# |
Submission time |
Handle |
Problem |
Language |
Result |
Execution time |
Memory |
556742 |
2022-05-03T21:05:07 Z |
Hanksburger |
Network (BOI15_net) |
C++17 |
|
430 ms |
47724 KB |
#include <bits/stdc++.h>
using namespace std;
vector<int> adj[500005], vec;
void dfs(int u, int p)
{
if (adj[u].size()==1)
vec.push_back(u);
for (int v:adj[u])
if (v!=p)
dfs(v, u);
}
int main()
{
ios::sync_with_stdio(0);
cin.tie(0);
cout.tie(0);
int n, sz;
cin >> n;
for (int i=1; i<n; i++)
{
int u, v;
cin >> u >> v;
adj[u].push_back(v);
adj[v].push_back(u);
}
dfs(1, 0);
sz=vec.size();
cout << (sz+1)/2 << '\n';
for (int i=0; i<(sz+1)/2; i++)
cout << vec[i] << ' ' << vec[i+sz/2] << '\n';
return 0;
}
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
7 ms |
11988 KB |
Output is correct |
2 |
Correct |
8 ms |
11988 KB |
Output is correct |
3 |
Correct |
6 ms |
12024 KB |
Output is correct |
4 |
Correct |
6 ms |
12044 KB |
Output is correct |
5 |
Correct |
7 ms |
11988 KB |
Output is correct |
6 |
Correct |
6 ms |
12064 KB |
Output is correct |
7 |
Correct |
6 ms |
12064 KB |
Output is correct |
8 |
Correct |
7 ms |
11976 KB |
Output is correct |
9 |
Correct |
8 ms |
12060 KB |
Output is correct |
10 |
Correct |
8 ms |
12116 KB |
Output is correct |
11 |
Correct |
7 ms |
11988 KB |
Output is correct |
12 |
Correct |
6 ms |
11988 KB |
Output is correct |
13 |
Correct |
6 ms |
11988 KB |
Output is correct |
14 |
Correct |
7 ms |
12064 KB |
Output is correct |
15 |
Correct |
7 ms |
11988 KB |
Output is correct |
16 |
Correct |
7 ms |
12068 KB |
Output is correct |
17 |
Correct |
7 ms |
11988 KB |
Output is correct |
18 |
Correct |
6 ms |
12040 KB |
Output is correct |
19 |
Correct |
9 ms |
12064 KB |
Output is correct |
20 |
Correct |
6 ms |
12060 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
7 ms |
11988 KB |
Output is correct |
2 |
Correct |
8 ms |
11988 KB |
Output is correct |
3 |
Correct |
6 ms |
12024 KB |
Output is correct |
4 |
Correct |
6 ms |
12044 KB |
Output is correct |
5 |
Correct |
7 ms |
11988 KB |
Output is correct |
6 |
Correct |
6 ms |
12064 KB |
Output is correct |
7 |
Correct |
6 ms |
12064 KB |
Output is correct |
8 |
Correct |
7 ms |
11976 KB |
Output is correct |
9 |
Correct |
8 ms |
12060 KB |
Output is correct |
10 |
Correct |
8 ms |
12116 KB |
Output is correct |
11 |
Correct |
7 ms |
11988 KB |
Output is correct |
12 |
Correct |
6 ms |
11988 KB |
Output is correct |
13 |
Correct |
6 ms |
11988 KB |
Output is correct |
14 |
Correct |
7 ms |
12064 KB |
Output is correct |
15 |
Correct |
7 ms |
11988 KB |
Output is correct |
16 |
Correct |
7 ms |
12068 KB |
Output is correct |
17 |
Correct |
7 ms |
11988 KB |
Output is correct |
18 |
Correct |
6 ms |
12040 KB |
Output is correct |
19 |
Correct |
9 ms |
12064 KB |
Output is correct |
20 |
Correct |
6 ms |
12060 KB |
Output is correct |
21 |
Correct |
8 ms |
12064 KB |
Output is correct |
22 |
Correct |
7 ms |
12116 KB |
Output is correct |
23 |
Correct |
7 ms |
12116 KB |
Output is correct |
24 |
Correct |
7 ms |
12116 KB |
Output is correct |
25 |
Correct |
7 ms |
12116 KB |
Output is correct |
26 |
Correct |
7 ms |
12116 KB |
Output is correct |
27 |
Correct |
8 ms |
12116 KB |
Output is correct |
28 |
Correct |
7 ms |
12072 KB |
Output is correct |
29 |
Correct |
7 ms |
12116 KB |
Output is correct |
30 |
Correct |
6 ms |
12064 KB |
Output is correct |
31 |
Correct |
7 ms |
12116 KB |
Output is correct |
32 |
Correct |
7 ms |
11988 KB |
Output is correct |
33 |
Correct |
7 ms |
11988 KB |
Output is correct |
34 |
Correct |
6 ms |
11952 KB |
Output is correct |
35 |
Correct |
6 ms |
12064 KB |
Output is correct |
36 |
Correct |
6 ms |
11988 KB |
Output is correct |
37 |
Correct |
7 ms |
11988 KB |
Output is correct |
38 |
Correct |
7 ms |
12116 KB |
Output is correct |
39 |
Correct |
7 ms |
11988 KB |
Output is correct |
40 |
Correct |
8 ms |
11988 KB |
Output is correct |
41 |
Correct |
8 ms |
11988 KB |
Output is correct |
42 |
Correct |
7 ms |
11988 KB |
Output is correct |
43 |
Correct |
7 ms |
12072 KB |
Output is correct |
44 |
Correct |
7 ms |
11988 KB |
Output is correct |
45 |
Correct |
7 ms |
11956 KB |
Output is correct |
46 |
Correct |
7 ms |
11988 KB |
Output is correct |
47 |
Correct |
6 ms |
11988 KB |
Output is correct |
48 |
Correct |
7 ms |
11988 KB |
Output is correct |
49 |
Correct |
7 ms |
12080 KB |
Output is correct |
50 |
Correct |
6 ms |
11992 KB |
Output is correct |
51 |
Correct |
6 ms |
12064 KB |
Output is correct |
52 |
Correct |
7 ms |
12116 KB |
Output is correct |
53 |
Correct |
7 ms |
11988 KB |
Output is correct |
54 |
Correct |
7 ms |
12044 KB |
Output is correct |
55 |
Correct |
7 ms |
11988 KB |
Output is correct |
56 |
Correct |
7 ms |
11956 KB |
Output is correct |
57 |
Correct |
7 ms |
11988 KB |
Output is correct |
58 |
Correct |
7 ms |
12116 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
7 ms |
11988 KB |
Output is correct |
2 |
Correct |
8 ms |
11988 KB |
Output is correct |
3 |
Correct |
6 ms |
12024 KB |
Output is correct |
4 |
Correct |
6 ms |
12044 KB |
Output is correct |
5 |
Correct |
7 ms |
11988 KB |
Output is correct |
6 |
Correct |
6 ms |
12064 KB |
Output is correct |
7 |
Correct |
6 ms |
12064 KB |
Output is correct |
8 |
Correct |
7 ms |
11976 KB |
Output is correct |
9 |
Correct |
8 ms |
12060 KB |
Output is correct |
10 |
Correct |
8 ms |
12116 KB |
Output is correct |
11 |
Correct |
7 ms |
11988 KB |
Output is correct |
12 |
Correct |
6 ms |
11988 KB |
Output is correct |
13 |
Correct |
6 ms |
11988 KB |
Output is correct |
14 |
Correct |
7 ms |
12064 KB |
Output is correct |
15 |
Correct |
7 ms |
11988 KB |
Output is correct |
16 |
Correct |
7 ms |
12068 KB |
Output is correct |
17 |
Correct |
7 ms |
11988 KB |
Output is correct |
18 |
Correct |
6 ms |
12040 KB |
Output is correct |
19 |
Correct |
9 ms |
12064 KB |
Output is correct |
20 |
Correct |
6 ms |
12060 KB |
Output is correct |
21 |
Correct |
8 ms |
12064 KB |
Output is correct |
22 |
Correct |
7 ms |
12116 KB |
Output is correct |
23 |
Correct |
7 ms |
12116 KB |
Output is correct |
24 |
Correct |
7 ms |
12116 KB |
Output is correct |
25 |
Correct |
7 ms |
12116 KB |
Output is correct |
26 |
Correct |
7 ms |
12116 KB |
Output is correct |
27 |
Correct |
8 ms |
12116 KB |
Output is correct |
28 |
Correct |
7 ms |
12072 KB |
Output is correct |
29 |
Correct |
7 ms |
12116 KB |
Output is correct |
30 |
Correct |
6 ms |
12064 KB |
Output is correct |
31 |
Correct |
7 ms |
12116 KB |
Output is correct |
32 |
Correct |
7 ms |
11988 KB |
Output is correct |
33 |
Correct |
7 ms |
11988 KB |
Output is correct |
34 |
Correct |
6 ms |
11952 KB |
Output is correct |
35 |
Correct |
6 ms |
12064 KB |
Output is correct |
36 |
Correct |
6 ms |
11988 KB |
Output is correct |
37 |
Correct |
7 ms |
11988 KB |
Output is correct |
38 |
Correct |
7 ms |
12116 KB |
Output is correct |
39 |
Correct |
7 ms |
11988 KB |
Output is correct |
40 |
Correct |
8 ms |
11988 KB |
Output is correct |
41 |
Correct |
8 ms |
11988 KB |
Output is correct |
42 |
Correct |
7 ms |
11988 KB |
Output is correct |
43 |
Correct |
7 ms |
12072 KB |
Output is correct |
44 |
Correct |
7 ms |
11988 KB |
Output is correct |
45 |
Correct |
7 ms |
11956 KB |
Output is correct |
46 |
Correct |
7 ms |
11988 KB |
Output is correct |
47 |
Correct |
6 ms |
11988 KB |
Output is correct |
48 |
Correct |
7 ms |
11988 KB |
Output is correct |
49 |
Correct |
7 ms |
12080 KB |
Output is correct |
50 |
Correct |
6 ms |
11992 KB |
Output is correct |
51 |
Correct |
6 ms |
12064 KB |
Output is correct |
52 |
Correct |
7 ms |
12116 KB |
Output is correct |
53 |
Correct |
7 ms |
11988 KB |
Output is correct |
54 |
Correct |
7 ms |
12044 KB |
Output is correct |
55 |
Correct |
7 ms |
11988 KB |
Output is correct |
56 |
Correct |
7 ms |
11956 KB |
Output is correct |
57 |
Correct |
7 ms |
11988 KB |
Output is correct |
58 |
Correct |
7 ms |
12116 KB |
Output is correct |
59 |
Correct |
291 ms |
36000 KB |
Output is correct |
60 |
Correct |
377 ms |
38748 KB |
Output is correct |
61 |
Correct |
6 ms |
11988 KB |
Output is correct |
62 |
Correct |
7 ms |
11988 KB |
Output is correct |
63 |
Correct |
279 ms |
33708 KB |
Output is correct |
64 |
Correct |
8 ms |
12456 KB |
Output is correct |
65 |
Correct |
15 ms |
13896 KB |
Output is correct |
66 |
Correct |
154 ms |
27892 KB |
Output is correct |
67 |
Correct |
413 ms |
46916 KB |
Output is correct |
68 |
Correct |
430 ms |
47724 KB |
Output is correct |
69 |
Correct |
11 ms |
12844 KB |
Output is correct |
70 |
Correct |
75 ms |
21312 KB |
Output is correct |
71 |
Correct |
267 ms |
41816 KB |
Output is correct |
72 |
Correct |
286 ms |
40620 KB |
Output is correct |
73 |
Correct |
70 ms |
19092 KB |
Output is correct |
74 |
Correct |
346 ms |
37696 KB |
Output is correct |
75 |
Correct |
25 ms |
15188 KB |
Output is correct |
76 |
Correct |
251 ms |
41576 KB |
Output is correct |
77 |
Correct |
245 ms |
41608 KB |
Output is correct |
78 |
Correct |
27 ms |
15316 KB |
Output is correct |
79 |
Correct |
405 ms |
45208 KB |
Output is correct |
80 |
Correct |
8 ms |
12272 KB |
Output is correct |
81 |
Correct |
95 ms |
21240 KB |
Output is correct |
82 |
Correct |
308 ms |
39572 KB |
Output is correct |
83 |
Correct |
387 ms |
37588 KB |
Output is correct |
84 |
Correct |
371 ms |
37676 KB |
Output is correct |
85 |
Correct |
343 ms |
37684 KB |
Output is correct |
86 |
Correct |
354 ms |
38792 KB |
Output is correct |
87 |
Correct |
373 ms |
38668 KB |
Output is correct |