# | Submission time | Handle | Problem | Language | Result | Execution time | Memory |
---|---|---|---|---|---|---|---|
305452 | 2020-09-23T08:27:39 Z | shahriarkhan | Network (BOI15_net) | C++14 | 681 ms | 45940 KB |
#include<bits/stdc++.h> using namespace std ; const int siz = 5e5 + 69 ; vector<int> adj[siz] , ar ; int deg[siz] ; void dfs(int s , int p) { if(deg[s]==1) ar.push_back(s) ; for(int t : adj[s]) { if(t==p) continue ; dfs(t,s) ; } } int main() { int n ; scanf("%d",&n) ; for(int i = 1 ; i < n ; ++i) { int u , v ; scanf("%d%d",&u,&v) ; adj[u].push_back(v) ; adj[v].push_back(u) ; ++deg[u] , ++deg[v] ; } dfs(1,0) ; int six = ar.size() ; printf("%d\n",(six+1)/2) ; int mid = (six+1)/2 ; for(int i = 0 ; i < mid ; ++i) { if((i+mid)<six) printf("%d %d\n",ar[i],ar[i+mid]) ; else printf("%d %d\n",ar[i],ar[six-1]) ; } return 0 ; }
Compilation message
# | Verdict | Execution time | Memory | Grader output |
---|---|---|---|---|
1 | Correct | 9 ms | 12032 KB | Output is correct |
2 | Correct | 9 ms | 12032 KB | Output is correct |
3 | Correct | 9 ms | 12032 KB | Output is correct |
4 | Correct | 9 ms | 12032 KB | Output is correct |
5 | Correct | 10 ms | 12032 KB | Output is correct |
6 | Correct | 10 ms | 12032 KB | Output is correct |
7 | Correct | 10 ms | 12032 KB | Output is correct |
8 | Correct | 9 ms | 12032 KB | Output is correct |
9 | Correct | 10 ms | 12032 KB | Output is correct |
10 | Correct | 9 ms | 12032 KB | Output is correct |
11 | Correct | 10 ms | 12032 KB | Output is correct |
12 | Correct | 11 ms | 12032 KB | Output is correct |
13 | Correct | 10 ms | 12032 KB | Output is correct |
14 | Correct | 11 ms | 12288 KB | Output is correct |
15 | Correct | 10 ms | 12032 KB | Output is correct |
16 | Correct | 11 ms | 12064 KB | Output is correct |
17 | Correct | 10 ms | 12032 KB | Output is correct |
18 | Correct | 9 ms | 12032 KB | Output is correct |
19 | Correct | 11 ms | 12032 KB | Output is correct |
20 | Correct | 10 ms | 12032 KB | Output is correct |
# | Verdict | Execution time | Memory | Grader output |
---|---|---|---|---|
1 | Correct | 9 ms | 12032 KB | Output is correct |
2 | Correct | 9 ms | 12032 KB | Output is correct |
3 | Correct | 9 ms | 12032 KB | Output is correct |
4 | Correct | 9 ms | 12032 KB | Output is correct |
5 | Correct | 10 ms | 12032 KB | Output is correct |
6 | Correct | 10 ms | 12032 KB | Output is correct |
7 | Correct | 10 ms | 12032 KB | Output is correct |
8 | Correct | 9 ms | 12032 KB | Output is correct |
9 | Correct | 10 ms | 12032 KB | Output is correct |
10 | Correct | 9 ms | 12032 KB | Output is correct |
11 | Correct | 10 ms | 12032 KB | Output is correct |
12 | Correct | 11 ms | 12032 KB | Output is correct |
13 | Correct | 10 ms | 12032 KB | Output is correct |
14 | Correct | 11 ms | 12288 KB | Output is correct |
15 | Correct | 10 ms | 12032 KB | Output is correct |
16 | Correct | 11 ms | 12064 KB | Output is correct |
17 | Correct | 10 ms | 12032 KB | Output is correct |
18 | Correct | 9 ms | 12032 KB | Output is correct |
19 | Correct | 11 ms | 12032 KB | Output is correct |
20 | Correct | 10 ms | 12032 KB | Output is correct |
21 | Correct | 10 ms | 12032 KB | Output is correct |
22 | Correct | 11 ms | 12160 KB | Output is correct |
23 | Correct | 11 ms | 12160 KB | Output is correct |
24 | Correct | 10 ms | 12160 KB | Output is correct |
25 | Correct | 11 ms | 12160 KB | Output is correct |
26 | Correct | 11 ms | 12160 KB | Output is correct |
27 | Correct | 10 ms | 12160 KB | Output is correct |
28 | Correct | 11 ms | 12160 KB | Output is correct |
29 | Correct | 11 ms | 12160 KB | Output is correct |
30 | Correct | 10 ms | 12032 KB | Output is correct |
31 | Correct | 11 ms | 12160 KB | Output is correct |
32 | Correct | 10 ms | 12192 KB | Output is correct |
33 | Correct | 10 ms | 12032 KB | Output is correct |
34 | Correct | 9 ms | 12032 KB | Output is correct |
35 | Correct | 10 ms | 12032 KB | Output is correct |
36 | Correct | 10 ms | 12032 KB | Output is correct |
37 | Correct | 12 ms | 12160 KB | Output is correct |
38 | Correct | 10 ms | 12160 KB | Output is correct |
39 | Correct | 10 ms | 12032 KB | Output is correct |
40 | Correct | 10 ms | 12032 KB | Output is correct |
41 | Correct | 11 ms | 12032 KB | Output is correct |
42 | Correct | 10 ms | 12032 KB | Output is correct |
43 | Correct | 10 ms | 12160 KB | Output is correct |
44 | Correct | 10 ms | 12032 KB | Output is correct |
45 | Correct | 11 ms | 12032 KB | Output is correct |
46 | Correct | 10 ms | 12160 KB | Output is correct |
47 | Correct | 10 ms | 12032 KB | Output is correct |
48 | Correct | 10 ms | 12032 KB | Output is correct |
49 | Correct | 12 ms | 12160 KB | Output is correct |
50 | Correct | 10 ms | 12032 KB | Output is correct |
51 | Correct | 11 ms | 12032 KB | Output is correct |
52 | Correct | 11 ms | 12032 KB | Output is correct |
53 | Correct | 10 ms | 12160 KB | Output is correct |
54 | Correct | 9 ms | 12032 KB | Output is correct |
55 | Correct | 9 ms | 12032 KB | Output is correct |
56 | Correct | 9 ms | 12032 KB | Output is correct |
57 | Correct | 9 ms | 12032 KB | Output is correct |
58 | Correct | 11 ms | 12160 KB | Output is correct |
# | Verdict | Execution time | Memory | Grader output |
---|---|---|---|---|
1 | Correct | 9 ms | 12032 KB | Output is correct |
2 | Correct | 9 ms | 12032 KB | Output is correct |
3 | Correct | 9 ms | 12032 KB | Output is correct |
4 | Correct | 9 ms | 12032 KB | Output is correct |
5 | Correct | 10 ms | 12032 KB | Output is correct |
6 | Correct | 10 ms | 12032 KB | Output is correct |
7 | Correct | 10 ms | 12032 KB | Output is correct |
8 | Correct | 9 ms | 12032 KB | Output is correct |
9 | Correct | 10 ms | 12032 KB | Output is correct |
10 | Correct | 9 ms | 12032 KB | Output is correct |
11 | Correct | 10 ms | 12032 KB | Output is correct |
12 | Correct | 11 ms | 12032 KB | Output is correct |
13 | Correct | 10 ms | 12032 KB | Output is correct |
14 | Correct | 11 ms | 12288 KB | Output is correct |
15 | Correct | 10 ms | 12032 KB | Output is correct |
16 | Correct | 11 ms | 12064 KB | Output is correct |
17 | Correct | 10 ms | 12032 KB | Output is correct |
18 | Correct | 9 ms | 12032 KB | Output is correct |
19 | Correct | 11 ms | 12032 KB | Output is correct |
20 | Correct | 10 ms | 12032 KB | Output is correct |
21 | Correct | 10 ms | 12032 KB | Output is correct |
22 | Correct | 11 ms | 12160 KB | Output is correct |
23 | Correct | 11 ms | 12160 KB | Output is correct |
24 | Correct | 10 ms | 12160 KB | Output is correct |
25 | Correct | 11 ms | 12160 KB | Output is correct |
26 | Correct | 11 ms | 12160 KB | Output is correct |
27 | Correct | 10 ms | 12160 KB | Output is correct |
28 | Correct | 11 ms | 12160 KB | Output is correct |
29 | Correct | 11 ms | 12160 KB | Output is correct |
30 | Correct | 10 ms | 12032 KB | Output is correct |
31 | Correct | 11 ms | 12160 KB | Output is correct |
32 | Correct | 10 ms | 12192 KB | Output is correct |
33 | Correct | 10 ms | 12032 KB | Output is correct |
34 | Correct | 9 ms | 12032 KB | Output is correct |
35 | Correct | 10 ms | 12032 KB | Output is correct |
36 | Correct | 10 ms | 12032 KB | Output is correct |
37 | Correct | 12 ms | 12160 KB | Output is correct |
38 | Correct | 10 ms | 12160 KB | Output is correct |
39 | Correct | 10 ms | 12032 KB | Output is correct |
40 | Correct | 10 ms | 12032 KB | Output is correct |
41 | Correct | 11 ms | 12032 KB | Output is correct |
42 | Correct | 10 ms | 12032 KB | Output is correct |
43 | Correct | 10 ms | 12160 KB | Output is correct |
44 | Correct | 10 ms | 12032 KB | Output is correct |
45 | Correct | 11 ms | 12032 KB | Output is correct |
46 | Correct | 10 ms | 12160 KB | Output is correct |
47 | Correct | 10 ms | 12032 KB | Output is correct |
48 | Correct | 10 ms | 12032 KB | Output is correct |
49 | Correct | 12 ms | 12160 KB | Output is correct |
50 | Correct | 10 ms | 12032 KB | Output is correct |
51 | Correct | 11 ms | 12032 KB | Output is correct |
52 | Correct | 11 ms | 12032 KB | Output is correct |
53 | Correct | 10 ms | 12160 KB | Output is correct |
54 | Correct | 9 ms | 12032 KB | Output is correct |
55 | Correct | 9 ms | 12032 KB | Output is correct |
56 | Correct | 9 ms | 12032 KB | Output is correct |
57 | Correct | 9 ms | 12032 KB | Output is correct |
58 | Correct | 11 ms | 12160 KB | Output is correct |
59 | Correct | 521 ms | 34784 KB | Output is correct |
60 | Correct | 618 ms | 36972 KB | Output is correct |
61 | Correct | 10 ms | 12032 KB | Output is correct |
62 | Correct | 10 ms | 12032 KB | Output is correct |
63 | Correct | 455 ms | 32872 KB | Output is correct |
64 | Correct | 12 ms | 12544 KB | Output is correct |
65 | Correct | 24 ms | 14080 KB | Output is correct |
66 | Correct | 222 ms | 28744 KB | Output is correct |
67 | Correct | 674 ms | 45304 KB | Output is correct |
68 | Correct | 680 ms | 45940 KB | Output is correct |
69 | Correct | 18 ms | 13184 KB | Output is correct |
70 | Correct | 131 ms | 21868 KB | Output is correct |
71 | Correct | 432 ms | 39908 KB | Output is correct |
72 | Correct | 459 ms | 39520 KB | Output is correct |
73 | Correct | 144 ms | 19696 KB | Output is correct |
74 | Correct | 622 ms | 35952 KB | Output is correct |
75 | Correct | 42 ms | 15480 KB | Output is correct |
76 | Correct | 458 ms | 39760 KB | Output is correct |
77 | Correct | 440 ms | 40028 KB | Output is correct |
78 | Correct | 50 ms | 15608 KB | Output is correct |
79 | Correct | 681 ms | 43512 KB | Output is correct |
80 | Correct | 12 ms | 12288 KB | Output is correct |
81 | Correct | 159 ms | 22000 KB | Output is correct |
82 | Correct | 529 ms | 37864 KB | Output is correct |
83 | Correct | 654 ms | 35912 KB | Output is correct |
84 | Correct | 636 ms | 35952 KB | Output is correct |
85 | Correct | 657 ms | 36088 KB | Output is correct |
86 | Correct | 648 ms | 37176 KB | Output is correct |
87 | Correct | 627 ms | 36996 KB | Output is correct |