| # |
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 |
