oj.uz

답안 #927388

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
927388 2024-02-14T19:31:44 Z andrei_boaca Jail (JOI22_jail) C++17
10 / 100
 3410 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);
        }
        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);
    for(int i=0;i<v.size();i++)
        assert(suf[i].empty()&&active[i].empty());
    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 solve()':
jail.cpp:370:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  370 |     for(int i=0;i<v.size();i++)
      |                 ~^~~~~~~~~

Subtask #1
5.0 / 5.0

# 결과 실행 시간 메모리 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 12 ms 16732 KB Output is correct
5 Correct 24 ms 16984 KB Output is correct
6 Correct 3 ms 16728 KB Output is correct
7 Correct 3 ms 16732 KB Output is correct
8 Correct 8 ms 17060 KB Output is correct
9 Correct 53 ms 19364 KB Output is correct
10 Correct 49 ms 61172 KB Output is correct
11 Correct 14 ms 16728 KB Output is correct
12 Correct 88 ms 16732 KB Output is correct
13 Correct 226 ms 80884 KB Output is correct
14 Correct 208 ms 79600 KB Output is correct
15 Correct 1157 ms 99612 KB Output is correct
16 Correct 3410 ms 154328 KB Output is correct
17 Correct 466 ms 111624 KB Output is correct
18 Correct 298 ms 78576 KB Output is correct
19 Correct 421 ms 106924 KB Output is correct
20 Correct 429 ms 106736 KB Output is correct
21 Correct 557 ms 110320 KB Output is correct
22 Correct 168 ms 69616 KB Output is correct

Subtask #2
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 17240 KB Output is correct
2 Correct 2 ms 16732 KB Output is correct
3 Correct 4 ms 16728 KB Output is correct
4 Correct 3 ms 16988 KB Output is correct
5 Correct 5 ms 16988 KB Output is correct
6 Correct 4 ms 16984 KB Output is correct
7 Correct 4 ms 16988 KB Output is correct
8 Correct 3 ms 16984 KB Output is correct
9 Correct 4 ms 16988 KB Output is correct
10 Correct 3 ms 16988 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 16988 KB Output is correct

Subtask #3
0 / 16.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 17240 KB Output is correct
2 Correct 2 ms 16732 KB Output is correct
3 Correct 4 ms 16728 KB Output is correct
4 Correct 3 ms 16988 KB Output is correct
5 Correct 5 ms 16988 KB Output is correct
6 Correct 4 ms 16984 KB Output is correct
7 Correct 4 ms 16988 KB Output is correct
8 Correct 3 ms 16984 KB Output is correct
9 Correct 4 ms 16988 KB Output is correct
10 Correct 3 ms 16988 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 16988 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 16984 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 16728 KB Output is correct
20 Correct 4 ms 16988 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

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 17240 KB Output is correct
2 Correct 2 ms 16732 KB Output is correct
3 Correct 4 ms 16728 KB Output is correct
4 Correct 3 ms 16988 KB Output is correct
5 Correct 5 ms 16988 KB Output is correct
6 Correct 4 ms 16984 KB Output is correct
7 Correct 4 ms 16988 KB Output is correct
8 Correct 3 ms 16984 KB Output is correct
9 Correct 4 ms 16988 KB Output is correct
10 Correct 3 ms 16988 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 16988 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 16984 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 16728 KB Output is correct
20 Correct 4 ms 16988 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

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 17240 KB Output is correct
2 Correct 2 ms 16732 KB Output is correct
3 Correct 4 ms 16728 KB Output is correct
4 Correct 3 ms 16988 KB Output is correct
5 Correct 5 ms 16988 KB Output is correct
6 Correct 4 ms 16984 KB Output is correct
7 Correct 4 ms 16988 KB Output is correct
8 Correct 3 ms 16984 KB Output is correct
9 Correct 4 ms 16988 KB Output is correct
10 Correct 3 ms 16988 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 16988 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 16984 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 16728 KB Output is correct
20 Correct 4 ms 16988 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

# 결과 실행 시간 메모리 Grader output
1 Correct 3 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 20 ms 16904 KB Output is correct
6 Correct 3 ms 16988 KB Output is correct
7 Correct 3 ms 16988 KB Output is correct
8 Correct 3 ms 16732 KB Output is correct
9 Correct 3 ms 16732 KB Output is correct
10 Correct 2 ms 16732 KB Output is correct
11 Correct 2 ms 16868 KB Output is correct
12 Correct 6 ms 16988 KB Output is correct
13 Incorrect 76 ms 17008 KB Output isn't correct
14 Halted 0 ms 0 KB -

Subtask #7
0 / 23.0

# 결과 실행 시간 메모리 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 12 ms 16732 KB Output is correct
5 Correct 24 ms 16984 KB Output is correct
6 Correct 3 ms 16728 KB Output is correct
7 Correct 3 ms 16732 KB Output is correct
8 Correct 8 ms 17060 KB Output is correct
9 Correct 53 ms 19364 KB Output is correct
10 Correct 49 ms 61172 KB Output is correct
11 Correct 14 ms 16728 KB Output is correct
12 Correct 88 ms 16732 KB Output is correct
13 Correct 226 ms 80884 KB Output is correct
14 Correct 208 ms 79600 KB Output is correct
15 Correct 1157 ms 99612 KB Output is correct
16 Correct 3410 ms 154328 KB Output is correct
17 Correct 466 ms 111624 KB Output is correct
18 Correct 298 ms 78576 KB Output is correct
19 Correct 421 ms 106924 KB Output is correct
20 Correct 429 ms 106736 KB Output is correct
21 Correct 557 ms 110320 KB Output is correct
22 Correct 168 ms 69616 KB Output is correct
23 Correct 2 ms 17240 KB Output is correct
24 Correct 2 ms 16732 KB Output is correct
25 Correct 4 ms 16728 KB Output is correct
26 Correct 3 ms 16988 KB Output is correct
27 Correct 5 ms 16988 KB Output is correct
28 Correct 4 ms 16984 KB Output is correct
29 Correct 4 ms 16988 KB Output is correct
30 Correct 3 ms 16984 KB Output is correct
31 Correct 4 ms 16988 KB Output is correct
32 Correct 3 ms 16988 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 16988 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 16984 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 16728 KB Output is correct
42 Correct 4 ms 16988 KB Output is correct
43 Incorrect 4 ms 16988 KB Output isn't correct
44 Halted 0 ms 0 KB -