oj.uz

답안 #877443

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
877443 2023-11-23T08:41:08 Z simona1230 Jail (JOI22_jail) C++17
21 / 100
 1027 ms 113136 KB 
#include <bits/stdc++.h>

using namespace std;
const int maxn= 120005;
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;
        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(r<ql||l>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,qr,pr);
    update(i*2+1,mid+1,r,ql,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()
{
    for(int i=1;i<=m;i++)
    {
        if(!used1[i])dfs1(i);
    }
    int cnt1=0;
    while(st.size())
    {
        int vr=st.top();
        st.pop();
        if(vr<=m&&!used2[vr])
        {
            cnt1++;
            dfs2(vr);
        }
    }
    if(cnt1==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--)
    {
        test=0;
        for(int i=1; i<maxn; i++)
        {
            o[i].clear();
            v[i].clear();
        }
        memset(maxx,0,sizeof(maxx));
        memset(used,0,sizeof(used));
        memset(pos,0,sizeof(pos));
        memset(used1,0,sizeof(used1));
        memset(used2,0,sizeof(used2));
        memset(chain,0,sizeof(chain));
        memset(ts,0,sizeof(ts));
        memset(te,0,sizeof(te));
        memset(sz,0,sizeof(sz));
        memset(dw,0,sizeof(dw));
        memset(up,0,sizeof(up));
        memset(lvl,0,sizeof(lvl));

        read();
        for(int i=1;i<=n;i++)
            for(int j=0;j<=20;j++)
                jump[i][j]=0;
        cnt=1;
        necessities(1,1);
        hld(1,1,1);
        cnt--;
        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();
    }
    return 0;
}

Compilation message

jail.cpp: In function 'void necessities(int, int)':
jail.cpp:71:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   71 |     for(int j=0; j<f[i].size(); j++)
      |                  ~^~~~~~~~~~~~
jail.cpp: In function 'void hld(int, int, int)':
jail.cpp:93:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   93 |     for(int j=0; j<f[i].size(); j++)
      |                  ~^~~~~~~~~~~~
jail.cpp: In function 'void dfs1(int)':
jail.cpp:218:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  218 |     for(int j=0; j<v[i].size(); j++)
      |                  ~^~~~~~~~~~~~
jail.cpp: In function 'void dfs2(int)':
jail.cpp:232:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  232 |     for(int j=0; j<o[i].size(); j++)
      |                  ~^~~~~~~~~~~~

Subtask #1
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 5 ms 26200 KB Output is correct
2 Correct 7 ms 26204 KB Output is correct
3 Correct 5 ms 26204 KB Output is correct
4 Correct 486 ms 26632 KB Output is correct
5 Correct 1024 ms 26964 KB Output is correct
6 Correct 25 ms 26204 KB Output is correct
7 Correct 25 ms 26204 KB Output is correct
8 Correct 28 ms 26460 KB Output is correct
9 Correct 81 ms 29724 KB Output is correct
10 Runtime error 91 ms 113136 KB Execution killed with signal 11
11 Halted 0 ms 0 KB -

Subtask #2
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 5 ms 26168 KB Output is correct
2 Correct 5 ms 26204 KB Output is correct
3 Correct 29 ms 26460 KB Output is correct
4 Correct 26 ms 26200 KB Output is correct
5 Correct 25 ms 26404 KB Output is correct
6 Correct 26 ms 26204 KB Output is correct
7 Correct 26 ms 26204 KB Output is correct
8 Correct 25 ms 26408 KB Output is correct
9 Correct 28 ms 26204 KB Output is correct
10 Correct 26 ms 26656 KB Output is correct
11 Correct 22 ms 26204 KB Output is correct
12 Correct 27 ms 26204 KB Output is correct
13 Correct 25 ms 26204 KB Output is correct

Subtask #3
16.0 / 16.0

# 결과 실행 시간 메모리 Grader output
1 Correct 5 ms 26168 KB Output is correct
2 Correct 5 ms 26204 KB Output is correct
3 Correct 29 ms 26460 KB Output is correct
4 Correct 26 ms 26200 KB Output is correct
5 Correct 25 ms 26404 KB Output is correct
6 Correct 26 ms 26204 KB Output is correct
7 Correct 26 ms 26204 KB Output is correct
8 Correct 25 ms 26408 KB Output is correct
9 Correct 28 ms 26204 KB Output is correct
10 Correct 26 ms 26656 KB Output is correct
11 Correct 22 ms 26204 KB Output is correct
12 Correct 27 ms 26204 KB Output is correct
13 Correct 25 ms 26204 KB Output is correct
14 Correct 6 ms 26200 KB Output is correct
15 Correct 7 ms 26200 KB Output is correct
16 Correct 28 ms 26444 KB Output is correct
17 Correct 26 ms 26204 KB Output is correct
18 Correct 27 ms 26204 KB Output is correct
19 Correct 25 ms 26260 KB Output is correct
20 Correct 25 ms 26204 KB Output is correct
21 Correct 25 ms 26200 KB Output is correct
22 Correct 28 ms 26460 KB Output is correct
23 Correct 24 ms 26204 KB Output is correct
24 Correct 24 ms 26204 KB Output is correct
25 Correct 26 ms 26204 KB Output is correct
26 Correct 24 ms 26348 KB Output is correct
27 Correct 25 ms 26400 KB Output is correct
28 Correct 24 ms 26204 KB Output is correct

Subtask #4
0 / 28.0

# 결과 실행 시간 메모리 Grader output
1 Correct 5 ms 26168 KB Output is correct
2 Correct 5 ms 26204 KB Output is correct
3 Correct 29 ms 26460 KB Output is correct
4 Correct 26 ms 26200 KB Output is correct
5 Correct 25 ms 26404 KB Output is correct
6 Correct 26 ms 26204 KB Output is correct
7 Correct 26 ms 26204 KB Output is correct
8 Correct 25 ms 26408 KB Output is correct
9 Correct 28 ms 26204 KB Output is correct
10 Correct 26 ms 26656 KB Output is correct
11 Correct 22 ms 26204 KB Output is correct
12 Correct 27 ms 26204 KB Output is correct
13 Correct 25 ms 26204 KB Output is correct
14 Correct 6 ms 26200 KB Output is correct
15 Correct 7 ms 26200 KB Output is correct
16 Correct 28 ms 26444 KB Output is correct
17 Correct 26 ms 26204 KB Output is correct
18 Correct 27 ms 26204 KB Output is correct
19 Correct 25 ms 26260 KB Output is correct
20 Correct 25 ms 26204 KB Output is correct
21 Correct 25 ms 26200 KB Output is correct
22 Correct 28 ms 26460 KB Output is correct
23 Correct 24 ms 26204 KB Output is correct
24 Correct 24 ms 26204 KB Output is correct
25 Correct 26 ms 26204 KB Output is correct
26 Correct 24 ms 26348 KB Output is correct
27 Correct 25 ms 26400 KB Output is correct
28 Correct 24 ms 26204 KB Output is correct
29 Correct 27 ms 26460 KB Output is correct
30 Correct 27 ms 26468 KB Output is correct
31 Correct 30 ms 26460 KB Output is correct
32 Correct 28 ms 26204 KB Output is correct
33 Correct 26 ms 26200 KB Output is correct
34 Correct 28 ms 26460 KB Output is correct
35 Correct 28 ms 26460 KB Output is correct
36 Correct 26 ms 26448 KB Output is correct
37 Incorrect 26 ms 26412 KB Output isn't correct
38 Halted 0 ms 0 KB -

Subtask #5
0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 5 ms 26168 KB Output is correct
2 Correct 5 ms 26204 KB Output is correct
3 Correct 29 ms 26460 KB Output is correct
4 Correct 26 ms 26200 KB Output is correct
5 Correct 25 ms 26404 KB Output is correct
6 Correct 26 ms 26204 KB Output is correct
7 Correct 26 ms 26204 KB Output is correct
8 Correct 25 ms 26408 KB Output is correct
9 Correct 28 ms 26204 KB Output is correct
10 Correct 26 ms 26656 KB Output is correct
11 Correct 22 ms 26204 KB Output is correct
12 Correct 27 ms 26204 KB Output is correct
13 Correct 25 ms 26204 KB Output is correct
14 Correct 6 ms 26200 KB Output is correct
15 Correct 7 ms 26200 KB Output is correct
16 Correct 28 ms 26444 KB Output is correct
17 Correct 26 ms 26204 KB Output is correct
18 Correct 27 ms 26204 KB Output is correct
19 Correct 25 ms 26260 KB Output is correct
20 Correct 25 ms 26204 KB Output is correct
21 Correct 25 ms 26200 KB Output is correct
22 Correct 28 ms 26460 KB Output is correct
23 Correct 24 ms 26204 KB Output is correct
24 Correct 24 ms 26204 KB Output is correct
25 Correct 26 ms 26204 KB Output is correct
26 Correct 24 ms 26348 KB Output is correct
27 Correct 25 ms 26400 KB Output is correct
28 Correct 24 ms 26204 KB Output is correct
29 Correct 27 ms 26460 KB Output is correct
30 Correct 27 ms 26468 KB Output is correct
31 Correct 30 ms 26460 KB Output is correct
32 Correct 28 ms 26204 KB Output is correct
33 Correct 26 ms 26200 KB Output is correct
34 Correct 28 ms 26460 KB Output is correct
35 Correct 28 ms 26460 KB Output is correct
36 Correct 26 ms 26448 KB Output is correct
37 Incorrect 26 ms 26412 KB Output isn't correct
38 Halted 0 ms 0 KB -

Subtask #6
0 / 11.0

# 결과 실행 시간 메모리 Grader output
1 Correct 5 ms 26204 KB Output is correct
2 Correct 6 ms 26136 KB Output is correct
3 Correct 8 ms 26132 KB Output is correct
4 Correct 5 ms 26204 KB Output is correct
5 Correct 995 ms 26424 KB Output is correct
6 Correct 24 ms 26200 KB Output is correct
7 Correct 24 ms 26200 KB Output is correct
8 Correct 24 ms 26204 KB Output is correct
9 Correct 26 ms 26204 KB Output is correct
10 Correct 24 ms 26204 KB Output is correct
11 Correct 25 ms 26200 KB Output is correct
12 Correct 27 ms 26452 KB Output is correct
13 Incorrect 1027 ms 26840 KB Output isn't correct
14 Halted 0 ms 0 KB -

Subtask #7
0 / 23.0

# 결과 실행 시간 메모리 Grader output
1 Correct 5 ms 26200 KB Output is correct
2 Correct 7 ms 26204 KB Output is correct
3 Correct 5 ms 26204 KB Output is correct
4 Correct 486 ms 26632 KB Output is correct
5 Correct 1024 ms 26964 KB Output is correct
6 Correct 25 ms 26204 KB Output is correct
7 Correct 25 ms 26204 KB Output is correct
8 Correct 28 ms 26460 KB Output is correct
9 Correct 81 ms 29724 KB Output is correct
10 Runtime error 91 ms 113136 KB Execution killed with signal 11
11 Halted 0 ms 0 KB -