#ifndef Local
#pragma GCC optimize("O3,unroll-loops")
const int lim=1e5+100;
#else
const int lim=1e5+3;
#endif
const int lglim=17;
#include "bits/stdc++.h"
using namespace std;
//#define int int64_t
#define pb push_back
const int mod=998244353;
//const int mod=(1ll<<61)-1;
using pii=pair<int,int>;
int n,m,k;
int tin[lim],tout[lim],dep[lim],tt=0;
int lift[lglim][lim];
vector<pii>v[lim];
int pare[lim];
inline void tour(int node,int par){
tin[node]=tt++;
dep[node]=dep[par]-1;
lift[0][node]=par;
int i=1;
while(i<lglim&&(lift[i][node]=lift[i-1][lift[i-1][node]]))i++;
for(auto [j,c]:v[node]){
if(j^par){
pare[j]=c;
tour(j,node);
}
}
tout[node]=tt-1;
}
int lgll[lim];
inline int lca(int x,int y){
if(dep[y]<dep[x])swap(x,y);
int dif=dep[y]-dep[x];
while(dif){
int lll=lgll[dif&-dif];
dif-=1<<lll;
x=lift[lll][x];
}
if(x==y)return x;
for(int i=lgll[-dep[x]];0<=i;i--){
if(lift[i][x]^lift[i][y]){
x=lift[i][x];
y=lift[i][y];
}
}
return lift[0][x];
}
int val[lim];
bool can[lim];
vector<int>ans;
inline int dfs(int node,int par){
for(auto [j,c]:v[node]){
if(j^par){
val[node]+=dfs(j,node);
}
}
if(2*k<=val[node]){
can[pare[node]]=1;
}
return val[node];
}
inline void solve(){
lgll[1]=0;
for(int i=2;i<lim;i++){
lgll[i]=lgll[i/2]+1;
}
cin>>n>>m>>k;
for(int i=1;i<=n-1;i++){
int x,y;
cin>>x>>y;
v[x].pb({y,i});
v[y].pb({x,i});
}
tour(1,0);
int inds[n+1];
for(int r=0;r<m;r++){
int s;
cin>>s;
for(int i=0;i<s;i++){
cin>>inds[i];
}
sort(inds,inds+s,[&](int i,int j) -> bool {
return tin[i]<tin[j];
});
inds[s]=inds[0];
for(int i=0;i<s;i++){
val[inds[i]]++;
val[inds[i+1]]++;
val[lca(inds[i],inds[i+1])]-=2;
}
}
dfs(1,0);
int cnt=0;
for(int i=0;i<n;i++){
if(can[i])cnt++;
}
cout<<cnt<<"\n";
for(int i=0;i<n;i++)if(can[i])cout<<i<<" ";
}
signed main(){
ios_base::sync_with_stdio(0);
cin.tie(0);cout.tie(0);
#ifdef Local
freopen(".in","r",stdin);
freopen(".out","w",stdout);
#else
#endif
int t=1;
//cin>>t;
while (t--)
{
solve();
}
}
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1 ms |
6488 KB |
Output is correct |
2 |
Correct |
5 ms |
7016 KB |
Output is correct |
3 |
Correct |
4 ms |
7004 KB |
Output is correct |
4 |
Correct |
1 ms |
6492 KB |
Output is correct |
5 |
Correct |
2 ms |
6492 KB |
Output is correct |
6 |
Correct |
4 ms |
9304 KB |
Output is correct |
7 |
Correct |
5 ms |
9052 KB |
Output is correct |
8 |
Correct |
3 ms |
7004 KB |
Output is correct |
9 |
Correct |
3 ms |
7248 KB |
Output is correct |
10 |
Correct |
2 ms |
6492 KB |
Output is correct |
11 |
Correct |
2 ms |
6492 KB |
Output is correct |
12 |
Correct |
1 ms |
6492 KB |
Output is correct |
13 |
Correct |
2 ms |
6492 KB |
Output is correct |
14 |
Correct |
2 ms |
6492 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1 ms |
6488 KB |
Output is correct |
2 |
Correct |
5 ms |
7016 KB |
Output is correct |
3 |
Correct |
4 ms |
7004 KB |
Output is correct |
4 |
Correct |
1 ms |
6492 KB |
Output is correct |
5 |
Correct |
2 ms |
6492 KB |
Output is correct |
6 |
Correct |
4 ms |
9304 KB |
Output is correct |
7 |
Correct |
5 ms |
9052 KB |
Output is correct |
8 |
Correct |
3 ms |
7004 KB |
Output is correct |
9 |
Correct |
3 ms |
7248 KB |
Output is correct |
10 |
Correct |
2 ms |
6492 KB |
Output is correct |
11 |
Correct |
2 ms |
6492 KB |
Output is correct |
12 |
Correct |
1 ms |
6492 KB |
Output is correct |
13 |
Correct |
2 ms |
6492 KB |
Output is correct |
14 |
Correct |
2 ms |
6492 KB |
Output is correct |
15 |
Correct |
12 ms |
7004 KB |
Output is correct |
16 |
Correct |
12 ms |
7004 KB |
Output is correct |
17 |
Correct |
17 ms |
7004 KB |
Output is correct |
18 |
Correct |
5 ms |
9308 KB |
Output is correct |
19 |
Correct |
5 ms |
9308 KB |
Output is correct |
20 |
Correct |
10 ms |
5388 KB |
Output is correct |
21 |
Correct |
12 ms |
7004 KB |
Output is correct |
22 |
Correct |
1 ms |
6492 KB |
Output is correct |
23 |
Correct |
4 ms |
7028 KB |
Output is correct |
24 |
Correct |
4 ms |
7004 KB |
Output is correct |
25 |
Correct |
1 ms |
6492 KB |
Output is correct |
26 |
Correct |
1 ms |
6492 KB |
Output is correct |
27 |
Correct |
4 ms |
9308 KB |
Output is correct |
28 |
Correct |
4 ms |
9052 KB |
Output is correct |
29 |
Correct |
3 ms |
7004 KB |
Output is correct |
30 |
Correct |
3 ms |
7004 KB |
Output is correct |
31 |
Correct |
1 ms |
6492 KB |
Output is correct |
32 |
Correct |
2 ms |
6588 KB |
Output is correct |
33 |
Correct |
1 ms |
6492 KB |
Output is correct |
34 |
Correct |
1 ms |
6492 KB |
Output is correct |
35 |
Correct |
1 ms |
6488 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
50 ms |
18848 KB |
Output is correct |
2 |
Correct |
2 ms |
6488 KB |
Output is correct |
3 |
Correct |
49 ms |
18520 KB |
Output is correct |
4 |
Correct |
47 ms |
18264 KB |
Output is correct |
5 |
Correct |
42 ms |
18936 KB |
Output is correct |
6 |
Correct |
44 ms |
18964 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
42 ms |
17236 KB |
Output is correct |
2 |
Correct |
47 ms |
14932 KB |
Output is correct |
3 |
Correct |
40 ms |
11864 KB |
Output is correct |
4 |
Correct |
46 ms |
11976 KB |
Output is correct |
5 |
Correct |
39 ms |
11980 KB |
Output is correct |
6 |
Correct |
41 ms |
17236 KB |
Output is correct |
7 |
Correct |
43 ms |
17128 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
42 ms |
17236 KB |
Output is correct |
2 |
Correct |
47 ms |
14932 KB |
Output is correct |
3 |
Correct |
40 ms |
11864 KB |
Output is correct |
4 |
Correct |
46 ms |
11976 KB |
Output is correct |
5 |
Correct |
39 ms |
11980 KB |
Output is correct |
6 |
Correct |
41 ms |
17236 KB |
Output is correct |
7 |
Correct |
43 ms |
17128 KB |
Output is correct |
8 |
Correct |
57 ms |
17236 KB |
Output is correct |
9 |
Correct |
44 ms |
17232 KB |
Output is correct |
10 |
Correct |
40 ms |
19048 KB |
Output is correct |
11 |
Correct |
40 ms |
19028 KB |
Output is correct |
12 |
Correct |
30 ms |
12124 KB |
Output is correct |
13 |
Correct |
29 ms |
12120 KB |
Output is correct |
14 |
Correct |
44 ms |
11876 KB |
Output is correct |
15 |
Correct |
41 ms |
11864 KB |
Output is correct |
16 |
Correct |
41 ms |
11864 KB |
Output is correct |
17 |
Correct |
40 ms |
11752 KB |
Output is correct |
18 |
Correct |
45 ms |
11856 KB |
Output is correct |
19 |
Correct |
60 ms |
14684 KB |
Output is correct |
20 |
Correct |
42 ms |
17388 KB |
Output is correct |
21 |
Correct |
44 ms |
17492 KB |
Output is correct |
22 |
Correct |
53 ms |
17232 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1 ms |
6488 KB |
Output is correct |
2 |
Correct |
5 ms |
7016 KB |
Output is correct |
3 |
Correct |
4 ms |
7004 KB |
Output is correct |
4 |
Correct |
1 ms |
6492 KB |
Output is correct |
5 |
Correct |
2 ms |
6492 KB |
Output is correct |
6 |
Correct |
4 ms |
9304 KB |
Output is correct |
7 |
Correct |
5 ms |
9052 KB |
Output is correct |
8 |
Correct |
3 ms |
7004 KB |
Output is correct |
9 |
Correct |
3 ms |
7248 KB |
Output is correct |
10 |
Correct |
2 ms |
6492 KB |
Output is correct |
11 |
Correct |
2 ms |
6492 KB |
Output is correct |
12 |
Correct |
1 ms |
6492 KB |
Output is correct |
13 |
Correct |
2 ms |
6492 KB |
Output is correct |
14 |
Correct |
2 ms |
6492 KB |
Output is correct |
15 |
Correct |
12 ms |
7004 KB |
Output is correct |
16 |
Correct |
12 ms |
7004 KB |
Output is correct |
17 |
Correct |
17 ms |
7004 KB |
Output is correct |
18 |
Correct |
5 ms |
9308 KB |
Output is correct |
19 |
Correct |
5 ms |
9308 KB |
Output is correct |
20 |
Correct |
10 ms |
5388 KB |
Output is correct |
21 |
Correct |
12 ms |
7004 KB |
Output is correct |
22 |
Correct |
1 ms |
6492 KB |
Output is correct |
23 |
Correct |
4 ms |
7028 KB |
Output is correct |
24 |
Correct |
4 ms |
7004 KB |
Output is correct |
25 |
Correct |
1 ms |
6492 KB |
Output is correct |
26 |
Correct |
1 ms |
6492 KB |
Output is correct |
27 |
Correct |
4 ms |
9308 KB |
Output is correct |
28 |
Correct |
4 ms |
9052 KB |
Output is correct |
29 |
Correct |
3 ms |
7004 KB |
Output is correct |
30 |
Correct |
3 ms |
7004 KB |
Output is correct |
31 |
Correct |
1 ms |
6492 KB |
Output is correct |
32 |
Correct |
2 ms |
6588 KB |
Output is correct |
33 |
Correct |
1 ms |
6492 KB |
Output is correct |
34 |
Correct |
1 ms |
6492 KB |
Output is correct |
35 |
Correct |
1 ms |
6488 KB |
Output is correct |
36 |
Correct |
50 ms |
18848 KB |
Output is correct |
37 |
Correct |
2 ms |
6488 KB |
Output is correct |
38 |
Correct |
49 ms |
18520 KB |
Output is correct |
39 |
Correct |
47 ms |
18264 KB |
Output is correct |
40 |
Correct |
42 ms |
18936 KB |
Output is correct |
41 |
Correct |
44 ms |
18964 KB |
Output is correct |
42 |
Correct |
42 ms |
17236 KB |
Output is correct |
43 |
Correct |
47 ms |
14932 KB |
Output is correct |
44 |
Correct |
40 ms |
11864 KB |
Output is correct |
45 |
Correct |
46 ms |
11976 KB |
Output is correct |
46 |
Correct |
39 ms |
11980 KB |
Output is correct |
47 |
Correct |
41 ms |
17236 KB |
Output is correct |
48 |
Correct |
43 ms |
17128 KB |
Output is correct |
49 |
Correct |
57 ms |
17236 KB |
Output is correct |
50 |
Correct |
44 ms |
17232 KB |
Output is correct |
51 |
Correct |
40 ms |
19048 KB |
Output is correct |
52 |
Correct |
40 ms |
19028 KB |
Output is correct |
53 |
Correct |
30 ms |
12124 KB |
Output is correct |
54 |
Correct |
29 ms |
12120 KB |
Output is correct |
55 |
Correct |
44 ms |
11876 KB |
Output is correct |
56 |
Correct |
41 ms |
11864 KB |
Output is correct |
57 |
Correct |
41 ms |
11864 KB |
Output is correct |
58 |
Correct |
40 ms |
11752 KB |
Output is correct |
59 |
Correct |
45 ms |
11856 KB |
Output is correct |
60 |
Correct |
60 ms |
14684 KB |
Output is correct |
61 |
Correct |
42 ms |
17388 KB |
Output is correct |
62 |
Correct |
44 ms |
17492 KB |
Output is correct |
63 |
Correct |
53 ms |
17232 KB |
Output is correct |
64 |
Correct |
46 ms |
17236 KB |
Output is correct |
65 |
Correct |
44 ms |
11868 KB |
Output is correct |
66 |
Correct |
40 ms |
11812 KB |
Output is correct |
67 |
Correct |
39 ms |
11980 KB |
Output is correct |
68 |
Correct |
26 ms |
12212 KB |
Output is correct |
69 |
Correct |
26 ms |
12124 KB |
Output is correct |
70 |
Correct |
47 ms |
17424 KB |
Output is correct |
71 |
Correct |
43 ms |
17236 KB |
Output is correct |
72 |
Correct |
1 ms |
6488 KB |
Output is correct |
73 |
Correct |
4 ms |
7004 KB |
Output is correct |
74 |
Correct |
4 ms |
7004 KB |
Output is correct |
75 |
Correct |
1 ms |
6492 KB |
Output is correct |
76 |
Correct |
1 ms |
6492 KB |
Output is correct |
77 |
Correct |
4 ms |
9464 KB |
Output is correct |
78 |
Correct |
4 ms |
9052 KB |
Output is correct |
79 |
Correct |
3 ms |
7004 KB |
Output is correct |
80 |
Correct |
3 ms |
7004 KB |
Output is correct |
81 |
Correct |
2 ms |
6492 KB |
Output is correct |
82 |
Correct |
1 ms |
6492 KB |
Output is correct |
83 |
Correct |
1 ms |
6492 KB |
Output is correct |
84 |
Correct |
2 ms |
6492 KB |
Output is correct |
85 |
Correct |
2 ms |
6492 KB |
Output is correct |
86 |
Correct |
12 ms |
7004 KB |
Output is correct |
87 |
Correct |
12 ms |
7004 KB |
Output is correct |
88 |
Correct |
12 ms |
7004 KB |
Output is correct |
89 |
Correct |
5 ms |
9304 KB |
Output is correct |
90 |
Correct |
4 ms |
9052 KB |
Output is correct |
91 |
Correct |
9 ms |
5212 KB |
Output is correct |
92 |
Correct |
11 ms |
7244 KB |
Output is correct |
93 |
Correct |
1 ms |
6492 KB |
Output is correct |
94 |
Correct |
53 ms |
18800 KB |
Output is correct |
95 |
Correct |
50 ms |
18684 KB |
Output is correct |
96 |
Correct |
43 ms |
18268 KB |
Output is correct |
97 |
Correct |
45 ms |
18772 KB |
Output is correct |
98 |
Correct |
45 ms |
19036 KB |
Output is correct |
99 |
Correct |
39 ms |
11860 KB |
Output is correct |
100 |
Correct |
43 ms |
11864 KB |
Output is correct |
101 |
Correct |
39 ms |
11856 KB |
Output is correct |
102 |
Correct |
53 ms |
15188 KB |
Output is correct |
103 |
Correct |
41 ms |
17244 KB |
Output is correct |
104 |
Correct |
43 ms |
17488 KB |
Output is correct |
105 |
Correct |
41 ms |
17244 KB |
Output is correct |
106 |
Correct |
47 ms |
17368 KB |
Output is correct |
107 |
Correct |
44 ms |
17116 KB |
Output is correct |
108 |
Correct |
40 ms |
19032 KB |
Output is correct |
109 |
Correct |
41 ms |
19308 KB |
Output is correct |
110 |
Correct |
28 ms |
12128 KB |
Output is correct |
111 |
Correct |
30 ms |
12124 KB |
Output is correct |
112 |
Correct |
47 ms |
11860 KB |
Output is correct |
113 |
Correct |
39 ms |
11868 KB |
Output is correct |