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Submission #643083

# Submission time Handle Problem Language Result Execution time Memory
643083 2022-09-21T07:33:39 Z two_sides Cat in a tree (BOI17_catinatree) C++17
100 / 100
 364 ms 408900 KB 
#include <bits/stdc++.h>

using namespace std;

template <class X, class Y>
bool cmax(X &a, const Y &b) {
    return a < b ? a = b, 1 : 0;
}

const int N = 2e5 + 5;
const int D = 500;

int dp[N][D], n, d, siz[N];
vector<int> adj[N];

void dfs1(int u) {
    dp[u][0] = 1;
    for (int v : adj[u]) {
        dfs1(v);
        for (int i = 0; i <= d; i++)
            cmax(dp[u][i], max(dp[v][max(i, d - i)] +
            dp[u][i], dp[v][i] + dp[u][max(i, d - i)]));
    }
    for (int i = d; i >= 0; i--)
        dp[u][i + 1] = dp[u][i];
    for (int i = d; i >= 0; i--)
        cmax(dp[u][i], dp[u][i + 1]);
}

void dfs2(int u) {
    dp[u][0] = d - 1; dp[u][1] = 0;
    for (int v : adj[u]) {
        dfs2(v); siz[u] += siz[v] + 1;
        for (int i = siz[u] / d + 1; i >= 0; i--)
            for (int j = min(i, siz[v] / d + 1); j >= 0; j--)
                if (dp[u][i - j] + dp[v][j] + 1 >= d)
                    cmax(dp[u][i], min(dp[u][i - j], dp[v][j] + 1));
    }
}

int main() {
    cin.tie(0)->sync_with_stdio(0);
    cin >> n >> d;
    for (int i = 1; i < n; i++) {
        int p; cin >> p; adj[p].push_back(i);
    }
    
    if (d + 1 < D) {
        dfs1(0); cout << dp[0][0];
    } else {
        memset(dp, 0xc0, sizeof dp); dfs2(0);
        for (int i = D - 1; i >= 0; i--)
            if (dp[0][i] >= 0) {
                cout << i; break;
            }
    }
}

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 4948 KB Output is correct
3 Correct 3 ms 5028 KB Output is correct
4 Correct 3 ms 4948 KB Output is correct
5 Correct 3 ms 4948 KB Output is correct
6 Correct 3 ms 4948 KB Output is correct
7 Correct 3 ms 5024 KB Output is correct
8 Correct 3 ms 4948 KB Output is correct
9 Correct 3 ms 4948 KB Output is correct
10 Correct 3 ms 4948 KB Output is correct
11 Correct 3 ms 4948 KB Output is correct
12 Correct 2 ms 4948 KB Output is correct
13 Correct 3 ms 5000 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 5140 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 4948 KB Output is correct
3 Correct 3 ms 5028 KB Output is correct
4 Correct 3 ms 4948 KB Output is correct
5 Correct 3 ms 4948 KB Output is correct
6 Correct 3 ms 4948 KB Output is correct
7 Correct 3 ms 5024 KB Output is correct
8 Correct 3 ms 4948 KB Output is correct
9 Correct 3 ms 4948 KB Output is correct
10 Correct 3 ms 4948 KB Output is correct
11 Correct 3 ms 4948 KB Output is correct
12 Correct 2 ms 4948 KB Output is correct
13 Correct 3 ms 5000 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 5140 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 142 ms 396512 KB Output is correct
22 Correct 3 ms 5972 KB Output is correct
23 Correct 4 ms 5972 KB Output is correct
24 Correct 3 ms 5972 KB Output is correct
25 Correct 3 ms 6996 KB Output is correct
26 Correct 3 ms 6996 KB Output is correct
27 Correct 4 ms 6996 KB Output is correct
28 Correct 4 ms 7892 KB Output is correct
29 Correct 4 ms 7976 KB Output is correct
30 Correct 4 ms 7976 KB Output is correct
31 Correct 4 ms 7976 KB Output is correct
32 Correct 4 ms 7892 KB Output is correct
33 Correct 5 ms 7892 KB Output is correct
34 Correct 4 ms 7764 KB Output is correct
35 Correct 4 ms 7720 KB Output is correct
36 Correct 4 ms 7892 KB Output is correct
37 Correct 4 ms 7892 KB Output is correct
38 Correct 4 ms 7892 KB Output is correct
39 Correct 4 ms 8020 KB Output is correct
40 Correct 4 ms 8148 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 4948 KB Output is correct
3 Correct 3 ms 5028 KB Output is correct
4 Correct 3 ms 4948 KB Output is correct
5 Correct 3 ms 4948 KB Output is correct
6 Correct 3 ms 4948 KB Output is correct
7 Correct 3 ms 5024 KB Output is correct
8 Correct 3 ms 4948 KB Output is correct
9 Correct 3 ms 4948 KB Output is correct
10 Correct 3 ms 4948 KB Output is correct
11 Correct 3 ms 4948 KB Output is correct
12 Correct 2 ms 4948 KB Output is correct
13 Correct 3 ms 5000 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 5140 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 142 ms 396512 KB Output is correct
22 Correct 3 ms 5972 KB Output is correct
23 Correct 4 ms 5972 KB Output is correct
24 Correct 3 ms 5972 KB Output is correct
25 Correct 3 ms 6996 KB Output is correct
26 Correct 3 ms 6996 KB Output is correct
27 Correct 4 ms 6996 KB Output is correct
28 Correct 4 ms 7892 KB Output is correct
29 Correct 4 ms 7976 KB Output is correct
30 Correct 4 ms 7976 KB Output is correct
31 Correct 4 ms 7976 KB Output is correct
32 Correct 4 ms 7892 KB Output is correct
33 Correct 5 ms 7892 KB Output is correct
34 Correct 4 ms 7764 KB Output is correct
35 Correct 4 ms 7720 KB Output is correct
36 Correct 4 ms 7892 KB Output is correct
37 Correct 4 ms 7892 KB Output is correct
38 Correct 4 ms 7892 KB Output is correct
39 Correct 4 ms 8020 KB Output is correct
40 Correct 4 ms 8148 KB Output is correct
41 Correct 269 ms 381592 KB Output is correct
42 Correct 102 ms 202840 KB Output is correct
43 Correct 115 ms 202816 KB Output is correct
44 Correct 120 ms 202880 KB Output is correct
45 Correct 141 ms 202816 KB Output is correct
46 Correct 206 ms 400668 KB Output is correct
47 Correct 246 ms 400924 KB Output is correct
48 Correct 263 ms 400784 KB Output is correct
49 Correct 364 ms 400756 KB Output is correct
50 Correct 90 ms 201676 KB Output is correct
51 Correct 94 ms 201560 KB Output is correct
52 Correct 97 ms 201620 KB Output is correct
53 Correct 186 ms 398364 KB Output is correct
54 Correct 191 ms 398168 KB Output is correct
55 Correct 194 ms 398252 KB Output is correct
56 Correct 5 ms 9812 KB Output is correct
57 Correct 149 ms 398712 KB Output is correct
58 Correct 172 ms 407176 KB Output is correct
59 Correct 226 ms 408900 KB Output is correct
60 Correct 190 ms 391804 KB Output is correct
61 Correct 290 ms 381848 KB Output is correct