# |
Submission time |
Handle |
Problem |
Language |
Result |
Execution time |
Memory |
732881 |
2023-04-29T11:21:53 Z |
Trunkty |
Railway (BOI17_railway) |
C++14 |
|
285 ms |
74444 KB |
#include <bits/extc++.h>
using namespace std;
typedef long long ll;
#define int ll
int n,m,k;
vector<vector<int>> roads[100005];
int jump[100005][21],dep[100005];
vector<int> toadd[100005],torem[100005];
set<int> s[100005];
int roadid[100005];
vector<int> ans;
void dfs(int x, int p){
for(vector<int> i:roads[x]){
if(i[0]!=p){
dep[i[0]] = dep[x]+1;
jump[i[0]][0] = x;
roadid[i[0]] = i[1];
dfs(i[0],x);
}
}
}
int lca(int a, int b){
if(dep[a]>dep[b]){
swap(a,b);
}
for(int j=20;j>=0;j--){
if(dep[b]-(1<<j)>=dep[a]){
b = jump[b][j];
}
}
if(a==b){
return a;
}
for(int j=20;j>=0;j--){
if(jump[a][j]!=jump[b][j]){
a = jump[a][j];
b = jump[b][j];
}
}
return jump[a][0];
}
void dfs2(int x, int p){
for(int i:toadd[x]){
s[x].insert(i);
}
for(vector<int> i:roads[x]){
if(i[0]!=p){
dfs2(i[0],x);
if(s[i[0]].size()>s[x].size()){
swap(s[x],s[i[0]]);
}
for(int j:s[i[0]]){
s[x].insert(j);
}
}
}
for(int i:torem[x]){
s[x].erase(i);
}
if(x==1){
return;
}
if(s[x].size()>=k){
ans.push_back(roadid[x]);
}
}
signed main(){
ios_base::sync_with_stdio(false);
cin.tie(NULL);
cin >> n >> m >> k;
for(int i=1;i<=n-1;i++){
int a,b;
cin >> a >> b;
roads[a].push_back({b,i});
roads[b].push_back({a,i});
}
dfs(1,-1);
for(int j=1;j<=20;j++){
for(int i=1;i<=n;i++){
jump[i][j] = jump[jump[i][j-1]][j-1];
}
}
for(int i=1;i<=m;i++){
int a;
cin >> a;
vector<int> v;
for(int j=1;j<=a;j++){
int b;
cin >> b;
v.push_back(b);
toadd[b].push_back(i);
}
while(v.size()>=2){
int b = v.back();
v.pop_back();
int c = v.back();
v.pop_back();
v.push_back(lca(b,c));
}
torem[v[0]].push_back(i);
}
dfs2(1,-1);
sort(ans.begin(),ans.end());
cout << ans.size() << "\n";
for(int i:ans){
cout << i << " ";
}
return 0;
}
Compilation message
railway.cpp: In function 'void dfs2(ll, ll)':
railway.cpp:67:19: warning: comparison of integer expressions of different signedness: 'std::set<long long int>::size_type' {aka 'long unsigned int'} and 'll' {aka 'long long int'} [-Wsign-compare]
67 | if(s[x].size()>=k){
| ~~~~~~~~~~~^~~
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
8 ms |
12204 KB |
Output is correct |
2 |
Correct |
19 ms |
15316 KB |
Output is correct |
3 |
Correct |
19 ms |
15316 KB |
Output is correct |
4 |
Correct |
7 ms |
12072 KB |
Output is correct |
5 |
Correct |
7 ms |
11988 KB |
Output is correct |
6 |
Correct |
20 ms |
16316 KB |
Output is correct |
7 |
Correct |
18 ms |
15536 KB |
Output is correct |
8 |
Correct |
17 ms |
15392 KB |
Output is correct |
9 |
Correct |
20 ms |
15472 KB |
Output is correct |
10 |
Correct |
8 ms |
12076 KB |
Output is correct |
11 |
Correct |
8 ms |
12080 KB |
Output is correct |
12 |
Correct |
9 ms |
12104 KB |
Output is correct |
13 |
Correct |
9 ms |
12028 KB |
Output is correct |
14 |
Correct |
8 ms |
12048 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
8 ms |
12204 KB |
Output is correct |
2 |
Correct |
19 ms |
15316 KB |
Output is correct |
3 |
Correct |
19 ms |
15316 KB |
Output is correct |
4 |
Correct |
7 ms |
12072 KB |
Output is correct |
5 |
Correct |
7 ms |
11988 KB |
Output is correct |
6 |
Correct |
20 ms |
16316 KB |
Output is correct |
7 |
Correct |
18 ms |
15536 KB |
Output is correct |
8 |
Correct |
17 ms |
15392 KB |
Output is correct |
9 |
Correct |
20 ms |
15472 KB |
Output is correct |
10 |
Correct |
8 ms |
12076 KB |
Output is correct |
11 |
Correct |
8 ms |
12080 KB |
Output is correct |
12 |
Correct |
9 ms |
12104 KB |
Output is correct |
13 |
Correct |
9 ms |
12028 KB |
Output is correct |
14 |
Correct |
8 ms |
12048 KB |
Output is correct |
15 |
Correct |
59 ms |
22288 KB |
Output is correct |
16 |
Correct |
56 ms |
22248 KB |
Output is correct |
17 |
Correct |
58 ms |
22192 KB |
Output is correct |
18 |
Correct |
21 ms |
16496 KB |
Output is correct |
19 |
Correct |
18 ms |
15544 KB |
Output is correct |
20 |
Correct |
55 ms |
21728 KB |
Output is correct |
21 |
Correct |
57 ms |
21752 KB |
Output is correct |
22 |
Correct |
7 ms |
11988 KB |
Output is correct |
23 |
Correct |
17 ms |
15412 KB |
Output is correct |
24 |
Correct |
17 ms |
15420 KB |
Output is correct |
25 |
Correct |
7 ms |
11988 KB |
Output is correct |
26 |
Correct |
9 ms |
11988 KB |
Output is correct |
27 |
Correct |
21 ms |
16432 KB |
Output is correct |
28 |
Correct |
16 ms |
15544 KB |
Output is correct |
29 |
Correct |
17 ms |
15400 KB |
Output is correct |
30 |
Correct |
15 ms |
15488 KB |
Output is correct |
31 |
Correct |
8 ms |
11988 KB |
Output is correct |
32 |
Correct |
9 ms |
12076 KB |
Output is correct |
33 |
Correct |
9 ms |
12076 KB |
Output is correct |
34 |
Correct |
7 ms |
11988 KB |
Output is correct |
35 |
Correct |
9 ms |
11988 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
234 ms |
72744 KB |
Output is correct |
2 |
Correct |
7 ms |
11988 KB |
Output is correct |
3 |
Correct |
217 ms |
72376 KB |
Output is correct |
4 |
Correct |
254 ms |
71768 KB |
Output is correct |
5 |
Correct |
199 ms |
71388 KB |
Output is correct |
6 |
Correct |
185 ms |
74444 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
227 ms |
61260 KB |
Output is correct |
2 |
Correct |
222 ms |
55548 KB |
Output is correct |
3 |
Correct |
237 ms |
61656 KB |
Output is correct |
4 |
Correct |
258 ms |
61520 KB |
Output is correct |
5 |
Correct |
215 ms |
61696 KB |
Output is correct |
6 |
Correct |
177 ms |
61648 KB |
Output is correct |
7 |
Correct |
182 ms |
61276 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
227 ms |
61260 KB |
Output is correct |
2 |
Correct |
222 ms |
55548 KB |
Output is correct |
3 |
Correct |
237 ms |
61656 KB |
Output is correct |
4 |
Correct |
258 ms |
61520 KB |
Output is correct |
5 |
Correct |
215 ms |
61696 KB |
Output is correct |
6 |
Correct |
177 ms |
61648 KB |
Output is correct |
7 |
Correct |
182 ms |
61276 KB |
Output is correct |
8 |
Correct |
206 ms |
60912 KB |
Output is correct |
9 |
Correct |
187 ms |
60900 KB |
Output is correct |
10 |
Correct |
165 ms |
71220 KB |
Output is correct |
11 |
Correct |
157 ms |
71236 KB |
Output is correct |
12 |
Correct |
136 ms |
49980 KB |
Output is correct |
13 |
Correct |
152 ms |
49980 KB |
Output is correct |
14 |
Correct |
213 ms |
56400 KB |
Output is correct |
15 |
Correct |
204 ms |
56644 KB |
Output is correct |
16 |
Correct |
245 ms |
62804 KB |
Output is correct |
17 |
Correct |
225 ms |
63044 KB |
Output is correct |
18 |
Correct |
207 ms |
60824 KB |
Output is correct |
19 |
Correct |
213 ms |
56268 KB |
Output is correct |
20 |
Correct |
180 ms |
62296 KB |
Output is correct |
21 |
Correct |
201 ms |
62412 KB |
Output is correct |
22 |
Correct |
183 ms |
61924 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
8 ms |
12204 KB |
Output is correct |
2 |
Correct |
19 ms |
15316 KB |
Output is correct |
3 |
Correct |
19 ms |
15316 KB |
Output is correct |
4 |
Correct |
7 ms |
12072 KB |
Output is correct |
5 |
Correct |
7 ms |
11988 KB |
Output is correct |
6 |
Correct |
20 ms |
16316 KB |
Output is correct |
7 |
Correct |
18 ms |
15536 KB |
Output is correct |
8 |
Correct |
17 ms |
15392 KB |
Output is correct |
9 |
Correct |
20 ms |
15472 KB |
Output is correct |
10 |
Correct |
8 ms |
12076 KB |
Output is correct |
11 |
Correct |
8 ms |
12080 KB |
Output is correct |
12 |
Correct |
9 ms |
12104 KB |
Output is correct |
13 |
Correct |
9 ms |
12028 KB |
Output is correct |
14 |
Correct |
8 ms |
12048 KB |
Output is correct |
15 |
Correct |
59 ms |
22288 KB |
Output is correct |
16 |
Correct |
56 ms |
22248 KB |
Output is correct |
17 |
Correct |
58 ms |
22192 KB |
Output is correct |
18 |
Correct |
21 ms |
16496 KB |
Output is correct |
19 |
Correct |
18 ms |
15544 KB |
Output is correct |
20 |
Correct |
55 ms |
21728 KB |
Output is correct |
21 |
Correct |
57 ms |
21752 KB |
Output is correct |
22 |
Correct |
7 ms |
11988 KB |
Output is correct |
23 |
Correct |
17 ms |
15412 KB |
Output is correct |
24 |
Correct |
17 ms |
15420 KB |
Output is correct |
25 |
Correct |
7 ms |
11988 KB |
Output is correct |
26 |
Correct |
9 ms |
11988 KB |
Output is correct |
27 |
Correct |
21 ms |
16432 KB |
Output is correct |
28 |
Correct |
16 ms |
15544 KB |
Output is correct |
29 |
Correct |
17 ms |
15400 KB |
Output is correct |
30 |
Correct |
15 ms |
15488 KB |
Output is correct |
31 |
Correct |
8 ms |
11988 KB |
Output is correct |
32 |
Correct |
9 ms |
12076 KB |
Output is correct |
33 |
Correct |
9 ms |
12076 KB |
Output is correct |
34 |
Correct |
7 ms |
11988 KB |
Output is correct |
35 |
Correct |
9 ms |
11988 KB |
Output is correct |
36 |
Correct |
234 ms |
72744 KB |
Output is correct |
37 |
Correct |
7 ms |
11988 KB |
Output is correct |
38 |
Correct |
217 ms |
72376 KB |
Output is correct |
39 |
Correct |
254 ms |
71768 KB |
Output is correct |
40 |
Correct |
199 ms |
71388 KB |
Output is correct |
41 |
Correct |
185 ms |
74444 KB |
Output is correct |
42 |
Correct |
227 ms |
61260 KB |
Output is correct |
43 |
Correct |
222 ms |
55548 KB |
Output is correct |
44 |
Correct |
237 ms |
61656 KB |
Output is correct |
45 |
Correct |
258 ms |
61520 KB |
Output is correct |
46 |
Correct |
215 ms |
61696 KB |
Output is correct |
47 |
Correct |
177 ms |
61648 KB |
Output is correct |
48 |
Correct |
182 ms |
61276 KB |
Output is correct |
49 |
Correct |
206 ms |
60912 KB |
Output is correct |
50 |
Correct |
187 ms |
60900 KB |
Output is correct |
51 |
Correct |
165 ms |
71220 KB |
Output is correct |
52 |
Correct |
157 ms |
71236 KB |
Output is correct |
53 |
Correct |
136 ms |
49980 KB |
Output is correct |
54 |
Correct |
152 ms |
49980 KB |
Output is correct |
55 |
Correct |
213 ms |
56400 KB |
Output is correct |
56 |
Correct |
204 ms |
56644 KB |
Output is correct |
57 |
Correct |
245 ms |
62804 KB |
Output is correct |
58 |
Correct |
225 ms |
63044 KB |
Output is correct |
59 |
Correct |
207 ms |
60824 KB |
Output is correct |
60 |
Correct |
213 ms |
56268 KB |
Output is correct |
61 |
Correct |
180 ms |
62296 KB |
Output is correct |
62 |
Correct |
201 ms |
62412 KB |
Output is correct |
63 |
Correct |
183 ms |
61924 KB |
Output is correct |
64 |
Correct |
212 ms |
61372 KB |
Output is correct |
65 |
Correct |
285 ms |
69080 KB |
Output is correct |
66 |
Correct |
276 ms |
64612 KB |
Output is correct |
67 |
Correct |
229 ms |
60148 KB |
Output is correct |
68 |
Correct |
140 ms |
47948 KB |
Output is correct |
69 |
Correct |
131 ms |
47948 KB |
Output is correct |
70 |
Correct |
199 ms |
62708 KB |
Output is correct |
71 |
Correct |
191 ms |
60660 KB |
Output is correct |
72 |
Correct |
8 ms |
12076 KB |
Output is correct |
73 |
Correct |
15 ms |
15420 KB |
Output is correct |
74 |
Correct |
15 ms |
15416 KB |
Output is correct |
75 |
Correct |
7 ms |
12116 KB |
Output is correct |
76 |
Correct |
7 ms |
12072 KB |
Output is correct |
77 |
Correct |
16 ms |
16384 KB |
Output is correct |
78 |
Correct |
16 ms |
15612 KB |
Output is correct |
79 |
Correct |
14 ms |
15316 KB |
Output is correct |
80 |
Correct |
14 ms |
15412 KB |
Output is correct |
81 |
Correct |
7 ms |
12092 KB |
Output is correct |
82 |
Correct |
6 ms |
11988 KB |
Output is correct |
83 |
Correct |
7 ms |
11988 KB |
Output is correct |
84 |
Correct |
6 ms |
11988 KB |
Output is correct |
85 |
Correct |
6 ms |
11988 KB |
Output is correct |
86 |
Correct |
50 ms |
22288 KB |
Output is correct |
87 |
Correct |
47 ms |
22228 KB |
Output is correct |
88 |
Correct |
47 ms |
22284 KB |
Output is correct |
89 |
Correct |
21 ms |
16500 KB |
Output is correct |
90 |
Correct |
17 ms |
15640 KB |
Output is correct |
91 |
Correct |
48 ms |
21600 KB |
Output is correct |
92 |
Correct |
50 ms |
21640 KB |
Output is correct |
93 |
Correct |
6 ms |
12076 KB |
Output is correct |
94 |
Correct |
204 ms |
72748 KB |
Output is correct |
95 |
Correct |
201 ms |
72460 KB |
Output is correct |
96 |
Correct |
195 ms |
71692 KB |
Output is correct |
97 |
Correct |
194 ms |
71352 KB |
Output is correct |
98 |
Correct |
165 ms |
74300 KB |
Output is correct |
99 |
Correct |
230 ms |
65288 KB |
Output is correct |
100 |
Correct |
229 ms |
62604 KB |
Output is correct |
101 |
Correct |
232 ms |
62880 KB |
Output is correct |
102 |
Correct |
219 ms |
56008 KB |
Output is correct |
103 |
Correct |
175 ms |
62176 KB |
Output is correct |
104 |
Correct |
200 ms |
62292 KB |
Output is correct |
105 |
Correct |
174 ms |
61592 KB |
Output is correct |
106 |
Correct |
183 ms |
61016 KB |
Output is correct |
107 |
Correct |
172 ms |
61004 KB |
Output is correct |
108 |
Correct |
183 ms |
71300 KB |
Output is correct |
109 |
Correct |
160 ms |
71236 KB |
Output is correct |
110 |
Correct |
135 ms |
50032 KB |
Output is correct |
111 |
Correct |
139 ms |
50064 KB |
Output is correct |
112 |
Correct |
198 ms |
56176 KB |
Output is correct |
113 |
Correct |
188 ms |
56232 KB |
Output is correct |