| # |
Submission time |
Handle |
Problem |
Language |
Result |
Execution time |
Memory |
| 633953 |
2022-08-23T13:51:24 Z |
MinaRagy06 |
Network (BOI15_net) |
C++17 |
|
521 ms |
56800 KB |
#include <bits/stdc++.h>
using namespace std;
#define lesgooo ios_base::sync_with_stdio(0), cin.tie(0), cout.tie(0)
#define endl '\n'
#define int long long
const int N = 5e5+5;
vector<int> adj[N], leaf;
void dfs(int i, int par)
{
if (adj[i].size() == 1) return leaf.push_back(i), void();
for (auto nxt : adj[i]) if (nxt != par) dfs(nxt, i);
}
int mx = 0, val = 0;
void dfs2(int i, int par, int sum)
{
if (sum > mx) mx = sum ,val = i;
for (auto nxt : adj[i]) if (nxt != par) dfs2(nxt, i, sum+1);
}
signed main()
{
lesgooo;
int n, u, v;
cin >> n;
for (int i =1 ; i < n; i++) cin >> u >> v, adj[--u].push_back(--v), adj[v].push_back(u);
int mxx = 0, vall = 0;
for (int i = 0; i < n; i++) if (adj[i].size() > mxx) mxx = adj[i].size(), vall = i;
dfs(vall, -1);
cout << (leaf.size()+1)/2 << endl;
for (int i = 0; i < leaf.size()/2; i++) cout << leaf[i]+1 << " " << leaf[leaf.size()/2+i]+1 << endl;
if (leaf.size()&1) dfs2(leaf.back(), -1, 0), cout << leaf.back()+1 << " " << val+1 << endl;
return 0;
}
Compilation message
net.cpp: In function 'int main()':
net.cpp:27:51: warning: comparison of integer expressions of different signedness: 'std::vector<long long int>::size_type' {aka 'long unsigned int'} and 'long long int' [-Wsign-compare]
27 | for (int i = 0; i < n; i++) if (adj[i].size() > mxx) mxx = adj[i].size(), vall = i;
| ~~~~~~~~~~~~~~^~~~~
net.cpp:30:23: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
30 | for (int i = 0; i < leaf.size()/2; i++) cout << leaf[i]+1 << " " << leaf[leaf.size()/2+i]+1 << endl;
| ~~^~~~~~~~~~~~~~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
6 ms |
11988 KB |
Output is correct |
| 2 |
Correct |
6 ms |
11988 KB |
Output is correct |
| 3 |
Correct |
6 ms |
11988 KB |
Output is correct |
| 4 |
Correct |
6 ms |
11988 KB |
Output is correct |
| 5 |
Correct |
7 ms |
11988 KB |
Output is correct |
| 6 |
Correct |
6 ms |
11988 KB |
Output is correct |
| 7 |
Correct |
6 ms |
12048 KB |
Output is correct |
| 8 |
Correct |
8 ms |
11988 KB |
Output is correct |
| 9 |
Correct |
7 ms |
11988 KB |
Output is correct |
| 10 |
Correct |
7 ms |
11988 KB |
Output is correct |
| 11 |
Correct |
6 ms |
11988 KB |
Output is correct |
| 12 |
Correct |
7 ms |
12060 KB |
Output is correct |
| 13 |
Correct |
6 ms |
11988 KB |
Output is correct |
| 14 |
Correct |
6 ms |
11988 KB |
Output is correct |
| 15 |
Correct |
6 ms |
12064 KB |
Output is correct |
| 16 |
Correct |
6 ms |
12072 KB |
Output is correct |
| 17 |
Correct |
7 ms |
11988 KB |
Output is correct |
| 18 |
Correct |
8 ms |
11988 KB |
Output is correct |
| 19 |
Correct |
6 ms |
11988 KB |
Output is correct |
| 20 |
Correct |
7 ms |
12036 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
6 ms |
11988 KB |
Output is correct |
| 2 |
Correct |
6 ms |
11988 KB |
Output is correct |
| 3 |
Correct |
6 ms |
11988 KB |
Output is correct |
| 4 |
Correct |
6 ms |
11988 KB |
Output is correct |
| 5 |
Correct |
7 ms |
11988 KB |
Output is correct |
| 6 |
Correct |
6 ms |
11988 KB |
Output is correct |
| 7 |
Correct |
6 ms |
12048 KB |
Output is correct |
| 8 |
Correct |
8 ms |
11988 KB |
Output is correct |
| 9 |
Correct |
7 ms |
11988 KB |
Output is correct |
| 10 |
Correct |
7 ms |
11988 KB |
Output is correct |
| 11 |
Correct |
6 ms |
11988 KB |
Output is correct |
| 12 |
Correct |
7 ms |
12060 KB |
Output is correct |
| 13 |
Correct |
6 ms |
11988 KB |
Output is correct |
| 14 |
Correct |
6 ms |
11988 KB |
Output is correct |
| 15 |
Correct |
6 ms |
12064 KB |
Output is correct |
| 16 |
Correct |
6 ms |
12072 KB |
Output is correct |
| 17 |
Correct |
7 ms |
11988 KB |
Output is correct |
| 18 |
Correct |
8 ms |
11988 KB |
Output is correct |
| 19 |
Correct |
6 ms |
11988 KB |
Output is correct |
| 20 |
Correct |
7 ms |
12036 KB |
Output is correct |
| 21 |
Correct |
7 ms |
12064 KB |
Output is correct |
| 22 |
Correct |
7 ms |
12116 KB |
Output is correct |
| 23 |
Correct |
8 ms |
12188 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 |
12072 KB |
Output is correct |
| 27 |
Correct |
8 ms |
12204 KB |
Output is correct |
| 28 |
Correct |
9 ms |
12172 KB |
Output is correct |
| 29 |
Correct |
7 ms |
12076 KB |
Output is correct |
| 30 |
Correct |
6 ms |
11988 KB |
Output is correct |
| 31 |
Correct |
8 ms |
12116 KB |
Output is correct |
| 32 |
Correct |
9 ms |
12064 KB |
Output is correct |
| 33 |
Correct |
6 ms |
12068 KB |
Output is correct |
| 34 |
Correct |
7 ms |
11988 KB |
Output is correct |
| 35 |
Correct |
7 ms |
12068 KB |
Output is correct |
| 36 |
Correct |
8 ms |
11956 KB |
Output is correct |
| 37 |
Correct |
6 ms |
11988 KB |
Output is correct |
| 38 |
Correct |
8 ms |
12064 KB |
Output is correct |
| 39 |
Correct |
6 ms |
12068 KB |
Output is correct |
| 40 |
Correct |
7 ms |
12064 KB |
Output is correct |
| 41 |
Correct |
6 ms |
11988 KB |
Output is correct |
| 42 |
Correct |
6 ms |
12064 KB |
Output is correct |
| 43 |
Correct |
8 ms |
12116 KB |
Output is correct |
| 44 |
Correct |
7 ms |
11988 KB |
Output is correct |
| 45 |
Correct |
8 ms |
11988 KB |
Output is correct |
| 46 |
Correct |
7 ms |
12064 KB |
Output is correct |
| 47 |
Correct |
6 ms |
12060 KB |
Output is correct |
| 48 |
Correct |
8 ms |
11988 KB |
Output is correct |
| 49 |
Correct |
6 ms |
12116 KB |
Output is correct |
| 50 |
Correct |
6 ms |
11988 KB |
Output is correct |
| 51 |
Correct |
6 ms |
11988 KB |
Output is correct |
| 52 |
Correct |
6 ms |
12060 KB |
Output is correct |
| 53 |
Correct |
6 ms |
12064 KB |
Output is correct |
| 54 |
Correct |
6 ms |
12060 KB |
Output is correct |
| 55 |
Correct |
6 ms |
12064 KB |
Output is correct |
| 56 |
Correct |
7 ms |
11988 KB |
Output is correct |
| 57 |
Correct |
9 ms |
11988 KB |
Output is correct |
| 58 |
Correct |
8 ms |
12116 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
6 ms |
11988 KB |
Output is correct |
| 2 |
Correct |
6 ms |
11988 KB |
Output is correct |
| 3 |
Correct |
6 ms |
11988 KB |
Output is correct |
| 4 |
Correct |
6 ms |
11988 KB |
Output is correct |
| 5 |
Correct |
7 ms |
11988 KB |
Output is correct |
| 6 |
Correct |
6 ms |
11988 KB |
Output is correct |
| 7 |
Correct |
6 ms |
12048 KB |
Output is correct |
| 8 |
Correct |
8 ms |
11988 KB |
Output is correct |
| 9 |
Correct |
7 ms |
11988 KB |
Output is correct |
| 10 |
Correct |
7 ms |
11988 KB |
Output is correct |
| 11 |
Correct |
6 ms |
11988 KB |
Output is correct |
| 12 |
Correct |
7 ms |
12060 KB |
Output is correct |
| 13 |
Correct |
6 ms |
11988 KB |
Output is correct |
| 14 |
Correct |
6 ms |
11988 KB |
Output is correct |
| 15 |
Correct |
6 ms |
12064 KB |
Output is correct |
| 16 |
Correct |
6 ms |
12072 KB |
Output is correct |
| 17 |
Correct |
7 ms |
11988 KB |
Output is correct |
| 18 |
Correct |
8 ms |
11988 KB |
Output is correct |
| 19 |
Correct |
6 ms |
11988 KB |
Output is correct |
| 20 |
Correct |
7 ms |
12036 KB |
Output is correct |
| 21 |
Correct |
7 ms |
12064 KB |
Output is correct |
| 22 |
Correct |
7 ms |
12116 KB |
Output is correct |
| 23 |
Correct |
8 ms |
12188 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 |
12072 KB |
Output is correct |
| 27 |
Correct |
8 ms |
12204 KB |
Output is correct |
| 28 |
Correct |
9 ms |
12172 KB |
Output is correct |
| 29 |
Correct |
7 ms |
12076 KB |
Output is correct |
| 30 |
Correct |
6 ms |
11988 KB |
Output is correct |
| 31 |
Correct |
8 ms |
12116 KB |
Output is correct |
| 32 |
Correct |
9 ms |
12064 KB |
Output is correct |
| 33 |
Correct |
6 ms |
12068 KB |
Output is correct |
| 34 |
Correct |
7 ms |
11988 KB |
Output is correct |
| 35 |
Correct |
7 ms |
12068 KB |
Output is correct |
| 36 |
Correct |
8 ms |
11956 KB |
Output is correct |
| 37 |
Correct |
6 ms |
11988 KB |
Output is correct |
| 38 |
Correct |
8 ms |
12064 KB |
Output is correct |
| 39 |
Correct |
6 ms |
12068 KB |
Output is correct |
| 40 |
Correct |
7 ms |
12064 KB |
Output is correct |
| 41 |
Correct |
6 ms |
11988 KB |
Output is correct |
| 42 |
Correct |
6 ms |
12064 KB |
Output is correct |
| 43 |
Correct |
8 ms |
12116 KB |
Output is correct |
| 44 |
Correct |
7 ms |
11988 KB |
Output is correct |
| 45 |
Correct |
8 ms |
11988 KB |
Output is correct |
| 46 |
Correct |
7 ms |
12064 KB |
Output is correct |
| 47 |
Correct |
6 ms |
12060 KB |
Output is correct |
| 48 |
Correct |
8 ms |
11988 KB |
Output is correct |
| 49 |
Correct |
6 ms |
12116 KB |
Output is correct |
| 50 |
Correct |
6 ms |
11988 KB |
Output is correct |
| 51 |
Correct |
6 ms |
11988 KB |
Output is correct |
| 52 |
Correct |
6 ms |
12060 KB |
Output is correct |
| 53 |
Correct |
6 ms |
12064 KB |
Output is correct |
| 54 |
Correct |
6 ms |
12060 KB |
Output is correct |
| 55 |
Correct |
6 ms |
12064 KB |
Output is correct |
| 56 |
Correct |
7 ms |
11988 KB |
Output is correct |
| 57 |
Correct |
9 ms |
11988 KB |
Output is correct |
| 58 |
Correct |
8 ms |
12116 KB |
Output is correct |
| 59 |
Correct |
283 ms |
40492 KB |
Output is correct |
| 60 |
Correct |
422 ms |
43312 KB |
Output is correct |
| 61 |
Correct |
7 ms |
11988 KB |
Output is correct |
| 62 |
Correct |
9 ms |
12036 KB |
Output is correct |
| 63 |
Correct |
297 ms |
36708 KB |
Output is correct |
| 64 |
Correct |
11 ms |
12336 KB |
Output is correct |
| 65 |
Correct |
18 ms |
13612 KB |
Output is correct |
| 66 |
Correct |
129 ms |
24820 KB |
Output is correct |
| 67 |
Correct |
441 ms |
46840 KB |
Output is correct |
| 68 |
Correct |
423 ms |
56800 KB |
Output is correct |
| 69 |
Correct |
13 ms |
13108 KB |
Output is correct |
| 70 |
Correct |
71 ms |
23328 KB |
Output is correct |
| 71 |
Correct |
261 ms |
45748 KB |
Output is correct |
| 72 |
Correct |
318 ms |
44444 KB |
Output is correct |
| 73 |
Correct |
78 ms |
20056 KB |
Output is correct |
| 74 |
Correct |
361 ms |
41132 KB |
Output is correct |
| 75 |
Correct |
35 ms |
15644 KB |
Output is correct |
| 76 |
Correct |
250 ms |
45352 KB |
Output is correct |
| 77 |
Correct |
264 ms |
45524 KB |
Output is correct |
| 78 |
Correct |
33 ms |
15916 KB |
Output is correct |
| 79 |
Correct |
521 ms |
44760 KB |
Output is correct |
| 80 |
Correct |
8 ms |
12244 KB |
Output is correct |
| 81 |
Correct |
112 ms |
22568 KB |
Output is correct |
| 82 |
Correct |
337 ms |
43156 KB |
Output is correct |
| 83 |
Correct |
421 ms |
41112 KB |
Output is correct |
| 84 |
Correct |
359 ms |
41180 KB |
Output is correct |
| 85 |
Correct |
364 ms |
41076 KB |
Output is correct |
| 86 |
Correct |
443 ms |
43336 KB |
Output is correct |
| 87 |
Correct |
384 ms |
43360 KB |
Output is correct |
