#include<bits/stdc++.h>
using namespace std;
#define fast ios_base::sync_with_stdio(false); cin.tie(NULL); cout.tie(NULL);
#define ll long long int
const ll N = 1e5+5 , INF = 1e18 , MOD = 1e9+7;
vector<ll> adj[N] , level(N) , tin(N);
ll timer = 0;
vector<vector<ll>> up(N,vector<ll>(log2(N)+5));
void dfs1(ll s , ll p){
timer++;
tin[s] = timer;
for(auto u : adj[s]){
if(u == p) continue;
level[u] = level[s]+1;
up[u][0] = s;
for(ll i = 1; i <= log2(N); i++) up[u][i] = up[up[u][i-1]][i-1];
dfs1(u,s);
}
}
ll jump(ll a , ll d){
for(ll i = 0; i <= log2(N); i++){
if(d&(1ll<<i)){
a = up[a][i];
}
}
return a;
}
ll lca(ll a , ll b){
if(level[a] > level[b]) swap(a,b);
b = jump(b,level[b]-level[a]);
if(a == b) return a;
for(ll i = log2(N); i >= 0; i--){
if(up[a][i] != up[b][i]){
a = up[a][i];
b = up[b][i];
}
}
return up[a][0];
}
bool comp(ll a , ll b){
return tin[a] < tin[b];
}
vector<ll> cnt(N),sum(N);
void dfs2(ll s , ll p){
sum[s] = cnt[s];
for(auto u : adj[s]){
if(u == p) continue;
dfs2(u,s);
sum[s] += sum[u];
}
}
void solve(){
ll n,m,k;
cin >> n >> m >> k;
vector<tuple<ll,ll,ll>> edge;
for(ll i = 1; i < n; i++){
ll a,b;
cin >> a >> b;
adj[a].push_back(b);
adj[b].push_back(a);
edge.push_back(make_tuple(a,b,i));
}
level[1] = 0;
for(ll i = 0; i <= log2(N); i++) up[1][i] = 0;
dfs1(1,0);
for(ll i = 1; i <= m; i++){
ll s;
cin >> s;
vector<ll> node;
for(ll j = 1; j <= s; j++){
ll x;
cin >> x;
node.push_back(x);
}
sort(node.begin(),node.end(),comp);
node.push_back(node[0]);
for(ll i = 1; i <= s; i++){
ll a = node[i-1];
ll b = node[i];
ll l = lca(a,b);
cnt[a]++;
cnt[b]++;
cnt[l] -= 2;
}
}
dfs2(1,0);
vector<ll> ans;
for(auto u : edge){
ll a,b,ind;
tie(a,b,ind) = u;
if(level[a] > level[b]) swap(a,b);
ll cur = sum[b];
cur /= 2;
if(cur >= k){
ans.push_back(ind);
}
}
cout << ans.size() << "\n";
for(auto u : ans) cout << u << " ";
}
int main(){
fast;
ll tc = 1;
// cin >> tc;
while(tc--) solve();
return 0;
}
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
15 ms |
25392 KB |
Output is correct |
2 |
Correct |
21 ms |
26196 KB |
Output is correct |
3 |
Correct |
21 ms |
26200 KB |
Output is correct |
4 |
Correct |
16 ms |
25396 KB |
Output is correct |
5 |
Correct |
19 ms |
25392 KB |
Output is correct |
6 |
Correct |
21 ms |
26492 KB |
Output is correct |
7 |
Correct |
21 ms |
26136 KB |
Output is correct |
8 |
Correct |
20 ms |
26172 KB |
Output is correct |
9 |
Correct |
23 ms |
26196 KB |
Output is correct |
10 |
Correct |
20 ms |
25300 KB |
Output is correct |
11 |
Correct |
17 ms |
25364 KB |
Output is correct |
12 |
Correct |
15 ms |
25300 KB |
Output is correct |
13 |
Correct |
21 ms |
25312 KB |
Output is correct |
14 |
Correct |
18 ms |
25300 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
15 ms |
25392 KB |
Output is correct |
2 |
Correct |
21 ms |
26196 KB |
Output is correct |
3 |
Correct |
21 ms |
26200 KB |
Output is correct |
4 |
Correct |
16 ms |
25396 KB |
Output is correct |
5 |
Correct |
19 ms |
25392 KB |
Output is correct |
6 |
Correct |
21 ms |
26492 KB |
Output is correct |
7 |
Correct |
21 ms |
26136 KB |
Output is correct |
8 |
Correct |
20 ms |
26172 KB |
Output is correct |
9 |
Correct |
23 ms |
26196 KB |
Output is correct |
10 |
Correct |
20 ms |
25300 KB |
Output is correct |
11 |
Correct |
17 ms |
25364 KB |
Output is correct |
12 |
Correct |
15 ms |
25300 KB |
Output is correct |
13 |
Correct |
21 ms |
25312 KB |
Output is correct |
14 |
Correct |
18 ms |
25300 KB |
Output is correct |
15 |
Correct |
34 ms |
26220 KB |
Output is correct |
16 |
Correct |
34 ms |
26228 KB |
Output is correct |
17 |
Correct |
36 ms |
26284 KB |
Output is correct |
18 |
Correct |
23 ms |
26600 KB |
Output is correct |
19 |
Correct |
20 ms |
26204 KB |
Output is correct |
20 |
Correct |
33 ms |
26376 KB |
Output is correct |
21 |
Correct |
37 ms |
26216 KB |
Output is correct |
22 |
Correct |
16 ms |
25328 KB |
Output is correct |
23 |
Correct |
21 ms |
26108 KB |
Output is correct |
24 |
Correct |
21 ms |
26108 KB |
Output is correct |
25 |
Correct |
16 ms |
25276 KB |
Output is correct |
26 |
Correct |
16 ms |
25300 KB |
Output is correct |
27 |
Correct |
28 ms |
26512 KB |
Output is correct |
28 |
Correct |
20 ms |
26140 KB |
Output is correct |
29 |
Correct |
21 ms |
26196 KB |
Output is correct |
30 |
Correct |
21 ms |
26136 KB |
Output is correct |
31 |
Correct |
16 ms |
25316 KB |
Output is correct |
32 |
Correct |
16 ms |
25300 KB |
Output is correct |
33 |
Correct |
18 ms |
25300 KB |
Output is correct |
34 |
Correct |
16 ms |
25300 KB |
Output is correct |
35 |
Correct |
20 ms |
25364 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
136 ms |
39400 KB |
Output is correct |
2 |
Correct |
16 ms |
25300 KB |
Output is correct |
3 |
Correct |
144 ms |
38492 KB |
Output is correct |
4 |
Correct |
121 ms |
37292 KB |
Output is correct |
5 |
Correct |
126 ms |
39520 KB |
Output is correct |
6 |
Correct |
95 ms |
39616 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
100 ms |
34908 KB |
Output is correct |
2 |
Correct |
116 ms |
31960 KB |
Output is correct |
3 |
Correct |
131 ms |
31668 KB |
Output is correct |
4 |
Correct |
119 ms |
31612 KB |
Output is correct |
5 |
Correct |
123 ms |
31612 KB |
Output is correct |
6 |
Correct |
96 ms |
34940 KB |
Output is correct |
7 |
Correct |
98 ms |
34760 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
100 ms |
34908 KB |
Output is correct |
2 |
Correct |
116 ms |
31960 KB |
Output is correct |
3 |
Correct |
131 ms |
31668 KB |
Output is correct |
4 |
Correct |
119 ms |
31612 KB |
Output is correct |
5 |
Correct |
123 ms |
31612 KB |
Output is correct |
6 |
Correct |
96 ms |
34940 KB |
Output is correct |
7 |
Correct |
98 ms |
34760 KB |
Output is correct |
8 |
Correct |
123 ms |
35016 KB |
Output is correct |
9 |
Correct |
116 ms |
35028 KB |
Output is correct |
10 |
Correct |
114 ms |
39664 KB |
Output is correct |
11 |
Correct |
98 ms |
39592 KB |
Output is correct |
12 |
Correct |
100 ms |
31892 KB |
Output is correct |
13 |
Correct |
107 ms |
31848 KB |
Output is correct |
14 |
Correct |
130 ms |
31624 KB |
Output is correct |
15 |
Correct |
125 ms |
31616 KB |
Output is correct |
16 |
Correct |
130 ms |
31664 KB |
Output is correct |
17 |
Correct |
120 ms |
31612 KB |
Output is correct |
18 |
Correct |
131 ms |
31692 KB |
Output is correct |
19 |
Correct |
111 ms |
31976 KB |
Output is correct |
20 |
Correct |
121 ms |
35284 KB |
Output is correct |
21 |
Correct |
103 ms |
35700 KB |
Output is correct |
22 |
Correct |
124 ms |
35344 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
15 ms |
25392 KB |
Output is correct |
2 |
Correct |
21 ms |
26196 KB |
Output is correct |
3 |
Correct |
21 ms |
26200 KB |
Output is correct |
4 |
Correct |
16 ms |
25396 KB |
Output is correct |
5 |
Correct |
19 ms |
25392 KB |
Output is correct |
6 |
Correct |
21 ms |
26492 KB |
Output is correct |
7 |
Correct |
21 ms |
26136 KB |
Output is correct |
8 |
Correct |
20 ms |
26172 KB |
Output is correct |
9 |
Correct |
23 ms |
26196 KB |
Output is correct |
10 |
Correct |
20 ms |
25300 KB |
Output is correct |
11 |
Correct |
17 ms |
25364 KB |
Output is correct |
12 |
Correct |
15 ms |
25300 KB |
Output is correct |
13 |
Correct |
21 ms |
25312 KB |
Output is correct |
14 |
Correct |
18 ms |
25300 KB |
Output is correct |
15 |
Correct |
34 ms |
26220 KB |
Output is correct |
16 |
Correct |
34 ms |
26228 KB |
Output is correct |
17 |
Correct |
36 ms |
26284 KB |
Output is correct |
18 |
Correct |
23 ms |
26600 KB |
Output is correct |
19 |
Correct |
20 ms |
26204 KB |
Output is correct |
20 |
Correct |
33 ms |
26376 KB |
Output is correct |
21 |
Correct |
37 ms |
26216 KB |
Output is correct |
22 |
Correct |
16 ms |
25328 KB |
Output is correct |
23 |
Correct |
21 ms |
26108 KB |
Output is correct |
24 |
Correct |
21 ms |
26108 KB |
Output is correct |
25 |
Correct |
16 ms |
25276 KB |
Output is correct |
26 |
Correct |
16 ms |
25300 KB |
Output is correct |
27 |
Correct |
28 ms |
26512 KB |
Output is correct |
28 |
Correct |
20 ms |
26140 KB |
Output is correct |
29 |
Correct |
21 ms |
26196 KB |
Output is correct |
30 |
Correct |
21 ms |
26136 KB |
Output is correct |
31 |
Correct |
16 ms |
25316 KB |
Output is correct |
32 |
Correct |
16 ms |
25300 KB |
Output is correct |
33 |
Correct |
18 ms |
25300 KB |
Output is correct |
34 |
Correct |
16 ms |
25300 KB |
Output is correct |
35 |
Correct |
20 ms |
25364 KB |
Output is correct |
36 |
Correct |
136 ms |
39400 KB |
Output is correct |
37 |
Correct |
16 ms |
25300 KB |
Output is correct |
38 |
Correct |
144 ms |
38492 KB |
Output is correct |
39 |
Correct |
121 ms |
37292 KB |
Output is correct |
40 |
Correct |
126 ms |
39520 KB |
Output is correct |
41 |
Correct |
95 ms |
39616 KB |
Output is correct |
42 |
Correct |
100 ms |
34908 KB |
Output is correct |
43 |
Correct |
116 ms |
31960 KB |
Output is correct |
44 |
Correct |
131 ms |
31668 KB |
Output is correct |
45 |
Correct |
119 ms |
31612 KB |
Output is correct |
46 |
Correct |
123 ms |
31612 KB |
Output is correct |
47 |
Correct |
96 ms |
34940 KB |
Output is correct |
48 |
Correct |
98 ms |
34760 KB |
Output is correct |
49 |
Correct |
123 ms |
35016 KB |
Output is correct |
50 |
Correct |
116 ms |
35028 KB |
Output is correct |
51 |
Correct |
114 ms |
39664 KB |
Output is correct |
52 |
Correct |
98 ms |
39592 KB |
Output is correct |
53 |
Correct |
100 ms |
31892 KB |
Output is correct |
54 |
Correct |
107 ms |
31848 KB |
Output is correct |
55 |
Correct |
130 ms |
31624 KB |
Output is correct |
56 |
Correct |
125 ms |
31616 KB |
Output is correct |
57 |
Correct |
130 ms |
31664 KB |
Output is correct |
58 |
Correct |
120 ms |
31612 KB |
Output is correct |
59 |
Correct |
131 ms |
31692 KB |
Output is correct |
60 |
Correct |
111 ms |
31976 KB |
Output is correct |
61 |
Correct |
121 ms |
35284 KB |
Output is correct |
62 |
Correct |
103 ms |
35700 KB |
Output is correct |
63 |
Correct |
124 ms |
35344 KB |
Output is correct |
64 |
Correct |
110 ms |
35232 KB |
Output is correct |
65 |
Correct |
137 ms |
31716 KB |
Output is correct |
66 |
Correct |
146 ms |
31656 KB |
Output is correct |
67 |
Correct |
138 ms |
31844 KB |
Output is correct |
68 |
Correct |
101 ms |
32120 KB |
Output is correct |
69 |
Correct |
96 ms |
32040 KB |
Output is correct |
70 |
Correct |
119 ms |
35844 KB |
Output is correct |
71 |
Correct |
112 ms |
34676 KB |
Output is correct |
72 |
Correct |
16 ms |
25428 KB |
Output is correct |
73 |
Correct |
24 ms |
26104 KB |
Output is correct |
74 |
Correct |
20 ms |
26196 KB |
Output is correct |
75 |
Correct |
16 ms |
25368 KB |
Output is correct |
76 |
Correct |
16 ms |
25396 KB |
Output is correct |
77 |
Correct |
21 ms |
26512 KB |
Output is correct |
78 |
Correct |
20 ms |
26180 KB |
Output is correct |
79 |
Correct |
19 ms |
26120 KB |
Output is correct |
80 |
Correct |
21 ms |
26120 KB |
Output is correct |
81 |
Correct |
16 ms |
25400 KB |
Output is correct |
82 |
Correct |
18 ms |
25348 KB |
Output is correct |
83 |
Correct |
18 ms |
25308 KB |
Output is correct |
84 |
Correct |
15 ms |
25356 KB |
Output is correct |
85 |
Correct |
16 ms |
25400 KB |
Output is correct |
86 |
Correct |
36 ms |
26200 KB |
Output is correct |
87 |
Correct |
36 ms |
26308 KB |
Output is correct |
88 |
Correct |
34 ms |
26376 KB |
Output is correct |
89 |
Correct |
21 ms |
26440 KB |
Output is correct |
90 |
Correct |
20 ms |
26160 KB |
Output is correct |
91 |
Correct |
34 ms |
26376 KB |
Output is correct |
92 |
Correct |
35 ms |
26180 KB |
Output is correct |
93 |
Correct |
20 ms |
25288 KB |
Output is correct |
94 |
Correct |
145 ms |
39404 KB |
Output is correct |
95 |
Correct |
131 ms |
38496 KB |
Output is correct |
96 |
Correct |
139 ms |
37268 KB |
Output is correct |
97 |
Correct |
124 ms |
39524 KB |
Output is correct |
98 |
Correct |
98 ms |
39644 KB |
Output is correct |
99 |
Correct |
134 ms |
31608 KB |
Output is correct |
100 |
Correct |
116 ms |
31700 KB |
Output is correct |
101 |
Correct |
135 ms |
31608 KB |
Output is correct |
102 |
Correct |
126 ms |
31952 KB |
Output is correct |
103 |
Correct |
103 ms |
34792 KB |
Output is correct |
104 |
Correct |
96 ms |
35600 KB |
Output is correct |
105 |
Correct |
112 ms |
34704 KB |
Output is correct |
106 |
Correct |
119 ms |
35228 KB |
Output is correct |
107 |
Correct |
115 ms |
34968 KB |
Output is correct |
108 |
Correct |
102 ms |
39668 KB |
Output is correct |
109 |
Correct |
101 ms |
39748 KB |
Output is correct |
110 |
Correct |
100 ms |
31952 KB |
Output is correct |
111 |
Correct |
104 ms |
31948 KB |
Output is correct |
112 |
Correct |
134 ms |
31636 KB |
Output is correct |
113 |
Correct |
114 ms |
31680 KB |
Output is correct |