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Submission #636679

# Submission time Handle Problem Language Result Execution time Memory
636679 2022-08-29T22:34:17 Z tvladm2009 Cat in a tree (BOI17_catinatree) C++14
100 / 100
 110 ms 17496 KB 
#include <iostream>
#include <algorithm>
#include <vector>

using namespace std;

const int MAX_N = 2 * 1e5;
vector<int> g[MAX_N + 1];
int dp[MAX_N + 1], dist[MAX_N + 1];
int n, d;

bool cmp(int x, int y) {
    return dist[x] < dist[y];
}

void dfs(int u, int p = -1) {
    if (g[u].size() == 0 || (g[u].size() == 1 && g[u][0] == p)) {
        dp[u] = 1;
        dist[u] = 0;
        return;
    }
    for (int v : g[u]) {
        if (v != p) {
            dfs(v, u);
        }
    }
    for (int v : g[u]) {
        if (v != p) {
            dp[u] += dp[v];
        }
    }
    sort(g[u].begin(), g[u].end(), cmp);
    int aux = g[u][0];
    if (g[u][0] == p) {
        aux = g[u][1];
    }
    for (int v : g[u]) {
        if (v != aux && v != p && dist[aux] + dist[v] + 2 < d) {
            dp[u]--;
            aux = v;
        }
    }
    dist[u] = dist[aux] + 1;
    if (dist[u] >= d) {
        dp[u]++;
        dist[u] = 0;
    }
}

int main() {
    cin >> n >> d;
    for (int i = 1; i <= n - 1; i++) {
        int x;
        cin >> x;
        g[x + 1].push_back(i + 1);
    }
    dfs(1);
    cout << dp[1];
    return 0;
}

Subtask #1
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 4948 KB Output is correct
2 Correct 3 ms 4948 KB Output is correct
3 Correct 3 ms 4948 KB Output is correct
4 Correct 3 ms 4948 KB Output is correct
5 Correct 2 ms 4948 KB Output is correct
6 Correct 3 ms 4948 KB Output is correct
7 Correct 3 ms 4948 KB Output is correct
8 Correct 2 ms 4948 KB Output is correct
9 Correct 2 ms 4948 KB Output is correct
10 Correct 2 ms 4948 KB Output is correct
11 Correct 3 ms 4948 KB Output is correct
12 Correct 3 ms 4948 KB Output is correct
13 Correct 3 ms 4948 KB Output is correct
14 Correct 2 ms 4948 KB Output is correct
15 Correct 3 ms 4948 KB Output is correct
16 Correct 3 ms 5008 KB Output is correct
17 Correct 2 ms 4948 KB Output is correct
18 Correct 3 ms 4948 KB Output is correct
19 Correct 2 ms 4948 KB Output is correct
20 Correct 2 ms 4948 KB Output is correct

Subtask #2
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 4948 KB Output is correct
2 Correct 3 ms 4948 KB Output is correct
3 Correct 3 ms 4948 KB Output is correct
4 Correct 3 ms 4948 KB Output is correct
5 Correct 2 ms 4948 KB Output is correct
6 Correct 3 ms 4948 KB Output is correct
7 Correct 3 ms 4948 KB Output is correct
8 Correct 2 ms 4948 KB Output is correct
9 Correct 2 ms 4948 KB Output is correct
10 Correct 2 ms 4948 KB Output is correct
11 Correct 3 ms 4948 KB Output is correct
12 Correct 3 ms 4948 KB Output is correct
13 Correct 3 ms 4948 KB Output is correct
14 Correct 2 ms 4948 KB Output is correct
15 Correct 3 ms 4948 KB Output is correct
16 Correct 3 ms 5008 KB Output is correct
17 Correct 2 ms 4948 KB Output is correct
18 Correct 3 ms 4948 KB Output is correct
19 Correct 2 ms 4948 KB Output is correct
20 Correct 2 ms 4948 KB Output is correct
21 Correct 3 ms 5076 KB Output is correct
22 Correct 3 ms 4948 KB Output is correct
23 Correct 4 ms 4948 KB Output is correct
24 Correct 2 ms 4948 KB Output is correct
25 Correct 3 ms 4948 KB Output is correct
26 Correct 2 ms 4948 KB Output is correct
27 Correct 3 ms 4948 KB Output is correct
28 Correct 3 ms 4948 KB Output is correct
29 Correct 3 ms 4948 KB Output is correct
30 Correct 3 ms 4948 KB Output is correct
31 Correct 3 ms 4948 KB Output is correct
32 Correct 2 ms 4948 KB Output is correct
33 Correct 2 ms 4948 KB Output is correct
34 Correct 3 ms 4948 KB Output is correct
35 Correct 3 ms 4948 KB Output is correct
36 Correct 3 ms 4948 KB Output is correct
37 Correct 3 ms 4948 KB Output is correct
38 Correct 4 ms 4948 KB Output is correct
39 Correct 3 ms 5072 KB Output is correct
40 Correct 3 ms 5076 KB Output is correct

Subtask #3
49.0 / 49.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 4948 KB Output is correct
2 Correct 3 ms 4948 KB Output is correct
3 Correct 3 ms 4948 KB Output is correct
4 Correct 3 ms 4948 KB Output is correct
5 Correct 2 ms 4948 KB Output is correct
6 Correct 3 ms 4948 KB Output is correct
7 Correct 3 ms 4948 KB Output is correct
8 Correct 2 ms 4948 KB Output is correct
9 Correct 2 ms 4948 KB Output is correct
10 Correct 2 ms 4948 KB Output is correct
11 Correct 3 ms 4948 KB Output is correct
12 Correct 3 ms 4948 KB Output is correct
13 Correct 3 ms 4948 KB Output is correct
14 Correct 2 ms 4948 KB Output is correct
15 Correct 3 ms 4948 KB Output is correct
16 Correct 3 ms 5008 KB Output is correct
17 Correct 2 ms 4948 KB Output is correct
18 Correct 3 ms 4948 KB Output is correct
19 Correct 2 ms 4948 KB Output is correct
20 Correct 2 ms 4948 KB Output is correct
21 Correct 3 ms 5076 KB Output is correct
22 Correct 3 ms 4948 KB Output is correct
23 Correct 4 ms 4948 KB Output is correct
24 Correct 2 ms 4948 KB Output is correct
25 Correct 3 ms 4948 KB Output is correct
26 Correct 2 ms 4948 KB Output is correct
27 Correct 3 ms 4948 KB Output is correct
28 Correct 3 ms 4948 KB Output is correct
29 Correct 3 ms 4948 KB Output is correct
30 Correct 3 ms 4948 KB Output is correct
31 Correct 3 ms 4948 KB Output is correct
32 Correct 2 ms 4948 KB Output is correct
33 Correct 2 ms 4948 KB Output is correct
34 Correct 3 ms 4948 KB Output is correct
35 Correct 3 ms 4948 KB Output is correct
36 Correct 3 ms 4948 KB Output is correct
37 Correct 3 ms 4948 KB Output is correct
38 Correct 4 ms 4948 KB Output is correct
39 Correct 3 ms 5072 KB Output is correct
40 Correct 3 ms 5076 KB Output is correct
41 Correct 64 ms 10224 KB Output is correct
42 Correct 38 ms 7272 KB Output is correct
43 Correct 39 ms 7372 KB Output is correct
44 Correct 37 ms 7380 KB Output is correct
45 Correct 40 ms 7388 KB Output is correct
46 Correct 88 ms 9664 KB Output is correct
47 Correct 110 ms 9756 KB Output is correct
48 Correct 87 ms 9736 KB Output is correct
49 Correct 89 ms 9776 KB Output is correct
50 Correct 25 ms 6352 KB Output is correct
51 Correct 25 ms 6356 KB Output is correct
52 Correct 26 ms 6348 KB Output is correct
53 Correct 56 ms 7584 KB Output is correct
54 Correct 49 ms 7664 KB Output is correct
55 Correct 48 ms 7612 KB Output is correct
56 Correct 3 ms 5076 KB Output is correct
57 Correct 9 ms 7252 KB Output is correct
58 Correct 38 ms 15628 KB Output is correct
59 Correct 82 ms 17496 KB Output is correct
60 Correct 64 ms 10700 KB Output is correct
61 Correct 75 ms 10424 KB Output is correct