#include <bits/stdc++.h>
typedef long long ll;
using namespace std;
const int maxn = 1e5 + 5, logn = 17;
int n, m, k, l[logn][maxn], tin[maxn], d[maxn], sum[maxn], id[maxn], timer = 0;
vector<pair<int, int> > g[maxn];
void dfs1(int u)
{
tin[u] = timer++;
for (int i = 1; i < logn; i++) l[i][u] = l[i-1][l[i-1][u]];
for (pair<int, int> v : g[u])
{
if (v.first == l[0][u]) continue;
l[0][v.first] = u, d[v.first] = d[u] + 1;
id[v.first] = v.second;
dfs1(v.first);
}
}
int lca(int a, int b)
{
if (d[a] < d[b]) swap(a, b);
for (int i = logn-1; i >= 0; i--) if (d[l[i][a]] >= d[b]) a = l[i][a];
if (a==b) return a;
for (int i = logn-1; i >= 0; i--) if (l[i][a] ^ l[i][b]) a = l[i][a], b = l[i][b];
return l[0][a];
}
vector<int> ans;
void dfs2(int u)
{
for (pair<int, int> v : g[u]) if (v.first ^ l[0][u])
{
dfs2(v.first);
sum[u] += sum[v.first];
}
if (sum[u] >= k) ans.push_back(id[u]);
}
int main()
{
ios::sync_with_stdio(false);
cin.tie(0);
cin >> n >> m >> k;
for (int i = 0, a, b; i < n-1; i++)
{
cin >> a >> b, a--, b--;
g[a].push_back({b, i+1}), g[b].push_back({a, i+1});
}
dfs1(0);
for (int i = 0; i < m; i++)
{
int s; cin >> s;
vector<pair<int, int> > v(s);
for (int j = 0; j < s; j++) cin >> v[j].second, sum[--v[j].second]++, v[j].first = tin[v[j].second];
sort(v.begin(), v.end());
int root = v[0].second;
for (int j = 1; j < s; j++)
{
int l = lca(v[j-1].second, v[j].second);
root = lca(root, v[j].second);
sum[l]--;
}
sum[root]--;
}
dfs2(0);
cout << ans.size() << "\n";
sort(ans.begin(), ans.end());
for (int i : ans) cout << i << " ";
cout << "\n";
return 0;
}
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
2 ms |
2664 KB |
Output is correct |
2 |
Correct |
7 ms |
4044 KB |
Output is correct |
3 |
Correct |
7 ms |
4044 KB |
Output is correct |
4 |
Correct |
2 ms |
2668 KB |
Output is correct |
5 |
Correct |
3 ms |
2680 KB |
Output is correct |
6 |
Correct |
8 ms |
4428 KB |
Output is correct |
7 |
Correct |
8 ms |
4044 KB |
Output is correct |
8 |
Correct |
7 ms |
4056 KB |
Output is correct |
9 |
Correct |
7 ms |
4092 KB |
Output is correct |
10 |
Correct |
2 ms |
2764 KB |
Output is correct |
11 |
Correct |
2 ms |
2764 KB |
Output is correct |
12 |
Correct |
2 ms |
2764 KB |
Output is correct |
13 |
Correct |
2 ms |
2696 KB |
Output is correct |
14 |
Correct |
2 ms |
2764 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
2 ms |
2664 KB |
Output is correct |
2 |
Correct |
7 ms |
4044 KB |
Output is correct |
3 |
Correct |
7 ms |
4044 KB |
Output is correct |
4 |
Correct |
2 ms |
2668 KB |
Output is correct |
5 |
Correct |
3 ms |
2680 KB |
Output is correct |
6 |
Correct |
8 ms |
4428 KB |
Output is correct |
7 |
Correct |
8 ms |
4044 KB |
Output is correct |
8 |
Correct |
7 ms |
4056 KB |
Output is correct |
9 |
Correct |
7 ms |
4092 KB |
Output is correct |
10 |
Correct |
2 ms |
2764 KB |
Output is correct |
11 |
Correct |
2 ms |
2764 KB |
Output is correct |
12 |
Correct |
2 ms |
2764 KB |
Output is correct |
13 |
Correct |
2 ms |
2696 KB |
Output is correct |
14 |
Correct |
2 ms |
2764 KB |
Output is correct |
15 |
Correct |
39 ms |
4436 KB |
Output is correct |
16 |
Correct |
40 ms |
4468 KB |
Output is correct |
17 |
Correct |
40 ms |
4428 KB |
Output is correct |
18 |
Correct |
8 ms |
4428 KB |
Output is correct |
19 |
Correct |
7 ms |
4044 KB |
Output is correct |
20 |
Correct |
38 ms |
4564 KB |
Output is correct |
21 |
Correct |
42 ms |
4496 KB |
Output is correct |
22 |
Correct |
2 ms |
2764 KB |
Output is correct |
23 |
Correct |
8 ms |
3976 KB |
Output is correct |
24 |
Correct |
8 ms |
4076 KB |
Output is correct |
25 |
Correct |
2 ms |
2764 KB |
Output is correct |
26 |
Correct |
2 ms |
2764 KB |
Output is correct |
27 |
Correct |
8 ms |
4388 KB |
Output is correct |
28 |
Correct |
7 ms |
4096 KB |
Output is correct |
29 |
Correct |
6 ms |
4092 KB |
Output is correct |
30 |
Correct |
7 ms |
4044 KB |
Output is correct |
31 |
Correct |
2 ms |
2764 KB |
Output is correct |
32 |
Correct |
2 ms |
2764 KB |
Output is correct |
33 |
Correct |
2 ms |
2764 KB |
Output is correct |
34 |
Correct |
2 ms |
2764 KB |
Output is correct |
35 |
Correct |
2 ms |
2764 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
131 ms |
23020 KB |
Output is correct |
2 |
Correct |
2 ms |
2764 KB |
Output is correct |
3 |
Correct |
120 ms |
22584 KB |
Output is correct |
4 |
Correct |
118 ms |
22084 KB |
Output is correct |
5 |
Correct |
192 ms |
22912 KB |
Output is correct |
6 |
Correct |
147 ms |
23268 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
97 ms |
19400 KB |
Output is correct |
2 |
Correct |
121 ms |
16708 KB |
Output is correct |
3 |
Correct |
137 ms |
16396 KB |
Output is correct |
4 |
Correct |
132 ms |
16276 KB |
Output is correct |
5 |
Correct |
133 ms |
16324 KB |
Output is correct |
6 |
Correct |
93 ms |
19520 KB |
Output is correct |
7 |
Correct |
93 ms |
19420 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
97 ms |
19400 KB |
Output is correct |
2 |
Correct |
121 ms |
16708 KB |
Output is correct |
3 |
Correct |
137 ms |
16396 KB |
Output is correct |
4 |
Correct |
132 ms |
16276 KB |
Output is correct |
5 |
Correct |
133 ms |
16324 KB |
Output is correct |
6 |
Correct |
93 ms |
19520 KB |
Output is correct |
7 |
Correct |
93 ms |
19420 KB |
Output is correct |
8 |
Correct |
119 ms |
19572 KB |
Output is correct |
9 |
Correct |
116 ms |
19524 KB |
Output is correct |
10 |
Correct |
147 ms |
22972 KB |
Output is correct |
11 |
Correct |
148 ms |
23044 KB |
Output is correct |
12 |
Correct |
102 ms |
16080 KB |
Output is correct |
13 |
Correct |
98 ms |
16088 KB |
Output is correct |
14 |
Correct |
142 ms |
16264 KB |
Output is correct |
15 |
Correct |
147 ms |
16328 KB |
Output is correct |
16 |
Correct |
135 ms |
16324 KB |
Output is correct |
17 |
Correct |
136 ms |
16324 KB |
Output is correct |
18 |
Correct |
133 ms |
16504 KB |
Output is correct |
19 |
Correct |
120 ms |
16776 KB |
Output is correct |
20 |
Correct |
93 ms |
19768 KB |
Output is correct |
21 |
Correct |
95 ms |
19856 KB |
Output is correct |
22 |
Correct |
100 ms |
19848 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
2 ms |
2664 KB |
Output is correct |
2 |
Correct |
7 ms |
4044 KB |
Output is correct |
3 |
Correct |
7 ms |
4044 KB |
Output is correct |
4 |
Correct |
2 ms |
2668 KB |
Output is correct |
5 |
Correct |
3 ms |
2680 KB |
Output is correct |
6 |
Correct |
8 ms |
4428 KB |
Output is correct |
7 |
Correct |
8 ms |
4044 KB |
Output is correct |
8 |
Correct |
7 ms |
4056 KB |
Output is correct |
9 |
Correct |
7 ms |
4092 KB |
Output is correct |
10 |
Correct |
2 ms |
2764 KB |
Output is correct |
11 |
Correct |
2 ms |
2764 KB |
Output is correct |
12 |
Correct |
2 ms |
2764 KB |
Output is correct |
13 |
Correct |
2 ms |
2696 KB |
Output is correct |
14 |
Correct |
2 ms |
2764 KB |
Output is correct |
15 |
Correct |
39 ms |
4436 KB |
Output is correct |
16 |
Correct |
40 ms |
4468 KB |
Output is correct |
17 |
Correct |
40 ms |
4428 KB |
Output is correct |
18 |
Correct |
8 ms |
4428 KB |
Output is correct |
19 |
Correct |
7 ms |
4044 KB |
Output is correct |
20 |
Correct |
38 ms |
4564 KB |
Output is correct |
21 |
Correct |
42 ms |
4496 KB |
Output is correct |
22 |
Correct |
2 ms |
2764 KB |
Output is correct |
23 |
Correct |
8 ms |
3976 KB |
Output is correct |
24 |
Correct |
8 ms |
4076 KB |
Output is correct |
25 |
Correct |
2 ms |
2764 KB |
Output is correct |
26 |
Correct |
2 ms |
2764 KB |
Output is correct |
27 |
Correct |
8 ms |
4388 KB |
Output is correct |
28 |
Correct |
7 ms |
4096 KB |
Output is correct |
29 |
Correct |
6 ms |
4092 KB |
Output is correct |
30 |
Correct |
7 ms |
4044 KB |
Output is correct |
31 |
Correct |
2 ms |
2764 KB |
Output is correct |
32 |
Correct |
2 ms |
2764 KB |
Output is correct |
33 |
Correct |
2 ms |
2764 KB |
Output is correct |
34 |
Correct |
2 ms |
2764 KB |
Output is correct |
35 |
Correct |
2 ms |
2764 KB |
Output is correct |
36 |
Correct |
131 ms |
23020 KB |
Output is correct |
37 |
Correct |
2 ms |
2764 KB |
Output is correct |
38 |
Correct |
120 ms |
22584 KB |
Output is correct |
39 |
Correct |
118 ms |
22084 KB |
Output is correct |
40 |
Correct |
192 ms |
22912 KB |
Output is correct |
41 |
Correct |
147 ms |
23268 KB |
Output is correct |
42 |
Correct |
97 ms |
19400 KB |
Output is correct |
43 |
Correct |
121 ms |
16708 KB |
Output is correct |
44 |
Correct |
137 ms |
16396 KB |
Output is correct |
45 |
Correct |
132 ms |
16276 KB |
Output is correct |
46 |
Correct |
133 ms |
16324 KB |
Output is correct |
47 |
Correct |
93 ms |
19520 KB |
Output is correct |
48 |
Correct |
93 ms |
19420 KB |
Output is correct |
49 |
Correct |
119 ms |
19572 KB |
Output is correct |
50 |
Correct |
116 ms |
19524 KB |
Output is correct |
51 |
Correct |
147 ms |
22972 KB |
Output is correct |
52 |
Correct |
148 ms |
23044 KB |
Output is correct |
53 |
Correct |
102 ms |
16080 KB |
Output is correct |
54 |
Correct |
98 ms |
16088 KB |
Output is correct |
55 |
Correct |
142 ms |
16264 KB |
Output is correct |
56 |
Correct |
147 ms |
16328 KB |
Output is correct |
57 |
Correct |
135 ms |
16324 KB |
Output is correct |
58 |
Correct |
136 ms |
16324 KB |
Output is correct |
59 |
Correct |
133 ms |
16504 KB |
Output is correct |
60 |
Correct |
120 ms |
16776 KB |
Output is correct |
61 |
Correct |
93 ms |
19768 KB |
Output is correct |
62 |
Correct |
95 ms |
19856 KB |
Output is correct |
63 |
Correct |
100 ms |
19848 KB |
Output is correct |
64 |
Correct |
104 ms |
19704 KB |
Output is correct |
65 |
Correct |
183 ms |
16324 KB |
Output is correct |
66 |
Correct |
172 ms |
16324 KB |
Output is correct |
67 |
Correct |
154 ms |
16300 KB |
Output is correct |
68 |
Correct |
93 ms |
16068 KB |
Output is correct |
69 |
Correct |
92 ms |
16036 KB |
Output is correct |
70 |
Correct |
123 ms |
20024 KB |
Output is correct |
71 |
Correct |
132 ms |
19268 KB |
Output is correct |
72 |
Correct |
2 ms |
2764 KB |
Output is correct |
73 |
Correct |
8 ms |
4044 KB |
Output is correct |
74 |
Correct |
8 ms |
4044 KB |
Output is correct |
75 |
Correct |
2 ms |
2672 KB |
Output is correct |
76 |
Correct |
2 ms |
2764 KB |
Output is correct |
77 |
Correct |
8 ms |
4428 KB |
Output is correct |
78 |
Correct |
8 ms |
4044 KB |
Output is correct |
79 |
Correct |
6 ms |
4088 KB |
Output is correct |
80 |
Correct |
8 ms |
4044 KB |
Output is correct |
81 |
Correct |
2 ms |
2764 KB |
Output is correct |
82 |
Correct |
2 ms |
2764 KB |
Output is correct |
83 |
Correct |
2 ms |
2764 KB |
Output is correct |
84 |
Correct |
2 ms |
2764 KB |
Output is correct |
85 |
Correct |
2 ms |
2764 KB |
Output is correct |
86 |
Correct |
40 ms |
4428 KB |
Output is correct |
87 |
Correct |
41 ms |
4420 KB |
Output is correct |
88 |
Correct |
41 ms |
4472 KB |
Output is correct |
89 |
Correct |
8 ms |
4348 KB |
Output is correct |
90 |
Correct |
8 ms |
4044 KB |
Output is correct |
91 |
Correct |
38 ms |
4564 KB |
Output is correct |
92 |
Correct |
41 ms |
4548 KB |
Output is correct |
93 |
Correct |
2 ms |
2888 KB |
Output is correct |
94 |
Correct |
126 ms |
22964 KB |
Output is correct |
95 |
Correct |
145 ms |
22544 KB |
Output is correct |
96 |
Correct |
136 ms |
22128 KB |
Output is correct |
97 |
Correct |
199 ms |
22960 KB |
Output is correct |
98 |
Correct |
149 ms |
23356 KB |
Output is correct |
99 |
Correct |
158 ms |
16400 KB |
Output is correct |
100 |
Correct |
147 ms |
16324 KB |
Output is correct |
101 |
Correct |
145 ms |
16388 KB |
Output is correct |
102 |
Correct |
135 ms |
16708 KB |
Output is correct |
103 |
Correct |
93 ms |
19536 KB |
Output is correct |
104 |
Correct |
99 ms |
19760 KB |
Output is correct |
105 |
Correct |
100 ms |
19480 KB |
Output is correct |
106 |
Correct |
114 ms |
19624 KB |
Output is correct |
107 |
Correct |
154 ms |
19504 KB |
Output is correct |
108 |
Correct |
142 ms |
23044 KB |
Output is correct |
109 |
Correct |
144 ms |
22972 KB |
Output is correct |
110 |
Correct |
100 ms |
16108 KB |
Output is correct |
111 |
Correct |
125 ms |
16172 KB |
Output is correct |
112 |
Correct |
159 ms |
16256 KB |
Output is correct |
113 |
Correct |
154 ms |
16380 KB |
Output is correct |