oj.uz

답안 #631776

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
631776 2022-08-18T17:29:02 Z mdn2002 Jail (JOI22_jail) C++14
21 / 100
 77 ms 19356 KB 
#include<bits/stdc++.h>
using namespace std;
int n , m , st [200005][21] , dp [200005] , s [200005] , t [200005] , aaa [200005] , vis [200005] , ff;
vector < int > gr [200005] , grr [200005] , ss [200005] , tt [200005];
void dfs ( int x , int p )
{
    dp [x] = dp [p] + 1;
    st [x][0] = p;
    for ( auto u : gr [x] )
    {
        if ( u == p ) continue;
        dfs ( u , x );
    }
}
void go ( int x , int p )
{
    aaa [x] = aaa [p];
    if ( ss [x] . size () || tt [x] . size () ) aaa [x] = x;
    for ( auto u : gr [x] )
    {
        if ( u == p ) continue;
        go ( u , x );
    }
}
void dfss ( int x )
{
    vis [x] = 1;
    for ( auto u : grr [x] )
    {
        if ( vis [u] == 1 )
        {
            ff = 1;
            continue;
        }
        else if ( vis [u] == 2 ) continue;
        else dfss ( u );
    }
    vis [x] = 2;
}
int lca ( int x , int y )
{
    if ( dp [x] > dp [y] ) swap ( x , y );
    int dif = dp [y] - dp [x];
    for ( int i = 0 ; i <= 20 ; i ++ )
    {
        if ( ( dif & ( 1 << i ) ) ) y = st [y][i];
    }
    if ( x == y ) return x;
    for ( int i = 20 ; i >= 0 ; i -- )
    {
        if ( st [x][i] != st [y][i] )
        {
            x = st [x][i];
            y = st [y][i];
        }
    }
    return st [x][0];
}
int inbet ( int x , int y , int z )
{
    if ( dp [z] > dp [x] && dp [z] > dp [y] ) return 0;
    int aa = lca ( x , y );
    if ( dp [aa] > dp [z] ) return 0;
    int a = lca ( x , z );
    int b = lca ( y , z );
    if ( a == z || b == z ) return 1;
    return 0;
}
int main()
{
    int q;
    cin >> q;
    while ( q -- )
    {
        ff = 0;
        cin >> n;
        for ( int i = 1 ; i <= n ; i ++ )
        {
            gr [i] . clear ();
            grr [i] . clear ();
            ss [i] . clear ();
            tt [i] . clear ();
            dp [i] = 0;
            vis [i] = 0;
            aaa [i] = 0;
            for ( int j = 0 ; j <= 20 ; j ++ ) st [i][j] = 0;
        }
        for ( int i = 0 ; i < n - 1 ; i ++ )
        {
            int x , y;
            cin >> x >> y;
            gr [x] . push_back ( y );
            gr [y] . push_back ( x );
        }
        dfs ( 1 , 0 );
        for ( int i = 1 ; i <= 20 ; i ++ )
        {
            for ( int j = 1 ; j <= n ; j ++ ) st [j][i] = st [ st [j][ i - 1 ] ][ i - 1 ];
        }
        cin >> m;
        long long sum = 0;
        for ( int i = 1 ; i <= m ; i ++ )
        {
            cin >> s [i] >> t [i];
            ss [ s [i] ] . push_back ( i );
            tt [ t [i] ] . push_back ( i );
            int a = lca ( s [i] , t [i] );
        }
        go ( 1 , 0 );
        int num = 0;
        for ( int i = 1 ; i <= m ; i ++ )
        {
            int x = s [i] , y = t [i] , z = lca ( x , y );
            while ( true )
            {
                if ( dp [x] < dp [z] ) break;
                if ( ss [x] . size () )
                {
                    if ( ss [x][0] != i )
                    {
                        grr [i] . push_back ( ss [x][0] );
                        num ++;
                    }
                }
                if ( tt [x] . size () )
                {
                    if ( tt [x][0] != i )
                    {
                        grr [ tt [x][0] ] . push_back ( i );
                        num ++;
                    }
                }
                if ( num > 10 * m ) break;
                if ( x == z ) break;
                x = aaa [ st [x][0] ];
            }
            x = t [i];
            while ( true )
            {
                if ( dp [x] < dp [z] ) break;
                if ( ss [x] . size () )
                {
                    if ( ss [x][0] != i )
                    {
                        grr [i] . push_back ( ss [x][0] );
                        num ++;
                    }
                }
                if ( tt [x] . size () )
                {
                    if ( tt [x][0] != i )
                    {
                        grr [ tt [x][0] ] . push_back ( i );
                        num ++;
                    }
                }
                if ( num > 10 * m ) break;
                if ( x == z ) break;
                x = aaa [ st [x][0] ];
            }
        }
        if ( num > 10 * m ) 
        {
            cout << "No" << endl;
            continue;
        }
        for ( int i = 1 ; i <= m ; i ++ )
        {
            if ( vis [i] == 0 ) dfss ( i );
        }
        if ( ff ) cout << "No" << endl;
        else cout << "Yes" << endl;
    }
}

/*
1
4
1 2
2 3
3 4
2
1 3
4 2
*/

Compilation message

jail.cpp: In function 'int main()':
jail.cpp:107:17: warning: unused variable 'a' [-Wunused-variable]
  107 |             int a = lca ( s [i] , t [i] );
      |                 ^
jail.cpp:101:19: warning: unused variable 'sum' [-Wunused-variable]
  101 |         long long sum = 0;
      |                   ^~~

Subtask #1
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 11 ms 19072 KB Output is correct
2 Correct 10 ms 19120 KB Output is correct
3 Correct 10 ms 19112 KB Output is correct
4 Correct 32 ms 19268 KB Output is correct
5 Correct 62 ms 19356 KB Output is correct
6 Correct 15 ms 19156 KB Output is correct
7 Correct 13 ms 19156 KB Output is correct
8 Incorrect 13 ms 19156 KB Output isn't correct
9 Halted 0 ms 0 KB -

Subtask #2
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 10 ms 19028 KB Output is correct
2 Correct 10 ms 19004 KB Output is correct
3 Correct 12 ms 19128 KB Output is correct
4 Correct 12 ms 19156 KB Output is correct
5 Correct 12 ms 19156 KB Output is correct
6 Correct 12 ms 19156 KB Output is correct
7 Correct 13 ms 19108 KB Output is correct
8 Correct 12 ms 19028 KB Output is correct
9 Correct 12 ms 19028 KB Output is correct
10 Correct 12 ms 19136 KB Output is correct
11 Correct 11 ms 19156 KB Output is correct
12 Correct 11 ms 19156 KB Output is correct
13 Correct 11 ms 19080 KB Output is correct

Subtask #3
16.0 / 16.0

# 결과 실행 시간 메모리 Grader output
1 Correct 10 ms 19028 KB Output is correct
2 Correct 10 ms 19004 KB Output is correct
3 Correct 12 ms 19128 KB Output is correct
4 Correct 12 ms 19156 KB Output is correct
5 Correct 12 ms 19156 KB Output is correct
6 Correct 12 ms 19156 KB Output is correct
7 Correct 13 ms 19108 KB Output is correct
8 Correct 12 ms 19028 KB Output is correct
9 Correct 12 ms 19028 KB Output is correct
10 Correct 12 ms 19136 KB Output is correct
11 Correct 11 ms 19156 KB Output is correct
12 Correct 11 ms 19156 KB Output is correct
13 Correct 11 ms 19080 KB Output is correct
14 Correct 10 ms 19028 KB Output is correct
15 Correct 11 ms 19028 KB Output is correct
16 Correct 13 ms 19080 KB Output is correct
17 Correct 12 ms 19156 KB Output is correct
18 Correct 13 ms 19048 KB Output is correct
19 Correct 11 ms 19028 KB Output is correct
20 Correct 12 ms 19156 KB Output is correct
21 Correct 12 ms 19100 KB Output is correct
22 Correct 11 ms 19156 KB Output is correct
23 Correct 9 ms 19028 KB Output is correct
24 Correct 11 ms 19052 KB Output is correct
25 Correct 12 ms 19044 KB Output is correct
26 Correct 12 ms 19080 KB Output is correct
27 Correct 11 ms 19156 KB Output is correct
28 Correct 11 ms 19084 KB Output is correct

Subtask #4
0 / 28.0

# 결과 실행 시간 메모리 Grader output
1 Correct 10 ms 19028 KB Output is correct
2 Correct 10 ms 19004 KB Output is correct
3 Correct 12 ms 19128 KB Output is correct
4 Correct 12 ms 19156 KB Output is correct
5 Correct 12 ms 19156 KB Output is correct
6 Correct 12 ms 19156 KB Output is correct
7 Correct 13 ms 19108 KB Output is correct
8 Correct 12 ms 19028 KB Output is correct
9 Correct 12 ms 19028 KB Output is correct
10 Correct 12 ms 19136 KB Output is correct
11 Correct 11 ms 19156 KB Output is correct
12 Correct 11 ms 19156 KB Output is correct
13 Correct 11 ms 19080 KB Output is correct
14 Correct 10 ms 19028 KB Output is correct
15 Correct 11 ms 19028 KB Output is correct
16 Correct 13 ms 19080 KB Output is correct
17 Correct 12 ms 19156 KB Output is correct
18 Correct 13 ms 19048 KB Output is correct
19 Correct 11 ms 19028 KB Output is correct
20 Correct 12 ms 19156 KB Output is correct
21 Correct 12 ms 19100 KB Output is correct
22 Correct 11 ms 19156 KB Output is correct
23 Correct 9 ms 19028 KB Output is correct
24 Correct 11 ms 19052 KB Output is correct
25 Correct 12 ms 19044 KB Output is correct
26 Correct 12 ms 19080 KB Output is correct
27 Correct 11 ms 19156 KB Output is correct
28 Correct 11 ms 19084 KB Output is correct
29 Incorrect 16 ms 19200 KB Output isn't correct
30 Halted 0 ms 0 KB -

Subtask #5
0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 10 ms 19028 KB Output is correct
2 Correct 10 ms 19004 KB Output is correct
3 Correct 12 ms 19128 KB Output is correct
4 Correct 12 ms 19156 KB Output is correct
5 Correct 12 ms 19156 KB Output is correct
6 Correct 12 ms 19156 KB Output is correct
7 Correct 13 ms 19108 KB Output is correct
8 Correct 12 ms 19028 KB Output is correct
9 Correct 12 ms 19028 KB Output is correct
10 Correct 12 ms 19136 KB Output is correct
11 Correct 11 ms 19156 KB Output is correct
12 Correct 11 ms 19156 KB Output is correct
13 Correct 11 ms 19080 KB Output is correct
14 Correct 10 ms 19028 KB Output is correct
15 Correct 11 ms 19028 KB Output is correct
16 Correct 13 ms 19080 KB Output is correct
17 Correct 12 ms 19156 KB Output is correct
18 Correct 13 ms 19048 KB Output is correct
19 Correct 11 ms 19028 KB Output is correct
20 Correct 12 ms 19156 KB Output is correct
21 Correct 12 ms 19100 KB Output is correct
22 Correct 11 ms 19156 KB Output is correct
23 Correct 9 ms 19028 KB Output is correct
24 Correct 11 ms 19052 KB Output is correct
25 Correct 12 ms 19044 KB Output is correct
26 Correct 12 ms 19080 KB Output is correct
27 Correct 11 ms 19156 KB Output is correct
28 Correct 11 ms 19084 KB Output is correct
29 Incorrect 16 ms 19200 KB Output isn't correct
30 Halted 0 ms 0 KB -

Subtask #6
0 / 11.0

# 결과 실행 시간 메모리 Grader output
1 Correct 10 ms 19028 KB Output is correct
2 Correct 10 ms 19120 KB Output is correct
3 Correct 10 ms 19104 KB Output is correct
4 Correct 11 ms 19028 KB Output is correct
5 Correct 22 ms 19156 KB Output is correct
6 Correct 11 ms 19112 KB Output is correct
7 Correct 11 ms 19028 KB Output is correct
8 Correct 11 ms 19088 KB Output is correct
9 Correct 11 ms 19048 KB Output is correct
10 Correct 11 ms 19028 KB Output is correct
11 Correct 11 ms 19028 KB Output is correct
12 Correct 16 ms 19188 KB Output is correct
13 Correct 52 ms 19200 KB Output is correct
14 Correct 77 ms 19144 KB Output is correct
15 Incorrect 61 ms 19160 KB Output isn't correct
16 Halted 0 ms 0 KB -

Subtask #7
0 / 23.0

# 결과 실행 시간 메모리 Grader output
1 Correct 11 ms 19072 KB Output is correct
2 Correct 10 ms 19120 KB Output is correct
3 Correct 10 ms 19112 KB Output is correct
4 Correct 32 ms 19268 KB Output is correct
5 Correct 62 ms 19356 KB Output is correct
6 Correct 15 ms 19156 KB Output is correct
7 Correct 13 ms 19156 KB Output is correct
8 Incorrect 13 ms 19156 KB Output isn't correct
9 Halted 0 ms 0 KB -