#include<bits/stdc++.h>
using namespace std;
#define F first
#define S second
#define endl '\n'
typedef long long ll;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;
const int N = 1e5 + 50;
int n, m, k, out[N], par[20][N], h[N], st[N], ft[N], t, p[N];
pii E[N];
vector<int> adj[N];
vector<int> vc;
void dfs(int u, int p) {
st[u] = ++t;
par[0][u] = p;
h[u] = h[p]+1;
for (int v:adj[u]) {
if (v == p) continue;
dfs(v, u);
}
ft[u] = t;
}
int Par(int u, int k) {
for (int i = 0; i < 20; i++) {
if (k>>i&1) u = par[i][u];
}
return u;
}
int LCA(int u, int v) {
if (h[u] < h[v]) swap(u, v);
u = Par(u, h[u]-h[v]);
if (u == v) return u;
for (int i = 19; i >= 0; i--) {
if (par[i][u] != par[i][v]) {
u = par[i][u];
v = par[i][v];
}
}
return par[0][u];
}
void dfs2(int u, int p) {
for (int v:adj[u]) {
if (v == p) continue;
dfs2(v, u);
out[u]+= out[v];
}
}
bool cmp(int u, int v) {
return st[u] < st[v];
}
void solve() {
cin >> n >> m >> k;
for (int i=1; i <= n-1; i++) {
int u,v;
cin >> u >> v;
E[i] = {u, v};
adj[u].push_back(v);
adj[v].push_back(u);
}
dfs(1,0);
for (int k = 1; k < 20; k++) {
for (int u = 1; u <= n; u++) {
par[k][u] = par[k-1][par[k-1][u]];
}
}
while (m--) {
vc.clear();
int s;
cin >> s;
for (int i = 1; i <= s; i++) {
int u;
cin >> u;
vc.push_back(u);
}
sort(vc.begin(), vc.end(), cmp);
for (int i = 1; i < s; i++) {
vc.push_back(LCA(vc[i-1], vc[i]));
}
sort(vc.begin(), vc.end(), cmp);
vc.resize(unique(vc.begin(), vc.end()) - vc.begin());
p[vc[0]] = 0;
for (int i = 1; i < (int)vc.size(); i++) {
int u = vc[i];
p[u] = vc[i-1];
while (p[u] > 0 && ft[p[u]] < ft[u]) p[u] = p[p[u]];
out[u]++, out[p[u]]--;
}
}
dfs2(1, 0);
int ans = 0;
for (int i = 1; i <= n-1; i++) {
if (par[0][E[i].S] == E[i].F) swap(E[i].F, E[i].S);
if (out[E[i].F] >= k) ans++;
}
cout << ans << endl;
for (int i = 1; i <= n-1; i++) {
if (out[E[i].F] >= k) cout << i << ' ';
}
cout << endl;
}
int main() {
ios::sync_with_stdio(0), cin.tie(0), cout.tie(0);
solve();
return 0;
}
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
2 ms |
2772 KB |
Output is correct |
2 |
Correct |
5 ms |
4180 KB |
Output is correct |
3 |
Correct |
5 ms |
4180 KB |
Output is correct |
4 |
Correct |
2 ms |
2772 KB |
Output is correct |
5 |
Correct |
2 ms |
2772 KB |
Output is correct |
6 |
Correct |
5 ms |
4564 KB |
Output is correct |
7 |
Correct |
5 ms |
4180 KB |
Output is correct |
8 |
Correct |
4 ms |
4180 KB |
Output is correct |
9 |
Correct |
6 ms |
4308 KB |
Output is correct |
10 |
Correct |
1 ms |
2772 KB |
Output is correct |
11 |
Correct |
1 ms |
2772 KB |
Output is correct |
12 |
Correct |
2 ms |
2772 KB |
Output is correct |
13 |
Correct |
2 ms |
2772 KB |
Output is correct |
14 |
Correct |
1 ms |
2772 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
2 ms |
2772 KB |
Output is correct |
2 |
Correct |
5 ms |
4180 KB |
Output is correct |
3 |
Correct |
5 ms |
4180 KB |
Output is correct |
4 |
Correct |
2 ms |
2772 KB |
Output is correct |
5 |
Correct |
2 ms |
2772 KB |
Output is correct |
6 |
Correct |
5 ms |
4564 KB |
Output is correct |
7 |
Correct |
5 ms |
4180 KB |
Output is correct |
8 |
Correct |
4 ms |
4180 KB |
Output is correct |
9 |
Correct |
6 ms |
4308 KB |
Output is correct |
10 |
Correct |
1 ms |
2772 KB |
Output is correct |
11 |
Correct |
1 ms |
2772 KB |
Output is correct |
12 |
Correct |
2 ms |
2772 KB |
Output is correct |
13 |
Correct |
2 ms |
2772 KB |
Output is correct |
14 |
Correct |
1 ms |
2772 KB |
Output is correct |
15 |
Correct |
28 ms |
4052 KB |
Output is correct |
16 |
Correct |
28 ms |
4176 KB |
Output is correct |
17 |
Correct |
29 ms |
4308 KB |
Output is correct |
18 |
Correct |
6 ms |
4464 KB |
Output is correct |
19 |
Correct |
5 ms |
4180 KB |
Output is correct |
20 |
Correct |
22 ms |
4212 KB |
Output is correct |
21 |
Correct |
28 ms |
4180 KB |
Output is correct |
22 |
Correct |
1 ms |
2772 KB |
Output is correct |
23 |
Correct |
5 ms |
4180 KB |
Output is correct |
24 |
Correct |
5 ms |
4180 KB |
Output is correct |
25 |
Correct |
2 ms |
2772 KB |
Output is correct |
26 |
Correct |
2 ms |
2772 KB |
Output is correct |
27 |
Correct |
5 ms |
4564 KB |
Output is correct |
28 |
Correct |
5 ms |
4272 KB |
Output is correct |
29 |
Correct |
5 ms |
4180 KB |
Output is correct |
30 |
Correct |
5 ms |
4180 KB |
Output is correct |
31 |
Correct |
1 ms |
2772 KB |
Output is correct |
32 |
Correct |
2 ms |
2772 KB |
Output is correct |
33 |
Correct |
2 ms |
2772 KB |
Output is correct |
34 |
Correct |
2 ms |
2772 KB |
Output is correct |
35 |
Correct |
2 ms |
2772 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
69 ms |
24592 KB |
Output is correct |
2 |
Correct |
1 ms |
2772 KB |
Output is correct |
3 |
Correct |
74 ms |
24376 KB |
Output is correct |
4 |
Correct |
64 ms |
24172 KB |
Output is correct |
5 |
Correct |
76 ms |
24636 KB |
Output is correct |
6 |
Correct |
81 ms |
24780 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
55 ms |
20116 KB |
Output is correct |
2 |
Correct |
64 ms |
16756 KB |
Output is correct |
3 |
Correct |
76 ms |
16352 KB |
Output is correct |
4 |
Correct |
73 ms |
16420 KB |
Output is correct |
5 |
Correct |
69 ms |
16456 KB |
Output is correct |
6 |
Correct |
55 ms |
20092 KB |
Output is correct |
7 |
Correct |
56 ms |
20044 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
55 ms |
20116 KB |
Output is correct |
2 |
Correct |
64 ms |
16756 KB |
Output is correct |
3 |
Correct |
76 ms |
16352 KB |
Output is correct |
4 |
Correct |
73 ms |
16420 KB |
Output is correct |
5 |
Correct |
69 ms |
16456 KB |
Output is correct |
6 |
Correct |
55 ms |
20092 KB |
Output is correct |
7 |
Correct |
56 ms |
20044 KB |
Output is correct |
8 |
Correct |
74 ms |
20284 KB |
Output is correct |
9 |
Correct |
71 ms |
20300 KB |
Output is correct |
10 |
Correct |
72 ms |
24644 KB |
Output is correct |
11 |
Correct |
75 ms |
24640 KB |
Output is correct |
12 |
Correct |
90 ms |
16752 KB |
Output is correct |
13 |
Correct |
91 ms |
16796 KB |
Output is correct |
14 |
Correct |
85 ms |
16392 KB |
Output is correct |
15 |
Correct |
75 ms |
16472 KB |
Output is correct |
16 |
Correct |
70 ms |
16476 KB |
Output is correct |
17 |
Correct |
69 ms |
16544 KB |
Output is correct |
18 |
Correct |
64 ms |
16468 KB |
Output is correct |
19 |
Correct |
65 ms |
16808 KB |
Output is correct |
20 |
Correct |
58 ms |
20180 KB |
Output is correct |
21 |
Correct |
57 ms |
20292 KB |
Output is correct |
22 |
Correct |
58 ms |
20340 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
2 ms |
2772 KB |
Output is correct |
2 |
Correct |
5 ms |
4180 KB |
Output is correct |
3 |
Correct |
5 ms |
4180 KB |
Output is correct |
4 |
Correct |
2 ms |
2772 KB |
Output is correct |
5 |
Correct |
2 ms |
2772 KB |
Output is correct |
6 |
Correct |
5 ms |
4564 KB |
Output is correct |
7 |
Correct |
5 ms |
4180 KB |
Output is correct |
8 |
Correct |
4 ms |
4180 KB |
Output is correct |
9 |
Correct |
6 ms |
4308 KB |
Output is correct |
10 |
Correct |
1 ms |
2772 KB |
Output is correct |
11 |
Correct |
1 ms |
2772 KB |
Output is correct |
12 |
Correct |
2 ms |
2772 KB |
Output is correct |
13 |
Correct |
2 ms |
2772 KB |
Output is correct |
14 |
Correct |
1 ms |
2772 KB |
Output is correct |
15 |
Correct |
28 ms |
4052 KB |
Output is correct |
16 |
Correct |
28 ms |
4176 KB |
Output is correct |
17 |
Correct |
29 ms |
4308 KB |
Output is correct |
18 |
Correct |
6 ms |
4464 KB |
Output is correct |
19 |
Correct |
5 ms |
4180 KB |
Output is correct |
20 |
Correct |
22 ms |
4212 KB |
Output is correct |
21 |
Correct |
28 ms |
4180 KB |
Output is correct |
22 |
Correct |
1 ms |
2772 KB |
Output is correct |
23 |
Correct |
5 ms |
4180 KB |
Output is correct |
24 |
Correct |
5 ms |
4180 KB |
Output is correct |
25 |
Correct |
2 ms |
2772 KB |
Output is correct |
26 |
Correct |
2 ms |
2772 KB |
Output is correct |
27 |
Correct |
5 ms |
4564 KB |
Output is correct |
28 |
Correct |
5 ms |
4272 KB |
Output is correct |
29 |
Correct |
5 ms |
4180 KB |
Output is correct |
30 |
Correct |
5 ms |
4180 KB |
Output is correct |
31 |
Correct |
1 ms |
2772 KB |
Output is correct |
32 |
Correct |
2 ms |
2772 KB |
Output is correct |
33 |
Correct |
2 ms |
2772 KB |
Output is correct |
34 |
Correct |
2 ms |
2772 KB |
Output is correct |
35 |
Correct |
2 ms |
2772 KB |
Output is correct |
36 |
Correct |
69 ms |
24592 KB |
Output is correct |
37 |
Correct |
1 ms |
2772 KB |
Output is correct |
38 |
Correct |
74 ms |
24376 KB |
Output is correct |
39 |
Correct |
64 ms |
24172 KB |
Output is correct |
40 |
Correct |
76 ms |
24636 KB |
Output is correct |
41 |
Correct |
81 ms |
24780 KB |
Output is correct |
42 |
Correct |
55 ms |
20116 KB |
Output is correct |
43 |
Correct |
64 ms |
16756 KB |
Output is correct |
44 |
Correct |
76 ms |
16352 KB |
Output is correct |
45 |
Correct |
73 ms |
16420 KB |
Output is correct |
46 |
Correct |
69 ms |
16456 KB |
Output is correct |
47 |
Correct |
55 ms |
20092 KB |
Output is correct |
48 |
Correct |
56 ms |
20044 KB |
Output is correct |
49 |
Correct |
74 ms |
20284 KB |
Output is correct |
50 |
Correct |
71 ms |
20300 KB |
Output is correct |
51 |
Correct |
72 ms |
24644 KB |
Output is correct |
52 |
Correct |
75 ms |
24640 KB |
Output is correct |
53 |
Correct |
90 ms |
16752 KB |
Output is correct |
54 |
Correct |
91 ms |
16796 KB |
Output is correct |
55 |
Correct |
85 ms |
16392 KB |
Output is correct |
56 |
Correct |
75 ms |
16472 KB |
Output is correct |
57 |
Correct |
70 ms |
16476 KB |
Output is correct |
58 |
Correct |
69 ms |
16544 KB |
Output is correct |
59 |
Correct |
64 ms |
16468 KB |
Output is correct |
60 |
Correct |
65 ms |
16808 KB |
Output is correct |
61 |
Correct |
58 ms |
20180 KB |
Output is correct |
62 |
Correct |
57 ms |
20292 KB |
Output is correct |
63 |
Correct |
58 ms |
20340 KB |
Output is correct |
64 |
Correct |
61 ms |
20392 KB |
Output is correct |
65 |
Correct |
78 ms |
16464 KB |
Output is correct |
66 |
Correct |
99 ms |
16456 KB |
Output is correct |
67 |
Correct |
112 ms |
16392 KB |
Output is correct |
68 |
Correct |
56 ms |
16856 KB |
Output is correct |
69 |
Correct |
64 ms |
16860 KB |
Output is correct |
70 |
Correct |
68 ms |
20468 KB |
Output is correct |
71 |
Correct |
73 ms |
20196 KB |
Output is correct |
72 |
Correct |
2 ms |
2772 KB |
Output is correct |
73 |
Correct |
5 ms |
4052 KB |
Output is correct |
74 |
Correct |
5 ms |
4052 KB |
Output is correct |
75 |
Correct |
2 ms |
2772 KB |
Output is correct |
76 |
Correct |
1 ms |
2792 KB |
Output is correct |
77 |
Correct |
5 ms |
4488 KB |
Output is correct |
78 |
Correct |
5 ms |
4152 KB |
Output is correct |
79 |
Correct |
4 ms |
4180 KB |
Output is correct |
80 |
Correct |
5 ms |
4180 KB |
Output is correct |
81 |
Correct |
2 ms |
2772 KB |
Output is correct |
82 |
Correct |
1 ms |
2772 KB |
Output is correct |
83 |
Correct |
1 ms |
2772 KB |
Output is correct |
84 |
Correct |
1 ms |
2772 KB |
Output is correct |
85 |
Correct |
2 ms |
2772 KB |
Output is correct |
86 |
Correct |
27 ms |
4180 KB |
Output is correct |
87 |
Correct |
27 ms |
4180 KB |
Output is correct |
88 |
Correct |
28 ms |
4140 KB |
Output is correct |
89 |
Correct |
5 ms |
4564 KB |
Output is correct |
90 |
Correct |
5 ms |
4180 KB |
Output is correct |
91 |
Correct |
28 ms |
4180 KB |
Output is correct |
92 |
Correct |
26 ms |
4220 KB |
Output is correct |
93 |
Correct |
2 ms |
2772 KB |
Output is correct |
94 |
Correct |
70 ms |
24552 KB |
Output is correct |
95 |
Correct |
66 ms |
24464 KB |
Output is correct |
96 |
Correct |
62 ms |
24124 KB |
Output is correct |
97 |
Correct |
73 ms |
24628 KB |
Output is correct |
98 |
Correct |
78 ms |
24652 KB |
Output is correct |
99 |
Correct |
76 ms |
16352 KB |
Output is correct |
100 |
Correct |
67 ms |
16436 KB |
Output is correct |
101 |
Correct |
70 ms |
16444 KB |
Output is correct |
102 |
Correct |
63 ms |
16800 KB |
Output is correct |
103 |
Correct |
57 ms |
20100 KB |
Output is correct |
104 |
Correct |
57 ms |
20300 KB |
Output is correct |
105 |
Correct |
58 ms |
20044 KB |
Output is correct |
106 |
Correct |
73 ms |
20420 KB |
Output is correct |
107 |
Correct |
72 ms |
20304 KB |
Output is correct |
108 |
Correct |
72 ms |
24640 KB |
Output is correct |
109 |
Correct |
76 ms |
24728 KB |
Output is correct |
110 |
Correct |
76 ms |
16796 KB |
Output is correct |
111 |
Correct |
73 ms |
16844 KB |
Output is correct |
112 |
Correct |
76 ms |
16356 KB |
Output is correct |
113 |
Correct |
76 ms |
16460 KB |
Output is correct |