
22 Halted 0 ms 0 KB -

Subtask #5
0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 16728 KB Output is correct
2 Correct 2 ms 16984 KB Output is correct
3 Correct 3 ms 16732 KB Output is correct
4 Correct 4 ms 17240 KB Output is correct
5 Correct 4 ms 16988 KB Output is correct
6 Correct 4 ms 17020 KB Output is correct
7 Correct 4 ms 17028 KB Output is correct
8 Correct 4 ms 16988 KB Output is correct
9 Correct 4 ms 16988 KB Output is correct
10 Correct 4 ms 16876 KB Output is correct
11 Correct 4 ms 16988 KB Output is correct
12 Correct 3 ms 16988 KB Output is correct
13 Correct 4 ms 16984 KB Output is correct
14 Correct 2 ms 16732 KB Output is correct
15 Correct 2 ms 16732 KB Output is correct
16 Correct 3 ms 16728 KB Output is correct
17 Correct 4 ms 16984 KB Output is correct
18 Correct 4 ms 16988 KB Output is correct
19 Correct 3 ms 16732 KB Output is correct
20 Correct 4 ms 16824 KB Output is correct
21 Incorrect 4 ms 17048 KB Output isn't correct
22 Halted 0 ms 0 KB -

Subtask #6
0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 16728 KB Output is correct
2 Correct 3 ms 16732 KB Output is correct
3 Correct 3 ms 16728 KB Output is correct
4 Correct 2 ms 16984 KB Output is correct
5 Correct 14 ms 16904 KB Output is correct
6 Correct 3 ms 16988 KB Output is correct
7 Correct 3 ms 16876 KB Output is correct
8 Correct 3 ms 16732 KB Output is correct
9 Incorrect 3 ms 16732 KB Output isn't correct
10 Halted 0 ms 0 KB -

Subtask #7
0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 16728 KB Output is correct
2 Correct 2 ms 16732 KB Output is correct
3 Correct 2 ms 16732 KB Output is correct
4 Correct 12 ms 16932 KB Output is correct
5 Correct 24 ms 16732 KB Output is correct
6 Correct 3 ms 16732 KB Output is correct
7 Correct 3 ms 16732 KB Output is correct
8 Correct 7 ms 16988 KB Output is correct
9 Correct 59 ms 19396 KB Output is correct
10 Correct 49 ms 61180 KB Output is correct
11 Correct 14 ms 16728 KB Output is correct
12 Correct 90 ms 16964 KB Output is correct
13 Correct 205 ms 80624 KB Output is correct
14 Correct 193 ms 79496 KB Output is correct
15 Correct 1143 ms 99612 KB Output is correct
16 Correct 3524 ms 154124 KB Output is correct
17 Correct 483 ms 111624 KB Output is correct
18 Correct 294 ms 78696 KB Output is correct
19 Correct 445 ms 106932 KB Output is correct
20 Correct 432 ms 106932 KB Output is correct
21 Correct 562 ms 110220 KB Output is correct
22 Correct 164 ms 69468 KB Output is correct
23 Correct 2 ms 16728 KB Output is correct
24 Correct 2 ms 16984 KB Output is correct
25 Correct 3 ms 16732 KB Output is correct
26 Correct 4 ms 17240 KB Output is correct
27 Correct 4 ms 16988 KB Output is correct
28 Correct 4 ms 17020 KB Output is correct
29 Correct 4 ms 17028 KB Output is correct
30 Correct 4 ms 16988 KB Output is correct
31 Correct 4 ms 16988 KB Output is correct
32 Correct 4 ms 16876 KB Output is correct
33 Correct 4 ms 16988 KB Output is correct
34 Correct 3 ms 16988 KB Output is correct
35 Correct 4 ms 16984 KB Output is correct
36 Correct 2 ms 16732 KB Output is correct
37 Correct 2 ms 16732 KB Output is correct
38 Correct 3 ms 16728 KB Output is correct
39 Correct 4 ms 16984 KB Output is correct
40 Correct 4 ms 16988 KB Output is correct
41 Correct 3 ms 16732 KB Output is correct
42 Correct 4 ms 16824 KB Output is correct
43 Incorrect 4 ms 17048 KB Output isn't correct
44 Halted 0 ms 0 KB -