oj.uz

답안 #877289

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
877289 2023-11-23T05:45:27 Z simona1230 Jail (JOI22_jail) C++17
5 / 100
 2124 ms 1048576 KB 
#include <bits/stdc++.h>

using namespace std;
long long q,n,m;
vector<long long> f[1000001];
void read()
{
    cin>>n;
    for(long long i=1; i<=n; i++)
        f[i].clear();
    for(long long i=1; i<n; i++)
    {
        long long x,y;
        cin>>x>>y;
        f[x].push_back(y);
        f[y].push_back(x);
    }
}
long long num;
long long ts[1000001];// number of the vertex corresponding
long long te[1000001];// to the given tree and segment of the hld
long long dw[1000001];
long long up[1000001];

vector<long long> v[1000001],o[1000001];

void make_tree(long long i,long long l,long long r)
{
    if(l==r)
    {
        ts[i]=num++;
        dw[l]=ts[i];
        te[i]=num++;
        up[l]=te[i];
        //cout<<l<<" "<<r<<" "<<te[i]<<endl;
        return;
    }
    long long mid=(l+r)/2;
    ts[i]=num++;
    te[i]=num++;
    //cout<<l<<" "<<r<<" "<<te[i]<<endl;
    make_tree(i*2,l,mid);
    make_tree(i*2+1,mid+1,r);
    long long il=ts[i*2];
    long long ir=ts[i*2+1];
    v[ts[i]].push_back(il);
    v[ts[i]].push_back(ir);
    o[il].push_back(ts[i]);
    o[ir].push_back(ts[i]);
    il=te[i*2];
    ir=te[i*2+1];
    v[il].push_back(te[i]);
    v[ir].push_back(te[i]);
    o[te[i]].push_back(il);
    o[te[i]].push_back(ir);
}

long long used[1000001];
long long jump[1000001][21];
long long sz[1000001];
long long pos[1000001];// new number of vertex i in original graph
long long chain[1000001];// leader of the chain in which i is
long long maxx[1000001];
long long lvl[1000001];
void necessities(long long i,long long h)
{
    lvl[i]=h;
    sz[i]=1;
    used[i]=1;
    for(long long j=0; j<f[i].size(); j++)
    {
        long long nb=f[i][j];
        if(!used[nb])
        {
            necessities(nb,h+1);
            sz[i]+=sz[nb];
            if(sz[maxx[i]]<sz[nb])maxx[i]=nb;
        }
    }
}
long long cnt=1;
void hld(long long i,long long lead)
{
    pos[i]=cnt++;
    chain[pos[i]]=pos[lead];
    if(maxx[i])
    {
        hld(maxx[i],lead);
        jump[pos[maxx[i]]][0]=pos[i];
    }
    for(long long j=0; j<f[i].size(); j++)
    {
        long long nb=f[i][j];
        if(pos[nb]==0)
        {
            hld(nb,nb);
            jump[pos[nb]][0]=pos[i];
        }
    }
}
void prec()
{
    for(long long j=1; j<=20; j++)
    {
        for(long long i=1; i<=n; i++)
        {
            jump[i][j]=jump[jump[i][j-1]][j-1];
            //cout<<i<<" "<<j<<" "<<jump[i][j]<<endl;
        }
    }
}
long long make_jump(long long x,long long k)
{
    for(long long i=20; i>=0; i--)
        if(k&(1<<i))
            x=jump[x][i];
    return x;
}
long long lca(long long x,long long y)
{
    if(lvl[x]>lvl[y])swap(x,y);
    y=make_jump(y,abs(lvl[y]-lvl[x]));
    //cout<<x<<" "<<y<<endl;
    if(x==y)return x;
    for(long long i=20; i>=0; i--)
    {
        if(jump[x][i]!=jump[y][i])
        {
            x=jump[x][i];
            y=jump[y][i];
        }
    }
    return jump[x][0];
}
void update(long long i,long long l,long long r,long long ql,long long qr,long long pr)
{
    if(ql>qr)return;
    if(ql<=l&&r<=qr)
    {
        //cout<<l<<"-"<<r<<endl;
        long long idx=ts[i];
        //cout<<idx<<endl;
        v[pr].push_back(idx);
        o[idx].push_back(pr);
        idx=te[i];
        //cout<<idx<<endl;
        v[idx].push_back(pr);
        o[pr].push_back(idx);
        return;
    }
    long long mid=(l+r)/2;
    update(i*2,l,mid,ql,min(mid,qr),pr);
    update(i*2+1,mid+1,r,max(ql,mid+1),qr,pr);
}
void make_graph()
{
    for(long long i=1; i<=m; i++)
    {
        long long x,y;
        cin>>x>>y;
        //cout<<i<<" "<<dw[pos[x]]<<" "<<up[pos[y]]<<endl;
        v[dw[pos[x]]].push_back(i);
        o[i].push_back(dw[pos[x]]);
        v[i].push_back(up[pos[y]]);
        o[up[pos[y]]].push_back(i);
        long long ver=pos[lca(x,y)];
        long long c1=pos[x];
        while(1)
        {
            long long c2=chain[c1];
            if(lvl[c2]<lvl[ver])c2=ver;
            update(1,1,n,c2,c1,i);
            c1=c2;
            if(c2==ver)break;
            c1=jump[c1][0];
        }
        c1=pos[y];
        while(1)
        {
            long long c2=chain[c1];
            if(lvl[c2]<lvl[ver])c2=ver;
            update(1,1,n,c2,c1,i);
            c1=c2;
            if(c2==ver)break;
            c1=jump[c1][0];
        }
    }
}
long long used1[1000001];
stack<long long> st;
void dfs1(long long i)
{
    used1[i]=1;
    for(long long j=0; j<v[i].size(); j++)
    {
        long long nb=v[i][j];
        if(!used1[nb])
        {
            dfs1(nb);
        }
    }
    st.push(i);
}
long long used2[1000001];
void dfs2(long long i)
{
    used2[i]=1;
    for(long long j=0; j<o[i].size(); j++)
    {
        long long nb=o[i][j];
        if(!used2[nb])
        {
            dfs2(nb);
        }
    }
}
void check()
{
    memset(used1,0,sizeof(used1));
    memset(used2,0,sizeof(used2));
    for(long long i=1;i<=m;i++)
    {
        if(!used1[i])dfs1(i);
    }
    long long cnt=0;
    while(st.size())
    {
        long long vr=st.top();
        st.pop();
        if(vr<=m&&!used2[vr])
        {
            cnt++;
            dfs2(vr);
        }
    }
    if(cnt==m)cout<<"Yes"<<endl;
    else cout<<"No"<<endl;
}
int main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    cout.tie(NULL);
    cin>>q;
    while(q--)
    {
        for(long long i=1; i<=num; i++)
        {
            o[i].clear();
            v[i].clear();
        }
        memset(maxx,0,sizeof(maxx));
        memset(used,0,sizeof(used));
        read();
        cnt=1;
        necessities(1,1);
        hld(1,1);
        prec();
        cin>>m;
        num=m+1;
        make_tree(1,1,n);
        make_graph();
        /*for(long long i=1;i<num;i++)
        {
            cout<<i<<": ";
            for(long long j=0;j<v[i].size();j++)
                cout<<v[i][j]<<" ";
            cout<<endl;
        }*/
        check();
    }
    return 0;
}

Compilation message

jail.cpp: In function 'void necessities(long long int, long long int)':
jail.cpp:70:25: 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]
   70 |     for(long long j=0; j<f[i].size(); j++)
      |                        ~^~~~~~~~~~~~
jail.cpp: In function 'void hld(long long int, long long int)':
jail.cpp:91:25: 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]
   91 |     for(long long j=0; j<f[i].size(); j++)
      |                        ~^~~~~~~~~~~~
jail.cpp: In function 'void dfs1(long long int)':
jail.cpp:194:25: 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]
  194 |     for(long long j=0; j<v[i].size(); j++)
      |                        ~^~~~~~~~~~~~
jail.cpp: In function 'void dfs2(long long int)':
jail.cpp:208:25: 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]
  208 |     for(long long j=0; j<o[i].size(); j++)
      |                        ~^~~~~~~~~~~~

Subtask #1
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 25 ms 121952 KB Output is correct
2 Correct 25 ms 121948 KB Output is correct
3 Correct 21 ms 121948 KB Output is correct
4 Correct 986 ms 122500 KB Output is correct
5 Correct 2048 ms 122008 KB Output is correct
6 Correct 62 ms 122028 KB Output is correct
7 Correct 64 ms 122028 KB Output is correct
8 Correct 66 ms 121948 KB Output is correct
9 Correct 119 ms 128592 KB Output is correct
10 Correct 153 ms 188804 KB Output is correct
11 Correct 2104 ms 122220 KB Output is correct
12 Correct 2124 ms 122520 KB Output is correct
13 Correct 273 ms 210428 KB Output is correct
14 Correct 275 ms 211028 KB Output is correct
15 Correct 665 ms 231492 KB Output is correct
16 Correct 1265 ms 297776 KB Output is correct
17 Correct 350 ms 241200 KB Output is correct
18 Correct 269 ms 219724 KB Output is correct
19 Correct 350 ms 233852 KB Output is correct
20 Correct 333 ms 233812 KB Output is correct
21 Correct 389 ms 238408 KB Output is correct
22 Correct 204 ms 200912 KB Output is correct

Subtask #2
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 22 ms 121948 KB Output is correct
2 Correct 22 ms 121944 KB Output is correct
3 Correct 62 ms 121944 KB Output is correct
4 Runtime error 532 ms 1048576 KB Execution killed with signal 9
5 Halted 0 ms 0 KB -

Subtask #3
0 / 16.0

# 결과 실행 시간 메모리 Grader output
1 Correct 22 ms 121948 KB Output is correct
2 Correct 22 ms 121944 KB Output is correct
3 Correct 62 ms 121944 KB Output is correct
4 Runtime error 532 ms 1048576 KB Execution killed with signal 9
5 Halted 0 ms 0 KB -

Subtask #4
0 / 28.0

# 결과 실행 시간 메모리 Grader output
1 Correct 22 ms 121948 KB Output is correct
2 Correct 22 ms 121944 KB Output is correct
3 Correct 62 ms 121944 KB Output is correct
4 Runtime error 532 ms 1048576 KB Execution killed with signal 9
5 Halted 0 ms 0 KB -

Subtask #5
0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 22 ms 121948 KB Output is correct
2 Correct 22 ms 121944 KB Output is correct
3 Correct 62 ms 121944 KB Output is correct
4 Runtime error 532 ms 1048576 KB Execution killed with signal 9
5 Halted 0 ms 0 KB -

Subtask #6
0 / 11.0

# 결과 실행 시간 메모리 Grader output
1 Correct 25 ms 121948 KB Output is correct
2 Runtime error 493 ms 1048576 KB Execution killed with signal 9
3 Halted 0 ms 0 KB -

Subtask #7
0 / 23.0

# 결과 실행 시간 메모리 Grader output
1 Correct 25 ms 121952 KB Output is correct
2 Correct 25 ms 121948 KB Output is correct
3 Correct 21 ms 121948 KB Output is correct
4 Correct 986 ms 122500 KB Output is correct
5 Correct 2048 ms 122008 KB Output is correct
6 Correct 62 ms 122028 KB Output is correct
7 Correct 64 ms 122028 KB Output is correct
8 Correct 66 ms 121948 KB Output is correct
9 Correct 119 ms 128592 KB Output is correct
10 Correct 153 ms 188804 KB Output is correct
11 Correct 2104 ms 122220 KB Output is correct
12 Correct 2124 ms 122520 KB Output is correct
13 Correct 273 ms 210428 KB Output is correct
14 Correct 275 ms 211028 KB Output is correct
15 Correct 665 ms 231492 KB Output is correct
16 Correct 1265 ms 297776 KB Output is correct
17 Correct 350 ms 241200 KB Output is correct
18 Correct 269 ms 219724 KB Output is correct
19 Correct 350 ms 233852 KB Output is correct
20 Correct 333 ms 233812 KB Output is correct
21 Correct 389 ms 238408 KB Output is correct
22 Correct 204 ms 200912 KB Output is correct
23 Correct 22 ms 121948 KB Output is correct
24 Correct 22 ms 121944 KB Output is correct
25 Correct 62 ms 121944 KB Output is correct
26 Runtime error 532 ms 1048576 KB Execution killed with signal 9
27 Halted 0 ms 0 KB -