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Submission #932985

# Submission time Handle Problem Language Result Execution time Memory
932985 2024-02-24T17:07:47 Z LucaIlie Cat in a tree (BOI17_catinatree) C++17
51 / 100
 33 ms 13528 KB 
#include <bits/stdc++.h>

using namespace std;

const int MAX_N = 1e5;
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 2648 KB Output is correct
2 Correct 1 ms 2648 KB Output is correct
3 Correct 1 ms 2648 KB Output is correct
4 Correct 1 ms 2804 KB Output is correct
5 Correct 1 ms 2652 KB Output is correct
6 Correct 1 ms 2652 KB Output is correct
7 Correct 1 ms 2652 KB Output is correct
8 Correct 1 ms 2652 KB Output is correct
9 Correct 1 ms 2652 KB Output is correct
10 Correct 1 ms 2652 KB Output is correct
11 Correct 1 ms 2652 KB Output is correct
12 Correct 1 ms 2652 KB Output is correct
13 Correct 1 ms 2652 KB Output is correct
14 Correct 1 ms 2652 KB Output is correct
15 Correct 1 ms 2652 KB Output is correct
16 Correct 1 ms 2648 KB Output is correct
17 Correct 1 ms 2652 KB Output is correct
18 Correct 1 ms 2652 KB Output is correct
19 Correct 1 ms 2652 KB Output is correct
20 Correct 1 ms 2652 KB Output is correct

Subtask #2
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2648 KB Output is correct
2 Correct 1 ms 2648 KB Output is correct
3 Correct 1 ms 2648 KB Output is correct
4 Correct 1 ms 2804 KB Output is correct
5 Correct 1 ms 2652 KB Output is correct
6 Correct 1 ms 2652 KB Output is correct
7 Correct 1 ms 2652 KB Output is correct
8 Correct 1 ms 2652 KB Output is correct
9 Correct 1 ms 2652 KB Output is correct
10 Correct 1 ms 2652 KB Output is correct
11 Correct 1 ms 2652 KB Output is correct
12 Correct 1 ms 2652 KB Output is correct
13 Correct 1 ms 2652 KB Output is correct
14 Correct 1 ms 2652 KB Output is correct
15 Correct 1 ms 2652 KB Output is correct
16 Correct 1 ms 2648 KB Output is correct
17 Correct 1 ms 2652 KB Output is correct
18 Correct 1 ms 2652 KB Output is correct
19 Correct 1 ms 2652 KB Output is correct
20 Correct 1 ms 2652 KB Output is correct
21 Correct 1 ms 2908 KB Output is correct
22 Correct 1 ms 2652 KB Output is correct
23 Correct 1 ms 2652 KB Output is correct
24 Correct 1 ms 2652 KB Output is correct
25 Correct 1 ms 2652 KB Output is correct
26 Correct 1 ms 2652 KB Output is correct
27 Correct 1 ms 2652 KB Output is correct
28 Correct 1 ms 2652 KB Output is correct
29 Correct 1 ms 2904 KB Output is correct
30 Correct 1 ms 2652 KB Output is correct
31 Correct 1 ms 2652 KB Output is correct
32 Correct 1 ms 2652 KB Output is correct
33 Correct 1 ms 2652 KB Output is correct
34 Correct 1 ms 2792 KB Output is correct
35 Correct 1 ms 2652 KB Output is correct
36 Correct 1 ms 2652 KB Output is correct
37 Correct 1 ms 2652 KB Output is correct
38 Correct 1 ms 2652 KB Output is correct
39 Correct 1 ms 2652 KB Output is correct
40 Correct 1 ms 2908 KB Output is correct

Subtask #3
0 / 49.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2648 KB Output is correct
2 Correct 1 ms 2648 KB Output is correct
3 Correct 1 ms 2648 KB Output is correct
4 Correct 1 ms 2804 KB Output is correct
5 Correct 1 ms 2652 KB Output is correct
6 Correct 1 ms 2652 KB Output is correct
7 Correct 1 ms 2652 KB Output is correct
8 Correct 1 ms 2652 KB Output is correct
9 Correct 1 ms 2652 KB Output is correct
10 Correct 1 ms 2652 KB Output is correct
11 Correct 1 ms 2652 KB Output is correct
12 Correct 1 ms 2652 KB Output is correct
13 Correct 1 ms 2652 KB Output is correct
14 Correct 1 ms 2652 KB Output is correct
15 Correct 1 ms 2652 KB Output is correct
16 Correct 1 ms 2648 KB Output is correct
17 Correct 1 ms 2652 KB Output is correct
18 Correct 1 ms 2652 KB Output is correct
19 Correct 1 ms 2652 KB Output is correct
20 Correct 1 ms 2652 KB Output is correct
21 Correct 1 ms 2908 KB Output is correct
22 Correct 1 ms 2652 KB Output is correct
23 Correct 1 ms 2652 KB Output is correct
24 Correct 1 ms 2652 KB Output is correct
25 Correct 1 ms 2652 KB Output is correct
26 Correct 1 ms 2652 KB Output is correct
27 Correct 1 ms 2652 KB Output is correct
28 Correct 1 ms 2652 KB Output is correct
29 Correct 1 ms 2904 KB Output is correct
30 Correct 1 ms 2652 KB Output is correct
31 Correct 1 ms 2652 KB Output is correct
32 Correct 1 ms 2652 KB Output is correct
33 Correct 1 ms 2652 KB Output is correct
34 Correct 1 ms 2792 KB Output is correct
35 Correct 1 ms 2652 KB Output is correct
36 Correct 1 ms 2652 KB Output is correct
37 Correct 1 ms 2652 KB Output is correct
38 Correct 1 ms 2652 KB Output is correct
39 Correct 1 ms 2652 KB Output is correct
40 Correct 1 ms 2908 KB Output is correct
41 Runtime error 33 ms 13528 KB Execution killed with signal 11
42 Halted 0 ms 0 KB -