oj.uz

Submission #876463

# Submission time Handle Problem Language Result Execution time Memory
876463 2023-11-21T19:17:42 Z Ice_man Jail (JOI22_jail) C++14
49 / 100
 5000 ms 25000 KB 
#include <iostream>
#include <vector>
#include <cstring>
#include <stack>
#include <algorithm>

#define maxn 120005
#define maxlog 20
#define pb(x) push_back(x)
 
#pragma GCC optimize("O3" , "Ofast" , "unroll-loops")
#pragma GCC target(avx2)
 
using namespace std;
 
int n, m,  q;
vector <int> v[maxn];
int start[maxn], _final[maxn];
vector <int> new_tree[maxn];
int bin_lift[maxn][maxlog];
int pom1[maxn];
int pom2[maxn];

bool cmp(int a , int b)
{
    return start[a] < start[b];
}

bool cmp1(int a , int b)
{
    return _final[a] < _final[b];
}

int pomm1[maxn] , pomm2[maxn];

void read()
{
    cin >> n;
 
    for(int i = 1; i <= n; i++)
    {
        for(int j = 0; j < maxlog; j++) bin_lift[i][j] = 0;
    }
 
    for(int i = 1; i <= n; i++)
    {
        v[i].clear();
        new_tree[i].clear();
    }
 
    int from, to;
    for(int i = 1; i <= (n - 1); i++)
    {
        cin >> from >> to;
 
        v[from].pb(to);
        v[to].pb(from);
    }
 
    cin >> m;
 
    for(int i = 1; i <= m; i++)
    {
        pom1[i] = 0;
        pom2[i] = 0;
    }
    
    for(int i = 1; i <= m; i++) cin >> start[i] >> _final[i];
    
    if(n > 500)
    {
        for(int i = 1; i <= m; i++) pomm1[i] = pomm2[i] = i;
        sort(pomm1 + 1 , pomm1 + 1 + m , cmp);
        sort(pomm2 + 1 , pomm2 + 1 + m , cmp1);
        
        for(int i = 1; i <= m; i++)
        {
            if(pomm1[i] != pomm2[i])
            {
                cout << "No" << endl;
                return;
            }
        }
        
        cout << "Yes" << endl;
        return;
        
    }
    
    
}  
 
///int bin_lift[maxn][maxlog];
int depth[maxn];
 
void calc_bin(int node, int parent)
{
    for(int nb : v[node])
    {
        if(nb != parent)
        {
            bin_lift[nb][0] = node;
            for(int i = 1; i < maxlog; i++) bin_lift[nb][i] = bin_lift[bin_lift[nb][i - 1]][i - 1];
 
            depth[nb] = depth[node] + 1;
            calc_bin(nb, node);
        }
    }
 
}
 
 
int get_lca(int a, int b)
{
    if(depth[a] < depth[b]) swap(a, b);
 
    ///cout << a << "-" << b << endl;
 
    int levels = depth[a] - depth[b];
    ///cout << "** " << levels << endl;;
    for(int i = maxlog - 1; i >= 0; i--)
    {
        if(levels >> i & 1)
        {
            ///cout  << ">< "<< (1 << i) << endl;
            a = bin_lift[a][i];
            ///levels -= (1 << i);
            ///cout << (1 << i) << endl;
        }
    }
 
    ///cout << a << "-" << b << endl;
    if(a == b) return a;
 
    for(int i = maxlog - 1; i >= 0; i--)
    {
        if(!bin_lift[a][i]) continue;
        if(!bin_lift[b][i]) continue;
 
        if(bin_lift[a][i] != bin_lift[b][i])
        {
            a = bin_lift[a][i];
            b = bin_lift[b][i];
        }
 
    }
 
    return bin_lift[a][0];
 
}
 
bool check(int a, int b, int c)
{
    int lca = get_lca(a, b);
    ///int pom = get_lca(lca , c);
 
    if(get_lca(lca, c) == lca && get_lca(c, a) == c) return true;
    if(get_lca(lca, c) == lca && get_lca(c, b) == c) return true;
 
    return false;
 
}
 
//vector <int> new_tree[maxn];
 
void solve()
{
 
    calc_bin(1, 0);
 
    for(int a = 1; a <= m; a++)
    {
        for(int b = 1; b <= m; b++)
        {
            if(a == b) continue;
            ///int lca1 = get_lca(start[a], _final[a]);
 
            if(check(start[a], _final[a], start[b]) == true) new_tree[b].pb(a);
            if(check(start[a], _final[a], _final[b]) == true) new_tree[a].pb(b);
 
            ///cout << check(start[a] , _final[a] , start[b]) << " " <<  check(start[a] , _final[a] , _final[b]) << endl;
 
        }
    }
 
    /**for(int i = 1; i <= n; i++)
    {
       cout << i << ": ";
       for(int nb : new_tree[i]) cout << nb << " ";
       cout << endl;
    }*/
 
}
 
stack <int> s;
///int pom1[maxn] , pom2[maxn];
int _time = 0;
int br = 0;
 
void count_ssc(int node, int parent)
{
    s.push(node);
    _time++;
 
    pom1[node] = _time;
    pom2[node] = _time;
 
    for(int nb : new_tree[node])
    {
        if(pom2[nb] == -1) continue;
        if(pom2[nb])
        {
            pom1[node] = min(pom1[node], pom1[nb]);
        }
        else
        {
            count_ssc(nb, node);
            pom1[node] = min(pom1[node], pom1[nb]);
        }
    }
 
    if(pom1[node] == pom2[node])
    {
        br++;
        while(!s.empty() && s.top() != node)
        {
            pom2[s.top()] = -1;
            s.pop();
        }
        pom2[node] = -1;
        s.pop();
    }
 
 
}
 
void combine()
{
    cin >> q;
    while(q--)
    {
        br = 0;
        _time = 0;
 
        read();
        solve();
 
        /**for(int i = 1; i <= n; i++)
        {
            cout << i << ": ";
            for(int power = 0; power < maxlog; power++)
            {
                cout << bin_lift[i][power] << " ";
            }
            cout << endl;
        }*/
 
        ///cout << "-> " << get_lca(1 , 5) << endl;
        while(s.size()) s.pop();
        for(int i = 1; i <= m; i++) if(!pom2[i]) count_ssc(i, -1);
 
        if(br == m) cout << "Yes" << endl;
        else cout << "No" << endl;
 
    }
}
 
int main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
 
    combine();
 
    return 0;
 
}
/**
 
3
3
1 2
2 3
2
2 1
3 2
7
1 2
2 3
3 4
4 5
5 6
6 7
3
1 3
4 2
2 5
8
1 2
2 3
3 4
4 5
5 6
6 7
7 8
4
1 5
2 6
3 7
4 8
 
 
*/

Compilation message

jail.cpp:12:20: warning: '#pragma GCC option' is not a string [-Wpragmas]
   12 | #pragma GCC target(avx2)
      |                    ^~~~

Subtask #1
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 12376 KB Output is correct
2 Correct 2 ms 12380 KB Output is correct
3 Correct 2 ms 12376 KB Output is correct
4 Correct 12 ms 12728 KB Output is correct
5 Correct 21 ms 13148 KB Output is correct
6 Correct 3 ms 12380 KB Output is correct
7 Correct 4 ms 12380 KB Output is correct
8 Correct 34 ms 12376 KB Output is correct
9 Incorrect 1097 ms 15924 KB Output isn't correct
10 Halted 0 ms 0 KB -

Subtask #2
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 12380 KB Output is correct
2 Correct 2 ms 12448 KB Output is correct
3 Correct 3 ms 12376 KB Output is correct
4 Correct 4 ms 12380 KB Output is correct
5 Correct 3 ms 12380 KB Output is correct
6 Correct 3 ms 12380 KB Output is correct
7 Correct 3 ms 12380 KB Output is correct
8 Correct 4 ms 12380 KB Output is correct
9 Correct 4 ms 12380 KB Output is correct
10 Correct 3 ms 12380 KB Output is correct
11 Correct 3 ms 12380 KB Output is correct
12 Correct 3 ms 12248 KB Output is correct
13 Correct 3 ms 12380 KB Output is correct

Subtask #3
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 12380 KB Output is correct
2 Correct 2 ms 12448 KB Output is correct
3 Correct 3 ms 12376 KB Output is correct
4 Correct 4 ms 12380 KB Output is correct
5 Correct 3 ms 12380 KB Output is correct
6 Correct 3 ms 12380 KB Output is correct
7 Correct 3 ms 12380 KB Output is correct
8 Correct 4 ms 12380 KB Output is correct
9 Correct 4 ms 12380 KB Output is correct
10 Correct 3 ms 12380 KB Output is correct
11 Correct 3 ms 12380 KB Output is correct
12 Correct 3 ms 12248 KB Output is correct
13 Correct 3 ms 12380 KB Output is correct
14 Correct 2 ms 12380 KB Output is correct
15 Correct 3 ms 12380 KB Output is correct
16 Correct 3 ms 12380 KB Output is correct
17 Correct 3 ms 12380 KB Output is correct
18 Correct 3 ms 12464 KB Output is correct
19 Correct 3 ms 12380 KB Output is correct
20 Correct 4 ms 12380 KB Output is correct
21 Correct 4 ms 12380 KB Output is correct
22 Correct 3 ms 12380 KB Output is correct
23 Correct 3 ms 12380 KB Output is correct
24 Correct 3 ms 12380 KB Output is correct
25 Correct 4 ms 12380 KB Output is correct
26 Correct 3 ms 12380 KB Output is correct
27 Correct 4 ms 12380 KB Output is correct
28 Correct 3 ms 12380 KB Output is correct

Subtask #4
28.0 / 28.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 12380 KB Output is correct
2 Correct 2 ms 12448 KB Output is correct
3 Correct 3 ms 12376 KB Output is correct
4 Correct 4 ms 12380 KB Output is correct
5 Correct 3 ms 12380 KB Output is correct
6 Correct 3 ms 12380 KB Output is correct
7 Correct 3 ms 12380 KB Output is correct
8 Correct 4 ms 12380 KB Output is correct
9 Correct 4 ms 12380 KB Output is correct
10 Correct 3 ms 12380 KB Output is correct
11 Correct 3 ms 12380 KB Output is correct
12 Correct 3 ms 12248 KB Output is correct
13 Correct 3 ms 12380 KB Output is correct
14 Correct 2 ms 12380 KB Output is correct
15 Correct 3 ms 12380 KB Output is correct
16 Correct 3 ms 12380 KB Output is correct
17 Correct 3 ms 12380 KB Output is correct
18 Correct 3 ms 12464 KB Output is correct
19 Correct 3 ms 12380 KB Output is correct
20 Correct 4 ms 12380 KB Output is correct
21 Correct 4 ms 12380 KB Output is correct
22 Correct 3 ms 12380 KB Output is correct
23 Correct 3 ms 12380 KB Output is correct
24 Correct 3 ms 12380 KB Output is correct
25 Correct 4 ms 12380 KB Output is correct
26 Correct 3 ms 12380 KB Output is correct
27 Correct 4 ms 12380 KB Output is correct
28 Correct 3 ms 12380 KB Output is correct
29 Correct 32 ms 12588 KB Output is correct
30 Correct 21 ms 12380 KB Output is correct
31 Correct 24 ms 12540 KB Output is correct
32 Correct 20 ms 12380 KB Output is correct
33 Correct 5 ms 12636 KB Output is correct
34 Correct 41 ms 12380 KB Output is correct
35 Correct 57 ms 12628 KB Output is correct
36 Correct 29 ms 12380 KB Output is correct
37 Correct 22 ms 12376 KB Output is correct

Subtask #5
0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 12380 KB Output is correct
2 Correct 2 ms 12448 KB Output is correct
3 Correct 3 ms 12376 KB Output is correct
4 Correct 4 ms 12380 KB Output is correct
5 Correct 3 ms 12380 KB Output is correct
6 Correct 3 ms 12380 KB Output is correct
7 Correct 3 ms 12380 KB Output is correct
8 Correct 4 ms 12380 KB Output is correct
9 Correct 4 ms 12380 KB Output is correct
10 Correct 3 ms 12380 KB Output is correct
11 Correct 3 ms 12380 KB Output is correct
12 Correct 3 ms 12248 KB Output is correct
13 Correct 3 ms 12380 KB Output is correct
14 Correct 2 ms 12380 KB Output is correct
15 Correct 3 ms 12380 KB Output is correct
16 Correct 3 ms 12380 KB Output is correct
17 Correct 3 ms 12380 KB Output is correct
18 Correct 3 ms 12464 KB Output is correct
19 Correct 3 ms 12380 KB Output is correct
20 Correct 4 ms 12380 KB Output is correct
21 Correct 4 ms 12380 KB Output is correct
22 Correct 3 ms 12380 KB Output is correct
23 Correct 3 ms 12380 KB Output is correct
24 Correct 3 ms 12380 KB Output is correct
25 Correct 4 ms 12380 KB Output is correct
26 Correct 3 ms 12380 KB Output is correct
27 Correct 4 ms 12380 KB Output is correct
28 Correct 3 ms 12380 KB Output is correct
29 Correct 32 ms 12588 KB Output is correct
30 Correct 21 ms 12380 KB Output is correct
31 Correct 24 ms 12540 KB Output is correct
32 Correct 20 ms 12380 KB Output is correct
33 Correct 5 ms 12636 KB Output is correct
34 Correct 41 ms 12380 KB Output is correct
35 Correct 57 ms 12628 KB Output is correct
36 Correct 29 ms 12380 KB Output is correct
37 Correct 22 ms 12376 KB Output is correct
38 Incorrect 1122 ms 15856 KB Output isn't correct
39 Halted 0 ms 0 KB -

Subtask #6
0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 12376 KB Output is correct
2 Correct 3 ms 12376 KB Output is correct
3 Correct 3 ms 12380 KB Output is correct
4 Correct 2 ms 12380 KB Output is correct
5 Correct 18 ms 12608 KB Output is correct
6 Correct 3 ms 12380 KB Output is correct
7 Correct 3 ms 12380 KB Output is correct
8 Correct 2 ms 12416 KB Output is correct
9 Correct 3 ms 12380 KB Output is correct
10 Correct 3 ms 12380 KB Output is correct
11 Correct 3 ms 12380 KB Output is correct
12 Correct 29 ms 12380 KB Output is correct
13 Correct 408 ms 13268 KB Output is correct
14 Correct 189 ms 13136 KB Output is correct
15 Correct 330 ms 13396 KB Output is correct
16 Execution timed out 5042 ms 25000 KB Time limit exceeded
17 Halted 0 ms 0 KB -

Subtask #7
0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 12376 KB Output is correct
2 Correct 2 ms 12380 KB Output is correct
3 Correct 2 ms 12376 KB Output is correct
4 Correct 12 ms 12728 KB Output is correct
5 Correct 21 ms 13148 KB Output is correct
6 Correct 3 ms 12380 KB Output is correct
7 Correct 4 ms 12380 KB Output is correct
8 Correct 34 ms 12376 KB Output is correct
9 Incorrect 1097 ms 15924 KB Output isn't correct
10 Halted 0 ms 0 KB -