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Submission #922658

# Submission time Handle Problem Language Result Execution time Memory
922658 2024-02-05T21:57:00 Z ksujay2 Cat Exercise (JOI23_ho_t4) C++17
100 / 100
 552 ms 58960 KB 
#include <bits/stdc++.h>
using namespace std;
using ll = long long;
int main() {
    int N; cin >> N;
    vector<int> P(N + 1), revP(N + 1);
    for(int i = 1; i <= N; i++) cin >> P[i], revP[P[i]] = i;
    vector<vector<int>> adj(N + 1);
    for(int i = 0; i < N - 1; i++) {
        int A, B; cin >> A >> B;
        adj[A].push_back(B);
        adj[B].push_back(A);
    }
    vector<vector<int>> jmp(N + 1, vector<int>(20));
    vector<int> dep(N + 1);
    function<void(int, int)> dfs = [&] (int s, int e) {
        jmp[s][0] = e;
        dep[s] = dep[e] + 1;
        for(int i = 0; i < 19; i++) {
            jmp[s][i + 1] = jmp[jmp[s][i]][i];
        }
        for(int u : adj[s]) if(u != e) dfs(u, s);
    };
    dfs(1, 0);
    auto lca = [&] (int a, int b) {
        if(dep[a] < dep[b]) swap(a, b);
        for(int i = 19; i >= 0; i--) {
            if(dep[jmp[a][i]] >= dep[b])
                a = jmp[a][i];
        }
        if(a == b) return a;
        for(int i = 19; i >= 0; i--) {
            if(jmp[a][i] != jmp[b][i]) {
                a = jmp[a][i];
                b = jmp[b][i];
            }
        }
        return jmp[a][0];
    };
    auto dist = [&] (int s, int t) {
        return dep[s] + dep[t] - 2 * dep[lca(s, t)];
    };
    vector<int> e(N + 1, -1);
    function<int(int)> get = [&] (int s) {
        return e[s] < 0 ? s : (e[s] = get(e[s]));
    };
    vector<ll> dp(N + 1);
    for(int i = 1; i <= N; i++) {
        int s = revP[i];
        for(int u : adj[s]) {
            if(P[u] <= i) {
                int g = get(u);
                dp[s] = max(dp[s], dist(s, g) + dp[g]);
                e[s] += e[g];
                e[g] = s;
            }
        }
    }
    cout << dp[revP[N]] << endl;
}

Subtask #1
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 344 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 344 KB Output is correct
8 Correct 1 ms 500 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 1 ms 600 KB Output is correct

Subtask #2
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 344 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 344 KB Output is correct
8 Correct 1 ms 500 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 1 ms 600 KB Output is correct
11 Correct 1 ms 348 KB Output is correct
12 Correct 1 ms 348 KB Output is correct
13 Correct 1 ms 348 KB Output is correct
14 Correct 1 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 1 ms 348 KB Output is correct
17 Correct 1 ms 348 KB Output is correct

Subtask #3
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 344 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 344 KB Output is correct
8 Correct 1 ms 500 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 1 ms 600 KB Output is correct
11 Correct 1 ms 348 KB Output is correct
12 Correct 1 ms 348 KB Output is correct
13 Correct 1 ms 348 KB Output is correct
14 Correct 1 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 1 ms 348 KB Output is correct
17 Correct 1 ms 348 KB Output is correct
18 Correct 5 ms 1628 KB Output is correct
19 Correct 5 ms 1760 KB Output is correct
20 Correct 5 ms 1628 KB Output is correct
21 Correct 5 ms 1628 KB Output is correct
22 Correct 5 ms 1628 KB Output is correct
23 Correct 5 ms 1628 KB Output is correct
24 Correct 5 ms 1624 KB Output is correct

Subtask #4
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 344 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 344 KB Output is correct
8 Correct 1 ms 500 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 1 ms 600 KB Output is correct
11 Correct 1 ms 348 KB Output is correct
12 Correct 1 ms 348 KB Output is correct
13 Correct 1 ms 348 KB Output is correct
14 Correct 1 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 1 ms 348 KB Output is correct
17 Correct 1 ms 348 KB Output is correct
18 Correct 5 ms 1628 KB Output is correct
19 Correct 5 ms 1760 KB Output is correct
20 Correct 5 ms 1628 KB Output is correct
21 Correct 5 ms 1628 KB Output is correct
22 Correct 5 ms 1628 KB Output is correct
23 Correct 5 ms 1628 KB Output is correct
24 Correct 5 ms 1624 KB Output is correct
25 Correct 0 ms 348 KB Output is correct
26 Correct 6 ms 1484 KB Output is correct
27 Correct 5 ms 1628 KB Output is correct
28 Correct 6 ms 1368 KB Output is correct
29 Correct 6 ms 1628 KB Output is correct
30 Correct 5 ms 1372 KB Output is correct
31 Correct 5 ms 1236 KB Output is correct
32 Correct 7 ms 1372 KB Output is correct
33 Correct 5 ms 1372 KB Output is correct

Subtask #5
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 344 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 344 KB Output is correct
8 Correct 1 ms 500 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 1 ms 600 KB Output is correct
11 Correct 1 ms 348 KB Output is correct
12 Correct 1 ms 348 KB Output is correct
13 Correct 1 ms 348 KB Output is correct
14 Correct 1 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 1 ms 348 KB Output is correct
17 Correct 1 ms 348 KB Output is correct
18 Correct 5 ms 1628 KB Output is correct
19 Correct 5 ms 1760 KB Output is correct
20 Correct 5 ms 1628 KB Output is correct
21 Correct 5 ms 1628 KB Output is correct
22 Correct 5 ms 1628 KB Output is correct
23 Correct 5 ms 1628 KB Output is correct
24 Correct 5 ms 1624 KB Output is correct
25 Correct 227 ms 55140 KB Output is correct
26 Correct 231 ms 58824 KB Output is correct
27 Correct 233 ms 58936 KB Output is correct
28 Correct 295 ms 58960 KB Output is correct
29 Correct 296 ms 58960 KB Output is correct
30 Correct 329 ms 58912 KB Output is correct
31 Correct 294 ms 58824 KB Output is correct

Subtask #6
23.0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 600 KB Output is correct
3 Correct 290 ms 39384 KB Output is correct
4 Correct 311 ms 39388 KB Output is correct
5 Correct 287 ms 39636 KB Output is correct

Subtask #7
26.0 / 26.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 344 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 344 KB Output is correct
8 Correct 1 ms 500 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 1 ms 600 KB Output is correct
11 Correct 1 ms 348 KB Output is correct
12 Correct 1 ms 348 KB Output is correct
13 Correct 1 ms 348 KB Output is correct
14 Correct 1 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 1 ms 348 KB Output is correct
17 Correct 1 ms 348 KB Output is correct
18 Correct 5 ms 1628 KB Output is correct
19 Correct 5 ms 1760 KB Output is correct
20 Correct 5 ms 1628 KB Output is correct
21 Correct 5 ms 1628 KB Output is correct
22 Correct 5 ms 1628 KB Output is correct
23 Correct 5 ms 1628 KB Output is correct
24 Correct 5 ms 1624 KB Output is correct
25 Correct 0 ms 348 KB Output is correct
26 Correct 6 ms 1484 KB Output is correct
27 Correct 5 ms 1628 KB Output is correct
28 Correct 6 ms 1368 KB Output is correct
29 Correct 6 ms 1628 KB Output is correct
30 Correct 5 ms 1372 KB Output is correct
31 Correct 5 ms 1236 KB Output is correct
32 Correct 7 ms 1372 KB Output is correct
33 Correct 5 ms 1372 KB Output is correct
34 Correct 227 ms 55140 KB Output is correct
35 Correct 231 ms 58824 KB Output is correct
36 Correct 233 ms 58936 KB Output is correct
37 Correct 295 ms 58960 KB Output is correct
38 Correct 296 ms 58960 KB Output is correct
39 Correct 329 ms 58912 KB Output is correct
40 Correct 294 ms 58824 KB Output is correct
41 Correct 0 ms 344 KB Output is correct
42 Correct 0 ms 600 KB Output is correct
43 Correct 290 ms 39384 KB Output is correct
44 Correct 311 ms 39388 KB Output is correct
45 Correct 287 ms 39636 KB Output is correct
46 Correct 552 ms 51992 KB Output is correct
47 Correct 467 ms 50512 KB Output is correct
48 Correct 492 ms 52676 KB Output is correct
49 Correct 503 ms 50628 KB Output is correct
50 Correct 436 ms 43556 KB Output is correct
51 Correct 407 ms 43332 KB Output is correct
52 Correct 424 ms 43472 KB Output is correct
53 Correct 411 ms 43720 KB Output is correct