#include <bits/stdc++.h>
using namespace std;
#define int long long
#define sp << " " <<
#define nl << "\n"
struct segtree{
int sz = 1;
vector<bool> a;
segtree(int n){
while(sz < n) sz *= 2;
a.assign(2*sz, false);
}
void update(int i, int x, int lx, int rx){
if(rx-lx==1) return void(a[x] = !a[x]);
int mx = (lx+rx)/2;
if(i<mx) update(i, 2*x+1, lx, mx);
else update(i, 2*x+2, mx, rx);
a[x] = max(a[2*x+1], a[2*x+2]);
}
void update(int i){ update(i, 0, 0, sz); }
bool get(int l, int r, int x, int lx, int rx){
if(r<=lx or rx<=l) return false;
if(l<=lx and rx<=r) return a[x];
int mx = (lx+rx)/2;
return get(l, r, 2*x+1, lx, mx) or get(l, r, 2*x+2, mx, rx);
}
bool get(int l, int r){ return get(l, r+1, 0, 0, sz); }
};
vector<vector<pair<int, int>>> g;
vector<array<int, 18>> p;
vector<int> t0, t1, dp, ans;
int dfsTimer = 0;
void dfs0(int u, int parent){
t0[u] = dfsTimer++;
p[u][0] = parent;
for(int i=1; i<18; ++i) p[u][i] = p[p[u][i-1]][i-1];
for(auto e : g[u]) if(e.first != parent) dfs0(e.first, u);
t1[u] = dfsTimer++;
}
bool isAncestor(int u, int v){
return t0[u]<=t0[v] and t1[v]<=t1[u];
}
int dfs1(int u){
for(auto edge : g[u]){
int v = edge.first, e = edge.second;
if(v==p[u][0]) continue;
ans[e] = dfs1(v);
dp[u] += ans[e];
}
return dp[u];
}
int lca(int u, int v){
if(isAncestor(u, v)) return u;
for(int i=17; i>=0; --i)
while(u and !isAncestor(p[u][i], v)) u = p[u][i];
return p[u][0];
}
signed main(){
cin.tie(0)->sync_with_stdio(0);
int n, m, k, x, y; cin >> n >> m >> k;
g.resize(n), p.resize(n), t0.resize(n), t1.resize(n);
dp.assign(n, 0), ans.resize(n);
for(int i=1; i<n; ++i){
cin >> x >> y; --x, --y;
g[x].emplace_back(y, i);
g[y].emplace_back(x, i);
}
dfs0(0, 0);
segtree st(n+n);
while(m--){
int s; cin >> s;
vector<int> curr(s), updated;
for(int &i : curr) cin >> i, --i;
int x = curr[0];
for(int i : curr) x = lca(x, i);
for(int i : curr){
int u = i;
if(st.get(t0[u], t1[u])) continue;
for(int j=17; j>=0; --j)
while(u and isAncestor(x, p[u][j]) and !st.get(t0[p[u][j]], t1[p[u][j]]))
u = p[u][j];
st.update(t0[i]);
updated.push_back(t0[i]);
++dp[i];
if(u != x) u = p[u][0];
--dp[u];
}
for(int i : updated) st.update(i);
}
dfs1(0);
vector<int> res;
for(int i=1; i<n; ++i) if(ans[i]>=k) res.push_back(i);
// for(int i : ans) cout << i << ' ';
// cout nl;
cout << res.size() nl;
for(int i : res) cout << i << ' ';
}
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1 ms |
364 KB |
Output is correct |
2 |
Correct |
11 ms |
2924 KB |
Output is correct |
3 |
Correct |
9 ms |
2796 KB |
Output is correct |
4 |
Correct |
2 ms |
364 KB |
Output is correct |
5 |
Correct |
1 ms |
364 KB |
Output is correct |
6 |
Correct |
12 ms |
3436 KB |
Output is correct |
7 |
Correct |
10 ms |
3052 KB |
Output is correct |
8 |
Correct |
8 ms |
2924 KB |
Output is correct |
9 |
Correct |
8 ms |
2924 KB |
Output is correct |
10 |
Correct |
1 ms |
364 KB |
Output is correct |
11 |
Correct |
1 ms |
364 KB |
Output is correct |
12 |
Correct |
1 ms |
364 KB |
Output is correct |
13 |
Correct |
1 ms |
384 KB |
Output is correct |
14 |
Correct |
1 ms |
372 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1 ms |
364 KB |
Output is correct |
2 |
Correct |
11 ms |
2924 KB |
Output is correct |
3 |
Correct |
9 ms |
2796 KB |
Output is correct |
4 |
Correct |
2 ms |
364 KB |
Output is correct |
5 |
Correct |
1 ms |
364 KB |
Output is correct |
6 |
Correct |
12 ms |
3436 KB |
Output is correct |
7 |
Correct |
10 ms |
3052 KB |
Output is correct |
8 |
Correct |
8 ms |
2924 KB |
Output is correct |
9 |
Correct |
8 ms |
2924 KB |
Output is correct |
10 |
Correct |
1 ms |
364 KB |
Output is correct |
11 |
Correct |
1 ms |
364 KB |
Output is correct |
12 |
Correct |
1 ms |
364 KB |
Output is correct |
13 |
Correct |
1 ms |
384 KB |
Output is correct |
14 |
Correct |
1 ms |
372 KB |
Output is correct |
15 |
Correct |
104 ms |
3308 KB |
Output is correct |
16 |
Correct |
101 ms |
3436 KB |
Output is correct |
17 |
Correct |
106 ms |
3436 KB |
Output is correct |
18 |
Correct |
16 ms |
3436 KB |
Output is correct |
19 |
Correct |
11 ms |
3052 KB |
Output is correct |
20 |
Correct |
84 ms |
3560 KB |
Output is correct |
21 |
Correct |
92 ms |
3308 KB |
Output is correct |
22 |
Correct |
1 ms |
364 KB |
Output is correct |
23 |
Correct |
9 ms |
2924 KB |
Output is correct |
24 |
Correct |
9 ms |
2924 KB |
Output is correct |
25 |
Correct |
1 ms |
364 KB |
Output is correct |
26 |
Correct |
1 ms |
364 KB |
Output is correct |
27 |
Correct |
13 ms |
3564 KB |
Output is correct |
28 |
Correct |
12 ms |
3052 KB |
Output is correct |
29 |
Correct |
9 ms |
2924 KB |
Output is correct |
30 |
Correct |
9 ms |
2924 KB |
Output is correct |
31 |
Correct |
1 ms |
364 KB |
Output is correct |
32 |
Correct |
0 ms |
364 KB |
Output is correct |
33 |
Correct |
1 ms |
364 KB |
Output is correct |
34 |
Correct |
1 ms |
364 KB |
Output is correct |
35 |
Correct |
1 ms |
364 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
366 ms |
33768 KB |
Output is correct |
2 |
Correct |
1 ms |
364 KB |
Output is correct |
3 |
Correct |
372 ms |
35036 KB |
Output is correct |
4 |
Correct |
373 ms |
34552 KB |
Output is correct |
5 |
Correct |
606 ms |
35544 KB |
Output is correct |
6 |
Correct |
501 ms |
35936 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
274 ms |
29036 KB |
Output is correct |
2 |
Correct |
242 ms |
25580 KB |
Output is correct |
3 |
Correct |
232 ms |
25068 KB |
Output is correct |
4 |
Correct |
217 ms |
25196 KB |
Output is correct |
5 |
Correct |
233 ms |
25068 KB |
Output is correct |
6 |
Correct |
260 ms |
29292 KB |
Output is correct |
7 |
Correct |
261 ms |
29036 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
274 ms |
29036 KB |
Output is correct |
2 |
Correct |
242 ms |
25580 KB |
Output is correct |
3 |
Correct |
232 ms |
25068 KB |
Output is correct |
4 |
Correct |
217 ms |
25196 KB |
Output is correct |
5 |
Correct |
233 ms |
25068 KB |
Output is correct |
6 |
Correct |
260 ms |
29292 KB |
Output is correct |
7 |
Correct |
261 ms |
29036 KB |
Output is correct |
8 |
Correct |
358 ms |
29292 KB |
Output is correct |
9 |
Correct |
352 ms |
29292 KB |
Output is correct |
10 |
Correct |
539 ms |
34144 KB |
Output is correct |
11 |
Correct |
509 ms |
34016 KB |
Output is correct |
12 |
Correct |
195 ms |
24680 KB |
Output is correct |
13 |
Correct |
177 ms |
24680 KB |
Output is correct |
14 |
Correct |
248 ms |
25068 KB |
Output is correct |
15 |
Correct |
255 ms |
25068 KB |
Output is correct |
16 |
Correct |
243 ms |
25196 KB |
Output is correct |
17 |
Correct |
224 ms |
25068 KB |
Output is correct |
18 |
Correct |
206 ms |
25068 KB |
Output is correct |
19 |
Correct |
277 ms |
25708 KB |
Output is correct |
20 |
Correct |
262 ms |
29416 KB |
Output is correct |
21 |
Correct |
271 ms |
29672 KB |
Output is correct |
22 |
Correct |
278 ms |
29548 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1 ms |
364 KB |
Output is correct |
2 |
Correct |
11 ms |
2924 KB |
Output is correct |
3 |
Correct |
9 ms |
2796 KB |
Output is correct |
4 |
Correct |
2 ms |
364 KB |
Output is correct |
5 |
Correct |
1 ms |
364 KB |
Output is correct |
6 |
Correct |
12 ms |
3436 KB |
Output is correct |
7 |
Correct |
10 ms |
3052 KB |
Output is correct |
8 |
Correct |
8 ms |
2924 KB |
Output is correct |
9 |
Correct |
8 ms |
2924 KB |
Output is correct |
10 |
Correct |
1 ms |
364 KB |
Output is correct |
11 |
Correct |
1 ms |
364 KB |
Output is correct |
12 |
Correct |
1 ms |
364 KB |
Output is correct |
13 |
Correct |
1 ms |
384 KB |
Output is correct |
14 |
Correct |
1 ms |
372 KB |
Output is correct |
15 |
Correct |
104 ms |
3308 KB |
Output is correct |
16 |
Correct |
101 ms |
3436 KB |
Output is correct |
17 |
Correct |
106 ms |
3436 KB |
Output is correct |
18 |
Correct |
16 ms |
3436 KB |
Output is correct |
19 |
Correct |
11 ms |
3052 KB |
Output is correct |
20 |
Correct |
84 ms |
3560 KB |
Output is correct |
21 |
Correct |
92 ms |
3308 KB |
Output is correct |
22 |
Correct |
1 ms |
364 KB |
Output is correct |
23 |
Correct |
9 ms |
2924 KB |
Output is correct |
24 |
Correct |
9 ms |
2924 KB |
Output is correct |
25 |
Correct |
1 ms |
364 KB |
Output is correct |
26 |
Correct |
1 ms |
364 KB |
Output is correct |
27 |
Correct |
13 ms |
3564 KB |
Output is correct |
28 |
Correct |
12 ms |
3052 KB |
Output is correct |
29 |
Correct |
9 ms |
2924 KB |
Output is correct |
30 |
Correct |
9 ms |
2924 KB |
Output is correct |
31 |
Correct |
1 ms |
364 KB |
Output is correct |
32 |
Correct |
0 ms |
364 KB |
Output is correct |
33 |
Correct |
1 ms |
364 KB |
Output is correct |
34 |
Correct |
1 ms |
364 KB |
Output is correct |
35 |
Correct |
1 ms |
364 KB |
Output is correct |
36 |
Correct |
366 ms |
33768 KB |
Output is correct |
37 |
Correct |
1 ms |
364 KB |
Output is correct |
38 |
Correct |
372 ms |
35036 KB |
Output is correct |
39 |
Correct |
373 ms |
34552 KB |
Output is correct |
40 |
Correct |
606 ms |
35544 KB |
Output is correct |
41 |
Correct |
501 ms |
35936 KB |
Output is correct |
42 |
Correct |
274 ms |
29036 KB |
Output is correct |
43 |
Correct |
242 ms |
25580 KB |
Output is correct |
44 |
Correct |
232 ms |
25068 KB |
Output is correct |
45 |
Correct |
217 ms |
25196 KB |
Output is correct |
46 |
Correct |
233 ms |
25068 KB |
Output is correct |
47 |
Correct |
260 ms |
29292 KB |
Output is correct |
48 |
Correct |
261 ms |
29036 KB |
Output is correct |
49 |
Correct |
358 ms |
29292 KB |
Output is correct |
50 |
Correct |
352 ms |
29292 KB |
Output is correct |
51 |
Correct |
539 ms |
34144 KB |
Output is correct |
52 |
Correct |
509 ms |
34016 KB |
Output is correct |
53 |
Correct |
195 ms |
24680 KB |
Output is correct |
54 |
Correct |
177 ms |
24680 KB |
Output is correct |
55 |
Correct |
248 ms |
25068 KB |
Output is correct |
56 |
Correct |
255 ms |
25068 KB |
Output is correct |
57 |
Correct |
243 ms |
25196 KB |
Output is correct |
58 |
Correct |
224 ms |
25068 KB |
Output is correct |
59 |
Correct |
206 ms |
25068 KB |
Output is correct |
60 |
Correct |
277 ms |
25708 KB |
Output is correct |
61 |
Correct |
262 ms |
29416 KB |
Output is correct |
62 |
Correct |
271 ms |
29672 KB |
Output is correct |
63 |
Correct |
278 ms |
29548 KB |
Output is correct |
64 |
Correct |
284 ms |
31212 KB |
Output is correct |
65 |
Correct |
292 ms |
26988 KB |
Output is correct |
66 |
Correct |
297 ms |
26860 KB |
Output is correct |
67 |
Correct |
263 ms |
26860 KB |
Output is correct |
68 |
Correct |
180 ms |
25964 KB |
Output is correct |
69 |
Correct |
149 ms |
25964 KB |
Output is correct |
70 |
Correct |
315 ms |
31596 KB |
Output is correct |
71 |
Correct |
359 ms |
30700 KB |
Output is correct |
72 |
Correct |
1 ms |
364 KB |
Output is correct |
73 |
Correct |
9 ms |
2924 KB |
Output is correct |
74 |
Correct |
10 ms |
2924 KB |
Output is correct |
75 |
Correct |
1 ms |
364 KB |
Output is correct |
76 |
Correct |
1 ms |
364 KB |
Output is correct |
77 |
Correct |
11 ms |
3436 KB |
Output is correct |
78 |
Correct |
10 ms |
3052 KB |
Output is correct |
79 |
Correct |
8 ms |
2924 KB |
Output is correct |
80 |
Correct |
8 ms |
2924 KB |
Output is correct |
81 |
Correct |
1 ms |
364 KB |
Output is correct |
82 |
Correct |
1 ms |
364 KB |
Output is correct |
83 |
Correct |
1 ms |
364 KB |
Output is correct |
84 |
Correct |
2 ms |
364 KB |
Output is correct |
85 |
Correct |
1 ms |
364 KB |
Output is correct |
86 |
Correct |
108 ms |
3308 KB |
Output is correct |
87 |
Correct |
104 ms |
3436 KB |
Output is correct |
88 |
Correct |
104 ms |
3436 KB |
Output is correct |
89 |
Correct |
13 ms |
3436 KB |
Output is correct |
90 |
Correct |
11 ms |
3052 KB |
Output is correct |
91 |
Correct |
88 ms |
3432 KB |
Output is correct |
92 |
Correct |
102 ms |
3332 KB |
Output is correct |
93 |
Correct |
1 ms |
364 KB |
Output is correct |
94 |
Correct |
375 ms |
35680 KB |
Output is correct |
95 |
Correct |
368 ms |
35060 KB |
Output is correct |
96 |
Correct |
362 ms |
34284 KB |
Output is correct |
97 |
Correct |
583 ms |
35680 KB |
Output is correct |
98 |
Correct |
510 ms |
35936 KB |
Output is correct |
99 |
Correct |
218 ms |
27116 KB |
Output is correct |
100 |
Correct |
237 ms |
26988 KB |
Output is correct |
101 |
Correct |
245 ms |
26988 KB |
Output is correct |
102 |
Correct |
241 ms |
27372 KB |
Output is correct |
103 |
Correct |
288 ms |
31084 KB |
Output is correct |
104 |
Correct |
261 ms |
31720 KB |
Output is correct |
105 |
Correct |
243 ms |
30828 KB |
Output is correct |
106 |
Correct |
358 ms |
31208 KB |
Output is correct |
107 |
Correct |
357 ms |
31036 KB |
Output is correct |
108 |
Correct |
510 ms |
35808 KB |
Output is correct |
109 |
Correct |
564 ms |
35684 KB |
Output is correct |
110 |
Correct |
178 ms |
26088 KB |
Output is correct |
111 |
Correct |
189 ms |
26088 KB |
Output is correct |
112 |
Correct |
249 ms |
26860 KB |
Output is correct |
113 |
Correct |
262 ms |
26860 KB |
Output is correct |