# | Submission time | Handle | Problem | Language | Result | Execution time | Memory |
---|---|---|---|---|---|---|---|
79560 | 2018-10-15T03:06:36 Z | FutymyClone | Network (BOI15_net) | C++14 | 663 ms | 41528 KB |
#include <bits/stdc++.h> using namespace std; const int N = 5e5 + 5; int n; vector <int> vec, g[N]; void dfs (int u, int p) { bool leaf = true; for (auto v: g[u]) { if (v == p) continue; leaf = false; dfs(v, u); } if (leaf) vec.push_back(u); } int main(){ scanf("%d", &n); for (int i = 1; i <= n - 1; i++) { int u, v; scanf("%d %d", &u, &v); g[u].push_back(v); g[v].push_back(u); } for (int i = 1; i <= n; i++) { if (g[i].size() > 1) { dfs(i, i); break; } } printf("%d\n", ((int)vec.size() + 1) / 2); for (int i = 0; i < ((int)vec.size() + 1) / 2; i++) printf("%d %d\n", vec[i], vec[i + vec.size() / 2]); return 0; }
Compilation message
# | Verdict | Execution time | Memory | Grader output |
---|---|---|---|---|
1 | Correct | 13 ms | 12024 KB | Output is correct |
2 | Correct | 12 ms | 12028 KB | Output is correct |
3 | Correct | 12 ms | 12200 KB | Output is correct |
4 | Correct | 16 ms | 12200 KB | Output is correct |
5 | Correct | 16 ms | 12232 KB | Output is correct |
6 | Correct | 12 ms | 12268 KB | Output is correct |
7 | Correct | 12 ms | 12268 KB | Output is correct |
8 | Correct | 12 ms | 12268 KB | Output is correct |
9 | Correct | 12 ms | 12268 KB | Output is correct |
10 | Correct | 12 ms | 12268 KB | Output is correct |
11 | Correct | 13 ms | 12268 KB | Output is correct |
12 | Correct | 12 ms | 12280 KB | Output is correct |
13 | Correct | 12 ms | 12280 KB | Output is correct |
14 | Correct | 12 ms | 12372 KB | Output is correct |
15 | Correct | 12 ms | 12372 KB | Output is correct |
16 | Correct | 15 ms | 12372 KB | Output is correct |
17 | Correct | 12 ms | 12372 KB | Output is correct |
18 | Correct | 12 ms | 12372 KB | Output is correct |
19 | Correct | 12 ms | 12372 KB | Output is correct |
20 | Correct | 12 ms | 12372 KB | Output is correct |
# | Verdict | Execution time | Memory | Grader output |
---|---|---|---|---|
1 | Correct | 13 ms | 12024 KB | Output is correct |
2 | Correct | 12 ms | 12028 KB | Output is correct |
3 | Correct | 12 ms | 12200 KB | Output is correct |
4 | Correct | 16 ms | 12200 KB | Output is correct |
5 | Correct | 16 ms | 12232 KB | Output is correct |
6 | Correct | 12 ms | 12268 KB | Output is correct |
7 | Correct | 12 ms | 12268 KB | Output is correct |
8 | Correct | 12 ms | 12268 KB | Output is correct |
9 | Correct | 12 ms | 12268 KB | Output is correct |
10 | Correct | 12 ms | 12268 KB | Output is correct |
11 | Correct | 13 ms | 12268 KB | Output is correct |
12 | Correct | 12 ms | 12280 KB | Output is correct |
13 | Correct | 12 ms | 12280 KB | Output is correct |
14 | Correct | 12 ms | 12372 KB | Output is correct |
15 | Correct | 12 ms | 12372 KB | Output is correct |
16 | Correct | 15 ms | 12372 KB | Output is correct |
17 | Correct | 12 ms | 12372 KB | Output is correct |
18 | Correct | 12 ms | 12372 KB | Output is correct |
19 | Correct | 12 ms | 12372 KB | Output is correct |
20 | Correct | 12 ms | 12372 KB | Output is correct |
21 | Correct | 12 ms | 12372 KB | Output is correct |
22 | Correct | 13 ms | 12412 KB | Output is correct |
23 | Correct | 13 ms | 12412 KB | Output is correct |
24 | Correct | 13 ms | 12428 KB | Output is correct |
25 | Correct | 15 ms | 12460 KB | Output is correct |
26 | Correct | 13 ms | 12460 KB | Output is correct |
27 | Correct | 12 ms | 12460 KB | Output is correct |
28 | Correct | 16 ms | 12460 KB | Output is correct |
29 | Correct | 13 ms | 12604 KB | Output is correct |
30 | Correct | 12 ms | 12604 KB | Output is correct |
31 | Correct | 13 ms | 12604 KB | Output is correct |
32 | Correct | 14 ms | 12604 KB | Output is correct |
33 | Correct | 12 ms | 12604 KB | Output is correct |
34 | Correct | 12 ms | 12604 KB | Output is correct |
35 | Correct | 12 ms | 12604 KB | Output is correct |
36 | Correct | 12 ms | 12604 KB | Output is correct |
37 | Correct | 12 ms | 12604 KB | Output is correct |
38 | Correct | 13 ms | 12604 KB | Output is correct |
39 | Correct | 23 ms | 12604 KB | Output is correct |
40 | Correct | 13 ms | 12604 KB | Output is correct |
41 | Correct | 11 ms | 12604 KB | Output is correct |
42 | Correct | 12 ms | 12604 KB | Output is correct |
43 | Correct | 12 ms | 12604 KB | Output is correct |
44 | Correct | 13 ms | 12604 KB | Output is correct |
45 | Correct | 12 ms | 12604 KB | Output is correct |
46 | Correct | 14 ms | 12604 KB | Output is correct |
47 | Correct | 13 ms | 12604 KB | Output is correct |
48 | Correct | 12 ms | 12604 KB | Output is correct |
49 | Correct | 12 ms | 12604 KB | Output is correct |
50 | Correct | 14 ms | 12604 KB | Output is correct |
51 | Correct | 12 ms | 12604 KB | Output is correct |
52 | Correct | 12 ms | 12604 KB | Output is correct |
53 | Correct | 12 ms | 12604 KB | Output is correct |
54 | Correct | 12 ms | 12604 KB | Output is correct |
55 | Correct | 12 ms | 12604 KB | Output is correct |
56 | Correct | 11 ms | 12604 KB | Output is correct |
57 | Correct | 12 ms | 12604 KB | Output is correct |
58 | Correct | 13 ms | 12604 KB | Output is correct |
# | Verdict | Execution time | Memory | Grader output |
---|---|---|---|---|
1 | Correct | 13 ms | 12024 KB | Output is correct |
2 | Correct | 12 ms | 12028 KB | Output is correct |
3 | Correct | 12 ms | 12200 KB | Output is correct |
4 | Correct | 16 ms | 12200 KB | Output is correct |
5 | Correct | 16 ms | 12232 KB | Output is correct |
6 | Correct | 12 ms | 12268 KB | Output is correct |
7 | Correct | 12 ms | 12268 KB | Output is correct |
8 | Correct | 12 ms | 12268 KB | Output is correct |
9 | Correct | 12 ms | 12268 KB | Output is correct |
10 | Correct | 12 ms | 12268 KB | Output is correct |
11 | Correct | 13 ms | 12268 KB | Output is correct |
12 | Correct | 12 ms | 12280 KB | Output is correct |
13 | Correct | 12 ms | 12280 KB | Output is correct |
14 | Correct | 12 ms | 12372 KB | Output is correct |
15 | Correct | 12 ms | 12372 KB | Output is correct |
16 | Correct | 15 ms | 12372 KB | Output is correct |
17 | Correct | 12 ms | 12372 KB | Output is correct |
18 | Correct | 12 ms | 12372 KB | Output is correct |
19 | Correct | 12 ms | 12372 KB | Output is correct |
20 | Correct | 12 ms | 12372 KB | Output is correct |
21 | Correct | 12 ms | 12372 KB | Output is correct |
22 | Correct | 13 ms | 12412 KB | Output is correct |
23 | Correct | 13 ms | 12412 KB | Output is correct |
24 | Correct | 13 ms | 12428 KB | Output is correct |
25 | Correct | 15 ms | 12460 KB | Output is correct |
26 | Correct | 13 ms | 12460 KB | Output is correct |
27 | Correct | 12 ms | 12460 KB | Output is correct |
28 | Correct | 16 ms | 12460 KB | Output is correct |
29 | Correct | 13 ms | 12604 KB | Output is correct |
30 | Correct | 12 ms | 12604 KB | Output is correct |
31 | Correct | 13 ms | 12604 KB | Output is correct |
32 | Correct | 14 ms | 12604 KB | Output is correct |
33 | Correct | 12 ms | 12604 KB | Output is correct |
34 | Correct | 12 ms | 12604 KB | Output is correct |
35 | Correct | 12 ms | 12604 KB | Output is correct |
36 | Correct | 12 ms | 12604 KB | Output is correct |
37 | Correct | 12 ms | 12604 KB | Output is correct |
38 | Correct | 13 ms | 12604 KB | Output is correct |
39 | Correct | 23 ms | 12604 KB | Output is correct |
40 | Correct | 13 ms | 12604 KB | Output is correct |
41 | Correct | 11 ms | 12604 KB | Output is correct |
42 | Correct | 12 ms | 12604 KB | Output is correct |
43 | Correct | 12 ms | 12604 KB | Output is correct |
44 | Correct | 13 ms | 12604 KB | Output is correct |
45 | Correct | 12 ms | 12604 KB | Output is correct |
46 | Correct | 14 ms | 12604 KB | Output is correct |
47 | Correct | 13 ms | 12604 KB | Output is correct |
48 | Correct | 12 ms | 12604 KB | Output is correct |
49 | Correct | 12 ms | 12604 KB | Output is correct |
50 | Correct | 14 ms | 12604 KB | Output is correct |
51 | Correct | 12 ms | 12604 KB | Output is correct |
52 | Correct | 12 ms | 12604 KB | Output is correct |
53 | Correct | 12 ms | 12604 KB | Output is correct |
54 | Correct | 12 ms | 12604 KB | Output is correct |
55 | Correct | 12 ms | 12604 KB | Output is correct |
56 | Correct | 11 ms | 12604 KB | Output is correct |
57 | Correct | 12 ms | 12604 KB | Output is correct |
58 | Correct | 13 ms | 12604 KB | Output is correct |
59 | Correct | 465 ms | 30352 KB | Output is correct |
60 | Correct | 520 ms | 32412 KB | Output is correct |
61 | Correct | 13 ms | 32412 KB | Output is correct |
62 | Correct | 12 ms | 32412 KB | Output is correct |
63 | Correct | 404 ms | 32412 KB | Output is correct |
64 | Correct | 16 ms | 32412 KB | Output is correct |
65 | Correct | 27 ms | 32412 KB | Output is correct |
66 | Correct | 194 ms | 32412 KB | Output is correct |
67 | Correct | 595 ms | 40712 KB | Output is correct |
68 | Correct | 663 ms | 41528 KB | Output is correct |
69 | Correct | 20 ms | 41528 KB | Output is correct |
70 | Correct | 123 ms | 41528 KB | Output is correct |
71 | Correct | 389 ms | 41528 KB | Output is correct |
72 | Correct | 392 ms | 41528 KB | Output is correct |
73 | Correct | 123 ms | 41528 KB | Output is correct |
74 | Correct | 596 ms | 41528 KB | Output is correct |
75 | Correct | 42 ms | 41528 KB | Output is correct |
76 | Correct | 401 ms | 41528 KB | Output is correct |
77 | Correct | 382 ms | 41528 KB | Output is correct |
78 | Correct | 60 ms | 41528 KB | Output is correct |
79 | Correct | 621 ms | 41528 KB | Output is correct |
80 | Correct | 15 ms | 41528 KB | Output is correct |
81 | Correct | 161 ms | 41528 KB | Output is correct |
82 | Correct | 472 ms | 41528 KB | Output is correct |
83 | Correct | 552 ms | 41528 KB | Output is correct |
84 | Correct | 551 ms | 41528 KB | Output is correct |
85 | Correct | 515 ms | 41528 KB | Output is correct |
86 | Correct | 572 ms | 41528 KB | Output is correct |
87 | Correct | 564 ms | 41528 KB | Output is correct |