| # |
Submission time |
Handle |
Problem |
Language |
Result |
Execution time |
Memory |
| 394757 |
2021-04-27T09:31:39 Z |
Hossein8320 |
Network (BOI15_net) |
C++17 |
|
492 ms |
47656 KB |
//That's what she said
#include <bits/stdc++.h>
#define int long long
#define pb push_back
#define F first
#define S second
using namespace std;
const int maxn = 5e5 + 9, modn = 1e9 + 7;
int n, m, v, u;
vector <int> barg, adj[maxn];
void dfs(int v, int par)
{
if(adj[v].size() == 1) barg.pb(v);
for(auto i : adj[v]) if(i != par) dfs(i, v);
}
int32_t main(){
ios_base::sync_with_stdio(false);
cin.tie(0), cout.tie(0);
cin >> n;
for(int i = 1; i < n; i++) cin >> v >> u, adj[v].pb(u), adj[u].pb(v);
dfs(1, 1);
cout << (barg.size() + 1) / 2 << '\n';
int s = barg.size() / 2;
for(int i = 0; i < s; i++) cout << barg[i] << " " << barg[i + s] << '\n';
if(s != (barg.size() + 1) / 2) cout << barg[2 * s] << " " << barg[0] << '\n';
return 0;
}
Compilation message
net.cpp: In function 'int32_t main()':
net.cpp:25:10: 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]
25 | if(s != (barg.size() + 1) / 2) cout << barg[2 * s] << " " << barg[0] << '\n';
| ~~^~~~~~~~~~~~~~~~~~~~~~~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
8 ms |
11980 KB |
Output is correct |
| 2 |
Correct |
9 ms |
11980 KB |
Output is correct |
| 3 |
Correct |
7 ms |
11980 KB |
Output is correct |
| 4 |
Correct |
8 ms |
11984 KB |
Output is correct |
| 5 |
Correct |
7 ms |
11980 KB |
Output is correct |
| 6 |
Correct |
9 ms |
11980 KB |
Output is correct |
| 7 |
Correct |
8 ms |
11980 KB |
Output is correct |
| 8 |
Correct |
8 ms |
11980 KB |
Output is correct |
| 9 |
Correct |
8 ms |
11980 KB |
Output is correct |
| 10 |
Correct |
8 ms |
12060 KB |
Output is correct |
| 11 |
Correct |
8 ms |
12060 KB |
Output is correct |
| 12 |
Correct |
7 ms |
12060 KB |
Output is correct |
| 13 |
Correct |
8 ms |
11980 KB |
Output is correct |
| 14 |
Correct |
8 ms |
11980 KB |
Output is correct |
| 15 |
Correct |
8 ms |
11980 KB |
Output is correct |
| 16 |
Correct |
8 ms |
11992 KB |
Output is correct |
| 17 |
Correct |
8 ms |
12040 KB |
Output is correct |
| 18 |
Correct |
9 ms |
11980 KB |
Output is correct |
| 19 |
Correct |
9 ms |
12064 KB |
Output is correct |
| 20 |
Correct |
8 ms |
11980 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
8 ms |
11980 KB |
Output is correct |
| 2 |
Correct |
9 ms |
11980 KB |
Output is correct |
| 3 |
Correct |
7 ms |
11980 KB |
Output is correct |
| 4 |
Correct |
8 ms |
11984 KB |
Output is correct |
| 5 |
Correct |
7 ms |
11980 KB |
Output is correct |
| 6 |
Correct |
9 ms |
11980 KB |
Output is correct |
| 7 |
Correct |
8 ms |
11980 KB |
Output is correct |
| 8 |
Correct |
8 ms |
11980 KB |
Output is correct |
| 9 |
Correct |
8 ms |
11980 KB |
Output is correct |
| 10 |
Correct |
8 ms |
12060 KB |
Output is correct |
| 11 |
Correct |
8 ms |
12060 KB |
Output is correct |
| 12 |
Correct |
7 ms |
12060 KB |
Output is correct |
| 13 |
Correct |
8 ms |
11980 KB |
Output is correct |
| 14 |
Correct |
8 ms |
11980 KB |
Output is correct |
| 15 |
Correct |
8 ms |
11980 KB |
Output is correct |
| 16 |
Correct |
8 ms |
11992 KB |
Output is correct |
| 17 |
Correct |
8 ms |
12040 KB |
Output is correct |
| 18 |
Correct |
9 ms |
11980 KB |
Output is correct |
| 19 |
Correct |
9 ms |
12064 KB |
Output is correct |
| 20 |
Correct |
8 ms |
11980 KB |
Output is correct |
| 21 |
Correct |
7 ms |
11980 KB |
Output is correct |
| 22 |
Correct |
8 ms |
12108 KB |
Output is correct |
| 23 |
Correct |
8 ms |
12200 KB |
Output is correct |
| 24 |
Correct |
8 ms |
12108 KB |
Output is correct |
| 25 |
Correct |
10 ms |
12180 KB |
Output is correct |
| 26 |
Correct |
8 ms |
12132 KB |
Output is correct |
| 27 |
Correct |
9 ms |
12108 KB |
Output is correct |
| 28 |
Correct |
9 ms |
12108 KB |
Output is correct |
| 29 |
Correct |
8 ms |
12076 KB |
Output is correct |
| 30 |
Correct |
9 ms |
11984 KB |
Output is correct |
| 31 |
Correct |
9 ms |
12068 KB |
Output is correct |
| 32 |
Correct |
8 ms |
11980 KB |
Output is correct |
| 33 |
Correct |
8 ms |
11960 KB |
Output is correct |
| 34 |
Correct |
8 ms |
12064 KB |
Output is correct |
| 35 |
Correct |
8 ms |
12040 KB |
Output is correct |
| 36 |
Correct |
7 ms |
11980 KB |
Output is correct |
| 37 |
Correct |
8 ms |
11980 KB |
Output is correct |
| 38 |
Correct |
8 ms |
12060 KB |
Output is correct |
| 39 |
Correct |
8 ms |
11980 KB |
Output is correct |
| 40 |
Correct |
8 ms |
11980 KB |
Output is correct |
| 41 |
Correct |
8 ms |
11980 KB |
Output is correct |
| 42 |
Correct |
8 ms |
11980 KB |
Output is correct |
| 43 |
Correct |
8 ms |
12108 KB |
Output is correct |
| 44 |
Correct |
8 ms |
12064 KB |
Output is correct |
| 45 |
Correct |
8 ms |
12064 KB |
Output is correct |
| 46 |
Correct |
8 ms |
12108 KB |
Output is correct |
| 47 |
Correct |
8 ms |
11980 KB |
Output is correct |
| 48 |
Correct |
8 ms |
12060 KB |
Output is correct |
| 49 |
Correct |
8 ms |
12064 KB |
Output is correct |
| 50 |
Correct |
8 ms |
11980 KB |
Output is correct |
| 51 |
Correct |
8 ms |
11980 KB |
Output is correct |
| 52 |
Correct |
8 ms |
11980 KB |
Output is correct |
| 53 |
Correct |
8 ms |
12108 KB |
Output is correct |
| 54 |
Correct |
8 ms |
11980 KB |
Output is correct |
| 55 |
Correct |
8 ms |
12056 KB |
Output is correct |
| 56 |
Correct |
8 ms |
11976 KB |
Output is correct |
| 57 |
Correct |
9 ms |
12068 KB |
Output is correct |
| 58 |
Correct |
9 ms |
12108 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
8 ms |
11980 KB |
Output is correct |
| 2 |
Correct |
9 ms |
11980 KB |
Output is correct |
| 3 |
Correct |
7 ms |
11980 KB |
Output is correct |
| 4 |
Correct |
8 ms |
11984 KB |
Output is correct |
| 5 |
Correct |
7 ms |
11980 KB |
Output is correct |
| 6 |
Correct |
9 ms |
11980 KB |
Output is correct |
| 7 |
Correct |
8 ms |
11980 KB |
Output is correct |
| 8 |
Correct |
8 ms |
11980 KB |
Output is correct |
| 9 |
Correct |
8 ms |
11980 KB |
Output is correct |
| 10 |
Correct |
8 ms |
12060 KB |
Output is correct |
| 11 |
Correct |
8 ms |
12060 KB |
Output is correct |
| 12 |
Correct |
7 ms |
12060 KB |
Output is correct |
| 13 |
Correct |
8 ms |
11980 KB |
Output is correct |
| 14 |
Correct |
8 ms |
11980 KB |
Output is correct |
| 15 |
Correct |
8 ms |
11980 KB |
Output is correct |
| 16 |
Correct |
8 ms |
11992 KB |
Output is correct |
| 17 |
Correct |
8 ms |
12040 KB |
Output is correct |
| 18 |
Correct |
9 ms |
11980 KB |
Output is correct |
| 19 |
Correct |
9 ms |
12064 KB |
Output is correct |
| 20 |
Correct |
8 ms |
11980 KB |
Output is correct |
| 21 |
Correct |
7 ms |
11980 KB |
Output is correct |
| 22 |
Correct |
8 ms |
12108 KB |
Output is correct |
| 23 |
Correct |
8 ms |
12200 KB |
Output is correct |
| 24 |
Correct |
8 ms |
12108 KB |
Output is correct |
| 25 |
Correct |
10 ms |
12180 KB |
Output is correct |
| 26 |
Correct |
8 ms |
12132 KB |
Output is correct |
| 27 |
Correct |
9 ms |
12108 KB |
Output is correct |
| 28 |
Correct |
9 ms |
12108 KB |
Output is correct |
| 29 |
Correct |
8 ms |
12076 KB |
Output is correct |
| 30 |
Correct |
9 ms |
11984 KB |
Output is correct |
| 31 |
Correct |
9 ms |
12068 KB |
Output is correct |
| 32 |
Correct |
8 ms |
11980 KB |
Output is correct |
| 33 |
Correct |
8 ms |
11960 KB |
Output is correct |
| 34 |
Correct |
8 ms |
12064 KB |
Output is correct |
| 35 |
Correct |
8 ms |
12040 KB |
Output is correct |
| 36 |
Correct |
7 ms |
11980 KB |
Output is correct |
| 37 |
Correct |
8 ms |
11980 KB |
Output is correct |
| 38 |
Correct |
8 ms |
12060 KB |
Output is correct |
| 39 |
Correct |
8 ms |
11980 KB |
Output is correct |
| 40 |
Correct |
8 ms |
11980 KB |
Output is correct |
| 41 |
Correct |
8 ms |
11980 KB |
Output is correct |
| 42 |
Correct |
8 ms |
11980 KB |
Output is correct |
| 43 |
Correct |
8 ms |
12108 KB |
Output is correct |
| 44 |
Correct |
8 ms |
12064 KB |
Output is correct |
| 45 |
Correct |
8 ms |
12064 KB |
Output is correct |
| 46 |
Correct |
8 ms |
12108 KB |
Output is correct |
| 47 |
Correct |
8 ms |
11980 KB |
Output is correct |
| 48 |
Correct |
8 ms |
12060 KB |
Output is correct |
| 49 |
Correct |
8 ms |
12064 KB |
Output is correct |
| 50 |
Correct |
8 ms |
11980 KB |
Output is correct |
| 51 |
Correct |
8 ms |
11980 KB |
Output is correct |
| 52 |
Correct |
8 ms |
11980 KB |
Output is correct |
| 53 |
Correct |
8 ms |
12108 KB |
Output is correct |
| 54 |
Correct |
8 ms |
11980 KB |
Output is correct |
| 55 |
Correct |
8 ms |
12056 KB |
Output is correct |
| 56 |
Correct |
8 ms |
11976 KB |
Output is correct |
| 57 |
Correct |
9 ms |
12068 KB |
Output is correct |
| 58 |
Correct |
9 ms |
12108 KB |
Output is correct |
| 59 |
Correct |
352 ms |
36108 KB |
Output is correct |
| 60 |
Correct |
446 ms |
38184 KB |
Output is correct |
| 61 |
Correct |
8 ms |
11980 KB |
Output is correct |
| 62 |
Correct |
8 ms |
11992 KB |
Output is correct |
| 63 |
Correct |
342 ms |
32812 KB |
Output is correct |
| 64 |
Correct |
10 ms |
12492 KB |
Output is correct |
| 65 |
Correct |
19 ms |
14144 KB |
Output is correct |
| 66 |
Correct |
150 ms |
29716 KB |
Output is correct |
| 67 |
Correct |
488 ms |
45892 KB |
Output is correct |
| 68 |
Correct |
491 ms |
47656 KB |
Output is correct |
| 69 |
Correct |
14 ms |
13092 KB |
Output is correct |
| 70 |
Correct |
88 ms |
22412 KB |
Output is correct |
| 71 |
Correct |
322 ms |
40484 KB |
Output is correct |
| 72 |
Correct |
374 ms |
39472 KB |
Output is correct |
| 73 |
Correct |
116 ms |
19260 KB |
Output is correct |
| 74 |
Correct |
448 ms |
36036 KB |
Output is correct |
| 75 |
Correct |
32 ms |
15640 KB |
Output is correct |
| 76 |
Correct |
335 ms |
40108 KB |
Output is correct |
| 77 |
Correct |
319 ms |
40468 KB |
Output is correct |
| 78 |
Correct |
33 ms |
15920 KB |
Output is correct |
| 79 |
Correct |
492 ms |
43508 KB |
Output is correct |
| 80 |
Correct |
10 ms |
12236 KB |
Output is correct |
| 81 |
Correct |
104 ms |
21612 KB |
Output is correct |
| 82 |
Correct |
392 ms |
38284 KB |
Output is correct |
| 83 |
Correct |
428 ms |
36092 KB |
Output is correct |
| 84 |
Correct |
433 ms |
36156 KB |
Output is correct |
| 85 |
Correct |
429 ms |
36124 KB |
Output is correct |
| 86 |
Correct |
422 ms |
38440 KB |
Output is correct |
| 87 |
Correct |
441 ms |
38320 KB |
Output is correct |
