#include "bits/stdc++.h"
using namespace std;
#define ll long long
#define all(v) v.begin(), v.end()
#define rall(v) v.rbegin(),v.rend()
#define pb push_back
#define sz(a) (int)a.size()
const int N = 1e5 + 5, K = 20;
vector<int> adj[N];
int jump[N][K], depth[N], tin[N], tt = 0, cnt[N];
void get_parents(int u, int par) {
jump[u][0] = par;
tin[u] = tt++;
for(int v: adj[u]) {
if(v == par) continue;
depth[v] = depth[u] + 1;
get_parents(v, u);
}
}
int lca(int a, int b) {
if(depth[a] < depth[b]) swap(a, b);
for(int i = K - 1; i >= 0; --i) {
if(depth[jump[a][i]] >= depth[b]) a = jump[a][i];
}
if(a == b) return a;
for(int i = K - 1; i >= 0; --i) {
if(jump[a][i] != jump[b][i]) {
a = jump[a][i];
b = jump[b][i];
}
}
return jump[a][0];
}
void dfs(int u, int par) {
for(int v: adj[u]) {
if(v == par) continue;
dfs(v, u);
cnt[u] += cnt[v];
}
}
void solve() {
int n, m, k; cin >> n >> m >> k;
map<pair<int, int>, int> mp;
for(int i = 0; i < n - 1; ++i) {
int u, v; cin >> u >> v; --u, --v;
adj[u].pb(v);
adj[v].pb(u);
mp[{u, v}] = mp[{v, u}] = i;
}
get_parents(0, 0);
for(int j = 1; j < K; ++j) {
for(int i = 0; i < n; ++i) {
jump[i][j] = jump[jump[i][j - 1]][j - 1];
}
}
while(m--) {
int len; cin >> len;
vector<int> a(len);
for(int i = 0; i < len; ++i) {
cin >> a[i]; --a[i];
}
sort(all(a), [&](int i, int j){return tin[i] < tin[j];});
vector<int> nodes = a;
for(int i = 0; i + 1 < len; ++i) {
nodes.pb(lca(a[i], a[i + 1]));
}
sort(all(nodes), [&](int i, int j){return tin[i] < tin[j];});
nodes.erase(unique(all(nodes)), nodes.end());
stack<int> st;
st.push(nodes[0]);
for(int i = 1; i < sz(nodes); ++i) {
while(lca(st.top(), nodes[i]) != st.top()) st.pop();
++cnt[nodes[i]];
--cnt[st.top()];
st.push(nodes[i]);
}
}
dfs(0, -1);
vector<int> v;
for(int i = 0; i < n; ++i) {
if(cnt[i] >= k) {
v.pb(mp[{i, jump[i][0]}]);
}
}
sort(all(v));
cout << sz(v) << "\n";
for(auto x: v) cout << x + 1 << " ";
}
int32_t main() {
ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
int t = 1;
//cin >> t;
while(t--) {
solve();
}
}
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1 ms |
2644 KB |
Output is correct |
2 |
Correct |
9 ms |
5252 KB |
Output is correct |
3 |
Correct |
9 ms |
5252 KB |
Output is correct |
4 |
Correct |
1 ms |
2680 KB |
Output is correct |
5 |
Correct |
2 ms |
2644 KB |
Output is correct |
6 |
Correct |
9 ms |
5716 KB |
Output is correct |
7 |
Correct |
9 ms |
5288 KB |
Output is correct |
8 |
Correct |
8 ms |
5196 KB |
Output is correct |
9 |
Correct |
8 ms |
5252 KB |
Output is correct |
10 |
Correct |
2 ms |
2644 KB |
Output is correct |
11 |
Correct |
2 ms |
2644 KB |
Output is correct |
12 |
Correct |
1 ms |
2644 KB |
Output is correct |
13 |
Correct |
1 ms |
2672 KB |
Output is correct |
14 |
Correct |
1 ms |
2644 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1 ms |
2644 KB |
Output is correct |
2 |
Correct |
9 ms |
5252 KB |
Output is correct |
3 |
Correct |
9 ms |
5252 KB |
Output is correct |
4 |
Correct |
1 ms |
2680 KB |
Output is correct |
5 |
Correct |
2 ms |
2644 KB |
Output is correct |
6 |
Correct |
9 ms |
5716 KB |
Output is correct |
7 |
Correct |
9 ms |
5288 KB |
Output is correct |
8 |
Correct |
8 ms |
5196 KB |
Output is correct |
9 |
Correct |
8 ms |
5252 KB |
Output is correct |
10 |
Correct |
2 ms |
2644 KB |
Output is correct |
11 |
Correct |
2 ms |
2644 KB |
Output is correct |
12 |
Correct |
1 ms |
2644 KB |
Output is correct |
13 |
Correct |
1 ms |
2672 KB |
Output is correct |
14 |
Correct |
1 ms |
2644 KB |
Output is correct |
15 |
Correct |
54 ms |
5608 KB |
Output is correct |
16 |
Correct |
55 ms |
5616 KB |
Output is correct |
17 |
Correct |
54 ms |
5604 KB |
Output is correct |
18 |
Correct |
9 ms |
5716 KB |
Output is correct |
19 |
Correct |
9 ms |
5280 KB |
Output is correct |
20 |
Correct |
52 ms |
5728 KB |
Output is correct |
21 |
Correct |
54 ms |
5696 KB |
Output is correct |
22 |
Correct |
2 ms |
2644 KB |
Output is correct |
23 |
Correct |
10 ms |
5252 KB |
Output is correct |
24 |
Correct |
10 ms |
5152 KB |
Output is correct |
25 |
Correct |
2 ms |
2644 KB |
Output is correct |
26 |
Correct |
2 ms |
2672 KB |
Output is correct |
27 |
Correct |
9 ms |
5716 KB |
Output is correct |
28 |
Correct |
9 ms |
5240 KB |
Output is correct |
29 |
Correct |
8 ms |
5180 KB |
Output is correct |
30 |
Correct |
9 ms |
5204 KB |
Output is correct |
31 |
Correct |
2 ms |
2644 KB |
Output is correct |
32 |
Correct |
2 ms |
2644 KB |
Output is correct |
33 |
Correct |
2 ms |
2644 KB |
Output is correct |
34 |
Correct |
1 ms |
2676 KB |
Output is correct |
35 |
Correct |
2 ms |
2644 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
114 ms |
37820 KB |
Output is correct |
2 |
Correct |
1 ms |
2644 KB |
Output is correct |
3 |
Correct |
110 ms |
37488 KB |
Output is correct |
4 |
Correct |
100 ms |
36948 KB |
Output is correct |
5 |
Correct |
123 ms |
37820 KB |
Output is correct |
6 |
Correct |
132 ms |
38156 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
122 ms |
33004 KB |
Output is correct |
2 |
Correct |
175 ms |
29600 KB |
Output is correct |
3 |
Correct |
157 ms |
29208 KB |
Output is correct |
4 |
Correct |
161 ms |
29208 KB |
Output is correct |
5 |
Correct |
159 ms |
29184 KB |
Output is correct |
6 |
Correct |
139 ms |
33204 KB |
Output is correct |
7 |
Correct |
118 ms |
33124 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
122 ms |
33004 KB |
Output is correct |
2 |
Correct |
175 ms |
29600 KB |
Output is correct |
3 |
Correct |
157 ms |
29208 KB |
Output is correct |
4 |
Correct |
161 ms |
29208 KB |
Output is correct |
5 |
Correct |
159 ms |
29184 KB |
Output is correct |
6 |
Correct |
139 ms |
33204 KB |
Output is correct |
7 |
Correct |
118 ms |
33124 KB |
Output is correct |
8 |
Correct |
162 ms |
33220 KB |
Output is correct |
9 |
Correct |
153 ms |
33148 KB |
Output is correct |
10 |
Correct |
130 ms |
37888 KB |
Output is correct |
11 |
Correct |
124 ms |
37828 KB |
Output is correct |
12 |
Correct |
122 ms |
28984 KB |
Output is correct |
13 |
Correct |
132 ms |
29112 KB |
Output is correct |
14 |
Correct |
190 ms |
29072 KB |
Output is correct |
15 |
Correct |
171 ms |
29012 KB |
Output is correct |
16 |
Correct |
157 ms |
29204 KB |
Output is correct |
17 |
Correct |
174 ms |
29208 KB |
Output is correct |
18 |
Correct |
149 ms |
29204 KB |
Output is correct |
19 |
Correct |
145 ms |
29580 KB |
Output is correct |
20 |
Correct |
125 ms |
33452 KB |
Output is correct |
21 |
Correct |
134 ms |
33508 KB |
Output is correct |
22 |
Correct |
126 ms |
33388 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1 ms |
2644 KB |
Output is correct |
2 |
Correct |
9 ms |
5252 KB |
Output is correct |
3 |
Correct |
9 ms |
5252 KB |
Output is correct |
4 |
Correct |
1 ms |
2680 KB |
Output is correct |
5 |
Correct |
2 ms |
2644 KB |
Output is correct |
6 |
Correct |
9 ms |
5716 KB |
Output is correct |
7 |
Correct |
9 ms |
5288 KB |
Output is correct |
8 |
Correct |
8 ms |
5196 KB |
Output is correct |
9 |
Correct |
8 ms |
5252 KB |
Output is correct |
10 |
Correct |
2 ms |
2644 KB |
Output is correct |
11 |
Correct |
2 ms |
2644 KB |
Output is correct |
12 |
Correct |
1 ms |
2644 KB |
Output is correct |
13 |
Correct |
1 ms |
2672 KB |
Output is correct |
14 |
Correct |
1 ms |
2644 KB |
Output is correct |
15 |
Correct |
54 ms |
5608 KB |
Output is correct |
16 |
Correct |
55 ms |
5616 KB |
Output is correct |
17 |
Correct |
54 ms |
5604 KB |
Output is correct |
18 |
Correct |
9 ms |
5716 KB |
Output is correct |
19 |
Correct |
9 ms |
5280 KB |
Output is correct |
20 |
Correct |
52 ms |
5728 KB |
Output is correct |
21 |
Correct |
54 ms |
5696 KB |
Output is correct |
22 |
Correct |
2 ms |
2644 KB |
Output is correct |
23 |
Correct |
10 ms |
5252 KB |
Output is correct |
24 |
Correct |
10 ms |
5152 KB |
Output is correct |
25 |
Correct |
2 ms |
2644 KB |
Output is correct |
26 |
Correct |
2 ms |
2672 KB |
Output is correct |
27 |
Correct |
9 ms |
5716 KB |
Output is correct |
28 |
Correct |
9 ms |
5240 KB |
Output is correct |
29 |
Correct |
8 ms |
5180 KB |
Output is correct |
30 |
Correct |
9 ms |
5204 KB |
Output is correct |
31 |
Correct |
2 ms |
2644 KB |
Output is correct |
32 |
Correct |
2 ms |
2644 KB |
Output is correct |
33 |
Correct |
2 ms |
2644 KB |
Output is correct |
34 |
Correct |
1 ms |
2676 KB |
Output is correct |
35 |
Correct |
2 ms |
2644 KB |
Output is correct |
36 |
Correct |
114 ms |
37820 KB |
Output is correct |
37 |
Correct |
1 ms |
2644 KB |
Output is correct |
38 |
Correct |
110 ms |
37488 KB |
Output is correct |
39 |
Correct |
100 ms |
36948 KB |
Output is correct |
40 |
Correct |
123 ms |
37820 KB |
Output is correct |
41 |
Correct |
132 ms |
38156 KB |
Output is correct |
42 |
Correct |
122 ms |
33004 KB |
Output is correct |
43 |
Correct |
175 ms |
29600 KB |
Output is correct |
44 |
Correct |
157 ms |
29208 KB |
Output is correct |
45 |
Correct |
161 ms |
29208 KB |
Output is correct |
46 |
Correct |
159 ms |
29184 KB |
Output is correct |
47 |
Correct |
139 ms |
33204 KB |
Output is correct |
48 |
Correct |
118 ms |
33124 KB |
Output is correct |
49 |
Correct |
162 ms |
33220 KB |
Output is correct |
50 |
Correct |
153 ms |
33148 KB |
Output is correct |
51 |
Correct |
130 ms |
37888 KB |
Output is correct |
52 |
Correct |
124 ms |
37828 KB |
Output is correct |
53 |
Correct |
122 ms |
28984 KB |
Output is correct |
54 |
Correct |
132 ms |
29112 KB |
Output is correct |
55 |
Correct |
190 ms |
29072 KB |
Output is correct |
56 |
Correct |
171 ms |
29012 KB |
Output is correct |
57 |
Correct |
157 ms |
29204 KB |
Output is correct |
58 |
Correct |
174 ms |
29208 KB |
Output is correct |
59 |
Correct |
149 ms |
29204 KB |
Output is correct |
60 |
Correct |
145 ms |
29580 KB |
Output is correct |
61 |
Correct |
125 ms |
33452 KB |
Output is correct |
62 |
Correct |
134 ms |
33508 KB |
Output is correct |
63 |
Correct |
126 ms |
33388 KB |
Output is correct |
64 |
Correct |
133 ms |
33352 KB |
Output is correct |
65 |
Correct |
155 ms |
29220 KB |
Output is correct |
66 |
Correct |
210 ms |
29084 KB |
Output is correct |
67 |
Correct |
177 ms |
29064 KB |
Output is correct |
68 |
Correct |
124 ms |
28996 KB |
Output is correct |
69 |
Correct |
155 ms |
28948 KB |
Output is correct |
70 |
Correct |
130 ms |
33644 KB |
Output is correct |
71 |
Correct |
145 ms |
33008 KB |
Output is correct |
72 |
Correct |
2 ms |
2644 KB |
Output is correct |
73 |
Correct |
9 ms |
5204 KB |
Output is correct |
74 |
Correct |
10 ms |
5204 KB |
Output is correct |
75 |
Correct |
1 ms |
2676 KB |
Output is correct |
76 |
Correct |
1 ms |
2644 KB |
Output is correct |
77 |
Correct |
10 ms |
5624 KB |
Output is correct |
78 |
Correct |
9 ms |
5360 KB |
Output is correct |
79 |
Correct |
7 ms |
5204 KB |
Output is correct |
80 |
Correct |
8 ms |
5204 KB |
Output is correct |
81 |
Correct |
2 ms |
2644 KB |
Output is correct |
82 |
Correct |
1 ms |
2644 KB |
Output is correct |
83 |
Correct |
2 ms |
2644 KB |
Output is correct |
84 |
Correct |
1 ms |
2672 KB |
Output is correct |
85 |
Correct |
2 ms |
2644 KB |
Output is correct |
86 |
Correct |
56 ms |
5608 KB |
Output is correct |
87 |
Correct |
55 ms |
5660 KB |
Output is correct |
88 |
Correct |
54 ms |
5608 KB |
Output is correct |
89 |
Correct |
9 ms |
5588 KB |
Output is correct |
90 |
Correct |
9 ms |
5332 KB |
Output is correct |
91 |
Correct |
51 ms |
5800 KB |
Output is correct |
92 |
Correct |
54 ms |
5696 KB |
Output is correct |
93 |
Correct |
1 ms |
2644 KB |
Output is correct |
94 |
Correct |
126 ms |
37768 KB |
Output is correct |
95 |
Correct |
113 ms |
37484 KB |
Output is correct |
96 |
Correct |
105 ms |
36884 KB |
Output is correct |
97 |
Correct |
130 ms |
37820 KB |
Output is correct |
98 |
Correct |
132 ms |
38344 KB |
Output is correct |
99 |
Correct |
150 ms |
29160 KB |
Output is correct |
100 |
Correct |
147 ms |
29132 KB |
Output is correct |
101 |
Correct |
148 ms |
29116 KB |
Output is correct |
102 |
Correct |
179 ms |
29536 KB |
Output is correct |
103 |
Correct |
120 ms |
33080 KB |
Output is correct |
104 |
Correct |
122 ms |
33496 KB |
Output is correct |
105 |
Correct |
117 ms |
33092 KB |
Output is correct |
106 |
Correct |
165 ms |
33284 KB |
Output is correct |
107 |
Correct |
143 ms |
33084 KB |
Output is correct |
108 |
Correct |
124 ms |
37900 KB |
Output is correct |
109 |
Correct |
123 ms |
37896 KB |
Output is correct |
110 |
Correct |
125 ms |
29208 KB |
Output is correct |
111 |
Correct |
121 ms |
29104 KB |
Output is correct |
112 |
Correct |
177 ms |
29076 KB |
Output is correct |
113 |
Correct |
177 ms |
29064 KB |
Output is correct |