oj.uz

답안 #877784

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
877784 2023-11-23T14:29:52 Z simona1230 Jail (JOI22_jail) C++17
61 / 100
 5000 ms 168868 KB 
#include <bits/stdc++.h>
#define endl "\n"
using namespace std;
const int maxver=1e6;
const int maxn=9*120000;
int q,n,m;
vector<int> f[maxn];
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);
    }
    cin>>m;
}

int num;
int ts[maxn];
int te[maxn];
int dw[maxn];
int up[maxn];

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

void add_edge(int x,int y)
{
    v[x].push_back(y);
    o[y].push_back(x);
}

void make_tree(int i,int l,int r)
{
    if(l==r)
    {
        ts[i]=num++;
        te[i]=num++;
        //cout<<ts[i]<<" "<<te[i]<<" "<<l<<" "<<r<<endl;
        dw[l]=ts[i];
        up[l]=te[i];
        return;
    }

    ts[i]=num++;
    te[i]=num++;
    //cout<<ts[i]<<" "<<te[i]<<" "<<l<<" "<<r<<endl;
    int mid=(l+r)/2;

    make_tree(i*2,l,mid);
    make_tree(i*2+1,mid+1,r);

    add_edge(ts[i],ts[i*2]);
    add_edge(ts[i],ts[i*2+1]);
    add_edge(te[i*2],te[i]);
    add_edge(te[i*2+1],te[i]);
}

int used[maxn];
int sz[maxn];

void size_(int i)
{
    used[i]=1;
    sz[i]=1;
    for(int j=0; j<f[i].size(); j++)
    {
        int nb=f[i][j];
        if(!used[nb])
        {
            size_(nb);
            sz[i]+=sz[nb];
        }
    }
}

int jump[maxn][21];

int pos[maxn];
int chain[maxn];
int lvl[maxn];
int cnt=1;

void hld(int i,int lead,int level,int par)
{
    pos[i]=cnt++;
    chain[i]=lead;
    lvl[i]=level;

    int maxx=0,big=0;
    for(int j=0; j<f[i].size(); j++)
    {
        int nb=f[i][j];
        if(sz[nb]>maxx&&nb!=par)
        {
            maxx=sz[nb];
            big=nb;
        }
    }

    if(big)
    {
        //cout<<"here "<<i<<" "<<lead<<" "<<ver<<endl;
        hld(big,lead,level+1,i);
        jump[big][0]=i;
    }

    for(int j=0; j<f[i].size(); j++)
    {
        int nb=f[i][j];
        if(nb!=big&&nb!=par)
        {
            hld(nb,nb,level+1,i);
            jump[nb][0]=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];
}

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);
    x=make_jump(x,abs(lvl[x]-lvl[y]));
    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||r<ql||l>qr)return;

    if(ql<=l&&r<=qr)
    {
        add_edge(pr,ts[i]);
        add_edge(te[i],pr);
        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<=m; i++)
    {
        int x,y;
        cin>>x>>y;
        add_edge(dw[pos[x]],i);
        add_edge(i,up[pos[y]]);

        int st,lca_=lca(x,y);
        //cout<<lca_<<endl;

        st=x;
        while(true)
        {
            int ed=chain[st];
            if(lvl[ed]<lvl[lca_])ed=lca_;
            update(1,1,n,pos[ed],pos[st],i);
            //cout<<pos[ed]<<" "<<pos[st]<<endl;
            if(ed==lca_)break;
            st=jump[ed][0];
        }

        st=y;
        while(true)
        {
            int ed=chain[st];
            if(lvl[ed]<lvl[lca_])ed=lca_;
            update(1,1,n,pos[ed],pos[st],i);
            //cout<<pos[ed]<<" "<<pos[st]<<endl;
            if(ed==lca_)break;
            st=jump[ed][0];
        }
    }
}

int comp;
stack<int> topo;
int used1[maxn];
int used2[maxn];

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);
    }
    topo.push(i);
}

void dfs2(int i)
{
    used2[i]=comp;
    for(int j=0; j<o[i].size(); j++)
    {
        int nb=o[i][j];
        if(!used2[nb])
            dfs2(nb);
    }
}
map<int,int> mp;
void check()
{
    mp.clear();
    for(int i=1; i<=m; i++)
        if(!used1[i])dfs1(i);

    comp=0;
    while(topo.size())
    {
        int ver=topo.top();
        topo.pop();
        if(!used2[ver])
        {
            comp++;
            dfs2(ver);
        }
    }
    //cout<<comp<<" "<<num<<endl;
    bool ans=1;
    for(int i=1;i<=m;i++)
    {
        mp[used2[i]]++;
        if(mp[used2[i]]>1)ans=0;
    }
    if(ans)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--)
    {
        read();

        for(int i=1; i<maxver; i++)
        {
            v[i].clear();
            o[i].clear();
        }
        for(int i=1;i<maxn;i++)
        {
            used[i]=pos[i]=used1[i]=0;
            used2[i]=chain[i]=ts[i]=0;
            te[i]=sz[i]=dw[i]=up[i]=lvl[i]=0;
        }
        /*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));*/
        for(int i=1; i<=n; i++)
            for(int j=0; j<=20; j++)
                jump[i][j]=0;

        size_(1);
        cnt=1;
        hld(1,1,1,-1);
        prec();
        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;
}
/*
1
6
2 4
4 1
1 5
5 3
3 6
2
2 3
6 1
*/

Compilation message

jail.cpp: In function 'void size_(int)':
jail.cpp:70:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   70 |     for(int j=0; j<f[i].size(); j++)
      |                  ~^~~~~~~~~~~~
jail.cpp: In function 'void hld(int, 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:112:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  112 |     for(int j=0; j<f[i].size(); j++)
      |                  ~^~~~~~~~~~~~
jail.cpp: In function 'void dfs1(int)':
jail.cpp:214:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  214 |     for(int j=0; j<v[i].size(); j++)
      |                  ~^~~~~~~~~~~~
jail.cpp: In function 'void dfs2(int)':
jail.cpp:226:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  226 |     for(int j=0; j<o[i].size(); j++)
      |                  ~^~~~~~~~~~~~

Subtask #1
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 33 ms 121684 KB Output is correct
2 Correct 40 ms 121688 KB Output is correct
3 Correct 26 ms 121764 KB Output is correct
4 Correct 2747 ms 121888 KB Output is correct
5 Execution timed out 5044 ms 121880 KB Time limit exceeded
6 Halted 0 ms 0 KB -

Subtask #2
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 28 ms 121692 KB Output is correct
2 Correct 25 ms 121688 KB Output is correct
3 Correct 141 ms 121692 KB Output is correct
4 Correct 140 ms 121692 KB Output is correct
5 Correct 135 ms 121900 KB Output is correct
6 Correct 139 ms 121896 KB Output is correct
7 Correct 140 ms 121900 KB Output is correct
8 Correct 141 ms 121884 KB Output is correct
9 Correct 138 ms 122108 KB Output is correct
10 Correct 136 ms 121912 KB Output is correct
11 Correct 120 ms 121900 KB Output is correct
12 Correct 135 ms 121900 KB Output is correct
13 Correct 135 ms 121868 KB Output is correct

Subtask #3
16.0 / 16.0

# 결과 실행 시간 메모리 Grader output
1 Correct 28 ms 121692 KB Output is correct
2 Correct 25 ms 121688 KB Output is correct
3 Correct 141 ms 121692 KB Output is correct
4 Correct 140 ms 121692 KB Output is correct
5 Correct 135 ms 121900 KB Output is correct
6 Correct 139 ms 121896 KB Output is correct
7 Correct 140 ms 121900 KB Output is correct
8 Correct 141 ms 121884 KB Output is correct
9 Correct 138 ms 122108 KB Output is correct
10 Correct 136 ms 121912 KB Output is correct
11 Correct 120 ms 121900 KB Output is correct
12 Correct 135 ms 121900 KB Output is correct
13 Correct 135 ms 121868 KB Output is correct
14 Correct 32 ms 121692 KB Output is correct
15 Correct 42 ms 121692 KB Output is correct
16 Correct 144 ms 121916 KB Output is correct
17 Correct 139 ms 121920 KB Output is correct
18 Correct 140 ms 121916 KB Output is correct
19 Correct 141 ms 121844 KB Output is correct
20 Correct 139 ms 121912 KB Output is correct
21 Correct 145 ms 121908 KB Output is correct
22 Correct 137 ms 121944 KB Output is correct
23 Correct 140 ms 121852 KB Output is correct
24 Correct 135 ms 121852 KB Output is correct
25 Correct 137 ms 121688 KB Output is correct
26 Correct 138 ms 121848 KB Output is correct
27 Correct 133 ms 121900 KB Output is correct
28 Correct 137 ms 121684 KB Output is correct

Subtask #4
28.0 / 28.0

# 결과 실행 시간 메모리 Grader output
1 Correct 28 ms 121692 KB Output is correct
2 Correct 25 ms 121688 KB Output is correct
3 Correct 141 ms 121692 KB Output is correct
4 Correct 140 ms 121692 KB Output is correct
5 Correct 135 ms 121900 KB Output is correct
6 Correct 139 ms 121896 KB Output is correct
7 Correct 140 ms 121900 KB Output is correct
8 Correct 141 ms 121884 KB Output is correct
9 Correct 138 ms 122108 KB Output is correct
10 Correct 136 ms 121912 KB Output is correct
11 Correct 120 ms 121900 KB Output is correct
12 Correct 135 ms 121900 KB Output is correct
13 Correct 135 ms 121868 KB Output is correct
14 Correct 32 ms 121692 KB Output is correct
15 Correct 42 ms 121692 KB Output is correct
16 Correct 144 ms 121916 KB Output is correct
17 Correct 139 ms 121920 KB Output is correct
18 Correct 140 ms 121916 KB Output is correct
19 Correct 141 ms 121844 KB Output is correct
20 Correct 139 ms 121912 KB Output is correct
21 Correct 145 ms 121908 KB Output is correct
22 Correct 137 ms 121944 KB Output is correct
23 Correct 140 ms 121852 KB Output is correct
24 Correct 135 ms 121852 KB Output is correct
25 Correct 137 ms 121688 KB Output is correct
26 Correct 138 ms 121848 KB Output is correct
27 Correct 133 ms 121900 KB Output is correct
28 Correct 137 ms 121684 KB Output is correct
29 Correct 144 ms 121948 KB Output is correct
30 Correct 139 ms 122236 KB Output is correct
31 Correct 139 ms 121944 KB Output is correct
32 Correct 145 ms 121928 KB Output is correct
33 Correct 138 ms 121692 KB Output is correct
34 Correct 141 ms 121952 KB Output is correct
35 Correct 141 ms 121936 KB Output is correct
36 Correct 144 ms 121960 KB Output is correct
37 Correct 152 ms 121864 KB Output is correct

Subtask #5
12.0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 28 ms 121692 KB Output is correct
2 Correct 25 ms 121688 KB Output is correct
3 Correct 141 ms 121692 KB Output is correct
4 Correct 140 ms 121692 KB Output is correct
5 Correct 135 ms 121900 KB Output is correct
6 Correct 139 ms 121896 KB Output is correct
7 Correct 140 ms 121900 KB Output is correct
8 Correct 141 ms 121884 KB Output is correct
9 Correct 138 ms 122108 KB Output is correct
10 Correct 136 ms 121912 KB Output is correct
11 Correct 120 ms 121900 KB Output is correct
12 Correct 135 ms 121900 KB Output is correct
13 Correct 135 ms 121868 KB Output is correct
14 Correct 32 ms 121692 KB Output is correct
15 Correct 42 ms 121692 KB Output is correct
16 Correct 144 ms 121916 KB Output is correct
17 Correct 139 ms 121920 KB Output is correct
18 Correct 140 ms 121916 KB Output is correct
19 Correct 141 ms 121844 KB Output is correct
20 Correct 139 ms 121912 KB Output is correct
21 Correct 145 ms 121908 KB Output is correct
22 Correct 137 ms 121944 KB Output is correct
23 Correct 140 ms 121852 KB Output is correct
24 Correct 135 ms 121852 KB Output is correct
25 Correct 137 ms 121688 KB Output is correct
26 Correct 138 ms 121848 KB Output is correct
27 Correct 133 ms 121900 KB Output is correct
28 Correct 137 ms 121684 KB Output is correct
29 Correct 144 ms 121948 KB Output is correct
30 Correct 139 ms 122236 KB Output is correct
31 Correct 139 ms 121944 KB Output is correct
32 Correct 145 ms 121928 KB Output is correct
33 Correct 138 ms 121692 KB Output is correct
34 Correct 141 ms 121952 KB Output is correct
35 Correct 141 ms 121936 KB Output is correct
36 Correct 144 ms 121960 KB Output is correct
37 Correct 152 ms 121864 KB Output is correct
38 Correct 193 ms 123988 KB Output is correct
39 Correct 131 ms 168868 KB Output is correct
40 Correct 213 ms 123988 KB Output is correct
41 Correct 211 ms 123984 KB Output is correct
42 Correct 197 ms 124204 KB Output is correct
43 Correct 171 ms 123412 KB Output is correct
44 Correct 178 ms 122548 KB Output is correct
45 Correct 145 ms 158720 KB Output is correct
46 Correct 146 ms 158800 KB Output is correct
47 Correct 125 ms 163748 KB Output is correct
48 Correct 152 ms 163648 KB Output is correct
49 Correct 127 ms 159056 KB Output is correct
50 Correct 161 ms 158808 KB Output is correct
51 Correct 121 ms 160140 KB Output is correct
52 Correct 119 ms 160296 KB Output is correct
53 Correct 168 ms 123896 KB Output is correct
54 Correct 148 ms 158688 KB Output is correct

Subtask #6
0 / 11.0

# 결과 실행 시간 메모리 Grader output
1 Correct 25 ms 121688 KB Output is correct
2 Correct 36 ms 121868 KB Output is correct
3 Correct 41 ms 121796 KB Output is correct
4 Correct 26 ms 121692 KB Output is correct
5 Execution timed out 5027 ms 121860 KB Time limit exceeded
6 Halted 0 ms 0 KB -

Subtask #7
0 / 23.0

# 결과 실행 시간 메모리 Grader output
1 Correct 33 ms 121684 KB Output is correct
2 Correct 40 ms 121688 KB Output is correct
3 Correct 26 ms 121764 KB Output is correct
4 Correct 2747 ms 121888 KB Output is correct
5 Execution timed out 5044 ms 121880 KB Time limit exceeded
6 Halted 0 ms 0 KB -