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Submission #932986

# Submission time Handle Problem Language Result Execution time Memory
932986 2024-02-24T17:08:07 Z LucaIlie Cat in a tree (BOI17_catinatree) C++17
100 / 100
 77 ms 26448 KB 
#include <bits/stdc++.h>

using namespace std;

const int MAX_N = 2e5;
int n, d;
int cats[MAX_N], dist[MAX_N];
vector<int> adj[MAX_N];

struct cd {
    int cats, dist;
};

void dfs( int u ) {
    vector<cd> o;

    cats[u] = 0;
    dist[u] = n;
    o.push_back( { 1, 0 } );
    for ( int v: adj[u] ) {
        dfs( v );
        o.push_back( { cats[v], dist[v] + 1 } );
    }

    sort( o.begin(), o.end(), []( cd a, cd b ) {
        return a.dist < b.dist;
    } );

    int i;
    for ( i = 0; i < o.size() - 1; i++ ) {
        if ( o[i].dist + o[i + 1].dist < d )
            cats[u] += o[i].cats - 1;
        else
            break;
    }
    for ( ; i < o.size(); i++ ) {
        cats[u] += o[i].cats;
        dist[u] = min( dist[u], o[i].dist );
    }
}

int main() {
    cin >> n >> d;
    for ( int v = 1; v < n; v++ ) {
        int p;
        cin >> p;
        adj[p].push_back( v );
    }

    dfs( 0 );

    cout << cats[0];

    return 0;
}

Compilation message

catinatree.cpp: In function 'void dfs(int)':
catinatree.cpp:30:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<cd>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   30 |     for ( i = 0; i < o.size() - 1; i++ ) {
      |                  ~~^~~~~~~~~~~~~~
catinatree.cpp:36:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<cd>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   36 |     for ( ; i < o.size(); i++ ) {
      |             ~~^~~~~~~~~~

Subtask #1
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 4956 KB Output is correct
2 Correct 2 ms 5208 KB Output is correct
3 Correct 1 ms 4952 KB Output is correct
4 Correct 1 ms 4956 KB Output is correct
5 Correct 1 ms 4956 KB Output is correct
6 Correct 1 ms 4956 KB Output is correct
7 Correct 1 ms 4956 KB Output is correct
8 Correct 2 ms 4952 KB Output is correct
9 Correct 2 ms 4956 KB Output is correct
10 Correct 1 ms 4956 KB Output is correct
11 Correct 1 ms 4952 KB Output is correct
12 Correct 1 ms 4956 KB Output is correct
13 Correct 1 ms 4956 KB Output is correct
14 Correct 1 ms 4956 KB Output is correct
15 Correct 1 ms 4956 KB Output is correct
16 Correct 1 ms 4956 KB Output is correct
17 Correct 1 ms 4952 KB Output is correct
18 Correct 1 ms 4956 KB Output is correct
19 Correct 1 ms 4956 KB Output is correct
20 Correct 1 ms 4956 KB Output is correct

Subtask #2
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 4956 KB Output is correct
2 Correct 2 ms 5208 KB Output is correct
3 Correct 1 ms 4952 KB Output is correct
4 Correct 1 ms 4956 KB Output is correct
5 Correct 1 ms 4956 KB Output is correct
6 Correct 1 ms 4956 KB Output is correct
7 Correct 1 ms 4956 KB Output is correct
8 Correct 2 ms 4952 KB Output is correct
9 Correct 2 ms 4956 KB Output is correct
10 Correct 1 ms 4956 KB Output is correct
11 Correct 1 ms 4952 KB Output is correct
12 Correct 1 ms 4956 KB Output is correct
13 Correct 1 ms 4956 KB Output is correct
14 Correct 1 ms 4956 KB Output is correct
15 Correct 1 ms 4956 KB Output is correct
16 Correct 1 ms 4956 KB Output is correct
17 Correct 1 ms 4952 KB Output is correct
18 Correct 1 ms 4956 KB Output is correct
19 Correct 1 ms 4956 KB Output is correct
20 Correct 1 ms 4956 KB Output is correct
21 Correct 2 ms 5212 KB Output is correct
22 Correct 1 ms 4956 KB Output is correct
23 Correct 1 ms 4956 KB Output is correct
24 Correct 1 ms 4956 KB Output is correct
25 Correct 2 ms 4952 KB Output is correct
26 Correct 2 ms 4956 KB Output is correct
27 Correct 1 ms 4956 KB Output is correct
28 Correct 2 ms 4956 KB Output is correct
29 Correct 2 ms 4956 KB Output is correct
30 Correct 2 ms 4952 KB Output is correct
31 Correct 2 ms 4956 KB Output is correct
32 Correct 1 ms 4956 KB Output is correct
33 Correct 1 ms 4956 KB Output is correct
34 Correct 1 ms 4956 KB Output is correct
35 Correct 1 ms 4956 KB Output is correct
36 Correct 1 ms 4952 KB Output is correct
37 Correct 2 ms 4956 KB Output is correct
38 Correct 2 ms 5212 KB Output is correct
39 Correct 2 ms 5212 KB Output is correct
40 Correct 2 ms 5212 KB Output is correct

Subtask #3
49.0 / 49.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 4956 KB Output is correct
2 Correct 2 ms 5208 KB Output is correct
3 Correct 1 ms 4952 KB Output is correct
4 Correct 1 ms 4956 KB Output is correct
5 Correct 1 ms 4956 KB Output is correct
6 Correct 1 ms 4956 KB Output is correct
7 Correct 1 ms 4956 KB Output is correct
8 Correct 2 ms 4952 KB Output is correct
9 Correct 2 ms 4956 KB Output is correct
10 Correct 1 ms 4956 KB Output is correct
11 Correct 1 ms 4952 KB Output is correct
12 Correct 1 ms 4956 KB Output is correct
13 Correct 1 ms 4956 KB Output is correct
14 Correct 1 ms 4956 KB Output is correct
15 Correct 1 ms 4956 KB Output is correct
16 Correct 1 ms 4956 KB Output is correct
17 Correct 1 ms 4952 KB Output is correct
18 Correct 1 ms 4956 KB Output is correct
19 Correct 1 ms 4956 KB Output is correct
20 Correct 1 ms 4956 KB Output is correct
21 Correct 2 ms 5212 KB Output is correct
22 Correct 1 ms 4956 KB Output is correct
23 Correct 1 ms 4956 KB Output is correct
24 Correct 1 ms 4956 KB Output is correct
25 Correct 2 ms 4952 KB Output is correct
26 Correct 2 ms 4956 KB Output is correct
27 Correct 1 ms 4956 KB Output is correct
28 Correct 2 ms 4956 KB Output is correct
29 Correct 2 ms 4956 KB Output is correct
30 Correct 2 ms 4952 KB Output is correct
31 Correct 2 ms 4956 KB Output is correct
32 Correct 1 ms 4956 KB Output is correct
33 Correct 1 ms 4956 KB Output is correct
34 Correct 1 ms 4956 KB Output is correct
35 Correct 1 ms 4956 KB Output is correct
36 Correct 1 ms 4952 KB Output is correct
37 Correct 2 ms 4956 KB Output is correct
38 Correct 2 ms 5212 KB Output is correct
39 Correct 2 ms 5212 KB Output is correct
40 Correct 2 ms 5212 KB Output is correct
41 Correct 54 ms 11080 KB Output is correct
42 Correct 33 ms 8016 KB Output is correct
43 Correct 33 ms 7872 KB Output is correct
44 Correct 33 ms 8020 KB Output is correct
45 Correct 33 ms 8028 KB Output is correct
46 Correct 68 ms 10836 KB Output is correct
47 Correct 74 ms 10836 KB Output is correct
48 Correct 70 ms 10832 KB Output is correct
49 Correct 71 ms 11064 KB Output is correct
50 Correct 21 ms 6748 KB Output is correct
51 Correct 23 ms 6824 KB Output is correct
52 Correct 27 ms 6824 KB Output is correct
53 Correct 44 ms 8580 KB Output is correct
54 Correct 42 ms 8500 KB Output is correct
55 Correct 40 ms 8528 KB Output is correct
56 Correct 2 ms 5212 KB Output is correct
57 Correct 10 ms 9180 KB Output is correct
58 Correct 42 ms 23176 KB Output is correct
59 Correct 77 ms 26448 KB Output is correct
60 Correct 67 ms 12704 KB Output is correct
61 Correct 66 ms 11600 KB Output is correct