oj.uz

Submission #877365

# Submission time Handle Problem Language Result Execution time Memory
877365 2023-11-23T07:52:14 Z simona1230 Jail (JOI22_jail) C++17
5 / 100
 1066 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);
        if(test)assert(false);
        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();
    }
    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 72476 KB Output is correct
3 Correct 14 ms 72284 KB Output is correct
4 Correct 93 ms 72716 KB Output is correct
5 Correct 181 ms 73148 KB Output is correct
6 Correct 19 ms 72540 KB Output is correct
7 Correct 18 ms 72572 KB Output is correct
8 Correct 20 ms 72540 KB Output is correct
9 Correct 69 ms 75972 KB Output is correct
10 Correct 118 ms 123012 KB Output is correct
11 Correct 163 ms 72848 KB Output is correct
12 Correct 209 ms 73400 KB Output is correct
13 Correct 222 ms 134480 KB Output is correct
14 Correct 226 ms 134992 KB Output is correct
15 Correct 549 ms 144468 KB Output is correct
16 Correct 1066 ms 182652 KB Output is correct
17 Correct 287 ms 150352 KB Output is correct
18 Correct 234 ms 144652 KB Output is correct
19 Correct 282 ms 146772 KB Output is correct
20 Correct 271 ms 146772 KB Output is correct
21 Correct 318 ms 149108 KB Output is correct
22 Correct 180 ms 131920 KB Output is correct

Subtask #2
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 14 ms 72280 KB Output is correct
2 Correct 14 ms 72284 KB Output is correct
3 Correct 19 ms 72560 KB Output is correct
4 Runtime error 63 ms 138032 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 72280 KB Output is correct
2 Correct 14 ms 72284 KB Output is correct
3 Correct 19 ms 72560 KB Output is correct
4 Runtime error 63 ms 138032 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 72280 KB Output is correct
2 Correct 14 ms 72284 KB Output is correct
3 Correct 19 ms 72560 KB Output is correct
4 Runtime error 63 ms 138032 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 72280 KB Output is correct
2 Correct 14 ms 72284 KB Output is correct
3 Correct 19 ms 72560 KB Output is correct
4 Runtime error 63 ms 138032 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 72280 KB Output is correct
2 Correct 15 ms 72284 KB Output is correct
3 Correct 14 ms 72284 KB Output is correct
4 Correct 14 ms 72284 KB Output is correct
5 Correct 165 ms 72544 KB Output is correct
6 Correct 18 ms 72540 KB Output is correct
7 Runtime error 615 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 72476 KB Output is correct
3 Correct 14 ms 72284 KB Output is correct
4 Correct 93 ms 72716 KB Output is correct
5 Correct 181 ms 73148 KB Output is correct
6 Correct 19 ms 72540 KB Output is correct
7 Correct 18 ms 72572 KB Output is correct
8 Correct 20 ms 72540 KB Output is correct
9 Correct 69 ms 75972 KB Output is correct
10 Correct 118 ms 123012 KB Output is correct
11 Correct 163 ms 72848 KB Output is correct
12 Correct 209 ms 73400 KB Output is correct
13 Correct 222 ms 134480 KB Output is correct
14 Correct 226 ms 134992 KB Output is correct
15 Correct 549 ms 144468 KB Output is correct
16 Correct 1066 ms 182652 KB Output is correct
17 Correct 287 ms 150352 KB Output is correct
18 Correct 234 ms 144652 KB Output is correct
19 Correct 282 ms 146772 KB Output is correct
20 Correct 271 ms 146772 KB Output is correct
21 Correct 318 ms 149108 KB Output is correct
22 Correct 180 ms 131920 KB Output is correct
23 Correct 14 ms 72280 KB Output is correct
24 Correct 14 ms 72284 KB Output is correct
25 Correct 19 ms 72560 KB Output is correct
26 Runtime error 63 ms 138032 KB Execution killed with signal 6
27 Halted 0 ms 0 KB -