// ?
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef pair<int, int> pll;
#define all(x) (x).begin(),(x).end()
#define X first
#define Y second
#define sep ' '
#define endl '\n'
#define debug(x) cerr << #x << ": " << x << endl;
const ll MAXN = 1e5 + 10;
const ll LOG = 20;
int ans[MAXN], n, m, k, par[MAXN][LOG], delta[MAXN], F[MAXN], H[MAXN], tout[MAXN], T; // tin
vector<pll> adj[MAXN];
void dfs(int v, int p) {
H[v] = H[p] + 1;
par[v][0] = p;
for (pll e : adj[v])
if (e.X != p)
dfs(e.X, v);
tout[v] = T++;
}
inline int Par(int v, int k) {
for (int i = LOG - 1; i >= 0; i--)
if (k & (1 << i))
v = par[v][i];
return v;
}
inline int LCA(int v, int u) {
if (H[v] < H[u]) swap(v, u);
v = Par(v, H[v] - H[u]);
if (v == u) return v;
for (int i = LOG - 1; i >= 0; i--)
if (par[v][i] != par[u][i])
v = par[v][i], u = par[u][i];
return par[v][0];
}
void dfs2(int v, int p, int ind) {
F[v] += delta[v];
for (pll e : adj[v]) {
if (e.X != p) {
dfs2(e.X, v, e.Y);
F[v] += F[e.X];
}
}
ans[ind] = F[v] / 2;
}
int main() {
ios_base::sync_with_stdio(false); cin.tie(0); cout.tie(0);
cin >> n >> m >> k;
for (int i = 1; i < n; i++) {
int v, u;
cin >> v >> u;
adj[u].push_back({v, i});
adj[v].push_back({u, i});
}
dfs(1, 0);
for (int i = 1; i < LOG; i++)
for (int v = 1; v <= n; v++)
par[v][i] = par[par[v][i - 1]][i - 1];
for (int i = 1; i <= m; i++) {
int s;
cin >> s;
vector<int> vec;
for (int i = 1; i <= s; i++) {
int v;
cin >> v;
vec.push_back(v);
}
sort(all(vec), [] (int v, int u) {
return tout[v] < tout[u];
});
for (int i = 0; i < s; i++) {
int v = vec[i], u = vec[(i + 1) % s], lca = LCA(u, v);
delta[v]++;
delta[u]++;
delta[lca] -= 2;
}
}
dfs2(1, 0, 0);
vector<int> vec;
for (int i = 1; i < n; i++)
if (ans[i] >= k)
vec.push_back(i);
cout << vec.size() << endl;
for (int e : vec) cout << e << sep;
cout << endl;
return 0;
}
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
2 ms |
2640 KB |
Output is correct |
2 |
Correct |
7 ms |
4048 KB |
Output is correct |
3 |
Correct |
6 ms |
4048 KB |
Output is correct |
4 |
Correct |
2 ms |
2640 KB |
Output is correct |
5 |
Correct |
2 ms |
2640 KB |
Output is correct |
6 |
Correct |
7 ms |
4616 KB |
Output is correct |
7 |
Correct |
6 ms |
4176 KB |
Output is correct |
8 |
Correct |
6 ms |
4096 KB |
Output is correct |
9 |
Correct |
6 ms |
4176 KB |
Output is correct |
10 |
Correct |
2 ms |
2676 KB |
Output is correct |
11 |
Correct |
2 ms |
2640 KB |
Output is correct |
12 |
Correct |
2 ms |
2640 KB |
Output is correct |
13 |
Correct |
2 ms |
2640 KB |
Output is correct |
14 |
Correct |
2 ms |
2696 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
2 ms |
2640 KB |
Output is correct |
2 |
Correct |
7 ms |
4048 KB |
Output is correct |
3 |
Correct |
6 ms |
4048 KB |
Output is correct |
4 |
Correct |
2 ms |
2640 KB |
Output is correct |
5 |
Correct |
2 ms |
2640 KB |
Output is correct |
6 |
Correct |
7 ms |
4616 KB |
Output is correct |
7 |
Correct |
6 ms |
4176 KB |
Output is correct |
8 |
Correct |
6 ms |
4096 KB |
Output is correct |
9 |
Correct |
6 ms |
4176 KB |
Output is correct |
10 |
Correct |
2 ms |
2676 KB |
Output is correct |
11 |
Correct |
2 ms |
2640 KB |
Output is correct |
12 |
Correct |
2 ms |
2640 KB |
Output is correct |
13 |
Correct |
2 ms |
2640 KB |
Output is correct |
14 |
Correct |
2 ms |
2696 KB |
Output is correct |
15 |
Correct |
22 ms |
4424 KB |
Output is correct |
16 |
Correct |
25 ms |
4460 KB |
Output is correct |
17 |
Correct |
25 ms |
4580 KB |
Output is correct |
18 |
Correct |
7 ms |
4560 KB |
Output is correct |
19 |
Correct |
6 ms |
4176 KB |
Output is correct |
20 |
Correct |
21 ms |
4680 KB |
Output is correct |
21 |
Correct |
28 ms |
4616 KB |
Output is correct |
22 |
Correct |
2 ms |
2640 KB |
Output is correct |
23 |
Correct |
7 ms |
4060 KB |
Output is correct |
24 |
Correct |
6 ms |
4048 KB |
Output is correct |
25 |
Correct |
2 ms |
2640 KB |
Output is correct |
26 |
Correct |
2 ms |
2640 KB |
Output is correct |
27 |
Correct |
8 ms |
4560 KB |
Output is correct |
28 |
Correct |
8 ms |
4228 KB |
Output is correct |
29 |
Correct |
5 ms |
4048 KB |
Output is correct |
30 |
Correct |
6 ms |
4176 KB |
Output is correct |
31 |
Correct |
2 ms |
2640 KB |
Output is correct |
32 |
Correct |
2 ms |
2640 KB |
Output is correct |
33 |
Correct |
2 ms |
2676 KB |
Output is correct |
34 |
Correct |
2 ms |
2640 KB |
Output is correct |
35 |
Correct |
1 ms |
2640 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
101 ms |
26216 KB |
Output is correct |
2 |
Correct |
2 ms |
2640 KB |
Output is correct |
3 |
Correct |
94 ms |
25796 KB |
Output is correct |
4 |
Correct |
99 ms |
25208 KB |
Output is correct |
5 |
Correct |
105 ms |
26104 KB |
Output is correct |
6 |
Correct |
91 ms |
26428 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
86 ms |
21644 KB |
Output is correct |
2 |
Correct |
90 ms |
18344 KB |
Output is correct |
3 |
Correct |
101 ms |
17948 KB |
Output is correct |
4 |
Correct |
96 ms |
17920 KB |
Output is correct |
5 |
Correct |
96 ms |
17948 KB |
Output is correct |
6 |
Correct |
78 ms |
21832 KB |
Output is correct |
7 |
Correct |
77 ms |
21564 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
86 ms |
21644 KB |
Output is correct |
2 |
Correct |
90 ms |
18344 KB |
Output is correct |
3 |
Correct |
101 ms |
17948 KB |
Output is correct |
4 |
Correct |
96 ms |
17920 KB |
Output is correct |
5 |
Correct |
96 ms |
17948 KB |
Output is correct |
6 |
Correct |
78 ms |
21832 KB |
Output is correct |
7 |
Correct |
77 ms |
21564 KB |
Output is correct |
8 |
Correct |
82 ms |
21832 KB |
Output is correct |
9 |
Correct |
88 ms |
21832 KB |
Output is correct |
10 |
Correct |
99 ms |
26112 KB |
Output is correct |
11 |
Correct |
88 ms |
26048 KB |
Output is correct |
12 |
Correct |
76 ms |
17636 KB |
Output is correct |
13 |
Correct |
67 ms |
17736 KB |
Output is correct |
14 |
Correct |
98 ms |
17816 KB |
Output is correct |
15 |
Correct |
91 ms |
17800 KB |
Output is correct |
16 |
Correct |
102 ms |
18076 KB |
Output is correct |
17 |
Correct |
99 ms |
17864 KB |
Output is correct |
18 |
Correct |
96 ms |
17920 KB |
Output is correct |
19 |
Correct |
86 ms |
18248 KB |
Output is correct |
20 |
Correct |
81 ms |
21896 KB |
Output is correct |
21 |
Correct |
85 ms |
21984 KB |
Output is correct |
22 |
Correct |
80 ms |
21904 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
2 ms |
2640 KB |
Output is correct |
2 |
Correct |
7 ms |
4048 KB |
Output is correct |
3 |
Correct |
6 ms |
4048 KB |
Output is correct |
4 |
Correct |
2 ms |
2640 KB |
Output is correct |
5 |
Correct |
2 ms |
2640 KB |
Output is correct |
6 |
Correct |
7 ms |
4616 KB |
Output is correct |
7 |
Correct |
6 ms |
4176 KB |
Output is correct |
8 |
Correct |
6 ms |
4096 KB |
Output is correct |
9 |
Correct |
6 ms |
4176 KB |
Output is correct |
10 |
Correct |
2 ms |
2676 KB |
Output is correct |
11 |
Correct |
2 ms |
2640 KB |
Output is correct |
12 |
Correct |
2 ms |
2640 KB |
Output is correct |
13 |
Correct |
2 ms |
2640 KB |
Output is correct |
14 |
Correct |
2 ms |
2696 KB |
Output is correct |
15 |
Correct |
22 ms |
4424 KB |
Output is correct |
16 |
Correct |
25 ms |
4460 KB |
Output is correct |
17 |
Correct |
25 ms |
4580 KB |
Output is correct |
18 |
Correct |
7 ms |
4560 KB |
Output is correct |
19 |
Correct |
6 ms |
4176 KB |
Output is correct |
20 |
Correct |
21 ms |
4680 KB |
Output is correct |
21 |
Correct |
28 ms |
4616 KB |
Output is correct |
22 |
Correct |
2 ms |
2640 KB |
Output is correct |
23 |
Correct |
7 ms |
4060 KB |
Output is correct |
24 |
Correct |
6 ms |
4048 KB |
Output is correct |
25 |
Correct |
2 ms |
2640 KB |
Output is correct |
26 |
Correct |
2 ms |
2640 KB |
Output is correct |
27 |
Correct |
8 ms |
4560 KB |
Output is correct |
28 |
Correct |
8 ms |
4228 KB |
Output is correct |
29 |
Correct |
5 ms |
4048 KB |
Output is correct |
30 |
Correct |
6 ms |
4176 KB |
Output is correct |
31 |
Correct |
2 ms |
2640 KB |
Output is correct |
32 |
Correct |
2 ms |
2640 KB |
Output is correct |
33 |
Correct |
2 ms |
2676 KB |
Output is correct |
34 |
Correct |
2 ms |
2640 KB |
Output is correct |
35 |
Correct |
1 ms |
2640 KB |
Output is correct |
36 |
Correct |
101 ms |
26216 KB |
Output is correct |
37 |
Correct |
2 ms |
2640 KB |
Output is correct |
38 |
Correct |
94 ms |
25796 KB |
Output is correct |
39 |
Correct |
99 ms |
25208 KB |
Output is correct |
40 |
Correct |
105 ms |
26104 KB |
Output is correct |
41 |
Correct |
91 ms |
26428 KB |
Output is correct |
42 |
Correct |
86 ms |
21644 KB |
Output is correct |
43 |
Correct |
90 ms |
18344 KB |
Output is correct |
44 |
Correct |
101 ms |
17948 KB |
Output is correct |
45 |
Correct |
96 ms |
17920 KB |
Output is correct |
46 |
Correct |
96 ms |
17948 KB |
Output is correct |
47 |
Correct |
78 ms |
21832 KB |
Output is correct |
48 |
Correct |
77 ms |
21564 KB |
Output is correct |
49 |
Correct |
82 ms |
21832 KB |
Output is correct |
50 |
Correct |
88 ms |
21832 KB |
Output is correct |
51 |
Correct |
99 ms |
26112 KB |
Output is correct |
52 |
Correct |
88 ms |
26048 KB |
Output is correct |
53 |
Correct |
76 ms |
17636 KB |
Output is correct |
54 |
Correct |
67 ms |
17736 KB |
Output is correct |
55 |
Correct |
98 ms |
17816 KB |
Output is correct |
56 |
Correct |
91 ms |
17800 KB |
Output is correct |
57 |
Correct |
102 ms |
18076 KB |
Output is correct |
58 |
Correct |
99 ms |
17864 KB |
Output is correct |
59 |
Correct |
96 ms |
17920 KB |
Output is correct |
60 |
Correct |
86 ms |
18248 KB |
Output is correct |
61 |
Correct |
81 ms |
21896 KB |
Output is correct |
62 |
Correct |
85 ms |
21984 KB |
Output is correct |
63 |
Correct |
80 ms |
21904 KB |
Output is correct |
64 |
Correct |
87 ms |
22084 KB |
Output is correct |
65 |
Correct |
95 ms |
17864 KB |
Output is correct |
66 |
Correct |
101 ms |
17808 KB |
Output is correct |
67 |
Correct |
98 ms |
17812 KB |
Output is correct |
68 |
Correct |
67 ms |
17564 KB |
Output is correct |
69 |
Correct |
59 ms |
17608 KB |
Output is correct |
70 |
Correct |
98 ms |
22352 KB |
Output is correct |
71 |
Correct |
86 ms |
21684 KB |
Output is correct |
72 |
Correct |
2 ms |
2640 KB |
Output is correct |
73 |
Correct |
6 ms |
4048 KB |
Output is correct |
74 |
Correct |
8 ms |
4048 KB |
Output is correct |
75 |
Correct |
2 ms |
2640 KB |
Output is correct |
76 |
Correct |
2 ms |
2676 KB |
Output is correct |
77 |
Correct |
7 ms |
4560 KB |
Output is correct |
78 |
Correct |
6 ms |
4176 KB |
Output is correct |
79 |
Correct |
5 ms |
4048 KB |
Output is correct |
80 |
Correct |
5 ms |
4152 KB |
Output is correct |
81 |
Correct |
2 ms |
2640 KB |
Output is correct |
82 |
Correct |
2 ms |
2640 KB |
Output is correct |
83 |
Correct |
2 ms |
2640 KB |
Output is correct |
84 |
Correct |
2 ms |
2640 KB |
Output is correct |
85 |
Correct |
2 ms |
2640 KB |
Output is correct |
86 |
Correct |
21 ms |
4484 KB |
Output is correct |
87 |
Correct |
25 ms |
4424 KB |
Output is correct |
88 |
Correct |
22 ms |
4552 KB |
Output is correct |
89 |
Correct |
7 ms |
4516 KB |
Output is correct |
90 |
Correct |
7 ms |
4176 KB |
Output is correct |
91 |
Correct |
21 ms |
4636 KB |
Output is correct |
92 |
Correct |
30 ms |
4620 KB |
Output is correct |
93 |
Correct |
3 ms |
2640 KB |
Output is correct |
94 |
Correct |
96 ms |
26016 KB |
Output is correct |
95 |
Correct |
100 ms |
25732 KB |
Output is correct |
96 |
Correct |
89 ms |
25116 KB |
Output is correct |
97 |
Correct |
104 ms |
26104 KB |
Output is correct |
98 |
Correct |
96 ms |
26468 KB |
Output is correct |
99 |
Correct |
90 ms |
17864 KB |
Output is correct |
100 |
Correct |
100 ms |
18060 KB |
Output is correct |
101 |
Correct |
97 ms |
17872 KB |
Output is correct |
102 |
Correct |
84 ms |
18244 KB |
Output is correct |
103 |
Correct |
81 ms |
21684 KB |
Output is correct |
104 |
Correct |
82 ms |
21944 KB |
Output is correct |
105 |
Correct |
79 ms |
21576 KB |
Output is correct |
106 |
Correct |
90 ms |
21992 KB |
Output is correct |
107 |
Correct |
88 ms |
21820 KB |
Output is correct |
108 |
Correct |
96 ms |
26176 KB |
Output is correct |
109 |
Correct |
95 ms |
26216 KB |
Output is correct |
110 |
Correct |
77 ms |
17644 KB |
Output is correct |
111 |
Correct |
79 ms |
17740 KB |
Output is correct |
112 |
Correct |
89 ms |
17816 KB |
Output is correct |
113 |
Correct |
99 ms |
17788 KB |
Output is correct |