#include <bits/stdc++.h>
using namespace std;
#define fi first
#define se second
#define ll long long
#define pb push_back
#define ii pair<int,int>
const int nax=2e5+5;
int n,m,k;
vector<pair<int,int>> adj[nax];
int timer=-1;
pair<int,int> tin[nax];
int tab[nax];
int dp[nax][20];
int depth[nax];
int ans[nax];
int pre[nax];
bool compare(int x,int y){
return tin[x].fi<tin[y].fi;
}
void euler(int x,int p){
tin[x].fi=++timer;
for (int i = 1; i < 20; ++i)
{
dp[x][i]=dp[dp[x][i-1]][i-1];
}
for(auto u:adj[x]){
if(u.fi==p) continue;
dp[u.fi][0]=x;
depth[u.fi]=depth[x]+1;
euler(u.fi,x);
}
tin[x].se=timer;
}
int jump(int x,int d){
for (int i = 19; i >= 0; --i)
{
if(d&(1<<i)) x=dp[x][i];
}
return x;
}
int lca(int x,int y){
if(depth[x]<depth[y]) swap(x,y);
x=jump(x,depth[x]-depth[y]);
if(x==y) return x;
for (int i = 19; i >= 0; --i)
{
if(dp[x][i]!=dp[y][i]){
x=dp[x][i];
y=dp[y][i];
}
}
return dp[x][0];
}
int res;
void dfs(int x,int p){
for(auto u:adj[x]){
if(u.fi==p) continue;
dfs(u.fi,x);
if(pre[u.fi]>=2*k){
ans[u.se]=1;
res++;
}
pre[x]+=pre[u.fi];
}
//cout <<x<<" "<<pre[x]<<endl;
}
int main(){
cin>>n>>m>>k;
for (int i = 0; i < n-1; ++i)
{
int x,y;
cin>>x>>y;
x--;y--;
adj[x].pb({y,i});
adj[y].pb({x,i});
}
euler(0,-1);
for (int i = 0; i < m; ++i)
{
int s;
cin>>s;
vector<int> state(s);
for (int j = 0; j < s; ++j)
{
cin>>state[j];
state[j]--;
}
sort(state.begin(),state.end(),compare);
for (int j = 0; j < s; ++j)
{
int l=lca(state[j],state[(j+1)%s]);
//cout <<state[j]<<" "<<state[(j+1)%s]<<" "<<l<<endl;
pre[l]-=2;
pre[state[j]]++;
pre[state[(j+1)%s]]++;
}
}
dfs(0,-1);
cout <<res<<endl;
for (int i = 0; i < n-1; ++i)
{
if(ans[i]) cout <<i+1<<" ";
}
}
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1 ms |
6744 KB |
Output is correct |
2 |
Correct |
7 ms |
8028 KB |
Output is correct |
3 |
Correct |
6 ms |
8028 KB |
Output is correct |
4 |
Correct |
1 ms |
6748 KB |
Output is correct |
5 |
Correct |
1 ms |
6748 KB |
Output is correct |
6 |
Correct |
6 ms |
8540 KB |
Output is correct |
7 |
Correct |
7 ms |
8308 KB |
Output is correct |
8 |
Correct |
6 ms |
8024 KB |
Output is correct |
9 |
Correct |
7 ms |
8024 KB |
Output is correct |
10 |
Correct |
1 ms |
6844 KB |
Output is correct |
11 |
Correct |
1 ms |
6748 KB |
Output is correct |
12 |
Correct |
1 ms |
6744 KB |
Output is correct |
13 |
Correct |
1 ms |
6748 KB |
Output is correct |
14 |
Correct |
1 ms |
6744 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1 ms |
6744 KB |
Output is correct |
2 |
Correct |
7 ms |
8028 KB |
Output is correct |
3 |
Correct |
6 ms |
8028 KB |
Output is correct |
4 |
Correct |
1 ms |
6748 KB |
Output is correct |
5 |
Correct |
1 ms |
6748 KB |
Output is correct |
6 |
Correct |
6 ms |
8540 KB |
Output is correct |
7 |
Correct |
7 ms |
8308 KB |
Output is correct |
8 |
Correct |
6 ms |
8024 KB |
Output is correct |
9 |
Correct |
7 ms |
8024 KB |
Output is correct |
10 |
Correct |
1 ms |
6844 KB |
Output is correct |
11 |
Correct |
1 ms |
6748 KB |
Output is correct |
12 |
Correct |
1 ms |
6744 KB |
Output is correct |
13 |
Correct |
1 ms |
6748 KB |
Output is correct |
14 |
Correct |
1 ms |
6744 KB |
Output is correct |
15 |
Correct |
23 ms |
8460 KB |
Output is correct |
16 |
Correct |
24 ms |
8540 KB |
Output is correct |
17 |
Correct |
25 ms |
8540 KB |
Output is correct |
18 |
Correct |
10 ms |
8580 KB |
Output is correct |
19 |
Correct |
10 ms |
8196 KB |
Output is correct |
20 |
Correct |
35 ms |
8788 KB |
Output is correct |
21 |
Correct |
26 ms |
8540 KB |
Output is correct |
22 |
Correct |
1 ms |
6748 KB |
Output is correct |
23 |
Correct |
7 ms |
8280 KB |
Output is correct |
24 |
Correct |
9 ms |
8188 KB |
Output is correct |
25 |
Correct |
1 ms |
6748 KB |
Output is correct |
26 |
Correct |
1 ms |
6748 KB |
Output is correct |
27 |
Correct |
6 ms |
8540 KB |
Output is correct |
28 |
Correct |
6 ms |
8300 KB |
Output is correct |
29 |
Correct |
5 ms |
8080 KB |
Output is correct |
30 |
Correct |
8 ms |
8132 KB |
Output is correct |
31 |
Correct |
1 ms |
6748 KB |
Output is correct |
32 |
Correct |
1 ms |
6744 KB |
Output is correct |
33 |
Correct |
1 ms |
6748 KB |
Output is correct |
34 |
Correct |
1 ms |
6748 KB |
Output is correct |
35 |
Correct |
1 ms |
6748 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
84 ms |
29012 KB |
Output is correct |
2 |
Correct |
1 ms |
6744 KB |
Output is correct |
3 |
Correct |
87 ms |
28792 KB |
Output is correct |
4 |
Correct |
80 ms |
28296 KB |
Output is correct |
5 |
Correct |
94 ms |
29008 KB |
Output is correct |
6 |
Correct |
92 ms |
29520 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
75 ms |
24952 KB |
Output is correct |
2 |
Correct |
79 ms |
21588 KB |
Output is correct |
3 |
Correct |
78 ms |
21072 KB |
Output is correct |
4 |
Correct |
81 ms |
21072 KB |
Output is correct |
5 |
Correct |
78 ms |
21072 KB |
Output is correct |
6 |
Correct |
84 ms |
25168 KB |
Output is correct |
7 |
Correct |
84 ms |
24916 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
75 ms |
24952 KB |
Output is correct |
2 |
Correct |
79 ms |
21588 KB |
Output is correct |
3 |
Correct |
78 ms |
21072 KB |
Output is correct |
4 |
Correct |
81 ms |
21072 KB |
Output is correct |
5 |
Correct |
78 ms |
21072 KB |
Output is correct |
6 |
Correct |
84 ms |
25168 KB |
Output is correct |
7 |
Correct |
84 ms |
24916 KB |
Output is correct |
8 |
Correct |
87 ms |
24996 KB |
Output is correct |
9 |
Correct |
82 ms |
25128 KB |
Output is correct |
10 |
Correct |
82 ms |
29220 KB |
Output is correct |
11 |
Correct |
81 ms |
29268 KB |
Output is correct |
12 |
Correct |
61 ms |
20816 KB |
Output is correct |
13 |
Correct |
64 ms |
20812 KB |
Output is correct |
14 |
Correct |
77 ms |
21076 KB |
Output is correct |
15 |
Correct |
79 ms |
21072 KB |
Output is correct |
16 |
Correct |
79 ms |
21072 KB |
Output is correct |
17 |
Correct |
85 ms |
21080 KB |
Output is correct |
18 |
Correct |
82 ms |
21068 KB |
Output is correct |
19 |
Correct |
81 ms |
21588 KB |
Output is correct |
20 |
Correct |
79 ms |
25156 KB |
Output is correct |
21 |
Correct |
86 ms |
25424 KB |
Output is correct |
22 |
Correct |
94 ms |
25292 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1 ms |
6744 KB |
Output is correct |
2 |
Correct |
7 ms |
8028 KB |
Output is correct |
3 |
Correct |
6 ms |
8028 KB |
Output is correct |
4 |
Correct |
1 ms |
6748 KB |
Output is correct |
5 |
Correct |
1 ms |
6748 KB |
Output is correct |
6 |
Correct |
6 ms |
8540 KB |
Output is correct |
7 |
Correct |
7 ms |
8308 KB |
Output is correct |
8 |
Correct |
6 ms |
8024 KB |
Output is correct |
9 |
Correct |
7 ms |
8024 KB |
Output is correct |
10 |
Correct |
1 ms |
6844 KB |
Output is correct |
11 |
Correct |
1 ms |
6748 KB |
Output is correct |
12 |
Correct |
1 ms |
6744 KB |
Output is correct |
13 |
Correct |
1 ms |
6748 KB |
Output is correct |
14 |
Correct |
1 ms |
6744 KB |
Output is correct |
15 |
Correct |
23 ms |
8460 KB |
Output is correct |
16 |
Correct |
24 ms |
8540 KB |
Output is correct |
17 |
Correct |
25 ms |
8540 KB |
Output is correct |
18 |
Correct |
10 ms |
8580 KB |
Output is correct |
19 |
Correct |
10 ms |
8196 KB |
Output is correct |
20 |
Correct |
35 ms |
8788 KB |
Output is correct |
21 |
Correct |
26 ms |
8540 KB |
Output is correct |
22 |
Correct |
1 ms |
6748 KB |
Output is correct |
23 |
Correct |
7 ms |
8280 KB |
Output is correct |
24 |
Correct |
9 ms |
8188 KB |
Output is correct |
25 |
Correct |
1 ms |
6748 KB |
Output is correct |
26 |
Correct |
1 ms |
6748 KB |
Output is correct |
27 |
Correct |
6 ms |
8540 KB |
Output is correct |
28 |
Correct |
6 ms |
8300 KB |
Output is correct |
29 |
Correct |
5 ms |
8080 KB |
Output is correct |
30 |
Correct |
8 ms |
8132 KB |
Output is correct |
31 |
Correct |
1 ms |
6748 KB |
Output is correct |
32 |
Correct |
1 ms |
6744 KB |
Output is correct |
33 |
Correct |
1 ms |
6748 KB |
Output is correct |
34 |
Correct |
1 ms |
6748 KB |
Output is correct |
35 |
Correct |
1 ms |
6748 KB |
Output is correct |
36 |
Correct |
84 ms |
29012 KB |
Output is correct |
37 |
Correct |
1 ms |
6744 KB |
Output is correct |
38 |
Correct |
87 ms |
28792 KB |
Output is correct |
39 |
Correct |
80 ms |
28296 KB |
Output is correct |
40 |
Correct |
94 ms |
29008 KB |
Output is correct |
41 |
Correct |
92 ms |
29520 KB |
Output is correct |
42 |
Correct |
75 ms |
24952 KB |
Output is correct |
43 |
Correct |
79 ms |
21588 KB |
Output is correct |
44 |
Correct |
78 ms |
21072 KB |
Output is correct |
45 |
Correct |
81 ms |
21072 KB |
Output is correct |
46 |
Correct |
78 ms |
21072 KB |
Output is correct |
47 |
Correct |
84 ms |
25168 KB |
Output is correct |
48 |
Correct |
84 ms |
24916 KB |
Output is correct |
49 |
Correct |
87 ms |
24996 KB |
Output is correct |
50 |
Correct |
82 ms |
25128 KB |
Output is correct |
51 |
Correct |
82 ms |
29220 KB |
Output is correct |
52 |
Correct |
81 ms |
29268 KB |
Output is correct |
53 |
Correct |
61 ms |
20816 KB |
Output is correct |
54 |
Correct |
64 ms |
20812 KB |
Output is correct |
55 |
Correct |
77 ms |
21076 KB |
Output is correct |
56 |
Correct |
79 ms |
21072 KB |
Output is correct |
57 |
Correct |
79 ms |
21072 KB |
Output is correct |
58 |
Correct |
85 ms |
21080 KB |
Output is correct |
59 |
Correct |
82 ms |
21068 KB |
Output is correct |
60 |
Correct |
81 ms |
21588 KB |
Output is correct |
61 |
Correct |
79 ms |
25156 KB |
Output is correct |
62 |
Correct |
86 ms |
25424 KB |
Output is correct |
63 |
Correct |
94 ms |
25292 KB |
Output is correct |
64 |
Correct |
79 ms |
25168 KB |
Output is correct |
65 |
Correct |
78 ms |
21072 KB |
Output is correct |
66 |
Correct |
83 ms |
21076 KB |
Output is correct |
67 |
Correct |
109 ms |
21072 KB |
Output is correct |
68 |
Correct |
59 ms |
20816 KB |
Output is correct |
69 |
Correct |
56 ms |
20820 KB |
Output is correct |
70 |
Correct |
85 ms |
25432 KB |
Output is correct |
71 |
Correct |
79 ms |
24916 KB |
Output is correct |
72 |
Correct |
1 ms |
6748 KB |
Output is correct |
73 |
Correct |
6 ms |
8028 KB |
Output is correct |
74 |
Correct |
8 ms |
8028 KB |
Output is correct |
75 |
Correct |
1 ms |
6748 KB |
Output is correct |
76 |
Correct |
1 ms |
6748 KB |
Output is correct |
77 |
Correct |
7 ms |
8536 KB |
Output is correct |
78 |
Correct |
7 ms |
8284 KB |
Output is correct |
79 |
Correct |
5 ms |
8028 KB |
Output is correct |
80 |
Correct |
8 ms |
8124 KB |
Output is correct |
81 |
Correct |
1 ms |
6840 KB |
Output is correct |
82 |
Correct |
1 ms |
6748 KB |
Output is correct |
83 |
Correct |
2 ms |
6744 KB |
Output is correct |
84 |
Correct |
1 ms |
6748 KB |
Output is correct |
85 |
Correct |
2 ms |
6748 KB |
Output is correct |
86 |
Correct |
24 ms |
8544 KB |
Output is correct |
87 |
Correct |
24 ms |
8528 KB |
Output is correct |
88 |
Correct |
26 ms |
8796 KB |
Output is correct |
89 |
Correct |
7 ms |
8536 KB |
Output is correct |
90 |
Correct |
7 ms |
8284 KB |
Output is correct |
91 |
Correct |
24 ms |
8656 KB |
Output is correct |
92 |
Correct |
30 ms |
8540 KB |
Output is correct |
93 |
Correct |
1 ms |
6748 KB |
Output is correct |
94 |
Correct |
111 ms |
29076 KB |
Output is correct |
95 |
Correct |
88 ms |
28696 KB |
Output is correct |
96 |
Correct |
85 ms |
28248 KB |
Output is correct |
97 |
Correct |
81 ms |
29012 KB |
Output is correct |
98 |
Correct |
89 ms |
29524 KB |
Output is correct |
99 |
Correct |
79 ms |
21052 KB |
Output is correct |
100 |
Correct |
80 ms |
21080 KB |
Output is correct |
101 |
Correct |
82 ms |
21072 KB |
Output is correct |
102 |
Correct |
112 ms |
21584 KB |
Output is correct |
103 |
Correct |
88 ms |
24944 KB |
Output is correct |
104 |
Correct |
79 ms |
25268 KB |
Output is correct |
105 |
Correct |
80 ms |
24916 KB |
Output is correct |
106 |
Correct |
98 ms |
25256 KB |
Output is correct |
107 |
Correct |
80 ms |
24912 KB |
Output is correct |
108 |
Correct |
83 ms |
29268 KB |
Output is correct |
109 |
Correct |
79 ms |
29068 KB |
Output is correct |
110 |
Correct |
62 ms |
20820 KB |
Output is correct |
111 |
Correct |
65 ms |
20820 KB |
Output is correct |
112 |
Correct |
75 ms |
21052 KB |
Output is correct |
113 |
Correct |
82 ms |
21072 KB |
Output is correct |