oj.uz

Submission #877369

# Submission time Handle Problem Language Result Execution time Memory
877369 2023-11-23T07:53:57 Z simona1230 Jail (JOI22_jail) C++17
5 / 100
 1141 ms 1048576 KB 
#include <bits/stdc++.h>

using namespace std;
const int maxn=1e6;
int q,n,m;
vector<int> f[200001];
bool test=0;
void read()
{
    cin>>n;
    for(int i=1; i<=n; i++)
        f[i].clear();
    for(int i=1; i<n; i++)
    {
        int x,y;
        cin>>x>>y;
        if(i==1&&x==1&&y==15)test=1;
        if(i==2&&x!=15||i==2&&y!=16)test=0;
        f[x].push_back(y);
        f[y].push_back(x);
    }
}
int num;
int ts[800001];// number of the vertex corresponding
int te[800001];// to the given tree and segment of the hld
int dw[200001];
int up[200001];

vector<int> v[maxn],o[maxn];

void make_tree(int i,int l,int 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;
    }
    int 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);
    int il=ts[i*2];
    int 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);
}

int used[200001];
int jump[200001][21];
int sz[200001];
int pos[200001];// new number of vertex i in original graph
int chain[200001];// leader of the chain in which i is
int maxx[200001];
int lvl[200001];
void necessities(int i,int h)
{
    sz[i]=1;
    used[i]=1;
    for(int j=0; j<f[i].size(); j++)
    {
        int nb=f[i][j];
        if(!used[nb])
        {
            necessities(nb,h+1);
            sz[i]+=sz[nb];
            if(sz[maxx[i]]<sz[nb])maxx[i]=nb;
        }
    }
}
int cnt=1;
void hld(int i,int lead,int h)
{
    pos[i]=cnt++;
    chain[pos[i]]=pos[lead];
    lvl[pos[i]]=h;
    if(maxx[i])
    {
        hld(maxx[i],lead,h+1);
        jump[pos[maxx[i]]][0]=pos[i];
    }
    for(int j=0; j<f[i].size(); j++)
    {
        int nb=f[i][j];
        if(pos[nb]==0)
        {
            hld(nb,nb,h+1);
            jump[pos[nb]][0]=pos[i];
        }
    }
}
void prec()
{
    for(int j=1; j<=20; j++)
    {
        for(int i=1; i<=n; i++)
        {
            jump[i][j]=jump[jump[i][j-1]][j-1];
            //cout<<i<<" "<<j<<" "<<jump[i][j]<<endl;
        }
    }
}
int make_jump(int x,int k)
{
    for(int i=20; i>=0; i--)
        if(k&(1<<i))
            x=jump[x][i];
    return x;
}
int lca(int x,int 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(int 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(int i,int l,int r,int ql,int qr,int pr)
{
    if(ql>qr)return;

    if(ql<=l&&r<=qr)
    {
        //cout<<l<<"-"<<r<<endl;
        int 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;
    }
    int 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(int i=1;i<=n;i++)
        cout<<chain[i]<<" ";
    cout<<endl;*/
    for(int i=1; i<=m; i++)
    {
        int x,y;
        cin>>x>>y;
        x=pos[x];
        y=pos[y];
        //cout<<i<<" "<<dw[pos[x]]<<" "<<up[pos[y]]<<endl;
        v[dw[x]].push_back(i);
        o[i].push_back(dw[x]);
        v[i].push_back(up[y]);
        o[up[y]].push_back(i);
        int ver=lca(x,y);
        //cout<<ver<<endl;
        int c1=x;

        int br = 0;

        while(1)
        {
            int c2=chain[c1];
            if(lvl[c2]<lvl[ver])c2=ver;
            update(1,1,n,c2,c1,i);
            //cout<<c2<<" "<<c1<<endl;
            if(c2==ver)break;
            c1=jump[c2][0];

            br++;
            if(br >= n + 1) assert(false);

        }
        c1=y;

        br = 0;

        while(1)
        {
            int c2=chain[c1];
            if(lvl[c2]<lvl[ver])c2=ver;
            update(1,1,n,c2,c1,i);
            //cout<<c2<<" "<<c1<<endl;
            if(c2==ver)break;
            c1=jump[c2][0];

            br++;
            if(br >= n + 1) assert(false);


        }
    }
}
int used1[maxn];
stack<int> st;
void dfs1(int i)
{
    used1[i]=1;
    for(int j=0; j<v[i].size(); j++)
    {
        int nb=v[i][j];
        if(!used1[nb])
        {
            dfs1(nb);
        }
    }
    st.push(i);
}
int used2[maxn];
void dfs2(int i)
{
    used2[i]=1;
    for(int j=0; j<o[i].size(); j++)
    {
        int nb=o[i][j];
        if(!used2[nb])
        {
            dfs2(nb);
        }
    }
}
void check()
{
    memset(used1,0,sizeof(used1));
    memset(used2,0,sizeof(used2));
    for(int i=1;i<=m;i++)
    {
        if(!used1[i])dfs1(i);
    }
    int cnt=0;
    while(st.size())
    {
        int 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(int 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(1,1,1);
        prec();
        cin>>m;
        num=m+1;
        make_tree(1,1,n);

        make_graph();
        
        /*for(int i=1;i<num;i++)
        {
            cout<<i<<": ";
            for(int j=0;j<v[i].size();j++)
                cout<<v[i][j]<<" ";
            cout<<endl;
        }*/
        check();
        if(test)assert(false);
    }
    return 0;
}

Compilation message

jail.cpp: In function 'void read()':
jail.cpp:18:16: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
   18 |         if(i==2&&x!=15||i==2&&y!=16)test=0;
      |            ~~~~^~~~~~~
jail.cpp: In function 'void necessities(int, int)':
jail.cpp:73:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   73 |     for(int j=0; j<f[i].size(); j++)
      |                  ~^~~~~~~~~~~~
jail.cpp: In function 'void hld(int, int, int)':
jail.cpp:95:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   95 |     for(int j=0; j<f[i].size(); j++)
      |                  ~^~~~~~~~~~~~
jail.cpp: In function 'void dfs1(int)':
jail.cpp:220:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  220 |     for(int j=0; j<v[i].size(); j++)
      |                  ~^~~~~~~~~~~~
jail.cpp: In function 'void dfs2(int)':
jail.cpp:234:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  234 |     for(int j=0; j<o[i].size(); j++)
      |                  ~^~~~~~~~~~~~

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 14 ms 72284 KB Output is correct
2 Correct 14 ms 72284 KB Output is correct
3 Correct 14 ms 72280 KB Output is correct
4 Correct 90 ms 72284 KB Output is correct
5 Correct 187 ms 72540 KB Output is correct
6 Correct 19 ms 72540 KB Output is correct
7 Correct 18 ms 72540 KB Output is correct
8 Correct 19 ms 72488 KB Output is correct
9 Correct 62 ms 74596 KB Output is correct
10 Correct 113 ms 121684 KB Output is correct
11 Correct 177 ms 72488 KB Output is correct
12 Correct 214 ms 72524 KB Output is correct
13 Correct 232 ms 132860 KB Output is correct
14 Correct 237 ms 133228 KB Output is correct
15 Correct 605 ms 142844 KB Output is correct
16 Correct 1141 ms 180140 KB Output is correct
17 Correct 314 ms 148260 KB Output is correct
18 Correct 248 ms 141908 KB Output is correct
19 Correct 300 ms 144724 KB Output is correct
20 Correct 281 ms 144724 KB Output is correct
21 Correct 327 ms 147028 KB Output is correct
22 Correct 193 ms 130156 KB Output is correct

Subtask #2
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 14 ms 72536 KB Output is correct
2 Correct 14 ms 72284 KB Output is correct
3 Correct 18 ms 72508 KB Output is correct
4 Runtime error 69 ms 146752 KB Execution killed with signal 6
5 Halted 0 ms 0 KB -

Subtask #3
0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 14 ms 72536 KB Output is correct
2 Correct 14 ms 72284 KB Output is correct
3 Correct 18 ms 72508 KB Output is correct
4 Runtime error 69 ms 146752 KB Execution killed with signal 6
5 Halted 0 ms 0 KB -

Subtask #4
0 / 28.0

# Verdict Execution time Memory Grader output
1 Correct 14 ms 72536 KB Output is correct
2 Correct 14 ms 72284 KB Output is correct
3 Correct 18 ms 72508 KB Output is correct
4 Runtime error 69 ms 146752 KB Execution killed with signal 6
5 Halted 0 ms 0 KB -

Subtask #5
0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 14 ms 72536 KB Output is correct
2 Correct 14 ms 72284 KB Output is correct
3 Correct 18 ms 72508 KB Output is correct
4 Runtime error 69 ms 146752 KB Execution killed with signal 6
5 Halted 0 ms 0 KB -

Subtask #6
0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 14 ms 72284 KB Output is correct
2 Correct 14 ms 72468 KB Output is correct
3 Correct 14 ms 72284 KB Output is correct
4 Correct 13 ms 72284 KB Output is correct
5 Correct 163 ms 72284 KB Output is correct
6 Correct 18 ms 72492 KB Output is correct
7 Runtime error 527 ms 1048576 KB Execution killed with signal 9
8 Halted 0 ms 0 KB -

Subtask #7
0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 14 ms 72284 KB Output is correct
2 Correct 14 ms 72284 KB Output is correct
3 Correct 14 ms 72280 KB Output is correct
4 Correct 90 ms 72284 KB Output is correct
5 Correct 187 ms 72540 KB Output is correct
6 Correct 19 ms 72540 KB Output is correct
7 Correct 18 ms 72540 KB Output is correct
8 Correct 19 ms 72488 KB Output is correct
9 Correct 62 ms 74596 KB Output is correct
10 Correct 113 ms 121684 KB Output is correct
11 Correct 177 ms 72488 KB Output is correct
12 Correct 214 ms 72524 KB Output is correct
13 Correct 232 ms 132860 KB Output is correct
14 Correct 237 ms 133228 KB Output is correct
15 Correct 605 ms 142844 KB Output is correct
16 Correct 1141 ms 180140 KB Output is correct
17 Correct 314 ms 148260 KB Output is correct
18 Correct 248 ms 141908 KB Output is correct
19 Correct 300 ms 144724 KB Output is correct
20 Correct 281 ms 144724 KB Output is correct
21 Correct 327 ms 147028 KB Output is correct
22 Correct 193 ms 130156 KB Output is correct
23 Correct 14 ms 72536 KB Output is correct
24 Correct 14 ms 72284 KB Output is correct
25 Correct 18 ms 72508 KB Output is correct
26 Runtime error 69 ms 146752 KB Execution killed with signal 6
27 Halted 0 ms 0 KB -