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Submission #881658

# Submission time Handle Problem Language Result Execution time Memory
881658 2023-12-01T17:03:13 Z Alcabel Cat Exercise (JOI23_ho_t4) C++17
31 / 100
 515 ms 196948 KB 
#include <bits/stdc++.h>
using namespace std;

const int maxn = 5e3;
int a[maxn];
vector<int> g[maxn];
int mx[maxn][maxn], dist[maxn][maxn];

void dfsMax(int v, int p, int root) {
    for (const int& u : g[v]) {
        if (u != p) {
            mx[root][u] = max(mx[root][v], a[u]);
            dist[root][u] = dist[root][v] + 1;
            dfsMax(u, v, root);
        }
    }
}

void solve() {
    int n;
    cin >> n;
    vector<int> posOf(n);
    for (int i = 0; i < n; ++i) {
        cin >> a[i];
        --a[i];
        posOf[a[i]] = i;
    }
    for (int i = 0; i < n - 1; ++i) {
        int v, u;
        cin >> v >> u;
        --v, --u;
        g[v].emplace_back(u);
        g[u].emplace_back(v);
    }
    for (int r = 0; r < n; ++r) {
        mx[r][r] = a[r];
        dist[r][r] = 0;
        dfsMax(r, -1, r);
    }
    vector<long long> dp(n);
    for (int i = 0; i < n; ++i) {
        for (int j = 0; j < i; ++j) {
            if (mx[posOf[i]][posOf[j]] <= i) {
                dp[i] = max(dp[i], dp[j] + dist[posOf[i]][posOf[j]]);
            }
        }
    }
    cout << dp[n - 1] << '\n';
}

int main() {
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    
#ifdef LOCAL
    freopen("input.txt", "r", stdin);
    freopen("output.txt", "w", stdout);
    int T = 1;
    cin >> T;
    while (T--) {
        solve();
        cerr << "-----------\n";
        cout << "-----------\n";
    }
#else
    int T = 1;
    // cin >> T;
    while (T--) {
        solve();
    }
#endif

    return 0;
}

Subtask #1
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2652 KB Output is correct
2 Correct 1 ms 2652 KB Output is correct
3 Correct 1 ms 2652 KB Output is correct
4 Correct 1 ms 4680 KB Output is correct
5 Correct 1 ms 4700 KB Output is correct
6 Correct 1 ms 4700 KB Output is correct
7 Correct 1 ms 2396 KB Output is correct
8 Correct 1 ms 4700 KB Output is correct
9 Correct 1 ms 4700 KB Output is correct
10 Correct 1 ms 4700 KB Output is correct

Subtask #2
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2652 KB Output is correct
2 Correct 1 ms 2652 KB Output is correct
3 Correct 1 ms 2652 KB Output is correct
4 Correct 1 ms 4680 KB Output is correct
5 Correct 1 ms 4700 KB Output is correct
6 Correct 1 ms 4700 KB Output is correct
7 Correct 1 ms 2396 KB Output is correct
8 Correct 1 ms 4700 KB Output is correct
9 Correct 1 ms 4700 KB Output is correct
10 Correct 1 ms 4700 KB Output is correct
11 Correct 3 ms 14940 KB Output is correct
12 Correct 3 ms 14940 KB Output is correct
13 Correct 3 ms 14940 KB Output is correct
14 Correct 3 ms 14924 KB Output is correct
15 Correct 3 ms 14940 KB Output is correct
16 Correct 3 ms 14924 KB Output is correct
17 Correct 3 ms 14940 KB Output is correct

Subtask #3
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2652 KB Output is correct
2 Correct 1 ms 2652 KB Output is correct
3 Correct 1 ms 2652 KB Output is correct
4 Correct 1 ms 4680 KB Output is correct
5 Correct 1 ms 4700 KB Output is correct
6 Correct 1 ms 4700 KB Output is correct
7 Correct 1 ms 2396 KB Output is correct
8 Correct 1 ms 4700 KB Output is correct
9 Correct 1 ms 4700 KB Output is correct
10 Correct 1 ms 4700 KB Output is correct
11 Correct 3 ms 14940 KB Output is correct
12 Correct 3 ms 14940 KB Output is correct
13 Correct 3 ms 14940 KB Output is correct
14 Correct 3 ms 14924 KB Output is correct
15 Correct 3 ms 14940 KB Output is correct
16 Correct 3 ms 14924 KB Output is correct
17 Correct 3 ms 14940 KB Output is correct
18 Correct 249 ms 196784 KB Output is correct
19 Correct 246 ms 196944 KB Output is correct
20 Correct 247 ms 196944 KB Output is correct
21 Correct 260 ms 196848 KB Output is correct
22 Correct 263 ms 196944 KB Output is correct
23 Correct 263 ms 196692 KB Output is correct
24 Correct 256 ms 196948 KB Output is correct

Subtask #4
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2652 KB Output is correct
2 Correct 1 ms 2652 KB Output is correct
3 Correct 1 ms 2652 KB Output is correct
4 Correct 1 ms 4680 KB Output is correct
5 Correct 1 ms 4700 KB Output is correct
6 Correct 1 ms 4700 KB Output is correct
7 Correct 1 ms 2396 KB Output is correct
8 Correct 1 ms 4700 KB Output is correct
9 Correct 1 ms 4700 KB Output is correct
10 Correct 1 ms 4700 KB Output is correct
11 Correct 3 ms 14940 KB Output is correct
12 Correct 3 ms 14940 KB Output is correct
13 Correct 3 ms 14940 KB Output is correct
14 Correct 3 ms 14924 KB Output is correct
15 Correct 3 ms 14940 KB Output is correct
16 Correct 3 ms 14924 KB Output is correct
17 Correct 3 ms 14940 KB Output is correct
18 Correct 249 ms 196784 KB Output is correct
19 Correct 246 ms 196944 KB Output is correct
20 Correct 247 ms 196944 KB Output is correct
21 Correct 260 ms 196848 KB Output is correct
22 Correct 263 ms 196944 KB Output is correct
23 Correct 263 ms 196692 KB Output is correct
24 Correct 256 ms 196948 KB Output is correct
25 Correct 1 ms 2636 KB Output is correct
26 Correct 446 ms 196708 KB Output is correct
27 Correct 401 ms 196864 KB Output is correct
28 Correct 401 ms 196728 KB Output is correct
29 Correct 420 ms 196672 KB Output is correct
30 Correct 515 ms 196420 KB Output is correct
31 Correct 500 ms 196568 KB Output is correct
32 Correct 497 ms 196640 KB Output is correct
33 Correct 498 ms 196556 KB Output is correct

Subtask #5
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2652 KB Output is correct
2 Correct 1 ms 2652 KB Output is correct
3 Correct 1 ms 2652 KB Output is correct
4 Correct 1 ms 4680 KB Output is correct
5 Correct 1 ms 4700 KB Output is correct
6 Correct 1 ms 4700 KB Output is correct
7 Correct 1 ms 2396 KB Output is correct
8 Correct 1 ms 4700 KB Output is correct
9 Correct 1 ms 4700 KB Output is correct
10 Correct 1 ms 4700 KB Output is correct
11 Correct 3 ms 14940 KB Output is correct
12 Correct 3 ms 14940 KB Output is correct
13 Correct 3 ms 14940 KB Output is correct
14 Correct 3 ms 14924 KB Output is correct
15 Correct 3 ms 14940 KB Output is correct
16 Correct 3 ms 14924 KB Output is correct
17 Correct 3 ms 14940 KB Output is correct
18 Correct 249 ms 196784 KB Output is correct
19 Correct 246 ms 196944 KB Output is correct
20 Correct 247 ms 196944 KB Output is correct
21 Correct 260 ms 196848 KB Output is correct
22 Correct 263 ms 196944 KB Output is correct
23 Correct 263 ms 196692 KB Output is correct
24 Correct 256 ms 196948 KB Output is correct
25 Runtime error 6 ms 2396 KB Execution killed with signal 11
26 Halted 0 ms 0 KB -

Subtask #6
0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2652 KB Output is correct
2 Correct 2 ms 10844 KB Output is correct
3 Runtime error 6 ms 2396 KB Execution killed with signal 11
4 Halted 0 ms 0 KB -

Subtask #7
0 / 26.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2652 KB Output is correct
2 Correct 1 ms 2652 KB Output is correct
3 Correct 1 ms 2652 KB Output is correct
4 Correct 1 ms 4680 KB Output is correct
5 Correct 1 ms 4700 KB Output is correct
6 Correct 1 ms 4700 KB Output is correct
7 Correct 1 ms 2396 KB Output is correct
8 Correct 1 ms 4700 KB Output is correct
9 Correct 1 ms 4700 KB Output is correct
10 Correct 1 ms 4700 KB Output is correct
11 Correct 3 ms 14940 KB Output is correct
12 Correct 3 ms 14940 KB Output is correct
13 Correct 3 ms 14940 KB Output is correct
14 Correct 3 ms 14924 KB Output is correct
15 Correct 3 ms 14940 KB Output is correct
16 Correct 3 ms 14924 KB Output is correct
17 Correct 3 ms 14940 KB Output is correct
18 Correct 249 ms 196784 KB Output is correct
19 Correct 246 ms 196944 KB Output is correct
20 Correct 247 ms 196944 KB Output is correct
21 Correct 260 ms 196848 KB Output is correct
22 Correct 263 ms 196944 KB Output is correct
23 Correct 263 ms 196692 KB Output is correct
24 Correct 256 ms 196948 KB Output is correct
25 Correct 1 ms 2636 KB Output is correct
26 Correct 446 ms 196708 KB Output is correct
27 Correct 401 ms 196864 KB Output is correct
28 Correct 401 ms 196728 KB Output is correct
29 Correct 420 ms 196672 KB Output is correct
30 Correct 515 ms 196420 KB Output is correct
31 Correct 500 ms 196568 KB Output is correct
32 Correct 497 ms 196640 KB Output is correct
33 Correct 498 ms 196556 KB Output is correct
34 Runtime error 6 ms 2396 KB Execution killed with signal 11
35 Halted 0 ms 0 KB -