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Submission #469355

# Submission time Handle Problem Language Result Execution time Memory
469355 2021-08-31T15:22:45 Z arujbansal Cat in a tree (BOI17_catinatree) C++17
100 / 100
 161 ms 93892 KB 
#include <bits/stdc++.h>

using namespace std;

void dbg_out() { cerr << endl; }
template<typename Head, typename... Tail>
void dbg_out(Head H, Tail... T) { cerr << ' ' << H; dbg_out(T...); }
#define dbg(...) cerr << "(" << #__VA_ARGS__ << "):", dbg_out(__VA_ARGS__)

#define rng_init mt19937 rng(chrono::steady_clock::now().time_since_epoch().count())
#define rng_seed(x) mt19937 rng(x)
#define all(x) (x).begin(), (x).end()
#define sz(x) (int) (x).size()
// #define int long long

const int MXN = 2e5 + 5, INF = 1e9 + 5;
int N, D;
vector<int> g[MXN];

deque<int> dfs(int u, int p) {
    deque<int> res = {1};

    for (const auto &v : g[u]) {
        if (v == p) continue;

        deque<int> merge = dfs(v, u);
        merge.push_front(merge.front());

        if (sz(merge) > sz(res))
            swap(merge, res);

        for (int i = 0; i < sz(merge); i++) {
            int val1 = merge[i] + (D - i < sz(res) ? res[max(i, D - i)] : 0);
            int val2 = res[i] + (D - i < sz(merge) ? merge[max(i, D - i)] : 0);
            res[i] = max({res[i], val1, val2});
        }

        for (int i = sz(merge) - 2; i >= 0; i--)
            res[i] = max(res[i], res[i + 1]);
    }

    return res;
}

void solve() {
    cin >> N >> D;

    for (int i = 1; i < N; i++) {
        int x;
        cin >> x;

        g[x].push_back(i);
        g[i].push_back(x);
    }   

    cout << dfs(0, -1).front();
}

signed main() {
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);

    int TC = 1;
    // cin >> TC;
    while (TC--) solve();
}

Subtask #1
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 4940 KB Output is correct
2 Correct 3 ms 4940 KB Output is correct
3 Correct 3 ms 4940 KB Output is correct
4 Correct 4 ms 4900 KB Output is correct
5 Correct 4 ms 4940 KB Output is correct
6 Correct 3 ms 4940 KB Output is correct
7 Correct 4 ms 4940 KB Output is correct
8 Correct 4 ms 4940 KB Output is correct
9 Correct 3 ms 4940 KB Output is correct
10 Correct 3 ms 4940 KB Output is correct
11 Correct 3 ms 4940 KB Output is correct
12 Correct 3 ms 4940 KB Output is correct
13 Correct 3 ms 4940 KB Output is correct
14 Correct 3 ms 4940 KB Output is correct
15 Correct 3 ms 4940 KB Output is correct
16 Correct 3 ms 4940 KB Output is correct
17 Correct 4 ms 4940 KB Output is correct
18 Correct 3 ms 4940 KB Output is correct
19 Correct 3 ms 4940 KB Output is correct
20 Correct 3 ms 4940 KB Output is correct

Subtask #2
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 4940 KB Output is correct
2 Correct 3 ms 4940 KB Output is correct
3 Correct 3 ms 4940 KB Output is correct
4 Correct 4 ms 4900 KB Output is correct
5 Correct 4 ms 4940 KB Output is correct
6 Correct 3 ms 4940 KB Output is correct
7 Correct 4 ms 4940 KB Output is correct
8 Correct 4 ms 4940 KB Output is correct
9 Correct 3 ms 4940 KB Output is correct
10 Correct 3 ms 4940 KB Output is correct
11 Correct 3 ms 4940 KB Output is correct
12 Correct 3 ms 4940 KB Output is correct
13 Correct 3 ms 4940 KB Output is correct
14 Correct 3 ms 4940 KB Output is correct
15 Correct 3 ms 4940 KB Output is correct
16 Correct 3 ms 4940 KB Output is correct
17 Correct 4 ms 4940 KB Output is correct
18 Correct 3 ms 4940 KB Output is correct
19 Correct 3 ms 4940 KB Output is correct
20 Correct 3 ms 4940 KB Output is correct
21 Correct 5 ms 6220 KB Output is correct
22 Correct 4 ms 4940 KB Output is correct
23 Correct 3 ms 4940 KB Output is correct
24 Correct 4 ms 4940 KB Output is correct
25 Correct 4 ms 4940 KB Output is correct
26 Correct 4 ms 4940 KB Output is correct
27 Correct 4 ms 4940 KB Output is correct
28 Correct 4 ms 5068 KB Output is correct
29 Correct 4 ms 5068 KB Output is correct
30 Correct 4 ms 5016 KB Output is correct
31 Correct 4 ms 5068 KB Output is correct
32 Correct 4 ms 5068 KB Output is correct
33 Correct 4 ms 5068 KB Output is correct
34 Correct 4 ms 5068 KB Output is correct
35 Correct 5 ms 5068 KB Output is correct
36 Correct 4 ms 5068 KB Output is correct
37 Correct 4 ms 5068 KB Output is correct
38 Correct 5 ms 5196 KB Output is correct
39 Correct 5 ms 5452 KB Output is correct
40 Correct 5 ms 6168 KB Output is correct

Subtask #3
49.0 / 49.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 4940 KB Output is correct
2 Correct 3 ms 4940 KB Output is correct
3 Correct 3 ms 4940 KB Output is correct
4 Correct 4 ms 4900 KB Output is correct
5 Correct 4 ms 4940 KB Output is correct
6 Correct 3 ms 4940 KB Output is correct
7 Correct 4 ms 4940 KB Output is correct
8 Correct 4 ms 4940 KB Output is correct
9 Correct 3 ms 4940 KB Output is correct
10 Correct 3 ms 4940 KB Output is correct
11 Correct 3 ms 4940 KB Output is correct
12 Correct 3 ms 4940 KB Output is correct
13 Correct 3 ms 4940 KB Output is correct
14 Correct 3 ms 4940 KB Output is correct
15 Correct 3 ms 4940 KB Output is correct
16 Correct 3 ms 4940 KB Output is correct
17 Correct 4 ms 4940 KB Output is correct
18 Correct 3 ms 4940 KB Output is correct
19 Correct 3 ms 4940 KB Output is correct
20 Correct 3 ms 4940 KB Output is correct
21 Correct 5 ms 6220 KB Output is correct
22 Correct 4 ms 4940 KB Output is correct
23 Correct 3 ms 4940 KB Output is correct
24 Correct 4 ms 4940 KB Output is correct
25 Correct 4 ms 4940 KB Output is correct
26 Correct 4 ms 4940 KB Output is correct
27 Correct 4 ms 4940 KB Output is correct
28 Correct 4 ms 5068 KB Output is correct
29 Correct 4 ms 5068 KB Output is correct
30 Correct 4 ms 5016 KB Output is correct
31 Correct 4 ms 5068 KB Output is correct
32 Correct 4 ms 5068 KB Output is correct
33 Correct 4 ms 5068 KB Output is correct
34 Correct 4 ms 5068 KB Output is correct
35 Correct 5 ms 5068 KB Output is correct
36 Correct 4 ms 5068 KB Output is correct
37 Correct 4 ms 5068 KB Output is correct
38 Correct 5 ms 5196 KB Output is correct
39 Correct 5 ms 5452 KB Output is correct
40 Correct 5 ms 6168 KB Output is correct
41 Correct 75 ms 12096 KB Output is correct
42 Correct 49 ms 8688 KB Output is correct
43 Correct 47 ms 8772 KB Output is correct
44 Correct 60 ms 8728 KB Output is correct
45 Correct 58 ms 8900 KB Output is correct
46 Correct 127 ms 12612 KB Output is correct
47 Correct 126 ms 12612 KB Output is correct
48 Correct 135 ms 12640 KB Output is correct
49 Correct 154 ms 12600 KB Output is correct
50 Correct 50 ms 9036 KB Output is correct
51 Correct 47 ms 8984 KB Output is correct
52 Correct 46 ms 9052 KB Output is correct
53 Correct 98 ms 13068 KB Output is correct
54 Correct 96 ms 12996 KB Output is correct
55 Correct 95 ms 13192 KB Output is correct
56 Correct 4 ms 5836 KB Output is correct
57 Correct 20 ms 22072 KB Output is correct
58 Correct 84 ms 81860 KB Output is correct
59 Correct 161 ms 93892 KB Output is correct
60 Correct 95 ms 12236 KB Output is correct
61 Correct 103 ms 12248 KB Output is correct