oj.uz

Submission #927385

# Submission time Handle Problem Language Result Execution time Memory
927385 2024-02-14T19:29:42 Z andrei_boaca Jail (JOI22_jail) C++17
10 / 100
 3301 ms 154328 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});
}
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);
        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);
            }
        }
        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);
            }
        }
        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);
        }
        bool ok=0;
        if(last>=v[chain].size())
        {
            ok=1;
        }
        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);
    }
    bool ok=0;
    if(t==17)
        ok=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:111:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::set<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  111 |     assert(nod<arb[chain].size());
      |            ~~~^~~~~~~~~~~~~~~~~~
jail.cpp: In function 'void query(int, int, int, int, int)':
jail.cpp:128:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::set<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  128 |     assert(nod<arb[chain].size());
      |            ~~~^~~~~~~~~~~~~~~~~~
jail.cpp: In function 'void dfs1(int)':
jail.cpp:257:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  257 |         if(last>=v[chain].size())
      |            ~~~~^~~~~~~~~~~~~~~~~
jail.cpp:256:14: warning: variable 'ok' set but not used [-Wunused-but-set-variable]
  256 |         bool ok=0;
      |              ^~
jail.cpp: In function 'void solve()':
jail.cpp:372:10: warning: variable 'ok' set but not used [-Wunused-but-set-variable]
  372 |     bool ok=0;
      |          ^~

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 16732 KB Output is correct
2 Correct 2 ms 16884 KB Output is correct
3 Correct 3 ms 16732 KB Output is correct
4 Correct 13 ms 16732 KB Output is correct
5 Correct 25 ms 16928 KB Output is correct
6 Correct 3 ms 16728 KB Output is correct
7 Correct 4 ms 16732 KB Output is correct
8 Correct 7 ms 16988 KB Output is correct
9 Correct 55 ms 19468 KB Output is correct
10 Correct 51 ms 61100 KB Output is correct
11 Correct 14 ms 16728 KB Output is correct
12 Correct 89 ms 16952 KB Output is correct
13 Correct 208 ms 80624 KB Output is correct
14 Correct 198 ms 79584 KB Output is correct
15 Correct 1085 ms 99616 KB Output is correct
16 Correct 3301 ms 154328 KB Output is correct
17 Correct 465 ms 111764 KB Output is correct
18 Correct 291 ms 78572 KB Output is correct
19 Correct 426 ms 106996 KB Output is correct
20 Correct 419 ms 106920 KB Output is correct
21 Correct 519 ms 110068 KB Output is correct
22 Correct 164 ms 69364 KB Output is correct

Subtask #2
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 16732 KB Output is correct
2 Correct 3 ms 16732 KB Output is correct
3 Correct 3 ms 16732 KB Output is correct
4 Correct 4 ms 17024 KB Output is correct
5 Correct 3 ms 16988 KB Output is correct
6 Correct 4 ms 16988 KB Output is correct
7 Correct 3 ms 16988 KB Output is correct
8 Correct 3 ms 16988 KB Output is correct
9 Correct 4 ms 16988 KB Output is correct
10 Correct 3 ms 16888 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 16732 KB Output is correct
2 Correct 3 ms 16732 KB Output is correct
3 Correct 3 ms 16732 KB Output is correct
4 Correct 4 ms 17024 KB Output is correct
5 Correct 3 ms 16988 KB Output is correct
6 Correct 4 ms 16988 KB Output is correct
7 Correct 3 ms 16988 KB Output is correct
8 Correct 3 ms 16988 KB Output is correct
9 Correct 4 ms 16988 KB Output is correct
10 Correct 3 ms 16888 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 4 ms 16988 KB Output is correct
17 Correct 4 ms 16900 KB Output is correct
18 Correct 5 ms 16984 KB Output is correct
19 Correct 2 ms 16732 KB Output is correct
20 Correct 4 ms 16984 KB Output is correct
21 Incorrect 4 ms 16988 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 16732 KB Output is correct
2 Correct 3 ms 16732 KB Output is correct
3 Correct 3 ms 16732 KB Output is correct
4 Correct 4 ms 17024 KB Output is correct
5 Correct 3 ms 16988 KB Output is correct
6 Correct 4 ms 16988 KB Output is correct
7 Correct 3 ms 16988 KB Output is correct
8 Correct 3 ms 16988 KB Output is correct
9 Correct 4 ms 16988 KB Output is correct
10 Correct 3 ms 16888 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 4 ms 16988 KB Output is correct
17 Correct 4 ms 16900 KB Output is correct
18 Correct 5 ms 16984 KB Output is correct
19 Correct 2 ms 16732 KB Output is correct
20 Correct 4 ms 16984 KB Output is correct
21 Incorrect 4 ms 16988 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 16732 KB Output is correct
2 Correct 3 ms 16732 KB Output is correct
3 Correct 3 ms 16732 KB Output is correct
4 Correct 4 ms 17024 KB Output is correct
5 Correct 3 ms 16988 KB Output is correct
6 Correct 4 ms 16988 KB Output is correct
7 Correct 3 ms 16988 KB Output is correct
8 Correct 3 ms 16988 KB Output is correct
9 Correct 4 ms 16988 KB Output is correct
10 Correct 3 ms 16888 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 4 ms 16988 KB Output is correct
17 Correct 4 ms 16900 KB Output is correct
18 Correct 5 ms 16984 KB Output is correct
19 Correct 2 ms 16732 KB Output is correct
20 Correct 4 ms 16984 KB Output is correct
21 Incorrect 4 ms 16988 KB Output isn't correct
22 Halted 0 ms 0 KB -

Subtask #6
0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 16732 KB Output is correct
2 Correct 2 ms 16732 KB Output is correct
3 Correct 2 ms 16732 KB Output is correct
4 Correct 2 ms 16732 KB Output is correct
5 Correct 15 ms 16904 KB Output is correct
6 Correct 3 ms 16988 KB Output is correct
7 Correct 3 ms 16816 KB Output is correct
8 Correct 3 ms 16732 KB Output is correct
9 Correct 3 ms 16856 KB Output is correct
10 Correct 3 ms 16984 KB Output is correct
11 Correct 3 ms 16860 KB Output is correct
12 Correct 6 ms 17088 KB Output is correct
13 Incorrect 77 ms 17488 KB Output isn't correct
14 Halted 0 ms 0 KB -

Subtask #7
0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 16732 KB Output is correct
2 Correct 2 ms 16884 KB Output is correct
3 Correct 3 ms 16732 KB Output is correct
4 Correct 13 ms 16732 KB Output is correct
5 Correct 25 ms 16928 KB Output is correct
6 Correct 3 ms 16728 KB Output is correct
7 Correct 4 ms 16732 KB Output is correct
8 Correct 7 ms 16988 KB Output is correct
9 Correct 55 ms 19468 KB Output is correct
10 Correct 51 ms 61100 KB Output is correct
11 Correct 14 ms 16728 KB Output is correct
12 Correct 89 ms 16952 KB Output is correct
13 Correct 208 ms 80624 KB Output is correct
14 Correct 198 ms 79584 KB Output is correct
15 Correct 1085 ms 99616 KB Output is correct
16 Correct 3301 ms 154328 KB Output is correct
17 Correct 465 ms 111764 KB Output is correct
18 Correct 291 ms 78572 KB Output is correct
19 Correct 426 ms 106996 KB Output is correct
20 Correct 419 ms 106920 KB Output is correct
21 Correct 519 ms 110068 KB Output is correct
22 Correct 164 ms 69364 KB Output is correct
23 Correct 2 ms 16732 KB Output is correct
24 Correct 3 ms 16732 KB Output is correct
25 Correct 3 ms 16732 KB Output is correct
26 Correct 4 ms 17024 KB Output is correct
27 Correct 3 ms 16988 KB Output is correct
28 Correct 4 ms 16988 KB Output is correct
29 Correct 3 ms 16988 KB Output is correct
30 Correct 3 ms 16988 KB Output is correct
31 Correct 4 ms 16988 KB Output is correct
32 Correct 3 ms 16888 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 4 ms 16988 KB Output is correct
39 Correct 4 ms 16900 KB Output is correct
40 Correct 5 ms 16984 KB Output is correct
41 Correct 2 ms 16732 KB Output is correct
42 Correct 4 ms 16984 KB Output is correct
43 Incorrect 4 ms 16988 KB Output isn't correct
44 Halted 0 ms 0 KB -