Submission #938817

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
938817	2024-03-05T15:29:09 Z	THXuan	Cat Exercise (JOI23_ho_t4)	C++14	54 / 100	310 ms	41728 KB

Main

#include <iostream>
#include <vector>
#include <algorithm>
#include <queue>
#include <set>
#include <map>
#define INF 1e18
using namespace std;
typedef long long ll;

vector<int>adj[200005];
int d[200005],par[200005], p[200005][20], dp[200005];

void dfs(int s, int e) {
	for (int i = 1; i <=18; i++) {
		p[s][i] = p[p[s][i - 1]][i - 1];
	}
	for (auto u : adj[s]) {
		if (u == e) continue;
		d[u] = d[s] + 1;
		p[u][0] = s;
		dfs(u, s);
	}
}

int lca(int a, int b) {
	if (d[a] > d[b]) swap(a, b);
	int dist = d[b] - d[a];
	for (int i = 0; i <= 18; i++) {
		if (dist & (1 << i))b = p[b][i];
	}
	if (a == b) return a;
	for (int i = 18; i >= 0; i--) {
		if (p[a][i] != p[b][i]) {
			a = p[a][i];
			b = p[b][i];
		}
	}
	return p[a][0];
}

int find(int x) {
	while (x != par[x])x = par[x];
	return x;
}

int get_dist(int a, int b) {
	int lcaa = lca(a, b);
	return (d[a] - d[lcaa]) + (d[b] - d[lcaa]);
}

void solve()
{
	int n; cin >> n;
	vector<int>v(n + 1);
	for (int i = 1; i <= n; i++) cin >> v[i];
	for (int i = 1; i <= n - 1; i++) {
		int a, b; cin >> a >> b;
		a = v[a]; b = v[b];
		adj[a].push_back(b);
		adj[b].push_back(a);
	}
	dfs(1, 0);
	for (int i = 1; i <= n; i++) par[i] = i;
	for (int i = 1; i <= n; i++) {
		for (auto u : adj[i]) {
			u = find(u);
			if (u < i) {
				par[u] = i;
				dp[i] = max(dp[i], dp[u] + get_dist(i, u));
			}
		}
	}
	cout << dp[n] << "\n";
}

int main()
{
	ios_base::sync_with_stdio(0);
	cin.tie(0);
	int t = 1;// cin>>t;
	while (t--) solve();
	return 0;
}

Subtask #1
7.0 / 7.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	2 ms	8536 KB	Output is correct
2	Correct	3 ms	8540 KB	Output is correct
3	Correct	3 ms	8612 KB	Output is correct
4	Correct	3 ms	8540 KB	Output is correct
5	Correct	2 ms	8540 KB	Output is correct
6	Correct	2 ms	8540 KB	Output is correct
7	Correct	2 ms	8540 KB	Output is correct
8	Correct	2 ms	8624 KB	Output is correct
9	Correct	3 ms	8540 KB	Output is correct
10	Correct	2 ms	8540 KB	Output is correct

Subtask #2
7.0 / 7.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	2 ms	8536 KB	Output is correct
2	Correct	3 ms	8540 KB	Output is correct
3	Correct	3 ms	8612 KB	Output is correct
4	Correct	3 ms	8540 KB	Output is correct
5	Correct	2 ms	8540 KB	Output is correct
6	Correct	2 ms	8540 KB	Output is correct
7	Correct	2 ms	8540 KB	Output is correct
8	Correct	2 ms	8624 KB	Output is correct
9	Correct	3 ms	8540 KB	Output is correct
10	Correct	2 ms	8540 KB	Output is correct
11	Correct	2 ms	8536 KB	Output is correct
12	Correct	2 ms	8540 KB	Output is correct
13	Correct	2 ms	8608 KB	Output is correct
14	Correct	2 ms	8540 KB	Output is correct
15	Correct	2 ms	8620 KB	Output is correct
16	Correct	2 ms	8540 KB	Output is correct
17	Correct	2 ms	8536 KB	Output is correct

Subtask #3
7.0 / 7.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	2 ms	8536 KB	Output is correct
2	Correct	3 ms	8540 KB	Output is correct
3	Correct	3 ms	8612 KB	Output is correct
4	Correct	3 ms	8540 KB	Output is correct
5	Correct	2 ms	8540 KB	Output is correct
6	Correct	2 ms	8540 KB	Output is correct
7	Correct	2 ms	8540 KB	Output is correct
8	Correct	2 ms	8624 KB	Output is correct
9	Correct	3 ms	8540 KB	Output is correct
10	Correct	2 ms	8540 KB	Output is correct
11	Correct	2 ms	8536 KB	Output is correct
12	Correct	2 ms	8540 KB	Output is correct
13	Correct	2 ms	8608 KB	Output is correct
14	Correct	2 ms	8540 KB	Output is correct
15	Correct	2 ms	8620 KB	Output is correct
16	Correct	2 ms	8540 KB	Output is correct
17	Correct	2 ms	8536 KB	Output is correct
18	Correct	4 ms	9308 KB	Output is correct
19	Correct	5 ms	9656 KB	Output is correct
20	Correct	4 ms	9644 KB	Output is correct
21	Correct	4 ms	9308 KB	Output is correct
22	Correct	5 ms	9564 KB	Output is correct
23	Correct	4 ms	9304 KB	Output is correct
24	Correct	4 ms	9564 KB	Output is correct

Subtask #4
10.0 / 10.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	2 ms	8536 KB	Output is correct
2	Correct	3 ms	8540 KB	Output is correct
3	Correct	3 ms	8612 KB	Output is correct
4	Correct	3 ms	8540 KB	Output is correct
5	Correct	2 ms	8540 KB	Output is correct
6	Correct	2 ms	8540 KB	Output is correct
7	Correct	2 ms	8540 KB	Output is correct
8	Correct	2 ms	8624 KB	Output is correct
9	Correct	3 ms	8540 KB	Output is correct
10	Correct	2 ms	8540 KB	Output is correct
11	Correct	2 ms	8536 KB	Output is correct
12	Correct	2 ms	8540 KB	Output is correct
13	Correct	2 ms	8608 KB	Output is correct
14	Correct	2 ms	8540 KB	Output is correct
15	Correct	2 ms	8620 KB	Output is correct
16	Correct	2 ms	8540 KB	Output is correct
17	Correct	2 ms	8536 KB	Output is correct
18	Correct	4 ms	9308 KB	Output is correct
19	Correct	5 ms	9656 KB	Output is correct
20	Correct	4 ms	9644 KB	Output is correct
21	Correct	4 ms	9308 KB	Output is correct
22	Correct	5 ms	9564 KB	Output is correct
23	Correct	4 ms	9304 KB	Output is correct
24	Correct	4 ms	9564 KB	Output is correct
25	Correct	2 ms	8540 KB	Output is correct
26	Correct	4 ms	9468 KB	Output is correct
27	Correct	4 ms	9308 KB	Output is correct
28	Correct	4 ms	9308 KB	Output is correct
29	Correct	4 ms	9308 KB	Output is correct
30	Correct	5 ms	9052 KB	Output is correct
31	Correct	5 ms	9132 KB	Output is correct
32	Correct	4 ms	9212 KB	Output is correct
33	Correct	5 ms	9216 KB	Output is correct

Subtask #5
0 / 20.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	2 ms	8536 KB	Output is correct
2	Correct	3 ms	8540 KB	Output is correct
3	Correct	3 ms	8612 KB	Output is correct
4	Correct	3 ms	8540 KB	Output is correct
5	Correct	2 ms	8540 KB	Output is correct
6	Correct	2 ms	8540 KB	Output is correct
7	Correct	2 ms	8540 KB	Output is correct
8	Correct	2 ms	8624 KB	Output is correct
9	Correct	3 ms	8540 KB	Output is correct
10	Correct	2 ms	8540 KB	Output is correct
11	Correct	2 ms	8536 KB	Output is correct
12	Correct	2 ms	8540 KB	Output is correct
13	Correct	2 ms	8608 KB	Output is correct
14	Correct	2 ms	8540 KB	Output is correct
15	Correct	2 ms	8620 KB	Output is correct
16	Correct	2 ms	8540 KB	Output is correct
17	Correct	2 ms	8536 KB	Output is correct
18	Correct	4 ms	9308 KB	Output is correct
19	Correct	5 ms	9656 KB	Output is correct
20	Correct	4 ms	9644 KB	Output is correct
21	Correct	4 ms	9308 KB	Output is correct
22	Correct	5 ms	9564 KB	Output is correct
23	Correct	4 ms	9304 KB	Output is correct
24	Correct	4 ms	9564 KB	Output is correct
25	Incorrect	95 ms	41728 KB	Output isn't correct
26	Halted	0 ms	0 KB	-

Subtask #6
23.0 / 23.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	2 ms	8536 KB	Output is correct
2	Correct	3 ms	8540 KB	Output is correct
3	Correct	295 ms	33848 KB	Output is correct
4	Correct	310 ms	33872 KB	Output is correct
5	Correct	249 ms	33704 KB	Output is correct

Subtask #7
0 / 26.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	2 ms	8536 KB	Output is correct
2	Correct	3 ms	8540 KB	Output is correct
3	Correct	3 ms	8612 KB	Output is correct
4	Correct	3 ms	8540 KB	Output is correct
5	Correct	2 ms	8540 KB	Output is correct
6	Correct	2 ms	8540 KB	Output is correct
7	Correct	2 ms	8540 KB	Output is correct
8	Correct	2 ms	8624 KB	Output is correct
9	Correct	3 ms	8540 KB	Output is correct
10	Correct	2 ms	8540 KB	Output is correct
11	Correct	2 ms	8536 KB	Output is correct
12	Correct	2 ms	8540 KB	Output is correct
13	Correct	2 ms	8608 KB	Output is correct
14	Correct	2 ms	8540 KB	Output is correct
15	Correct	2 ms	8620 KB	Output is correct
16	Correct	2 ms	8540 KB	Output is correct
17	Correct	2 ms	8536 KB	Output is correct
18	Correct	4 ms	9308 KB	Output is correct
19	Correct	5 ms	9656 KB	Output is correct
20	Correct	4 ms	9644 KB	Output is correct
21	Correct	4 ms	9308 KB	Output is correct
22	Correct	5 ms	9564 KB	Output is correct
23	Correct	4 ms	9304 KB	Output is correct
24	Correct	4 ms	9564 KB	Output is correct
25	Correct	2 ms	8540 KB	Output is correct
26	Correct	4 ms	9468 KB	Output is correct
27	Correct	4 ms	9308 KB	Output is correct
28	Correct	4 ms	9308 KB	Output is correct
29	Correct	4 ms	9308 KB	Output is correct
30	Correct	5 ms	9052 KB	Output is correct
31	Correct	5 ms	9132 KB	Output is correct
32	Correct	4 ms	9212 KB	Output is correct
33	Correct	5 ms	9216 KB	Output is correct
34	Incorrect	95 ms	41728 KB	Output isn't correct
35	Halted	0 ms	0 KB	-

Submission #938817

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