# |
Submission time |
Handle |
Problem |
Language |
Result |
Execution time |
Memory |
378287 |
2021-03-16T11:51:17 Z |
Sara |
Railway (BOI17_railway) |
C++14 |
|
278 ms |
66152 KB |
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef long double ld;
#define pb push_back
#define F first
#define S second
const int N = 300000 + 5;
const int LOG = 30;
int n, m, k;
vector < pair <int, int> > g[N];
int par[LOG][N], h[N];
vector <int> ans;
set <int> st[N];
vector <int> out[N];
void dfs(int v, int pr){
for (auto it : g[v]){
int u = it.F;
if (u == pr) continue;
par[0][u] = v;
h[u] = h[v] + 1;
dfs(u, v);
}
return;
}
inline void pre(){
for (int i = 1; i < LOG; i ++){
for (int v = 1; v <= n; v ++){
par[i][v] = par[i - 1][par[i - 1][v]];
}
}
return;
}
inline int get_par(int v, int dif){
for (int i = 0; i < LOG; i ++){
if ((dif >> i & 1)){
v = par[i][v];
}
}
return v;
}
inline int LCA(int u, int v){
if (h[v] < h[u]) swap(u, v);
v = get_par(v, h[v] - h[u]);
if (u == v) return v;
for (int i = LOG - 1; i >= 0; i --){
if (par[i][u] != par[i][v]){
u = par[i][u];
v = par[i][v];
}
}
return par[0][v];
}
inline void merge(int pr, int v){
if ((int)st[pr].size() < (int)st[v].size()){
swap(st[pr], st[v]);
}
for (int col : st[v]){
st[pr].insert(col);
}
st[v].clear();
return;
}
inline void del(int v){
for (int col : out[v]){
st[v].erase(st[v].lower_bound(col));
}
return;
}
void dfsCalc(int v, int pr){
for (auto it : g[v]){
int u = it.F;
int id = it.S;
if (id == pr) continue;
dfsCalc(u, id);
merge(v, u);
}
del(v);
if ((v != 1) && (k <= (int)st[v].size())) ans.pb(pr);
return;
}
int main() {
ios_base::sync_with_stdio(0), cin.tie(0); cout.tie(0);
cin >> n >> m >> k;
for (int i = 1; i < n; i ++){
int u, v;
cin >> u >> v;
g[u].pb({v, i}); g[v].pb({u, i});
}
dfs(1, 0); pre();
for (int i = 1; i <= m; i ++){
int sz, v, lca = 0;
cin >> sz;
vector <int> C = {};
for (int j = 0; j < sz; j ++){
int v;
cin >> v;
C.pb(v);
if (lca == 0){
lca = C[j];
}
else {
lca = LCA(lca, C[j]);
}
}
out[lca].pb(i);
for (int u: C){
st[u].insert(i);
}
//cout << "dbg " << i << ' ' << lca << '\n';
}
dfsCalc(1, 0);
sort(ans.begin(), ans.end());
cout << (int)ans.size() << '\n';
for (int i : ans) cout << i << ' ';
return 0;
}
Compilation message
railway.cpp: In function 'int main()':
railway.cpp:106:17: warning: unused variable 'v' [-Wunused-variable]
106 | int sz, v, lca = 0;
| ^
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
19 ms |
28652 KB |
Output is correct |
2 |
Correct |
24 ms |
30444 KB |
Output is correct |
3 |
Correct |
24 ms |
30444 KB |
Output is correct |
4 |
Correct |
19 ms |
28652 KB |
Output is correct |
5 |
Correct |
19 ms |
28652 KB |
Output is correct |
6 |
Correct |
25 ms |
31212 KB |
Output is correct |
7 |
Correct |
24 ms |
30572 KB |
Output is correct |
8 |
Correct |
24 ms |
30444 KB |
Output is correct |
9 |
Correct |
24 ms |
30444 KB |
Output is correct |
10 |
Correct |
18 ms |
28652 KB |
Output is correct |
11 |
Correct |
19 ms |
28652 KB |
Output is correct |
12 |
Correct |
18 ms |
28652 KB |
Output is correct |
13 |
Correct |
18 ms |
28652 KB |
Output is correct |
14 |
Correct |
18 ms |
28652 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
19 ms |
28652 KB |
Output is correct |
2 |
Correct |
24 ms |
30444 KB |
Output is correct |
3 |
Correct |
24 ms |
30444 KB |
Output is correct |
4 |
Correct |
19 ms |
28652 KB |
Output is correct |
5 |
Correct |
19 ms |
28652 KB |
Output is correct |
6 |
Correct |
25 ms |
31212 KB |
Output is correct |
7 |
Correct |
24 ms |
30572 KB |
Output is correct |
8 |
Correct |
24 ms |
30444 KB |
Output is correct |
9 |
Correct |
24 ms |
30444 KB |
Output is correct |
10 |
Correct |
18 ms |
28652 KB |
Output is correct |
11 |
Correct |
19 ms |
28652 KB |
Output is correct |
12 |
Correct |
18 ms |
28652 KB |
Output is correct |
13 |
Correct |
18 ms |
28652 KB |
Output is correct |
14 |
Correct |
18 ms |
28652 KB |
Output is correct |
15 |
Correct |
64 ms |
34028 KB |
Output is correct |
16 |
Correct |
63 ms |
34028 KB |
Output is correct |
17 |
Correct |
66 ms |
34028 KB |
Output is correct |
18 |
Correct |
26 ms |
31212 KB |
Output is correct |
19 |
Correct |
25 ms |
30572 KB |
Output is correct |
20 |
Correct |
69 ms |
35100 KB |
Output is correct |
21 |
Correct |
69 ms |
35052 KB |
Output is correct |
22 |
Correct |
18 ms |
28652 KB |
Output is correct |
23 |
Correct |
24 ms |
30444 KB |
Output is correct |
24 |
Correct |
25 ms |
30464 KB |
Output is correct |
25 |
Correct |
19 ms |
28652 KB |
Output is correct |
26 |
Correct |
18 ms |
28652 KB |
Output is correct |
27 |
Correct |
25 ms |
31212 KB |
Output is correct |
28 |
Correct |
24 ms |
30572 KB |
Output is correct |
29 |
Correct |
24 ms |
30444 KB |
Output is correct |
30 |
Correct |
24 ms |
30464 KB |
Output is correct |
31 |
Correct |
19 ms |
28652 KB |
Output is correct |
32 |
Correct |
19 ms |
28652 KB |
Output is correct |
33 |
Correct |
20 ms |
28652 KB |
Output is correct |
34 |
Correct |
22 ms |
28652 KB |
Output is correct |
35 |
Correct |
19 ms |
28652 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
219 ms |
64876 KB |
Output is correct |
2 |
Correct |
21 ms |
28780 KB |
Output is correct |
3 |
Correct |
207 ms |
64492 KB |
Output is correct |
4 |
Correct |
201 ms |
63852 KB |
Output is correct |
5 |
Correct |
200 ms |
63852 KB |
Output is correct |
6 |
Correct |
169 ms |
66152 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
161 ms |
56556 KB |
Output is correct |
2 |
Correct |
211 ms |
50668 KB |
Output is correct |
3 |
Correct |
236 ms |
50280 KB |
Output is correct |
4 |
Correct |
237 ms |
50024 KB |
Output is correct |
5 |
Correct |
242 ms |
49896 KB |
Output is correct |
6 |
Correct |
165 ms |
56684 KB |
Output is correct |
7 |
Correct |
163 ms |
56684 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
161 ms |
56556 KB |
Output is correct |
2 |
Correct |
211 ms |
50668 KB |
Output is correct |
3 |
Correct |
236 ms |
50280 KB |
Output is correct |
4 |
Correct |
237 ms |
50024 KB |
Output is correct |
5 |
Correct |
242 ms |
49896 KB |
Output is correct |
6 |
Correct |
165 ms |
56684 KB |
Output is correct |
7 |
Correct |
163 ms |
56684 KB |
Output is correct |
8 |
Correct |
159 ms |
56556 KB |
Output is correct |
9 |
Correct |
154 ms |
56556 KB |
Output is correct |
10 |
Correct |
146 ms |
63844 KB |
Output is correct |
11 |
Correct |
147 ms |
63972 KB |
Output is correct |
12 |
Correct |
113 ms |
49516 KB |
Output is correct |
13 |
Correct |
117 ms |
49412 KB |
Output is correct |
14 |
Correct |
178 ms |
49260 KB |
Output is correct |
15 |
Correct |
179 ms |
49388 KB |
Output is correct |
16 |
Correct |
244 ms |
49896 KB |
Output is correct |
17 |
Correct |
258 ms |
50280 KB |
Output is correct |
18 |
Correct |
236 ms |
50024 KB |
Output is correct |
19 |
Correct |
222 ms |
50668 KB |
Output is correct |
20 |
Correct |
162 ms |
56940 KB |
Output is correct |
21 |
Correct |
169 ms |
57064 KB |
Output is correct |
22 |
Correct |
162 ms |
56940 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
19 ms |
28652 KB |
Output is correct |
2 |
Correct |
24 ms |
30444 KB |
Output is correct |
3 |
Correct |
24 ms |
30444 KB |
Output is correct |
4 |
Correct |
19 ms |
28652 KB |
Output is correct |
5 |
Correct |
19 ms |
28652 KB |
Output is correct |
6 |
Correct |
25 ms |
31212 KB |
Output is correct |
7 |
Correct |
24 ms |
30572 KB |
Output is correct |
8 |
Correct |
24 ms |
30444 KB |
Output is correct |
9 |
Correct |
24 ms |
30444 KB |
Output is correct |
10 |
Correct |
18 ms |
28652 KB |
Output is correct |
11 |
Correct |
19 ms |
28652 KB |
Output is correct |
12 |
Correct |
18 ms |
28652 KB |
Output is correct |
13 |
Correct |
18 ms |
28652 KB |
Output is correct |
14 |
Correct |
18 ms |
28652 KB |
Output is correct |
15 |
Correct |
64 ms |
34028 KB |
Output is correct |
16 |
Correct |
63 ms |
34028 KB |
Output is correct |
17 |
Correct |
66 ms |
34028 KB |
Output is correct |
18 |
Correct |
26 ms |
31212 KB |
Output is correct |
19 |
Correct |
25 ms |
30572 KB |
Output is correct |
20 |
Correct |
69 ms |
35100 KB |
Output is correct |
21 |
Correct |
69 ms |
35052 KB |
Output is correct |
22 |
Correct |
18 ms |
28652 KB |
Output is correct |
23 |
Correct |
24 ms |
30444 KB |
Output is correct |
24 |
Correct |
25 ms |
30464 KB |
Output is correct |
25 |
Correct |
19 ms |
28652 KB |
Output is correct |
26 |
Correct |
18 ms |
28652 KB |
Output is correct |
27 |
Correct |
25 ms |
31212 KB |
Output is correct |
28 |
Correct |
24 ms |
30572 KB |
Output is correct |
29 |
Correct |
24 ms |
30444 KB |
Output is correct |
30 |
Correct |
24 ms |
30464 KB |
Output is correct |
31 |
Correct |
19 ms |
28652 KB |
Output is correct |
32 |
Correct |
19 ms |
28652 KB |
Output is correct |
33 |
Correct |
20 ms |
28652 KB |
Output is correct |
34 |
Correct |
22 ms |
28652 KB |
Output is correct |
35 |
Correct |
19 ms |
28652 KB |
Output is correct |
36 |
Correct |
219 ms |
64876 KB |
Output is correct |
37 |
Correct |
21 ms |
28780 KB |
Output is correct |
38 |
Correct |
207 ms |
64492 KB |
Output is correct |
39 |
Correct |
201 ms |
63852 KB |
Output is correct |
40 |
Correct |
200 ms |
63852 KB |
Output is correct |
41 |
Correct |
169 ms |
66152 KB |
Output is correct |
42 |
Correct |
161 ms |
56556 KB |
Output is correct |
43 |
Correct |
211 ms |
50668 KB |
Output is correct |
44 |
Correct |
236 ms |
50280 KB |
Output is correct |
45 |
Correct |
237 ms |
50024 KB |
Output is correct |
46 |
Correct |
242 ms |
49896 KB |
Output is correct |
47 |
Correct |
165 ms |
56684 KB |
Output is correct |
48 |
Correct |
163 ms |
56684 KB |
Output is correct |
49 |
Correct |
159 ms |
56556 KB |
Output is correct |
50 |
Correct |
154 ms |
56556 KB |
Output is correct |
51 |
Correct |
146 ms |
63844 KB |
Output is correct |
52 |
Correct |
147 ms |
63972 KB |
Output is correct |
53 |
Correct |
113 ms |
49516 KB |
Output is correct |
54 |
Correct |
117 ms |
49412 KB |
Output is correct |
55 |
Correct |
178 ms |
49260 KB |
Output is correct |
56 |
Correct |
179 ms |
49388 KB |
Output is correct |
57 |
Correct |
244 ms |
49896 KB |
Output is correct |
58 |
Correct |
258 ms |
50280 KB |
Output is correct |
59 |
Correct |
236 ms |
50024 KB |
Output is correct |
60 |
Correct |
222 ms |
50668 KB |
Output is correct |
61 |
Correct |
162 ms |
56940 KB |
Output is correct |
62 |
Correct |
169 ms |
57064 KB |
Output is correct |
63 |
Correct |
162 ms |
56940 KB |
Output is correct |
64 |
Correct |
178 ms |
57288 KB |
Output is correct |
65 |
Correct |
278 ms |
49644 KB |
Output is correct |
66 |
Correct |
211 ms |
49388 KB |
Output is correct |
67 |
Correct |
185 ms |
49388 KB |
Output is correct |
68 |
Correct |
103 ms |
47724 KB |
Output is correct |
69 |
Correct |
101 ms |
47724 KB |
Output is correct |
70 |
Correct |
177 ms |
57452 KB |
Output is correct |
71 |
Correct |
167 ms |
56428 KB |
Output is correct |
72 |
Correct |
19 ms |
28652 KB |
Output is correct |
73 |
Correct |
25 ms |
30444 KB |
Output is correct |
74 |
Correct |
25 ms |
30444 KB |
Output is correct |
75 |
Correct |
19 ms |
28652 KB |
Output is correct |
76 |
Correct |
18 ms |
28652 KB |
Output is correct |
77 |
Correct |
25 ms |
31212 KB |
Output is correct |
78 |
Correct |
24 ms |
30572 KB |
Output is correct |
79 |
Correct |
23 ms |
30444 KB |
Output is correct |
80 |
Correct |
24 ms |
30444 KB |
Output is correct |
81 |
Correct |
19 ms |
28652 KB |
Output is correct |
82 |
Correct |
19 ms |
28652 KB |
Output is correct |
83 |
Correct |
19 ms |
28652 KB |
Output is correct |
84 |
Correct |
19 ms |
28652 KB |
Output is correct |
85 |
Correct |
20 ms |
28652 KB |
Output is correct |
86 |
Correct |
67 ms |
34028 KB |
Output is correct |
87 |
Correct |
62 ms |
34028 KB |
Output is correct |
88 |
Correct |
64 ms |
34028 KB |
Output is correct |
89 |
Correct |
26 ms |
31212 KB |
Output is correct |
90 |
Correct |
25 ms |
30572 KB |
Output is correct |
91 |
Correct |
70 ms |
35180 KB |
Output is correct |
92 |
Correct |
70 ms |
35052 KB |
Output is correct |
93 |
Correct |
19 ms |
28652 KB |
Output is correct |
94 |
Correct |
212 ms |
64744 KB |
Output is correct |
95 |
Correct |
215 ms |
64624 KB |
Output is correct |
96 |
Correct |
205 ms |
63852 KB |
Output is correct |
97 |
Correct |
185 ms |
63852 KB |
Output is correct |
98 |
Correct |
173 ms |
66140 KB |
Output is correct |
99 |
Correct |
258 ms |
49896 KB |
Output is correct |
100 |
Correct |
252 ms |
50024 KB |
Output is correct |
101 |
Correct |
247 ms |
50152 KB |
Output is correct |
102 |
Correct |
205 ms |
50540 KB |
Output is correct |
103 |
Correct |
163 ms |
56684 KB |
Output is correct |
104 |
Correct |
166 ms |
57064 KB |
Output is correct |
105 |
Correct |
158 ms |
56556 KB |
Output is correct |
106 |
Correct |
158 ms |
56640 KB |
Output is correct |
107 |
Correct |
160 ms |
56556 KB |
Output is correct |
108 |
Correct |
147 ms |
63844 KB |
Output is correct |
109 |
Correct |
138 ms |
63844 KB |
Output is correct |
110 |
Correct |
116 ms |
49516 KB |
Output is correct |
111 |
Correct |
111 ms |
49516 KB |
Output is correct |
112 |
Correct |
172 ms |
49260 KB |
Output is correct |
113 |
Correct |
178 ms |
49260 KB |
Output is correct |