#include <bits/stdc++.h>
using namespace std;
const int N = 1e5 + 1;
int n, m, k, cnt;
vector<pair<int, int>> g[N];
int up[N][20], tin[N], tout[N], mars[N];
int t[N];
bool cmp(int u, int v){
return tin[u] < tin[v];
}
void dfs(int nod = 1, int p = 1){
tin[nod] = ++cnt;
up[nod][0] = p;
for(int i = 1; i < 20; i++){
up[nod][i] = up[up[nod][i - 1]][i - 1];
}
for(auto i : g[nod]){
if(i.first != p){
dfs(i.first, nod);
t[i.first] = i.second;
}
}
tout[nod] = ++cnt;
}
bool is_ancestor(int u, int v){
return tin[u] <= tin[v] && tout[u] >= tout[v];
}
int lca(int u, int v){
if(is_ancestor(u, v)) return u;
if(is_ancestor(v, u)) return v;
for(int i = 19; i >= 0; i--){
if(!is_ancestor(up[u][i], v)){
u = up[u][i];
}
}
return up[u][0];
}
void dfs1(int nod = 1, int p = 1){
//cout << nod << " " << p << '\n';
for(auto i : g[nod]){
if(i.first != p){
dfs1(i.first, nod);
mars[nod] += mars[i.first];
}
}
}
int main(){
cin >> n >> m >> k;
for(int i = 1; i < n; i++){
int u, v;
cin >> u >> v;
g[u].push_back({v, i});
g[v].push_back({u, i});
}
dfs();
for(int i = 1; i <= m; i++){
int t;
cin >> t;
vector<int> s(t + 10);
for(int i = 1; i <= t; i++){
cin >> s[i];
}
sort(s.begin() + 1, s.begin() + 1 + t, cmp);
s[t + 1] = s[1];
for(int i = 1; i <= t; i++){
int lc = lca(s[i], s[i + 1]);
mars[s[i]]++;
mars[s[i + 1]]++;
mars[lc]-=2;
}
}
dfs1();
vector<int> sol;
for(int i = 2; i <= n; i++){
if(mars[i] >= 2 * k){
sol.push_back(t[i]);
}
}
cout << sol.size() << '\n';
sort(sol.begin(), sol.end());
for(auto i : sol) cout << i << " ";
}
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
2 ms |
2580 KB |
Output is correct |
2 |
Correct |
12 ms |
4096 KB |
Output is correct |
3 |
Correct |
10 ms |
4044 KB |
Output is correct |
4 |
Correct |
2 ms |
2652 KB |
Output is correct |
5 |
Correct |
2 ms |
2644 KB |
Output is correct |
6 |
Correct |
9 ms |
4436 KB |
Output is correct |
7 |
Correct |
9 ms |
4072 KB |
Output is correct |
8 |
Correct |
8 ms |
4072 KB |
Output is correct |
9 |
Correct |
8 ms |
4080 KB |
Output is correct |
10 |
Correct |
2 ms |
2648 KB |
Output is correct |
11 |
Correct |
2 ms |
2644 KB |
Output is correct |
12 |
Correct |
2 ms |
2644 KB |
Output is correct |
13 |
Correct |
1 ms |
2644 KB |
Output is correct |
14 |
Correct |
2 ms |
2644 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
2 ms |
2580 KB |
Output is correct |
2 |
Correct |
12 ms |
4096 KB |
Output is correct |
3 |
Correct |
10 ms |
4044 KB |
Output is correct |
4 |
Correct |
2 ms |
2652 KB |
Output is correct |
5 |
Correct |
2 ms |
2644 KB |
Output is correct |
6 |
Correct |
9 ms |
4436 KB |
Output is correct |
7 |
Correct |
9 ms |
4072 KB |
Output is correct |
8 |
Correct |
8 ms |
4072 KB |
Output is correct |
9 |
Correct |
8 ms |
4080 KB |
Output is correct |
10 |
Correct |
2 ms |
2648 KB |
Output is correct |
11 |
Correct |
2 ms |
2644 KB |
Output is correct |
12 |
Correct |
2 ms |
2644 KB |
Output is correct |
13 |
Correct |
1 ms |
2644 KB |
Output is correct |
14 |
Correct |
2 ms |
2644 KB |
Output is correct |
15 |
Correct |
44 ms |
4340 KB |
Output is correct |
16 |
Correct |
37 ms |
4468 KB |
Output is correct |
17 |
Correct |
37 ms |
4444 KB |
Output is correct |
18 |
Correct |
10 ms |
4436 KB |
Output is correct |
19 |
Correct |
9 ms |
4104 KB |
Output is correct |
20 |
Correct |
44 ms |
4572 KB |
Output is correct |
21 |
Correct |
46 ms |
4492 KB |
Output is correct |
22 |
Correct |
2 ms |
2656 KB |
Output is correct |
23 |
Correct |
9 ms |
4052 KB |
Output is correct |
24 |
Correct |
9 ms |
4052 KB |
Output is correct |
25 |
Correct |
1 ms |
2644 KB |
Output is correct |
26 |
Correct |
1 ms |
2644 KB |
Output is correct |
27 |
Correct |
10 ms |
4436 KB |
Output is correct |
28 |
Correct |
9 ms |
4096 KB |
Output is correct |
29 |
Correct |
8 ms |
4080 KB |
Output is correct |
30 |
Correct |
19 ms |
4052 KB |
Output is correct |
31 |
Correct |
2 ms |
2644 KB |
Output is correct |
32 |
Correct |
2 ms |
2656 KB |
Output is correct |
33 |
Correct |
2 ms |
2660 KB |
Output is correct |
34 |
Correct |
1 ms |
2644 KB |
Output is correct |
35 |
Correct |
2 ms |
2656 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
118 ms |
25672 KB |
Output is correct |
2 |
Correct |
2 ms |
2772 KB |
Output is correct |
3 |
Correct |
146 ms |
25340 KB |
Output is correct |
4 |
Correct |
110 ms |
24676 KB |
Output is correct |
5 |
Correct |
117 ms |
25672 KB |
Output is correct |
6 |
Correct |
130 ms |
26000 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
126 ms |
21264 KB |
Output is correct |
2 |
Correct |
141 ms |
17944 KB |
Output is correct |
3 |
Correct |
150 ms |
17552 KB |
Output is correct |
4 |
Correct |
149 ms |
17540 KB |
Output is correct |
5 |
Correct |
151 ms |
17536 KB |
Output is correct |
6 |
Correct |
131 ms |
21488 KB |
Output is correct |
7 |
Correct |
128 ms |
21368 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
126 ms |
21264 KB |
Output is correct |
2 |
Correct |
141 ms |
17944 KB |
Output is correct |
3 |
Correct |
150 ms |
17552 KB |
Output is correct |
4 |
Correct |
149 ms |
17540 KB |
Output is correct |
5 |
Correct |
151 ms |
17536 KB |
Output is correct |
6 |
Correct |
131 ms |
21488 KB |
Output is correct |
7 |
Correct |
128 ms |
21368 KB |
Output is correct |
8 |
Correct |
141 ms |
21444 KB |
Output is correct |
9 |
Correct |
148 ms |
21452 KB |
Output is correct |
10 |
Correct |
111 ms |
25784 KB |
Output is correct |
11 |
Correct |
112 ms |
25736 KB |
Output is correct |
12 |
Correct |
118 ms |
17228 KB |
Output is correct |
13 |
Correct |
118 ms |
17240 KB |
Output is correct |
14 |
Correct |
133 ms |
17440 KB |
Output is correct |
15 |
Correct |
171 ms |
17356 KB |
Output is correct |
16 |
Correct |
149 ms |
17556 KB |
Output is correct |
17 |
Correct |
157 ms |
17432 KB |
Output is correct |
18 |
Correct |
146 ms |
17540 KB |
Output is correct |
19 |
Correct |
157 ms |
17836 KB |
Output is correct |
20 |
Correct |
129 ms |
21712 KB |
Output is correct |
21 |
Correct |
129 ms |
21780 KB |
Output is correct |
22 |
Correct |
124 ms |
21728 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
2 ms |
2580 KB |
Output is correct |
2 |
Correct |
12 ms |
4096 KB |
Output is correct |
3 |
Correct |
10 ms |
4044 KB |
Output is correct |
4 |
Correct |
2 ms |
2652 KB |
Output is correct |
5 |
Correct |
2 ms |
2644 KB |
Output is correct |
6 |
Correct |
9 ms |
4436 KB |
Output is correct |
7 |
Correct |
9 ms |
4072 KB |
Output is correct |
8 |
Correct |
8 ms |
4072 KB |
Output is correct |
9 |
Correct |
8 ms |
4080 KB |
Output is correct |
10 |
Correct |
2 ms |
2648 KB |
Output is correct |
11 |
Correct |
2 ms |
2644 KB |
Output is correct |
12 |
Correct |
2 ms |
2644 KB |
Output is correct |
13 |
Correct |
1 ms |
2644 KB |
Output is correct |
14 |
Correct |
2 ms |
2644 KB |
Output is correct |
15 |
Correct |
44 ms |
4340 KB |
Output is correct |
16 |
Correct |
37 ms |
4468 KB |
Output is correct |
17 |
Correct |
37 ms |
4444 KB |
Output is correct |
18 |
Correct |
10 ms |
4436 KB |
Output is correct |
19 |
Correct |
9 ms |
4104 KB |
Output is correct |
20 |
Correct |
44 ms |
4572 KB |
Output is correct |
21 |
Correct |
46 ms |
4492 KB |
Output is correct |
22 |
Correct |
2 ms |
2656 KB |
Output is correct |
23 |
Correct |
9 ms |
4052 KB |
Output is correct |
24 |
Correct |
9 ms |
4052 KB |
Output is correct |
25 |
Correct |
1 ms |
2644 KB |
Output is correct |
26 |
Correct |
1 ms |
2644 KB |
Output is correct |
27 |
Correct |
10 ms |
4436 KB |
Output is correct |
28 |
Correct |
9 ms |
4096 KB |
Output is correct |
29 |
Correct |
8 ms |
4080 KB |
Output is correct |
30 |
Correct |
19 ms |
4052 KB |
Output is correct |
31 |
Correct |
2 ms |
2644 KB |
Output is correct |
32 |
Correct |
2 ms |
2656 KB |
Output is correct |
33 |
Correct |
2 ms |
2660 KB |
Output is correct |
34 |
Correct |
1 ms |
2644 KB |
Output is correct |
35 |
Correct |
2 ms |
2656 KB |
Output is correct |
36 |
Correct |
118 ms |
25672 KB |
Output is correct |
37 |
Correct |
2 ms |
2772 KB |
Output is correct |
38 |
Correct |
146 ms |
25340 KB |
Output is correct |
39 |
Correct |
110 ms |
24676 KB |
Output is correct |
40 |
Correct |
117 ms |
25672 KB |
Output is correct |
41 |
Correct |
130 ms |
26000 KB |
Output is correct |
42 |
Correct |
126 ms |
21264 KB |
Output is correct |
43 |
Correct |
141 ms |
17944 KB |
Output is correct |
44 |
Correct |
150 ms |
17552 KB |
Output is correct |
45 |
Correct |
149 ms |
17540 KB |
Output is correct |
46 |
Correct |
151 ms |
17536 KB |
Output is correct |
47 |
Correct |
131 ms |
21488 KB |
Output is correct |
48 |
Correct |
128 ms |
21368 KB |
Output is correct |
49 |
Correct |
141 ms |
21444 KB |
Output is correct |
50 |
Correct |
148 ms |
21452 KB |
Output is correct |
51 |
Correct |
111 ms |
25784 KB |
Output is correct |
52 |
Correct |
112 ms |
25736 KB |
Output is correct |
53 |
Correct |
118 ms |
17228 KB |
Output is correct |
54 |
Correct |
118 ms |
17240 KB |
Output is correct |
55 |
Correct |
133 ms |
17440 KB |
Output is correct |
56 |
Correct |
171 ms |
17356 KB |
Output is correct |
57 |
Correct |
149 ms |
17556 KB |
Output is correct |
58 |
Correct |
157 ms |
17432 KB |
Output is correct |
59 |
Correct |
146 ms |
17540 KB |
Output is correct |
60 |
Correct |
157 ms |
17836 KB |
Output is correct |
61 |
Correct |
129 ms |
21712 KB |
Output is correct |
62 |
Correct |
129 ms |
21780 KB |
Output is correct |
63 |
Correct |
124 ms |
21728 KB |
Output is correct |
64 |
Correct |
142 ms |
21648 KB |
Output is correct |
65 |
Correct |
197 ms |
17568 KB |
Output is correct |
66 |
Correct |
142 ms |
17488 KB |
Output is correct |
67 |
Correct |
143 ms |
17416 KB |
Output is correct |
68 |
Correct |
105 ms |
17152 KB |
Output is correct |
69 |
Correct |
110 ms |
17244 KB |
Output is correct |
70 |
Correct |
137 ms |
21960 KB |
Output is correct |
71 |
Correct |
133 ms |
21252 KB |
Output is correct |
72 |
Correct |
2 ms |
2660 KB |
Output is correct |
73 |
Correct |
12 ms |
4064 KB |
Output is correct |
74 |
Correct |
11 ms |
4180 KB |
Output is correct |
75 |
Correct |
1 ms |
2644 KB |
Output is correct |
76 |
Correct |
2 ms |
2652 KB |
Output is correct |
77 |
Correct |
10 ms |
4456 KB |
Output is correct |
78 |
Correct |
9 ms |
4156 KB |
Output is correct |
79 |
Correct |
8 ms |
4080 KB |
Output is correct |
80 |
Correct |
9 ms |
4096 KB |
Output is correct |
81 |
Correct |
2 ms |
2644 KB |
Output is correct |
82 |
Correct |
2 ms |
2644 KB |
Output is correct |
83 |
Correct |
2 ms |
2644 KB |
Output is correct |
84 |
Correct |
2 ms |
2644 KB |
Output is correct |
85 |
Correct |
2 ms |
2644 KB |
Output is correct |
86 |
Correct |
37 ms |
4356 KB |
Output is correct |
87 |
Correct |
42 ms |
4432 KB |
Output is correct |
88 |
Correct |
38 ms |
4432 KB |
Output is correct |
89 |
Correct |
15 ms |
4508 KB |
Output is correct |
90 |
Correct |
13 ms |
4092 KB |
Output is correct |
91 |
Correct |
45 ms |
4624 KB |
Output is correct |
92 |
Correct |
48 ms |
4508 KB |
Output is correct |
93 |
Correct |
2 ms |
2656 KB |
Output is correct |
94 |
Correct |
118 ms |
25680 KB |
Output is correct |
95 |
Correct |
115 ms |
25352 KB |
Output is correct |
96 |
Correct |
118 ms |
24684 KB |
Output is correct |
97 |
Correct |
117 ms |
25644 KB |
Output is correct |
98 |
Correct |
129 ms |
26032 KB |
Output is correct |
99 |
Correct |
167 ms |
17672 KB |
Output is correct |
100 |
Correct |
150 ms |
17544 KB |
Output is correct |
101 |
Correct |
166 ms |
17484 KB |
Output is correct |
102 |
Correct |
145 ms |
17940 KB |
Output is correct |
103 |
Correct |
127 ms |
21452 KB |
Output is correct |
104 |
Correct |
130 ms |
21696 KB |
Output is correct |
105 |
Correct |
139 ms |
21336 KB |
Output is correct |
106 |
Correct |
138 ms |
21568 KB |
Output is correct |
107 |
Correct |
183 ms |
21440 KB |
Output is correct |
108 |
Correct |
111 ms |
25700 KB |
Output is correct |
109 |
Correct |
112 ms |
25728 KB |
Output is correct |
110 |
Correct |
145 ms |
17292 KB |
Output is correct |
111 |
Correct |
118 ms |
17272 KB |
Output is correct |
112 |
Correct |
144 ms |
17376 KB |
Output is correct |
113 |
Correct |
140 ms |
17368 KB |
Output is correct |