답안 #963140

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
963140	2024-04-14T15:03:12 Z	dorulean	Cat Exercise (JOI23_ho_t4)	C++17	100 / 100	369 ms	43088 KB

Main

#include <bits/stdc++.h>
using namespace std;
using ll = long long;
//#define int ll
using vi = vector<int>;
using pii = pair<int,int>;
using vpii = vector<pii>;
using vll = vector<ll>;
using vvi = vector<vector<int>>;
#define eb emplace_back

const int N = 2e5 + 5;
int a[N], ord[N], n, t[N], up[20][N], depth[N];
ll dp[N];
vi g[N];
pii best[N];
bool active[N];


void dfs(int u, int parent) {
 		up[0][u] = parent;
 		depth[u] = depth[parent] + 1;
 		for (auto v : g[u])
 			if (v != parent)
 				dfs(v, u);
 	};
int lca(int u, int v) {	
		if (depth[u] < depth[v])
			swap(u, v);
 		for (int p = 19; p >= 0; --p)
 			if (up[p][u] && depth[up[p][u]] >= depth[v])
 				u = up[p][u];
 		if (u == v) return u;
 		for (int p = 19; p >= 0; --p)
 			if (up[p][u] != up[p][v])
 				u = up[p][u], v = up[p][v];
 		return up[0][u];
 	};
int dist(int u, int v) {
 		return depth[u] + depth[v] - 2 * depth[lca(u, v)];
 	};
int find(int u) {
 		return (u == t[u] ? u : (t[u] = find(t[u])));
 	};
 void join(int u, int v) {
 		int ru = find(u), rv = find(v);
 		t[ru] = rv;
 		best[rv] = max(best[rv], best[ru]);
 	};

int32_t main() {
	ios_base::sync_with_stdio(false);
	cin.tie(nullptr);
	cout.tie(nullptr);

 	cin >> n;
 	for (int i = 1; i <= n; ++i)
 		cin >> a[i], ord[i] = i;
 	for (int u, v, i = 1; i < n; ++i) {
 		cin >> u >> v;
 		g[u].eb(v);
 		g[v].eb(u);
 	}
 	sort(ord + 1, ord + n + 1, [&](const int& i, const int& j) {return a[i] < a[j];});
 	
 	
 	
 	dfs(1, 0);
 	for (int p = 1; p < 20; ++p)
 		for (int i = 1; i <= n; ++i)
 			up[p][i] = up[p - 1][up[p - 1][i]];
 	
 	for (int i = 1; i <= n; ++i) {
 		int u = ord[i];
 		t[u] = u, best[u] = {a[u], u};
 		active[u] = true;
 		for (auto v : g[u]) {
 			if (active[v]) {
 				int mx = best[find(v)].second;
 				dp[u] = max(dp[u], dp[mx] + dist(u, mx));
 				join(u, v);
 			}
 		}
 	}

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

Subtask #1
7.0 / 7.0

#	결과	실행 시간	메모리	Grader output
1	Correct	6 ms	25080 KB	Output is correct
2	Correct	4 ms	25008 KB	Output is correct
3	Correct	4 ms	24924 KB	Output is correct
4	Correct	4 ms	24924 KB	Output is correct
5	Correct	3 ms	24924 KB	Output is correct
6	Correct	4 ms	24924 KB	Output is correct
7	Correct	4 ms	24924 KB	Output is correct
8	Correct	4 ms	24920 KB	Output is correct
9	Correct	4 ms	24924 KB	Output is correct
10	Correct	4 ms	24920 KB	Output is correct

Subtask #2
7.0 / 7.0

#	결과	실행 시간	메모리	Grader output
1	Correct	6 ms	25080 KB	Output is correct
2	Correct	4 ms	25008 KB	Output is correct
3	Correct	4 ms	24924 KB	Output is correct
4	Correct	4 ms	24924 KB	Output is correct
5	Correct	3 ms	24924 KB	Output is correct
6	Correct	4 ms	24924 KB	Output is correct
7	Correct	4 ms	24924 KB	Output is correct
8	Correct	4 ms	24920 KB	Output is correct
9	Correct	4 ms	24924 KB	Output is correct
10	Correct	4 ms	24920 KB	Output is correct
11	Correct	4 ms	25104 KB	Output is correct
12	Correct	4 ms	24924 KB	Output is correct
13	Correct	4 ms	25020 KB	Output is correct
14	Correct	4 ms	24924 KB	Output is correct
15	Correct	4 ms	24924 KB	Output is correct
16	Correct	4 ms	24920 KB	Output is correct
17	Correct	4 ms	24924 KB	Output is correct

Subtask #3
7.0 / 7.0

#	결과	실행 시간	메모리	Grader output
1	Correct	6 ms	25080 KB	Output is correct
2	Correct	4 ms	25008 KB	Output is correct
3	Correct	4 ms	24924 KB	Output is correct
4	Correct	4 ms	24924 KB	Output is correct
5	Correct	3 ms	24924 KB	Output is correct
6	Correct	4 ms	24924 KB	Output is correct
7	Correct	4 ms	24924 KB	Output is correct
8	Correct	4 ms	24920 KB	Output is correct
9	Correct	4 ms	24924 KB	Output is correct
10	Correct	4 ms	24920 KB	Output is correct
11	Correct	4 ms	25104 KB	Output is correct
12	Correct	4 ms	24924 KB	Output is correct
13	Correct	4 ms	25020 KB	Output is correct
14	Correct	4 ms	24924 KB	Output is correct
15	Correct	4 ms	24924 KB	Output is correct
16	Correct	4 ms	24920 KB	Output is correct
17	Correct	4 ms	24924 KB	Output is correct
18	Correct	6 ms	25436 KB	Output is correct
19	Correct	6 ms	25432 KB	Output is correct
20	Correct	6 ms	25676 KB	Output is correct
21	Correct	6 ms	25436 KB	Output is correct
22	Correct	8 ms	25436 KB	Output is correct
23	Correct	6 ms	25432 KB	Output is correct
24	Correct	6 ms	25436 KB	Output is correct

Subtask #4
10.0 / 10.0

#	결과	실행 시간	메모리	Grader output
1	Correct	6 ms	25080 KB	Output is correct
2	Correct	4 ms	25008 KB	Output is correct
3	Correct	4 ms	24924 KB	Output is correct
4	Correct	4 ms	24924 KB	Output is correct
5	Correct	3 ms	24924 KB	Output is correct
6	Correct	4 ms	24924 KB	Output is correct
7	Correct	4 ms	24924 KB	Output is correct
8	Correct	4 ms	24920 KB	Output is correct
9	Correct	4 ms	24924 KB	Output is correct
10	Correct	4 ms	24920 KB	Output is correct
11	Correct	4 ms	25104 KB	Output is correct
12	Correct	4 ms	24924 KB	Output is correct
13	Correct	4 ms	25020 KB	Output is correct
14	Correct	4 ms	24924 KB	Output is correct
15	Correct	4 ms	24924 KB	Output is correct
16	Correct	4 ms	24920 KB	Output is correct
17	Correct	4 ms	24924 KB	Output is correct
18	Correct	6 ms	25436 KB	Output is correct
19	Correct	6 ms	25432 KB	Output is correct
20	Correct	6 ms	25676 KB	Output is correct
21	Correct	6 ms	25436 KB	Output is correct
22	Correct	8 ms	25436 KB	Output is correct
23	Correct	6 ms	25432 KB	Output is correct
24	Correct	6 ms	25436 KB	Output is correct
25	Correct	4 ms	24924 KB	Output is correct
26	Correct	6 ms	25224 KB	Output is correct
27	Correct	7 ms	25176 KB	Output is correct
28	Correct	6 ms	25180 KB	Output is correct
29	Correct	6 ms	25432 KB	Output is correct
30	Correct	7 ms	25184 KB	Output is correct
31	Correct	6 ms	25180 KB	Output is correct
32	Correct	6 ms	25180 KB	Output is correct
33	Correct	6 ms	25180 KB	Output is correct

Subtask #5
20.0 / 20.0

#	결과	실행 시간	메모리	Grader output
1	Correct	6 ms	25080 KB	Output is correct
2	Correct	4 ms	25008 KB	Output is correct
3	Correct	4 ms	24924 KB	Output is correct
4	Correct	4 ms	24924 KB	Output is correct
5	Correct	3 ms	24924 KB	Output is correct
6	Correct	4 ms	24924 KB	Output is correct
7	Correct	4 ms	24924 KB	Output is correct
8	Correct	4 ms	24920 KB	Output is correct
9	Correct	4 ms	24924 KB	Output is correct
10	Correct	4 ms	24920 KB	Output is correct
11	Correct	4 ms	25104 KB	Output is correct
12	Correct	4 ms	24924 KB	Output is correct
13	Correct	4 ms	25020 KB	Output is correct
14	Correct	4 ms	24924 KB	Output is correct
15	Correct	4 ms	24924 KB	Output is correct
16	Correct	4 ms	24920 KB	Output is correct
17	Correct	4 ms	24924 KB	Output is correct
18	Correct	6 ms	25436 KB	Output is correct
19	Correct	6 ms	25432 KB	Output is correct
20	Correct	6 ms	25676 KB	Output is correct
21	Correct	6 ms	25436 KB	Output is correct
22	Correct	8 ms	25436 KB	Output is correct
23	Correct	6 ms	25432 KB	Output is correct
24	Correct	6 ms	25436 KB	Output is correct
25	Correct	101 ms	42656 KB	Output is correct
26	Correct	127 ms	42836 KB	Output is correct
27	Correct	119 ms	42696 KB	Output is correct
28	Correct	320 ms	43088 KB	Output is correct
29	Correct	311 ms	42900 KB	Output is correct
30	Correct	325 ms	42828 KB	Output is correct
31	Correct	324 ms	42904 KB	Output is correct

Subtask #6
23.0 / 23.0

#	결과	실행 시간	메모리	Grader output
1	Correct	4 ms	24932 KB	Output is correct
2	Correct	4 ms	24920 KB	Output is correct
3	Correct	210 ms	33512 KB	Output is correct
4	Correct	259 ms	33364 KB	Output is correct
5	Correct	209 ms	33620 KB	Output is correct

Subtask #7
26.0 / 26.0

#	결과	실행 시간	메모리	Grader output
1	Correct	6 ms	25080 KB	Output is correct
2	Correct	4 ms	25008 KB	Output is correct
3	Correct	4 ms	24924 KB	Output is correct
4	Correct	4 ms	24924 KB	Output is correct
5	Correct	3 ms	24924 KB	Output is correct
6	Correct	4 ms	24924 KB	Output is correct
7	Correct	4 ms	24924 KB	Output is correct
8	Correct	4 ms	24920 KB	Output is correct
9	Correct	4 ms	24924 KB	Output is correct
10	Correct	4 ms	24920 KB	Output is correct
11	Correct	4 ms	25104 KB	Output is correct
12	Correct	4 ms	24924 KB	Output is correct
13	Correct	4 ms	25020 KB	Output is correct
14	Correct	4 ms	24924 KB	Output is correct
15	Correct	4 ms	24924 KB	Output is correct
16	Correct	4 ms	24920 KB	Output is correct
17	Correct	4 ms	24924 KB	Output is correct
18	Correct	6 ms	25436 KB	Output is correct
19	Correct	6 ms	25432 KB	Output is correct
20	Correct	6 ms	25676 KB	Output is correct
21	Correct	6 ms	25436 KB	Output is correct
22	Correct	8 ms	25436 KB	Output is correct
23	Correct	6 ms	25432 KB	Output is correct
24	Correct	6 ms	25436 KB	Output is correct
25	Correct	4 ms	24924 KB	Output is correct
26	Correct	6 ms	25224 KB	Output is correct
27	Correct	7 ms	25176 KB	Output is correct
28	Correct	6 ms	25180 KB	Output is correct
29	Correct	6 ms	25432 KB	Output is correct
30	Correct	7 ms	25184 KB	Output is correct
31	Correct	6 ms	25180 KB	Output is correct
32	Correct	6 ms	25180 KB	Output is correct
33	Correct	6 ms	25180 KB	Output is correct
34	Correct	101 ms	42656 KB	Output is correct
35	Correct	127 ms	42836 KB	Output is correct
36	Correct	119 ms	42696 KB	Output is correct
37	Correct	320 ms	43088 KB	Output is correct
38	Correct	311 ms	42900 KB	Output is correct
39	Correct	325 ms	42828 KB	Output is correct
40	Correct	324 ms	42904 KB	Output is correct
41	Correct	4 ms	24932 KB	Output is correct
42	Correct	4 ms	24920 KB	Output is correct
43	Correct	210 ms	33512 KB	Output is correct
44	Correct	259 ms	33364 KB	Output is correct
45	Correct	209 ms	33620 KB	Output is correct
46	Correct	369 ms	38444 KB	Output is correct
47	Correct	359 ms	37972 KB	Output is correct
48	Correct	337 ms	39092 KB	Output is correct
49	Correct	368 ms	37872 KB	Output is correct
50	Correct	277 ms	33488 KB	Output is correct
51	Correct	289 ms	33616 KB	Output is correct
52	Correct	293 ms	33536 KB	Output is correct
53	Correct	281 ms	33608 KB	Output is correct

답안 #963140

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