답안 #895150

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
895150	2023-12-29T13:39:02 Z	hmm789	Cat Exercise (JOI23_ho_t4)	C++14	100 / 100	218 ms	58968 KB

Main

#include <bits/stdc++.h>
using namespace std;
#define int long long
#define INF 1000000000000000000
#define MOD 998244353

vector<int> adj[200000];
int p[200000][18], depth[200000], dp[200000], pa[200000];

int root(int x) {
    if(pa[x] == x) return x;
    else return pa[x] = root(pa[x]);
}

void merge(int x, int y) {
    x = root(x); y = root(y);
    if(x == y) return;
    if(x > y) swap(x, y);
    pa[x] = y;
}

void dfs(int x, int par, int d) {
    depth[x] = d;
    p[x][0] = par;
    for(int i = 1; i < 18; i++) {
        if(p[x][i-1] == -1) break;
        p[x][i] = p[p[x][i-1]][i-1];
    }
    for(int i : adj[x]) if(i != par) dfs(i, x, d+1);
}

int lca(int x, int y) {
    if(depth[x] < depth[y]) swap(x, y);
    int h = depth[x]-depth[y];
    for(int i = 0; i < 18; i++) {
        if(h&(1<<i)) x = p[x][i];
    }
    if(x == y) return x;
    for(int i = 17; i >= 0; i--) {
        if(p[x][i] != p[y][i]) {
            x = p[x][i]; y = p[y][i];
        }
    }
    return p[x][0];
}

int dist(int x, int y) {
    return depth[x]+depth[y]-2*depth[lca(x, y)];
}

int32_t main() {
    ios_base::sync_with_stdio(0);
    cin.tie(0); cout.tie(0);
    int n, x, y;
    cin >> n;
    int p[n];
    for(int i = 0; i < n; i++) {
        cin >> p[i];
        p[i]--;
    }
    for(int i = 0; i < n-1; i++) {
        cin >> x >> y;
        x--; y--;
        adj[p[x]].push_back(p[y]);
        adj[p[y]].push_back(p[x]);
    }
    memset(p, -1, sizeof(p));
    for(int i = 0; i < n; i++) pa[i] = i;
    dfs(0, -1, 0);
    for(int i = 0; i < n; i++) {
        for(int j : adj[i]) if(j < i) {
            int rt = root(j);
            dp[i] = max(dp[i], dp[rt]+dist(rt, i));
            merge(i, j);
        }
    }
    cout << dp[n-1];
}

Subtask #1
7.0 / 7.0

#	결과	실행 시간	메모리	Grader output
1	Correct	2 ms	11096 KB	Output is correct
2	Correct	2 ms	11100 KB	Output is correct
3	Correct	3 ms	11100 KB	Output is correct
4	Correct	2 ms	11172 KB	Output is correct
5	Correct	2 ms	11172 KB	Output is correct
6	Correct	2 ms	11100 KB	Output is correct
7	Correct	2 ms	11100 KB	Output is correct
8	Correct	2 ms	11100 KB	Output is correct
9	Correct	2 ms	11100 KB	Output is correct
10	Correct	2 ms	11164 KB	Output is correct

Subtask #2
7.0 / 7.0

#	결과	실행 시간	메모리	Grader output
1	Correct	2 ms	11096 KB	Output is correct
2	Correct	2 ms	11100 KB	Output is correct
3	Correct	3 ms	11100 KB	Output is correct
4	Correct	2 ms	11172 KB	Output is correct
5	Correct	2 ms	11172 KB	Output is correct
6	Correct	2 ms	11100 KB	Output is correct
7	Correct	2 ms	11100 KB	Output is correct
8	Correct	2 ms	11100 KB	Output is correct
9	Correct	2 ms	11100 KB	Output is correct
10	Correct	2 ms	11164 KB	Output is correct
11	Correct	3 ms	11096 KB	Output is correct
12	Correct	2 ms	11100 KB	Output is correct
13	Correct	2 ms	11100 KB	Output is correct
14	Correct	2 ms	11096 KB	Output is correct
15	Correct	2 ms	11100 KB	Output is correct
16	Correct	2 ms	11096 KB	Output is correct
17	Correct	2 ms	11100 KB	Output is correct

Subtask #3
7.0 / 7.0

#	결과	실행 시간	메모리	Grader output
1	Correct	2 ms	11096 KB	Output is correct
2	Correct	2 ms	11100 KB	Output is correct
3	Correct	3 ms	11100 KB	Output is correct
4	Correct	2 ms	11172 KB	Output is correct
5	Correct	2 ms	11172 KB	Output is correct
6	Correct	2 ms	11100 KB	Output is correct
7	Correct	2 ms	11100 KB	Output is correct
8	Correct	2 ms	11100 KB	Output is correct
9	Correct	2 ms	11100 KB	Output is correct
10	Correct	2 ms	11164 KB	Output is correct
11	Correct	3 ms	11096 KB	Output is correct
12	Correct	2 ms	11100 KB	Output is correct
13	Correct	2 ms	11100 KB	Output is correct
14	Correct	2 ms	11096 KB	Output is correct
15	Correct	2 ms	11100 KB	Output is correct
16	Correct	2 ms	11096 KB	Output is correct
17	Correct	2 ms	11100 KB	Output is correct
18	Correct	4 ms	11612 KB	Output is correct
19	Correct	4 ms	11700 KB	Output is correct
20	Correct	5 ms	11612 KB	Output is correct
21	Correct	4 ms	11612 KB	Output is correct
22	Correct	4 ms	11612 KB	Output is correct
23	Correct	4 ms	11864 KB	Output is correct
24	Correct	4 ms	11612 KB	Output is correct

Subtask #4
10.0 / 10.0

#	결과	실행 시간	메모리	Grader output
1	Correct	2 ms	11096 KB	Output is correct
2	Correct	2 ms	11100 KB	Output is correct
3	Correct	3 ms	11100 KB	Output is correct
4	Correct	2 ms	11172 KB	Output is correct
5	Correct	2 ms	11172 KB	Output is correct
6	Correct	2 ms	11100 KB	Output is correct
7	Correct	2 ms	11100 KB	Output is correct
8	Correct	2 ms	11100 KB	Output is correct
9	Correct	2 ms	11100 KB	Output is correct
10	Correct	2 ms	11164 KB	Output is correct
11	Correct	3 ms	11096 KB	Output is correct
12	Correct	2 ms	11100 KB	Output is correct
13	Correct	2 ms	11100 KB	Output is correct
14	Correct	2 ms	11096 KB	Output is correct
15	Correct	2 ms	11100 KB	Output is correct
16	Correct	2 ms	11096 KB	Output is correct
17	Correct	2 ms	11100 KB	Output is correct
18	Correct	4 ms	11612 KB	Output is correct
19	Correct	4 ms	11700 KB	Output is correct
20	Correct	5 ms	11612 KB	Output is correct
21	Correct	4 ms	11612 KB	Output is correct
22	Correct	4 ms	11612 KB	Output is correct
23	Correct	4 ms	11864 KB	Output is correct
24	Correct	4 ms	11612 KB	Output is correct
25	Correct	2 ms	11100 KB	Output is correct
26	Correct	4 ms	11612 KB	Output is correct
27	Correct	4 ms	11696 KB	Output is correct
28	Correct	4 ms	11700 KB	Output is correct
29	Correct	4 ms	11624 KB	Output is correct
30	Correct	4 ms	11368 KB	Output is correct
31	Correct	4 ms	11368 KB	Output is correct
32	Correct	5 ms	11368 KB	Output is correct
33	Correct	4 ms	11368 KB	Output is correct

Subtask #5
20.0 / 20.0

#	결과	실행 시간	메모리	Grader output
1	Correct	2 ms	11096 KB	Output is correct
2	Correct	2 ms	11100 KB	Output is correct
3	Correct	3 ms	11100 KB	Output is correct
4	Correct	2 ms	11172 KB	Output is correct
5	Correct	2 ms	11172 KB	Output is correct
6	Correct	2 ms	11100 KB	Output is correct
7	Correct	2 ms	11100 KB	Output is correct
8	Correct	2 ms	11100 KB	Output is correct
9	Correct	2 ms	11100 KB	Output is correct
10	Correct	2 ms	11164 KB	Output is correct
11	Correct	3 ms	11096 KB	Output is correct
12	Correct	2 ms	11100 KB	Output is correct
13	Correct	2 ms	11100 KB	Output is correct
14	Correct	2 ms	11096 KB	Output is correct
15	Correct	2 ms	11100 KB	Output is correct
16	Correct	2 ms	11096 KB	Output is correct
17	Correct	2 ms	11100 KB	Output is correct
18	Correct	4 ms	11612 KB	Output is correct
19	Correct	4 ms	11700 KB	Output is correct
20	Correct	5 ms	11612 KB	Output is correct
21	Correct	4 ms	11612 KB	Output is correct
22	Correct	4 ms	11612 KB	Output is correct
23	Correct	4 ms	11864 KB	Output is correct
24	Correct	4 ms	11612 KB	Output is correct
25	Correct	131 ms	54112 KB	Output is correct
26	Correct	113 ms	58968 KB	Output is correct
27	Correct	99 ms	58924 KB	Output is correct
28	Correct	170 ms	58356 KB	Output is correct
29	Correct	172 ms	54408 KB	Output is correct
30	Correct	167 ms	57168 KB	Output is correct
31	Correct	174 ms	56656 KB	Output is correct

Subtask #6
23.0 / 23.0

#	결과	실행 시간	메모리	Grader output
1	Correct	2 ms	11096 KB	Output is correct
2	Correct	2 ms	11100 KB	Output is correct
3	Correct	170 ms	51284 KB	Output is correct
4	Correct	159 ms	51064 KB	Output is correct
5	Correct	162 ms	51024 KB	Output is correct

Subtask #7
26.0 / 26.0

#	결과	실행 시간	메모리	Grader output
1	Correct	2 ms	11096 KB	Output is correct
2	Correct	2 ms	11100 KB	Output is correct
3	Correct	3 ms	11100 KB	Output is correct
4	Correct	2 ms	11172 KB	Output is correct
5	Correct	2 ms	11172 KB	Output is correct
6	Correct	2 ms	11100 KB	Output is correct
7	Correct	2 ms	11100 KB	Output is correct
8	Correct	2 ms	11100 KB	Output is correct
9	Correct	2 ms	11100 KB	Output is correct
10	Correct	2 ms	11164 KB	Output is correct
11	Correct	3 ms	11096 KB	Output is correct
12	Correct	2 ms	11100 KB	Output is correct
13	Correct	2 ms	11100 KB	Output is correct
14	Correct	2 ms	11096 KB	Output is correct
15	Correct	2 ms	11100 KB	Output is correct
16	Correct	2 ms	11096 KB	Output is correct
17	Correct	2 ms	11100 KB	Output is correct
18	Correct	4 ms	11612 KB	Output is correct
19	Correct	4 ms	11700 KB	Output is correct
20	Correct	5 ms	11612 KB	Output is correct
21	Correct	4 ms	11612 KB	Output is correct
22	Correct	4 ms	11612 KB	Output is correct
23	Correct	4 ms	11864 KB	Output is correct
24	Correct	4 ms	11612 KB	Output is correct
25	Correct	2 ms	11100 KB	Output is correct
26	Correct	4 ms	11612 KB	Output is correct
27	Correct	4 ms	11696 KB	Output is correct
28	Correct	4 ms	11700 KB	Output is correct
29	Correct	4 ms	11624 KB	Output is correct
30	Correct	4 ms	11368 KB	Output is correct
31	Correct	4 ms	11368 KB	Output is correct
32	Correct	5 ms	11368 KB	Output is correct
33	Correct	4 ms	11368 KB	Output is correct
34	Correct	131 ms	54112 KB	Output is correct
35	Correct	113 ms	58968 KB	Output is correct
36	Correct	99 ms	58924 KB	Output is correct
37	Correct	170 ms	58356 KB	Output is correct
38	Correct	172 ms	54408 KB	Output is correct
39	Correct	167 ms	57168 KB	Output is correct
40	Correct	174 ms	56656 KB	Output is correct
41	Correct	2 ms	11096 KB	Output is correct
42	Correct	2 ms	11100 KB	Output is correct
43	Correct	170 ms	51284 KB	Output is correct
44	Correct	159 ms	51064 KB	Output is correct
45	Correct	162 ms	51024 KB	Output is correct
46	Correct	149 ms	56648 KB	Output is correct
47	Correct	135 ms	56656 KB	Output is correct
48	Correct	133 ms	56660 KB	Output is correct
49	Correct	132 ms	56584 KB	Output is correct
50	Correct	196 ms	50660 KB	Output is correct
51	Correct	218 ms	50436 KB	Output is correct
52	Correct	197 ms	50692 KB	Output is correct
53	Correct	209 ms	50508 KB	Output is correct

답안 #895150

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