답안 #890921

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
890921	2023-12-22T05:16:15 Z	juliany2	Cat Exercise (JOI23_ho_t4)	C++17	54 / 100	140 ms	37716 KB

Main

#include<bits/stdc++.h>
using namespace std;
using ll = long long;
#define all(x) (x).begin(), (x).end()

const int N = 2e5 + 7, L = 19;
int n;
int p[N];
vector<int> adj[N];
int lift[N][L], dep[N], dp[N], e[N];

int get(int x) {
    return e[x] == x ? x : e[x] = get(e[x]);
}

void dfs(int v = 1, int p = 0, int d = 0) {
    dep[v] = d;
    lift[v][0] = p;
    for (int i = 1; i < L; i++)
        lift[v][i] = lift[lift[v][i - 1]][i - 1];

    for (int u : adj[v])
        if (u != p)
            dfs(u, v, d + 1);
}

int lca(int u, int v) {
    if (dep[u] > dep[v])
        swap(u, v);

    for (int i = L - 1; ~i; --i)
        if (dep[v] - (1 << i) >= dep[u])
            v = lift[v][i];

    if (u == v)
        return u;

    for (int i = L - 1; ~i; --i)
        if (lift[v][i] != lift[u][i])
            v = lift[v][i], u = lift[u][i];
    return lift[u][0];
}

int dist(int u, int v) {
    return dep[u] + dep[v] - 2 * dep[lca(u, v)];
}

int main() {
    cin.tie(0)->sync_with_stdio(false);

    cin >> n;

    for (int i = 1; i <= n; i++)
        cin >> p[i];

    for (int i = 1; i < n; i++) {
        int u, v;
        cin >> u >> v;

        u = p[u], v = p[v];
        adj[u].push_back(v);
        adj[v].push_back(u);
    }

    dfs();

    iota(e + 1, e + n + 1, 1);

    for (int i = 1; i <= n; i++) {
        for (int u : adj[i]) {
            u = get(u);
            if (u < i) {
                dp[i] = max(dp[i], dp[u] + dist(i, u));
                e[u] = i;
            }
        }
    }

    cout << dp[n] << '\n';

    return 0;
}

Subtask #1
7.0 / 7.0

#	결과	실행 시간	메모리	Grader output
1	Correct	2 ms	9820 KB	Output is correct
2	Correct	2 ms	9884 KB	Output is correct
3	Correct	2 ms	9888 KB	Output is correct
4	Correct	3 ms	9820 KB	Output is correct
5	Correct	2 ms	9820 KB	Output is correct
6	Correct	2 ms	9820 KB	Output is correct
7	Correct	2 ms	9820 KB	Output is correct
8	Correct	2 ms	9820 KB	Output is correct
9	Correct	2 ms	9880 KB	Output is correct
10	Correct	2 ms	9820 KB	Output is correct

Subtask #2
7.0 / 7.0

#	결과	실행 시간	메모리	Grader output
1	Correct	2 ms	9820 KB	Output is correct
2	Correct	2 ms	9884 KB	Output is correct
3	Correct	2 ms	9888 KB	Output is correct
4	Correct	3 ms	9820 KB	Output is correct
5	Correct	2 ms	9820 KB	Output is correct
6	Correct	2 ms	9820 KB	Output is correct
7	Correct	2 ms	9820 KB	Output is correct
8	Correct	2 ms	9820 KB	Output is correct
9	Correct	2 ms	9880 KB	Output is correct
10	Correct	2 ms	9820 KB	Output is correct
11	Correct	2 ms	9820 KB	Output is correct
12	Correct	2 ms	9912 KB	Output is correct
13	Correct	2 ms	9820 KB	Output is correct
14	Correct	2 ms	9820 KB	Output is correct
15	Correct	2 ms	9820 KB	Output is correct
16	Correct	2 ms	9816 KB	Output is correct
17	Correct	2 ms	9820 KB	Output is correct

Subtask #3
7.0 / 7.0

#	결과	실행 시간	메모리	Grader output
1	Correct	2 ms	9820 KB	Output is correct
2	Correct	2 ms	9884 KB	Output is correct
3	Correct	2 ms	9888 KB	Output is correct
4	Correct	3 ms	9820 KB	Output is correct
5	Correct	2 ms	9820 KB	Output is correct
6	Correct	2 ms	9820 KB	Output is correct
7	Correct	2 ms	9820 KB	Output is correct
8	Correct	2 ms	9820 KB	Output is correct
9	Correct	2 ms	9880 KB	Output is correct
10	Correct	2 ms	9820 KB	Output is correct
11	Correct	2 ms	9820 KB	Output is correct
12	Correct	2 ms	9912 KB	Output is correct
13	Correct	2 ms	9820 KB	Output is correct
14	Correct	2 ms	9820 KB	Output is correct
15	Correct	2 ms	9820 KB	Output is correct
16	Correct	2 ms	9816 KB	Output is correct
17	Correct	2 ms	9820 KB	Output is correct
18	Correct	4 ms	10072 KB	Output is correct
19	Correct	4 ms	10332 KB	Output is correct
20	Correct	4 ms	10332 KB	Output is correct
21	Correct	4 ms	10228 KB	Output is correct
22	Correct	4 ms	10332 KB	Output is correct
23	Correct	4 ms	10076 KB	Output is correct
24	Correct	4 ms	10328 KB	Output is correct

Subtask #4
10.0 / 10.0

#	결과	실행 시간	메모리	Grader output
1	Correct	2 ms	9820 KB	Output is correct
2	Correct	2 ms	9884 KB	Output is correct
3	Correct	2 ms	9888 KB	Output is correct
4	Correct	3 ms	9820 KB	Output is correct
5	Correct	2 ms	9820 KB	Output is correct
6	Correct	2 ms	9820 KB	Output is correct
7	Correct	2 ms	9820 KB	Output is correct
8	Correct	2 ms	9820 KB	Output is correct
9	Correct	2 ms	9880 KB	Output is correct
10	Correct	2 ms	9820 KB	Output is correct
11	Correct	2 ms	9820 KB	Output is correct
12	Correct	2 ms	9912 KB	Output is correct
13	Correct	2 ms	9820 KB	Output is correct
14	Correct	2 ms	9820 KB	Output is correct
15	Correct	2 ms	9820 KB	Output is correct
16	Correct	2 ms	9816 KB	Output is correct
17	Correct	2 ms	9820 KB	Output is correct
18	Correct	4 ms	10072 KB	Output is correct
19	Correct	4 ms	10332 KB	Output is correct
20	Correct	4 ms	10332 KB	Output is correct
21	Correct	4 ms	10228 KB	Output is correct
22	Correct	4 ms	10332 KB	Output is correct
23	Correct	4 ms	10076 KB	Output is correct
24	Correct	4 ms	10328 KB	Output is correct
25	Correct	2 ms	9816 KB	Output is correct
26	Correct	4 ms	10076 KB	Output is correct
27	Correct	4 ms	10076 KB	Output is correct
28	Correct	4 ms	10076 KB	Output is correct
29	Correct	4 ms	10076 KB	Output is correct
30	Correct	4 ms	10076 KB	Output is correct
31	Correct	4 ms	10160 KB	Output is correct
32	Correct	5 ms	10076 KB	Output is correct
33	Correct	4 ms	10072 KB	Output is correct

Subtask #5
0 / 20.0

#	결과	실행 시간	메모리	Grader output
1	Correct	2 ms	9820 KB	Output is correct
2	Correct	2 ms	9884 KB	Output is correct
3	Correct	2 ms	9888 KB	Output is correct
4	Correct	3 ms	9820 KB	Output is correct
5	Correct	2 ms	9820 KB	Output is correct
6	Correct	2 ms	9820 KB	Output is correct
7	Correct	2 ms	9820 KB	Output is correct
8	Correct	2 ms	9820 KB	Output is correct
9	Correct	2 ms	9880 KB	Output is correct
10	Correct	2 ms	9820 KB	Output is correct
11	Correct	2 ms	9820 KB	Output is correct
12	Correct	2 ms	9912 KB	Output is correct
13	Correct	2 ms	9820 KB	Output is correct
14	Correct	2 ms	9820 KB	Output is correct
15	Correct	2 ms	9820 KB	Output is correct
16	Correct	2 ms	9816 KB	Output is correct
17	Correct	2 ms	9820 KB	Output is correct
18	Correct	4 ms	10072 KB	Output is correct
19	Correct	4 ms	10332 KB	Output is correct
20	Correct	4 ms	10332 KB	Output is correct
21	Correct	4 ms	10228 KB	Output is correct
22	Correct	4 ms	10332 KB	Output is correct
23	Correct	4 ms	10076 KB	Output is correct
24	Correct	4 ms	10328 KB	Output is correct
25	Incorrect	98 ms	37716 KB	Output isn't correct
26	Halted	0 ms	0 KB	-

Subtask #6
23.0 / 23.0

#	결과	실행 시간	메모리	Grader output
1	Correct	2 ms	9816 KB	Output is correct
2	Correct	2 ms	9820 KB	Output is correct
3	Correct	131 ms	32892 KB	Output is correct
4	Correct	140 ms	32892 KB	Output is correct
5	Correct	128 ms	33068 KB	Output is correct

Subtask #7
0 / 26.0

#	결과	실행 시간	메모리	Grader output
1	Correct	2 ms	9820 KB	Output is correct
2	Correct	2 ms	9884 KB	Output is correct
3	Correct	2 ms	9888 KB	Output is correct
4	Correct	3 ms	9820 KB	Output is correct
5	Correct	2 ms	9820 KB	Output is correct
6	Correct	2 ms	9820 KB	Output is correct
7	Correct	2 ms	9820 KB	Output is correct
8	Correct	2 ms	9820 KB	Output is correct
9	Correct	2 ms	9880 KB	Output is correct
10	Correct	2 ms	9820 KB	Output is correct
11	Correct	2 ms	9820 KB	Output is correct
12	Correct	2 ms	9912 KB	Output is correct
13	Correct	2 ms	9820 KB	Output is correct
14	Correct	2 ms	9820 KB	Output is correct
15	Correct	2 ms	9820 KB	Output is correct
16	Correct	2 ms	9816 KB	Output is correct
17	Correct	2 ms	9820 KB	Output is correct
18	Correct	4 ms	10072 KB	Output is correct
19	Correct	4 ms	10332 KB	Output is correct
20	Correct	4 ms	10332 KB	Output is correct
21	Correct	4 ms	10228 KB	Output is correct
22	Correct	4 ms	10332 KB	Output is correct
23	Correct	4 ms	10076 KB	Output is correct
24	Correct	4 ms	10328 KB	Output is correct
25	Correct	2 ms	9816 KB	Output is correct
26	Correct	4 ms	10076 KB	Output is correct
27	Correct	4 ms	10076 KB	Output is correct
28	Correct	4 ms	10076 KB	Output is correct
29	Correct	4 ms	10076 KB	Output is correct
30	Correct	4 ms	10076 KB	Output is correct
31	Correct	4 ms	10160 KB	Output is correct
32	Correct	5 ms	10076 KB	Output is correct
33	Correct	4 ms	10072 KB	Output is correct
34	Incorrect	98 ms	37716 KB	Output isn't correct
35	Halted	0 ms	0 KB	-

답안 #890921

Compilation message

Subtask #1 7.0 / 7.0

Subtask #2 7.0 / 7.0

Subtask #3 7.0 / 7.0

Subtask #4 10.0 / 10.0

Subtask #5 0 / 20.0

Subtask #6 23.0 / 23.0

Subtask #7 0 / 26.0

Subtask #1
7.0 / 7.0

Subtask #2
7.0 / 7.0

Subtask #3
7.0 / 7.0

Subtask #4
10.0 / 10.0

Subtask #5
0 / 20.0

Subtask #6
23.0 / 23.0

Subtask #7
0 / 26.0