답안 #1049588

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1049588	2024-08-09T00:17:26 Z	ymm	Cat Exercise (JOI23_ho_t4)	C++17	100 / 100	127 ms	55640 KB

Main

#include <bits/stdc++.h>
#define Loop(x,l,r) for (ll x = (l); x < (ll)(r); ++x)
#define LoopR(x,l,r) for (ll x = (r)-1; x >= (ll)(l); --x)
typedef long long ll;
typedef std::pair<int, int> pii;
typedef std::pair<ll , ll > pll;
using namespace std;

const int N = 200'010;
const int lg = 20;
vector<int> A[N];
int val[N];
int anc[N][lg];
int height[N];

void dfs1(int v, int p, int h)
{
	anc[v][0] = p;
	Loop (i,0,lg-1)
		anc[v][i+1] = anc[anc[v][i]][i];
	height[v] = h;
	for (int u : A[v])
		if (u != p)
			dfs1(u, v, h+1);
}

int lca(int v, int u)
{
	if (height[v] < height[u])
		swap(v, u);
	int diff = height[v] - height[u];
	Loop (i,0,lg)
		if ((diff>>i)&1)
			v = anc[v][i];
	if (v == u)
		return v;
	LoopR (i,0,lg) {
		if (anc[v][i] != anc[u][i]) {
			v = anc[v][i];
			u = anc[u][i];
		}
	}
	return anc[v][0];
}

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

namespace dsu {
	int par[N];
	int p2[N];

	void init(int n) {
		fill(par, par+n, -1);
		fill(p2, p2+n, -1);
	}

	int rt(int v) { return p2[v] == -1? v: (p2[v] = rt(p2[v])); }

	void unite(int v, int u) {
		v = rt(v);
		u = rt(u);
		par[u] = v;
		p2[u] = v;
	}
}

vector<int> A2[N];
ll ans;

void dfs(int v, ll h)
{
	ans = max(ans, h);
	for (int u : A2[v])
		dfs(u, h + dis(v, u));
}

int main()
{
	cin.tie(0) -> sync_with_stdio(false);
	int n;
	cin >> n;
	Loop (i,0,n)
		cin >> val[i];
	Loop (i,1,n) {
		int v, u;
		cin >> v >> u;
		v = val[v-1]-1;
		u = val[u-1]-1;
		A[v].push_back(u);
		A[u].push_back(v);
	}
	dfs1(0, 0, 0);
	dsu::init(n);
	Loop (v,0,n) {
		for (int u : A[v]) {
			if (v > u)
				dsu::unite(v, u);
		}
	}
	int rt = -1;
	Loop (i,0,n) {
		if (dsu::par[i] == -1)
			rt = i;
		else
			A2[dsu::par[i]].push_back(i);
	}
	dfs(rt, 0);
	cout << ans << '\n';
}

Subtask #1
7.0 / 7.0

#	결과	실행 시간	메모리	Grader output
1	Correct	2 ms	16216 KB	Output is correct
2	Correct	2 ms	16216 KB	Output is correct
3	Correct	2 ms	16220 KB	Output is correct
4	Correct	2 ms	16220 KB	Output is correct
5	Correct	2 ms	16220 KB	Output is correct
6	Correct	2 ms	16220 KB	Output is correct
7	Correct	2 ms	16220 KB	Output is correct
8	Correct	2 ms	16216 KB	Output is correct
9	Correct	2 ms	16220 KB	Output is correct
10	Correct	3 ms	16216 KB	Output is correct

Subtask #2
7.0 / 7.0

#	결과	실행 시간	메모리	Grader output
1	Correct	2 ms	16216 KB	Output is correct
2	Correct	2 ms	16216 KB	Output is correct
3	Correct	2 ms	16220 KB	Output is correct
4	Correct	2 ms	16220 KB	Output is correct
5	Correct	2 ms	16220 KB	Output is correct
6	Correct	2 ms	16220 KB	Output is correct
7	Correct	2 ms	16220 KB	Output is correct
8	Correct	2 ms	16216 KB	Output is correct
9	Correct	2 ms	16220 KB	Output is correct
10	Correct	3 ms	16216 KB	Output is correct
11	Correct	2 ms	16220 KB	Output is correct
12	Correct	2 ms	16220 KB	Output is correct
13	Correct	2 ms	16220 KB	Output is correct
14	Correct	2 ms	16344 KB	Output is correct
15	Correct	2 ms	16220 KB	Output is correct
16	Correct	2 ms	16220 KB	Output is correct
17	Correct	2 ms	16220 KB	Output is correct

Subtask #3
7.0 / 7.0

#	결과	실행 시간	메모리	Grader output
1	Correct	2 ms	16216 KB	Output is correct
2	Correct	2 ms	16216 KB	Output is correct
3	Correct	2 ms	16220 KB	Output is correct
4	Correct	2 ms	16220 KB	Output is correct
5	Correct	2 ms	16220 KB	Output is correct
6	Correct	2 ms	16220 KB	Output is correct
7	Correct	2 ms	16220 KB	Output is correct
8	Correct	2 ms	16216 KB	Output is correct
9	Correct	2 ms	16220 KB	Output is correct
10	Correct	3 ms	16216 KB	Output is correct
11	Correct	2 ms	16220 KB	Output is correct
12	Correct	2 ms	16220 KB	Output is correct
13	Correct	2 ms	16220 KB	Output is correct
14	Correct	2 ms	16344 KB	Output is correct
15	Correct	2 ms	16220 KB	Output is correct
16	Correct	2 ms	16220 KB	Output is correct
17	Correct	2 ms	16220 KB	Output is correct
18	Correct	5 ms	16732 KB	Output is correct
19	Correct	3 ms	16732 KB	Output is correct
20	Correct	4 ms	16728 KB	Output is correct
21	Correct	3 ms	16476 KB	Output is correct
22	Correct	3 ms	16556 KB	Output is correct
23	Correct	4 ms	16732 KB	Output is correct
24	Correct	4 ms	16732 KB	Output is correct

Subtask #4
10.0 / 10.0

#	결과	실행 시간	메모리	Grader output
1	Correct	2 ms	16216 KB	Output is correct
2	Correct	2 ms	16216 KB	Output is correct
3	Correct	2 ms	16220 KB	Output is correct
4	Correct	2 ms	16220 KB	Output is correct
5	Correct	2 ms	16220 KB	Output is correct
6	Correct	2 ms	16220 KB	Output is correct
7	Correct	2 ms	16220 KB	Output is correct
8	Correct	2 ms	16216 KB	Output is correct
9	Correct	2 ms	16220 KB	Output is correct
10	Correct	3 ms	16216 KB	Output is correct
11	Correct	2 ms	16220 KB	Output is correct
12	Correct	2 ms	16220 KB	Output is correct
13	Correct	2 ms	16220 KB	Output is correct
14	Correct	2 ms	16344 KB	Output is correct
15	Correct	2 ms	16220 KB	Output is correct
16	Correct	2 ms	16220 KB	Output is correct
17	Correct	2 ms	16220 KB	Output is correct
18	Correct	5 ms	16732 KB	Output is correct
19	Correct	3 ms	16732 KB	Output is correct
20	Correct	4 ms	16728 KB	Output is correct
21	Correct	3 ms	16476 KB	Output is correct
22	Correct	3 ms	16556 KB	Output is correct
23	Correct	4 ms	16732 KB	Output is correct
24	Correct	4 ms	16732 KB	Output is correct
25	Correct	2 ms	16220 KB	Output is correct
26	Correct	4 ms	16732 KB	Output is correct
27	Correct	3 ms	16732 KB	Output is correct
28	Correct	3 ms	16828 KB	Output is correct
29	Correct	4 ms	16732 KB	Output is correct
30	Correct	4 ms	16476 KB	Output is correct
31	Correct	4 ms	16476 KB	Output is correct
32	Correct	4 ms	16476 KB	Output is correct
33	Correct	3 ms	16476 KB	Output is correct

Subtask #5
20.0 / 20.0

#	결과	실행 시간	메모리	Grader output
1	Correct	2 ms	16216 KB	Output is correct
2	Correct	2 ms	16216 KB	Output is correct
3	Correct	2 ms	16220 KB	Output is correct
4	Correct	2 ms	16220 KB	Output is correct
5	Correct	2 ms	16220 KB	Output is correct
6	Correct	2 ms	16220 KB	Output is correct
7	Correct	2 ms	16220 KB	Output is correct
8	Correct	2 ms	16216 KB	Output is correct
9	Correct	2 ms	16220 KB	Output is correct
10	Correct	3 ms	16216 KB	Output is correct
11	Correct	2 ms	16220 KB	Output is correct
12	Correct	2 ms	16220 KB	Output is correct
13	Correct	2 ms	16220 KB	Output is correct
14	Correct	2 ms	16344 KB	Output is correct
15	Correct	2 ms	16220 KB	Output is correct
16	Correct	2 ms	16220 KB	Output is correct
17	Correct	2 ms	16220 KB	Output is correct
18	Correct	5 ms	16732 KB	Output is correct
19	Correct	3 ms	16732 KB	Output is correct
20	Correct	4 ms	16728 KB	Output is correct
21	Correct	3 ms	16476 KB	Output is correct
22	Correct	3 ms	16556 KB	Output is correct
23	Correct	4 ms	16732 KB	Output is correct
24	Correct	4 ms	16732 KB	Output is correct
25	Correct	71 ms	53588 KB	Output is correct
26	Correct	91 ms	55636 KB	Output is correct
27	Correct	82 ms	55640 KB	Output is correct
28	Correct	91 ms	51540 KB	Output is correct
29	Correct	90 ms	47440 KB	Output is correct
30	Correct	91 ms	50512 KB	Output is correct
31	Correct	86 ms	49488 KB	Output is correct

Subtask #6
23.0 / 23.0

#	결과	실행 시간	메모리	Grader output
1	Correct	2 ms	16220 KB	Output is correct
2	Correct	2 ms	16220 KB	Output is correct
3	Correct	84 ms	39660 KB	Output is correct
4	Correct	81 ms	39764 KB	Output is correct
5	Correct	95 ms	39472 KB	Output is correct

Subtask #7
26.0 / 26.0

#	결과	실행 시간	메모리	Grader output
1	Correct	2 ms	16216 KB	Output is correct
2	Correct	2 ms	16216 KB	Output is correct
3	Correct	2 ms	16220 KB	Output is correct
4	Correct	2 ms	16220 KB	Output is correct
5	Correct	2 ms	16220 KB	Output is correct
6	Correct	2 ms	16220 KB	Output is correct
7	Correct	2 ms	16220 KB	Output is correct
8	Correct	2 ms	16216 KB	Output is correct
9	Correct	2 ms	16220 KB	Output is correct
10	Correct	3 ms	16216 KB	Output is correct
11	Correct	2 ms	16220 KB	Output is correct
12	Correct	2 ms	16220 KB	Output is correct
13	Correct	2 ms	16220 KB	Output is correct
14	Correct	2 ms	16344 KB	Output is correct
15	Correct	2 ms	16220 KB	Output is correct
16	Correct	2 ms	16220 KB	Output is correct
17	Correct	2 ms	16220 KB	Output is correct
18	Correct	5 ms	16732 KB	Output is correct
19	Correct	3 ms	16732 KB	Output is correct
20	Correct	4 ms	16728 KB	Output is correct
21	Correct	3 ms	16476 KB	Output is correct
22	Correct	3 ms	16556 KB	Output is correct
23	Correct	4 ms	16732 KB	Output is correct
24	Correct	4 ms	16732 KB	Output is correct
25	Correct	2 ms	16220 KB	Output is correct
26	Correct	4 ms	16732 KB	Output is correct
27	Correct	3 ms	16732 KB	Output is correct
28	Correct	3 ms	16828 KB	Output is correct
29	Correct	4 ms	16732 KB	Output is correct
30	Correct	4 ms	16476 KB	Output is correct
31	Correct	4 ms	16476 KB	Output is correct
32	Correct	4 ms	16476 KB	Output is correct
33	Correct	3 ms	16476 KB	Output is correct
34	Correct	71 ms	53588 KB	Output is correct
35	Correct	91 ms	55636 KB	Output is correct
36	Correct	82 ms	55640 KB	Output is correct
37	Correct	91 ms	51540 KB	Output is correct
38	Correct	90 ms	47440 KB	Output is correct
39	Correct	91 ms	50512 KB	Output is correct
40	Correct	86 ms	49488 KB	Output is correct
41	Correct	2 ms	16220 KB	Output is correct
42	Correct	2 ms	16220 KB	Output is correct
43	Correct	84 ms	39660 KB	Output is correct
44	Correct	81 ms	39764 KB	Output is correct
45	Correct	95 ms	39472 KB	Output is correct
46	Correct	83 ms	52560 KB	Output is correct
47	Correct	86 ms	52640 KB	Output is correct
48	Correct	94 ms	52592 KB	Output is correct
49	Correct	82 ms	52492 KB	Output is correct
50	Correct	119 ms	42832 KB	Output is correct
51	Correct	106 ms	42836 KB	Output is correct
52	Correct	127 ms	42836 KB	Output is correct
53	Correct	99 ms	42836 KB	Output is correct

답안 #1049588

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