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Submission #629719

# Submission time Handle Problem Language Result Execution time Memory
629719 2022-08-15T00:05:47 Z chonka Cat in a tree (BOI17_catinatree) C++17
100 / 100
 64 ms 20296 KB 
#include<bits/stdc++.h>
using namespace std ;
typedef long long ll ;

const int MAXN = 2e5 + 7 ;

int n , k ;
vector < int > v[ MAXN ] ;

int dp[ MAXN ] , dist[ MAXN ] ;

vector < int > aux ;

void dfs ( int x ) {
    for ( auto y : v[ x ] ) {
        dfs ( y ) ;
    }
    aux.clear ( ) ;
    for ( auto y : v[ x ] ) {
        dp[ x ] += dp[ y ] ;
        if ( dist[ y ] + 1 < k ) { 
            aux.push_back ( dist[ y ] + 1 ) ;
        }
    }
    sort ( aux.begin ( ) , aux.end ( ) , greater < int > ( ) ) ;
    int sz = aux.size ( ) ;
    while ( sz >= 2 && aux[ sz - 1 ] + aux[ sz - 2 ] < k ) {
        -- sz , -- dp[ x ] ;
        aux.pop_back ( ) ;
    }
    if ( sz == 0 ) {
        ++ dp[ x ] ; dist[ x ] = 0 ;
    }
    else {
        dist[ x ] = aux.back ( ) ;
    }
}

void solve ( ) {
    cin >> n >> k ;
    for ( int i = 2 , x ; i <= n ; ++ i ) {
        cin >> x ; ++ x ;
        v[ x ].push_back ( i ) ;
    }
    dfs ( 1 ) ;
    cout << dp[ 1 ] << "\n" ;
}

int main ( ) {
    ios_base :: sync_with_stdio ( false ) ;
    cin.tie ( NULL ) ;
    int t = 1 ; // cin >> t ; 
    while ( t -- ) { solve ( ) ; }
    return 0 ;
}

Subtask #1
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 4948 KB Output is correct
2 Correct 3 ms 5020 KB Output is correct
3 Correct 4 ms 5076 KB Output is correct
4 Correct 3 ms 5024 KB Output is correct
5 Correct 3 ms 4940 KB Output is correct
6 Correct 3 ms 4948 KB Output is correct
7 Correct 3 ms 4948 KB Output is correct
8 Correct 3 ms 5028 KB Output is correct
9 Correct 2 ms 4948 KB Output is correct
10 Correct 3 ms 4948 KB Output is correct
11 Correct 3 ms 4972 KB Output is correct
12 Correct 3 ms 5028 KB Output is correct
13 Correct 3 ms 5024 KB Output is correct
14 Correct 3 ms 4948 KB Output is correct
15 Correct 3 ms 4948 KB Output is correct
16 Correct 3 ms 4948 KB Output is correct
17 Correct 3 ms 4948 KB Output is correct
18 Correct 3 ms 4948 KB Output is correct
19 Correct 3 ms 4948 KB Output is correct
20 Correct 3 ms 4948 KB Output is correct

Subtask #2
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 4948 KB Output is correct
2 Correct 3 ms 5020 KB Output is correct
3 Correct 4 ms 5076 KB Output is correct
4 Correct 3 ms 5024 KB Output is correct
5 Correct 3 ms 4940 KB Output is correct
6 Correct 3 ms 4948 KB Output is correct
7 Correct 3 ms 4948 KB Output is correct
8 Correct 3 ms 5028 KB Output is correct
9 Correct 2 ms 4948 KB Output is correct
10 Correct 3 ms 4948 KB Output is correct
11 Correct 3 ms 4972 KB Output is correct
12 Correct 3 ms 5028 KB Output is correct
13 Correct 3 ms 5024 KB Output is correct
14 Correct 3 ms 4948 KB Output is correct
15 Correct 3 ms 4948 KB Output is correct
16 Correct 3 ms 4948 KB Output is correct
17 Correct 3 ms 4948 KB Output is correct
18 Correct 3 ms 4948 KB Output is correct
19 Correct 3 ms 4948 KB Output is correct
20 Correct 3 ms 4948 KB Output is correct
21 Correct 3 ms 5204 KB Output is correct
22 Correct 3 ms 4948 KB Output is correct
23 Correct 3 ms 4948 KB Output is correct
24 Correct 3 ms 4948 KB Output is correct
25 Correct 4 ms 5028 KB Output is correct
26 Correct 3 ms 5028 KB Output is correct
27 Correct 3 ms 4948 KB Output is correct
28 Correct 4 ms 4948 KB Output is correct
29 Correct 3 ms 4948 KB Output is correct
30 Correct 3 ms 5076 KB Output is correct
31 Correct 3 ms 5036 KB Output is correct
32 Correct 3 ms 4948 KB Output is correct
33 Correct 3 ms 5028 KB Output is correct
34 Correct 3 ms 4948 KB Output is correct
35 Correct 3 ms 5028 KB Output is correct
36 Correct 3 ms 5032 KB Output is correct
37 Correct 3 ms 4948 KB Output is correct
38 Correct 3 ms 5076 KB Output is correct
39 Correct 3 ms 5076 KB Output is correct
40 Correct 3 ms 5204 KB Output is correct

Subtask #3
49.0 / 49.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 4948 KB Output is correct
2 Correct 3 ms 5020 KB Output is correct
3 Correct 4 ms 5076 KB Output is correct
4 Correct 3 ms 5024 KB Output is correct
5 Correct 3 ms 4940 KB Output is correct
6 Correct 3 ms 4948 KB Output is correct
7 Correct 3 ms 4948 KB Output is correct
8 Correct 3 ms 5028 KB Output is correct
9 Correct 2 ms 4948 KB Output is correct
10 Correct 3 ms 4948 KB Output is correct
11 Correct 3 ms 4972 KB Output is correct
12 Correct 3 ms 5028 KB Output is correct
13 Correct 3 ms 5024 KB Output is correct
14 Correct 3 ms 4948 KB Output is correct
15 Correct 3 ms 4948 KB Output is correct
16 Correct 3 ms 4948 KB Output is correct
17 Correct 3 ms 4948 KB Output is correct
18 Correct 3 ms 4948 KB Output is correct
19 Correct 3 ms 4948 KB Output is correct
20 Correct 3 ms 4948 KB Output is correct
21 Correct 3 ms 5204 KB Output is correct
22 Correct 3 ms 4948 KB Output is correct
23 Correct 3 ms 4948 KB Output is correct
24 Correct 3 ms 4948 KB Output is correct
25 Correct 4 ms 5028 KB Output is correct
26 Correct 3 ms 5028 KB Output is correct
27 Correct 3 ms 4948 KB Output is correct
28 Correct 4 ms 4948 KB Output is correct
29 Correct 3 ms 4948 KB Output is correct
30 Correct 3 ms 5076 KB Output is correct
31 Correct 3 ms 5036 KB Output is correct
32 Correct 3 ms 4948 KB Output is correct
33 Correct 3 ms 5028 KB Output is correct
34 Correct 3 ms 4948 KB Output is correct
35 Correct 3 ms 5028 KB Output is correct
36 Correct 3 ms 5032 KB Output is correct
37 Correct 3 ms 4948 KB Output is correct
38 Correct 3 ms 5076 KB Output is correct
39 Correct 3 ms 5076 KB Output is correct
40 Correct 3 ms 5204 KB Output is correct
41 Correct 33 ms 11592 KB Output is correct
42 Correct 24 ms 7860 KB Output is correct
43 Correct 29 ms 7876 KB Output is correct
44 Correct 27 ms 8008 KB Output is correct
45 Correct 26 ms 7964 KB Output is correct
46 Correct 55 ms 10860 KB Output is correct
47 Correct 64 ms 10956 KB Output is correct
48 Correct 58 ms 11044 KB Output is correct
49 Correct 62 ms 10968 KB Output is correct
50 Correct 14 ms 6732 KB Output is correct
51 Correct 13 ms 6740 KB Output is correct
52 Correct 15 ms 6700 KB Output is correct
53 Correct 30 ms 8664 KB Output is correct
54 Correct 25 ms 8468 KB Output is correct
55 Correct 24 ms 8364 KB Output is correct
56 Correct 3 ms 5076 KB Output is correct
57 Correct 8 ms 7764 KB Output is correct
58 Correct 23 ms 17536 KB Output is correct
59 Correct 53 ms 20296 KB Output is correct
60 Correct 35 ms 12220 KB Output is correct
61 Correct 46 ms 11576 KB Output is correct