답안 #1111865

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1111865	2024-11-13T08:15:18 Z	starchan	Cat Exercise (JOI23_ho_t4)	C++17	100 / 100	151 ms	63560 KB

Main

#include<bits/stdc++.h>
using namespace std;
#define int long long
#define in array<int, 2>
#define pb push_back
#define pob pop_back
#define fast() ios_base::sync_with_stdio(false); cin.tie(NULL)

const int MX = 2e5+5;
const int INF = 1e17;
const int LOGM = 18;

vector<int> adj[MX];

int par[LOGM][MX]; int dp[MX]; int dep[MX]; int tin[MX]; int tout[MX];

int T;

void dfs(int u, int p)
{
	tin[u] = ++T;
	par[0][u] = p;
	dep[u] = dep[p]+1;
	for(int v: adj[u])
	{
		if(v == p)
			continue;
		dfs(v, u);
	}
	tout[u] = T;
	return;
}

int dist(int u, int v)
{
	if(tin[u] > tin[v])
		swap(u, v);
	if(tout[u] >= tout[v])
		return dep[v]-dep[u];
	int s = u;
	for(int i = LOGM-1; i >= 0; i--)
	{
		if(tout[par[i][s]] < tout[v])
			s = par[i][s];
	}
	s = par[0][s];
	return dep[u]+dep[v]-2*dep[s];
}

vector<int> bst(MX);
vector<int> pa(MX, -1);

int leader(int u)
{
	if(pa[u] < 0)
		return u;
	return pa[u] = leader(pa[u]);
}

void merge(int u, int v)
{
	u = leader(u);
	v = leader(v);
	if(u == v)
		return;
	if(pa[u] < pa[v])
		swap(u, v);
	pa[v]+=pa[u];
	bst[v] = max(bst[v], bst[u]);
	pa[u] = v;
	return;
}

signed main()
{
	fast();
	int n; cin >> n;
	vector<int> p(n+1);
	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].pb(v); adj[v].pb(u);
	}
	par[0][0] = 0; dep[0] = 0; tout[0] = n+5;
	dfs(1, 0);
	for(int i = 1; i < LOGM; i++)
	{
		for(int u = 1; u <= n; u++)
			par[i][u] = par[i-1][par[i-1][u]];
	}
	for(int i = 1; i <= n; i++)
		bst[i] = i;
	for(int i = 1; i <= n; i++)
	{
		for(int j: adj[i])
		{
			if(j < i)
			{
				int w = bst[leader(j)];
				dp[i] = max(dp[i], dp[w]+dist(i, w));
				merge(i, j);
			}
		}
	}
	cout << dp[n] << "\n";
	return 0;
}

Subtask #1
7.0 / 7.0

#	결과	실행 시간	메모리	Grader output
1	Correct	8 ms	42320 KB	Output is correct
2	Correct	9 ms	42320 KB	Output is correct
3	Correct	8 ms	42320 KB	Output is correct
4	Correct	8 ms	42492 KB	Output is correct
5	Correct	8 ms	42320 KB	Output is correct
6	Correct	8 ms	42320 KB	Output is correct
7	Correct	8 ms	42320 KB	Output is correct
8	Correct	7 ms	42320 KB	Output is correct
9	Correct	8 ms	40272 KB	Output is correct
10	Correct	8 ms	38224 KB	Output is correct

Subtask #2
7.0 / 7.0

#	결과	실행 시간	메모리	Grader output
1	Correct	8 ms	42320 KB	Output is correct
2	Correct	9 ms	42320 KB	Output is correct
3	Correct	8 ms	42320 KB	Output is correct
4	Correct	8 ms	42492 KB	Output is correct
5	Correct	8 ms	42320 KB	Output is correct
6	Correct	8 ms	42320 KB	Output is correct
7	Correct	8 ms	42320 KB	Output is correct
8	Correct	7 ms	42320 KB	Output is correct
9	Correct	8 ms	40272 KB	Output is correct
10	Correct	8 ms	38224 KB	Output is correct
11	Correct	8 ms	36432 KB	Output is correct
12	Correct	8 ms	36368 KB	Output is correct
13	Correct	8 ms	42580 KB	Output is correct
14	Correct	8 ms	40448 KB	Output is correct
15	Correct	8 ms	38480 KB	Output is correct
16	Correct	8 ms	40528 KB	Output is correct
17	Correct	9 ms	40528 KB	Output is correct

Subtask #3
7.0 / 7.0

#	결과	실행 시간	메모리	Grader output
1	Correct	8 ms	42320 KB	Output is correct
2	Correct	9 ms	42320 KB	Output is correct
3	Correct	8 ms	42320 KB	Output is correct
4	Correct	8 ms	42492 KB	Output is correct
5	Correct	8 ms	42320 KB	Output is correct
6	Correct	8 ms	42320 KB	Output is correct
7	Correct	8 ms	42320 KB	Output is correct
8	Correct	7 ms	42320 KB	Output is correct
9	Correct	8 ms	40272 KB	Output is correct
10	Correct	8 ms	38224 KB	Output is correct
11	Correct	8 ms	36432 KB	Output is correct
12	Correct	8 ms	36368 KB	Output is correct
13	Correct	8 ms	42580 KB	Output is correct
14	Correct	8 ms	40448 KB	Output is correct
15	Correct	8 ms	38480 KB	Output is correct
16	Correct	8 ms	40528 KB	Output is correct
17	Correct	9 ms	40528 KB	Output is correct
18	Correct	11 ms	36944 KB	Output is correct
19	Correct	9 ms	35152 KB	Output is correct
20	Correct	9 ms	35152 KB	Output is correct
21	Correct	10 ms	40784 KB	Output is correct
22	Correct	10 ms	42832 KB	Output is correct
23	Correct	9 ms	42832 KB	Output is correct
24	Correct	9 ms	42832 KB	Output is correct

Subtask #4
10.0 / 10.0

#	결과	실행 시간	메모리	Grader output
1	Correct	8 ms	42320 KB	Output is correct
2	Correct	9 ms	42320 KB	Output is correct
3	Correct	8 ms	42320 KB	Output is correct
4	Correct	8 ms	42492 KB	Output is correct
5	Correct	8 ms	42320 KB	Output is correct
6	Correct	8 ms	42320 KB	Output is correct
7	Correct	8 ms	42320 KB	Output is correct
8	Correct	7 ms	42320 KB	Output is correct
9	Correct	8 ms	40272 KB	Output is correct
10	Correct	8 ms	38224 KB	Output is correct
11	Correct	8 ms	36432 KB	Output is correct
12	Correct	8 ms	36368 KB	Output is correct
13	Correct	8 ms	42580 KB	Output is correct
14	Correct	8 ms	40448 KB	Output is correct
15	Correct	8 ms	38480 KB	Output is correct
16	Correct	8 ms	40528 KB	Output is correct
17	Correct	9 ms	40528 KB	Output is correct
18	Correct	11 ms	36944 KB	Output is correct
19	Correct	9 ms	35152 KB	Output is correct
20	Correct	9 ms	35152 KB	Output is correct
21	Correct	10 ms	40784 KB	Output is correct
22	Correct	10 ms	42832 KB	Output is correct
23	Correct	9 ms	42832 KB	Output is correct
24	Correct	9 ms	42832 KB	Output is correct
25	Correct	7 ms	40272 KB	Output is correct
26	Correct	9 ms	41040 KB	Output is correct
27	Correct	9 ms	41040 KB	Output is correct
28	Correct	9 ms	42832 KB	Output is correct
29	Correct	9 ms	42832 KB	Output is correct
30	Correct	9 ms	43084 KB	Output is correct
31	Correct	9 ms	40784 KB	Output is correct
32	Correct	9 ms	42784 KB	Output is correct
33	Correct	9 ms	42832 KB	Output is correct

Subtask #5
20.0 / 20.0

#	결과	실행 시간	메모리	Grader output
1	Correct	8 ms	42320 KB	Output is correct
2	Correct	9 ms	42320 KB	Output is correct
3	Correct	8 ms	42320 KB	Output is correct
4	Correct	8 ms	42492 KB	Output is correct
5	Correct	8 ms	42320 KB	Output is correct
6	Correct	8 ms	42320 KB	Output is correct
7	Correct	8 ms	42320 KB	Output is correct
8	Correct	7 ms	42320 KB	Output is correct
9	Correct	8 ms	40272 KB	Output is correct
10	Correct	8 ms	38224 KB	Output is correct
11	Correct	8 ms	36432 KB	Output is correct
12	Correct	8 ms	36368 KB	Output is correct
13	Correct	8 ms	42580 KB	Output is correct
14	Correct	8 ms	40448 KB	Output is correct
15	Correct	8 ms	38480 KB	Output is correct
16	Correct	8 ms	40528 KB	Output is correct
17	Correct	9 ms	40528 KB	Output is correct
18	Correct	11 ms	36944 KB	Output is correct
19	Correct	9 ms	35152 KB	Output is correct
20	Correct	9 ms	35152 KB	Output is correct
21	Correct	10 ms	40784 KB	Output is correct
22	Correct	10 ms	42832 KB	Output is correct
23	Correct	9 ms	42832 KB	Output is correct
24	Correct	9 ms	42832 KB	Output is correct
25	Correct	74 ms	58864 KB	Output is correct
26	Correct	77 ms	63560 KB	Output is correct
27	Correct	70 ms	63560 KB	Output is correct
28	Correct	86 ms	63048 KB	Output is correct
29	Correct	92 ms	58952 KB	Output is correct
30	Correct	104 ms	62024 KB	Output is correct
31	Correct	98 ms	61000 KB	Output is correct

Subtask #6
23.0 / 23.0

#	결과	실행 시간	메모리	Grader output
1	Correct	10 ms	42320 KB	Output is correct
2	Correct	8 ms	42320 KB	Output is correct
3	Correct	104 ms	55744 KB	Output is correct
4	Correct	115 ms	55660 KB	Output is correct
5	Correct	106 ms	55624 KB	Output is correct

Subtask #7
26.0 / 26.0

#	결과	실행 시간	메모리	Grader output
1	Correct	8 ms	42320 KB	Output is correct
2	Correct	9 ms	42320 KB	Output is correct
3	Correct	8 ms	42320 KB	Output is correct
4	Correct	8 ms	42492 KB	Output is correct
5	Correct	8 ms	42320 KB	Output is correct
6	Correct	8 ms	42320 KB	Output is correct
7	Correct	8 ms	42320 KB	Output is correct
8	Correct	7 ms	42320 KB	Output is correct
9	Correct	8 ms	40272 KB	Output is correct
10	Correct	8 ms	38224 KB	Output is correct
11	Correct	8 ms	36432 KB	Output is correct
12	Correct	8 ms	36368 KB	Output is correct
13	Correct	8 ms	42580 KB	Output is correct
14	Correct	8 ms	40448 KB	Output is correct
15	Correct	8 ms	38480 KB	Output is correct
16	Correct	8 ms	40528 KB	Output is correct
17	Correct	9 ms	40528 KB	Output is correct
18	Correct	11 ms	36944 KB	Output is correct
19	Correct	9 ms	35152 KB	Output is correct
20	Correct	9 ms	35152 KB	Output is correct
21	Correct	10 ms	40784 KB	Output is correct
22	Correct	10 ms	42832 KB	Output is correct
23	Correct	9 ms	42832 KB	Output is correct
24	Correct	9 ms	42832 KB	Output is correct
25	Correct	7 ms	40272 KB	Output is correct
26	Correct	9 ms	41040 KB	Output is correct
27	Correct	9 ms	41040 KB	Output is correct
28	Correct	9 ms	42832 KB	Output is correct
29	Correct	9 ms	42832 KB	Output is correct
30	Correct	9 ms	43084 KB	Output is correct
31	Correct	9 ms	40784 KB	Output is correct
32	Correct	9 ms	42784 KB	Output is correct
33	Correct	9 ms	42832 KB	Output is correct
34	Correct	74 ms	58864 KB	Output is correct
35	Correct	77 ms	63560 KB	Output is correct
36	Correct	70 ms	63560 KB	Output is correct
37	Correct	86 ms	63048 KB	Output is correct
38	Correct	92 ms	58952 KB	Output is correct
39	Correct	104 ms	62024 KB	Output is correct
40	Correct	98 ms	61000 KB	Output is correct
41	Correct	10 ms	42320 KB	Output is correct
42	Correct	8 ms	42320 KB	Output is correct
43	Correct	104 ms	55744 KB	Output is correct
44	Correct	115 ms	55660 KB	Output is correct
45	Correct	106 ms	55624 KB	Output is correct
46	Correct	92 ms	61256 KB	Output is correct
47	Correct	99 ms	61188 KB	Output is correct
48	Correct	86 ms	61376 KB	Output is correct
49	Correct	88 ms	61256 KB	Output is correct
50	Correct	125 ms	55320 KB	Output is correct
51	Correct	139 ms	55112 KB	Output is correct
52	Correct	125 ms	55368 KB	Output is correct
53	Correct	151 ms	55112 KB	Output is correct

답안 #1111865

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 20.0 / 20.0

Subtask #6 23.0 / 23.0

Subtask #7 26.0 / 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
20.0 / 20.0

Subtask #6
23.0 / 23.0

Subtask #7
26.0 / 26.0