oj.uz

답안 #877278

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
877278 2023-11-23T05:24:30 Z simona1230 Jail (JOI22_jail) C++17
5 / 100
 2121 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)
{
    chain[i]=lead;
    pos[i]=cnt++;
    if(maxx[i])
    {
        jump[maxx[i]][0]=i;
        hld(maxx[i],lead);
    }
    for(long long j=0; j<f[i].size(); j++)
    {
        long long nb=f[i][j];
        if(pos[nb]==0)
        {
            jump[nb][0]=i;
            hld(nb,nb);
        }
    }
}
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 27 ms 121944 KB Output is correct
2 Correct 26 ms 121948 KB Output is correct
3 Correct 21 ms 121948 KB Output is correct
4 Correct 1000 ms 122360 KB Output is correct
5 Correct 2095 ms 122832 KB Output is correct
6 Correct 62 ms 121948 KB Output is correct
7 Correct 66 ms 121948 KB Output is correct
8 Correct 64 ms 121948 KB Output is correct
9 Correct 120 ms 129880 KB Output is correct
10 Correct 146 ms 190416 KB Output is correct
11 Correct 2111 ms 122292 KB Output is correct
12 Correct 2121 ms 123416 KB Output is correct
13 Correct 270 ms 212340 KB Output is correct
14 Correct 268 ms 212932 KB Output is correct
15 Correct 601 ms 233552 KB Output is correct
16 Correct 1241 ms 300852 KB Output is correct
17 Correct 345 ms 243408 KB Output is correct
18 Correct 270 ms 222596 KB Output is correct
19 Correct 317 ms 235880 KB Output is correct
20 Correct 315 ms 235712 KB Output is correct
21 Correct 371 ms 240492 KB Output is correct
22 Correct 231 ms 202836 KB Output is correct

Subtask #2
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 21 ms 121944 KB Output is correct
2 Correct 22 ms 121948 KB Output is correct
3 Correct 63 ms 121948 KB Output is correct
4 Runtime error 554 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 21 ms 121944 KB Output is correct
2 Correct 22 ms 121948 KB Output is correct
3 Correct 63 ms 121948 KB Output is correct
4 Runtime error 554 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 21 ms 121944 KB Output is correct
2 Correct 22 ms 121948 KB Output is correct
3 Correct 63 ms 121948 KB Output is correct
4 Runtime error 554 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 21 ms 121944 KB Output is correct
2 Correct 22 ms 121948 KB Output is correct
3 Correct 63 ms 121948 KB Output is correct
4 Runtime error 554 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 22 ms 121932 KB Output is correct
2 Runtime error 506 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 27 ms 121944 KB Output is correct
2 Correct 26 ms 121948 KB Output is correct
3 Correct 21 ms 121948 KB Output is correct
4 Correct 1000 ms 122360 KB Output is correct
5 Correct 2095 ms 122832 KB Output is correct
6 Correct 62 ms 121948 KB Output is correct
7 Correct 66 ms 121948 KB Output is correct
8 Correct 64 ms 121948 KB Output is correct
9 Correct 120 ms 129880 KB Output is correct
10 Correct 146 ms 190416 KB Output is correct
11 Correct 2111 ms 122292 KB Output is correct
12 Correct 2121 ms 123416 KB Output is correct
13 Correct 270 ms 212340 KB Output is correct
14 Correct 268 ms 212932 KB Output is correct
15 Correct 601 ms 233552 KB Output is correct
16 Correct 1241 ms 300852 KB Output is correct
17 Correct 345 ms 243408 KB Output is correct
18 Correct 270 ms 222596 KB Output is correct
19 Correct 317 ms 235880 KB Output is correct
20 Correct 315 ms 235712 KB Output is correct
21 Correct 371 ms 240492 KB Output is correct
22 Correct 231 ms 202836 KB Output is correct
23 Correct 21 ms 121944 KB Output is correct
24 Correct 22 ms 121948 KB Output is correct
25 Correct 63 ms 121948 KB Output is correct
26 Runtime error 554 ms 1048576 KB Execution killed with signal 9
27 Halted 0 ms 0 KB -