#include <bits/stdc++.h>
#define ll long long
#define ld long double
#define sp ' '
#define en '\n'
#define smin(a, b) a = min(a, b)
#define smax(a, b) a = max(a, b)
using namespace std;
const int N = 1e5 + 2;
const int inf = 1e9;
vector<array<int, 2>> g[N], ch[N];
vector<int> a[N], st[N], ans;
int par[N][17], in[N], out[N], tsz, k;
struct Bit {
int bit[N];
void Add(int x, int v) {
for (; x < N; x += x & (-x)) bit[x] += v;
}
int Get(int x) {
int ans = 0;
for (; x > 0; x -= x & (-x)) ans += bit[x];
return ans;
}
}f;
void Dfs(int s, int e) {
in[s] = ++tsz;
par[s][0] = e;
for (int i = 1; i < 17; i++) par[s][i] = par[par[s][i - 1]][i - 1];
for (auto u : g[s]) {
if (u[0] == e) continue;
Dfs(u[0], s);
}
out[s] = tsz;
}
bool Ancestor(int u, int v) {
return in[u] <= in[v] && out[v] <= out[u];
}
int Lca(int u, int v) {
if (Ancestor(u, v)) return u;
if (Ancestor(v, u)) return v;
for (int i = 16; i >= 0; i--) {
if (par[u][i] && !Ancestor(par[u][i], v)) u = par[u][i];
}
return par[u][0];
}
void Solve(int s, int e) {
for (int u : st[s]) f.Add(in[a[u][0]], 1);
for (auto u : ch[s]) {
f.Add(in[a[u[0]][u[1]]], -1);
if (u[1] < a[u[0]].size() - 1) f.Add(in[a[u[0]][u[1] + 1]], 1);
}
for (auto u : g[s]) {
if (u[0] == e) continue;
if (f.Get(out[u[0]]) - f.Get(in[u[0]] - 1) >= k) ans.push_back(u[1]);
Solve(u[0], s);
}
for (int u : st[s]) f.Add(in[a[u][0]], -1);
}
int main() {
ios::sync_with_stdio(false);
cin.tie(0);
cout.tie(0);
int n, s;
cin >> n >> s >> 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(1, 0);
for (int i = 1; i <= s; i++) {
int sz; cin >> sz;
a[i].resize(sz);
for (int j = 0; j < sz; j++) cin >> a[i][j];
sort(a[i].begin(), a[i].end(), [&] (int ii, int jj) {
return in[ii] < in[jj];
});
int lca = a[i][0];
for (int j = 1; j < sz; j++) lca = Lca(lca, a[i][j]);
st[lca].push_back(i);
for (int j = 0; j < sz; j++) ch[a[i][j]].push_back({i, j});
}
Solve(1, 0);
sort(ans.begin(), ans.end());
cout << ans.size() << en;
for (int u : ans) cout << u << sp;
cout << en;
return 0;
}
Compilation message
railway.cpp: In function 'void Solve(int, int)':
railway.cpp:50:18: warning: comparison of integer expressions of different signedness: 'std::array<int, 2>::value_type' {aka 'int'} and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
50 | if (u[1] < a[u[0]].size() - 1) f.Add(in[a[u[0]][u[1] + 1]], 1);
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
5 ms |
9724 KB |
Output is correct |
2 |
Correct |
12 ms |
11140 KB |
Output is correct |
3 |
Correct |
10 ms |
10964 KB |
Output is correct |
4 |
Correct |
5 ms |
9684 KB |
Output is correct |
5 |
Correct |
5 ms |
9684 KB |
Output is correct |
6 |
Correct |
11 ms |
11528 KB |
Output is correct |
7 |
Correct |
11 ms |
11152 KB |
Output is correct |
8 |
Correct |
9 ms |
11012 KB |
Output is correct |
9 |
Correct |
10 ms |
11092 KB |
Output is correct |
10 |
Correct |
5 ms |
9684 KB |
Output is correct |
11 |
Correct |
5 ms |
9684 KB |
Output is correct |
12 |
Correct |
5 ms |
9724 KB |
Output is correct |
13 |
Correct |
5 ms |
9684 KB |
Output is correct |
14 |
Correct |
5 ms |
9684 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
5 ms |
9724 KB |
Output is correct |
2 |
Correct |
12 ms |
11140 KB |
Output is correct |
3 |
Correct |
10 ms |
10964 KB |
Output is correct |
4 |
Correct |
5 ms |
9684 KB |
Output is correct |
5 |
Correct |
5 ms |
9684 KB |
Output is correct |
6 |
Correct |
11 ms |
11528 KB |
Output is correct |
7 |
Correct |
11 ms |
11152 KB |
Output is correct |
8 |
Correct |
9 ms |
11012 KB |
Output is correct |
9 |
Correct |
10 ms |
11092 KB |
Output is correct |
10 |
Correct |
5 ms |
9684 KB |
Output is correct |
11 |
Correct |
5 ms |
9684 KB |
Output is correct |
12 |
Correct |
5 ms |
9724 KB |
Output is correct |
13 |
Correct |
5 ms |
9684 KB |
Output is correct |
14 |
Correct |
5 ms |
9684 KB |
Output is correct |
15 |
Correct |
27 ms |
12716 KB |
Output is correct |
16 |
Correct |
33 ms |
12816 KB |
Output is correct |
17 |
Correct |
26 ms |
12756 KB |
Output is correct |
18 |
Correct |
10 ms |
11544 KB |
Output is correct |
19 |
Correct |
10 ms |
11164 KB |
Output is correct |
20 |
Correct |
28 ms |
13380 KB |
Output is correct |
21 |
Correct |
29 ms |
13260 KB |
Output is correct |
22 |
Correct |
5 ms |
9716 KB |
Output is correct |
23 |
Correct |
9 ms |
11012 KB |
Output is correct |
24 |
Correct |
10 ms |
10964 KB |
Output is correct |
25 |
Correct |
5 ms |
9684 KB |
Output is correct |
26 |
Correct |
5 ms |
9684 KB |
Output is correct |
27 |
Correct |
10 ms |
11604 KB |
Output is correct |
28 |
Correct |
10 ms |
11092 KB |
Output is correct |
29 |
Correct |
11 ms |
11184 KB |
Output is correct |
30 |
Correct |
10 ms |
11092 KB |
Output is correct |
31 |
Correct |
5 ms |
9720 KB |
Output is correct |
32 |
Correct |
5 ms |
9684 KB |
Output is correct |
33 |
Correct |
5 ms |
9684 KB |
Output is correct |
34 |
Correct |
5 ms |
9684 KB |
Output is correct |
35 |
Correct |
5 ms |
9684 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
110 ms |
37520 KB |
Output is correct |
2 |
Correct |
5 ms |
9684 KB |
Output is correct |
3 |
Correct |
105 ms |
37264 KB |
Output is correct |
4 |
Correct |
116 ms |
36668 KB |
Output is correct |
5 |
Correct |
88 ms |
35428 KB |
Output is correct |
6 |
Correct |
116 ms |
36316 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
91 ms |
30244 KB |
Output is correct |
2 |
Correct |
114 ms |
26144 KB |
Output is correct |
3 |
Correct |
102 ms |
25724 KB |
Output is correct |
4 |
Correct |
103 ms |
25864 KB |
Output is correct |
5 |
Correct |
108 ms |
25896 KB |
Output is correct |
6 |
Correct |
91 ms |
30444 KB |
Output is correct |
7 |
Correct |
93 ms |
30480 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
91 ms |
30244 KB |
Output is correct |
2 |
Correct |
114 ms |
26144 KB |
Output is correct |
3 |
Correct |
102 ms |
25724 KB |
Output is correct |
4 |
Correct |
103 ms |
25864 KB |
Output is correct |
5 |
Correct |
108 ms |
25896 KB |
Output is correct |
6 |
Correct |
91 ms |
30444 KB |
Output is correct |
7 |
Correct |
93 ms |
30480 KB |
Output is correct |
8 |
Correct |
87 ms |
30700 KB |
Output is correct |
9 |
Correct |
94 ms |
30736 KB |
Output is correct |
10 |
Correct |
79 ms |
35288 KB |
Output is correct |
11 |
Correct |
87 ms |
35204 KB |
Output is correct |
12 |
Correct |
73 ms |
25268 KB |
Output is correct |
13 |
Correct |
70 ms |
25300 KB |
Output is correct |
14 |
Correct |
94 ms |
24616 KB |
Output is correct |
15 |
Correct |
97 ms |
24652 KB |
Output is correct |
16 |
Correct |
109 ms |
25984 KB |
Output is correct |
17 |
Correct |
110 ms |
25904 KB |
Output is correct |
18 |
Correct |
107 ms |
25800 KB |
Output is correct |
19 |
Correct |
105 ms |
26060 KB |
Output is correct |
20 |
Correct |
88 ms |
30668 KB |
Output is correct |
21 |
Correct |
90 ms |
30724 KB |
Output is correct |
22 |
Correct |
94 ms |
30624 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
5 ms |
9724 KB |
Output is correct |
2 |
Correct |
12 ms |
11140 KB |
Output is correct |
3 |
Correct |
10 ms |
10964 KB |
Output is correct |
4 |
Correct |
5 ms |
9684 KB |
Output is correct |
5 |
Correct |
5 ms |
9684 KB |
Output is correct |
6 |
Correct |
11 ms |
11528 KB |
Output is correct |
7 |
Correct |
11 ms |
11152 KB |
Output is correct |
8 |
Correct |
9 ms |
11012 KB |
Output is correct |
9 |
Correct |
10 ms |
11092 KB |
Output is correct |
10 |
Correct |
5 ms |
9684 KB |
Output is correct |
11 |
Correct |
5 ms |
9684 KB |
Output is correct |
12 |
Correct |
5 ms |
9724 KB |
Output is correct |
13 |
Correct |
5 ms |
9684 KB |
Output is correct |
14 |
Correct |
5 ms |
9684 KB |
Output is correct |
15 |
Correct |
27 ms |
12716 KB |
Output is correct |
16 |
Correct |
33 ms |
12816 KB |
Output is correct |
17 |
Correct |
26 ms |
12756 KB |
Output is correct |
18 |
Correct |
10 ms |
11544 KB |
Output is correct |
19 |
Correct |
10 ms |
11164 KB |
Output is correct |
20 |
Correct |
28 ms |
13380 KB |
Output is correct |
21 |
Correct |
29 ms |
13260 KB |
Output is correct |
22 |
Correct |
5 ms |
9716 KB |
Output is correct |
23 |
Correct |
9 ms |
11012 KB |
Output is correct |
24 |
Correct |
10 ms |
10964 KB |
Output is correct |
25 |
Correct |
5 ms |
9684 KB |
Output is correct |
26 |
Correct |
5 ms |
9684 KB |
Output is correct |
27 |
Correct |
10 ms |
11604 KB |
Output is correct |
28 |
Correct |
10 ms |
11092 KB |
Output is correct |
29 |
Correct |
11 ms |
11184 KB |
Output is correct |
30 |
Correct |
10 ms |
11092 KB |
Output is correct |
31 |
Correct |
5 ms |
9720 KB |
Output is correct |
32 |
Correct |
5 ms |
9684 KB |
Output is correct |
33 |
Correct |
5 ms |
9684 KB |
Output is correct |
34 |
Correct |
5 ms |
9684 KB |
Output is correct |
35 |
Correct |
5 ms |
9684 KB |
Output is correct |
36 |
Correct |
110 ms |
37520 KB |
Output is correct |
37 |
Correct |
5 ms |
9684 KB |
Output is correct |
38 |
Correct |
105 ms |
37264 KB |
Output is correct |
39 |
Correct |
116 ms |
36668 KB |
Output is correct |
40 |
Correct |
88 ms |
35428 KB |
Output is correct |
41 |
Correct |
116 ms |
36316 KB |
Output is correct |
42 |
Correct |
91 ms |
30244 KB |
Output is correct |
43 |
Correct |
114 ms |
26144 KB |
Output is correct |
44 |
Correct |
102 ms |
25724 KB |
Output is correct |
45 |
Correct |
103 ms |
25864 KB |
Output is correct |
46 |
Correct |
108 ms |
25896 KB |
Output is correct |
47 |
Correct |
91 ms |
30444 KB |
Output is correct |
48 |
Correct |
93 ms |
30480 KB |
Output is correct |
49 |
Correct |
87 ms |
30700 KB |
Output is correct |
50 |
Correct |
94 ms |
30736 KB |
Output is correct |
51 |
Correct |
79 ms |
35288 KB |
Output is correct |
52 |
Correct |
87 ms |
35204 KB |
Output is correct |
53 |
Correct |
73 ms |
25268 KB |
Output is correct |
54 |
Correct |
70 ms |
25300 KB |
Output is correct |
55 |
Correct |
94 ms |
24616 KB |
Output is correct |
56 |
Correct |
97 ms |
24652 KB |
Output is correct |
57 |
Correct |
109 ms |
25984 KB |
Output is correct |
58 |
Correct |
110 ms |
25904 KB |
Output is correct |
59 |
Correct |
107 ms |
25800 KB |
Output is correct |
60 |
Correct |
105 ms |
26060 KB |
Output is correct |
61 |
Correct |
88 ms |
30668 KB |
Output is correct |
62 |
Correct |
90 ms |
30724 KB |
Output is correct |
63 |
Correct |
94 ms |
30624 KB |
Output is correct |
64 |
Correct |
99 ms |
31608 KB |
Output is correct |
65 |
Correct |
142 ms |
26956 KB |
Output is correct |
66 |
Correct |
117 ms |
25548 KB |
Output is correct |
67 |
Correct |
117 ms |
25408 KB |
Output is correct |
68 |
Correct |
68 ms |
24396 KB |
Output is correct |
69 |
Correct |
72 ms |
24324 KB |
Output is correct |
70 |
Correct |
101 ms |
31868 KB |
Output is correct |
71 |
Correct |
87 ms |
30532 KB |
Output is correct |
72 |
Correct |
5 ms |
9684 KB |
Output is correct |
73 |
Correct |
10 ms |
11028 KB |
Output is correct |
74 |
Correct |
10 ms |
11036 KB |
Output is correct |
75 |
Correct |
5 ms |
9720 KB |
Output is correct |
76 |
Correct |
5 ms |
9724 KB |
Output is correct |
77 |
Correct |
10 ms |
11528 KB |
Output is correct |
78 |
Correct |
10 ms |
11092 KB |
Output is correct |
79 |
Correct |
9 ms |
11020 KB |
Output is correct |
80 |
Correct |
10 ms |
11016 KB |
Output is correct |
81 |
Correct |
5 ms |
9684 KB |
Output is correct |
82 |
Correct |
5 ms |
9664 KB |
Output is correct |
83 |
Correct |
5 ms |
9724 KB |
Output is correct |
84 |
Correct |
5 ms |
9728 KB |
Output is correct |
85 |
Correct |
5 ms |
9684 KB |
Output is correct |
86 |
Correct |
25 ms |
12616 KB |
Output is correct |
87 |
Correct |
25 ms |
12676 KB |
Output is correct |
88 |
Correct |
27 ms |
12728 KB |
Output is correct |
89 |
Correct |
11 ms |
11592 KB |
Output is correct |
90 |
Correct |
10 ms |
11220 KB |
Output is correct |
91 |
Correct |
26 ms |
13340 KB |
Output is correct |
92 |
Correct |
29 ms |
13268 KB |
Output is correct |
93 |
Correct |
5 ms |
9684 KB |
Output is correct |
94 |
Correct |
110 ms |
37548 KB |
Output is correct |
95 |
Correct |
103 ms |
37264 KB |
Output is correct |
96 |
Correct |
100 ms |
36612 KB |
Output is correct |
97 |
Correct |
89 ms |
35404 KB |
Output is correct |
98 |
Correct |
81 ms |
36292 KB |
Output is correct |
99 |
Correct |
110 ms |
25832 KB |
Output is correct |
100 |
Correct |
109 ms |
25796 KB |
Output is correct |
101 |
Correct |
109 ms |
26044 KB |
Output is correct |
102 |
Correct |
98 ms |
26084 KB |
Output is correct |
103 |
Correct |
86 ms |
30412 KB |
Output is correct |
104 |
Correct |
89 ms |
30784 KB |
Output is correct |
105 |
Correct |
86 ms |
30332 KB |
Output is correct |
106 |
Correct |
90 ms |
30924 KB |
Output is correct |
107 |
Correct |
100 ms |
30656 KB |
Output is correct |
108 |
Correct |
78 ms |
35220 KB |
Output is correct |
109 |
Correct |
84 ms |
35188 KB |
Output is correct |
110 |
Correct |
80 ms |
25228 KB |
Output is correct |
111 |
Correct |
73 ms |
25336 KB |
Output is correct |
112 |
Correct |
96 ms |
24524 KB |
Output is correct |
113 |
Correct |
96 ms |
24580 KB |
Output is correct |