# | 제출 시각 | 아이디 | 문제 | 언어 | 결과 | 실행 시간 | 메모리 |
---|---|---|---|---|---|---|---|
59637 | 2018-07-22T20:08:06 Z | IvanC | Network (BOI15_net) | C++17 | 754 ms | 153032 KB |
#include <bits/stdc++.h> using namespace std; const int MAXN = 5*1e5 + 10; vector<int> grafo[MAXN],folhas; int N; void dfs(int v,int p){ if(grafo[v].size() == 1) folhas.push_back(v); for(int u : grafo[v]) if(u != p) dfs(u,v); } int main(){ scanf("%d",&N); for(int i = 1;i<N;i++){ int u,v; scanf("%d %d",&u,&v); grafo[u].push_back(v); grafo[v].push_back(u); } dfs(1,-1); int ans = (folhas.size() + 1)/2; int delta = (folhas.size())/2; printf("%d\n",ans); for(int i = 0;i<ans;i++){ printf("%d %d\n",folhas[i],folhas[i + delta]); } return 0; }
Compilation message
# | 결과 | 실행 시간 | 메모리 | Grader output |
---|---|---|---|---|
1 | Correct | 14 ms | 12024 KB | Output is correct |
2 | Correct | 12 ms | 12136 KB | Output is correct |
3 | Correct | 16 ms | 12172 KB | Output is correct |
4 | Correct | 12 ms | 12172 KB | Output is correct |
5 | Correct | 15 ms | 12172 KB | Output is correct |
6 | Correct | 14 ms | 12172 KB | Output is correct |
7 | Correct | 14 ms | 12172 KB | Output is correct |
8 | Correct | 12 ms | 12268 KB | Output is correct |
9 | Correct | 16 ms | 12268 KB | Output is correct |
10 | Correct | 15 ms | 12348 KB | Output is correct |
11 | Correct | 12 ms | 12380 KB | Output is correct |
12 | Correct | 16 ms | 12380 KB | Output is correct |
13 | Correct | 16 ms | 12392 KB | Output is correct |
14 | Correct | 14 ms | 12392 KB | Output is correct |
15 | Correct | 16 ms | 12392 KB | Output is correct |
16 | Correct | 15 ms | 12392 KB | Output is correct |
17 | Correct | 16 ms | 12392 KB | Output is correct |
18 | Correct | 14 ms | 12392 KB | Output is correct |
19 | Correct | 14 ms | 12392 KB | Output is correct |
20 | Correct | 14 ms | 12392 KB | Output is correct |
# | 결과 | 실행 시간 | 메모리 | Grader output |
---|---|---|---|---|
1 | Correct | 14 ms | 12024 KB | Output is correct |
2 | Correct | 12 ms | 12136 KB | Output is correct |
3 | Correct | 16 ms | 12172 KB | Output is correct |
4 | Correct | 12 ms | 12172 KB | Output is correct |
5 | Correct | 15 ms | 12172 KB | Output is correct |
6 | Correct | 14 ms | 12172 KB | Output is correct |
7 | Correct | 14 ms | 12172 KB | Output is correct |
8 | Correct | 12 ms | 12268 KB | Output is correct |
9 | Correct | 16 ms | 12268 KB | Output is correct |
10 | Correct | 15 ms | 12348 KB | Output is correct |
11 | Correct | 12 ms | 12380 KB | Output is correct |
12 | Correct | 16 ms | 12380 KB | Output is correct |
13 | Correct | 16 ms | 12392 KB | Output is correct |
14 | Correct | 14 ms | 12392 KB | Output is correct |
15 | Correct | 16 ms | 12392 KB | Output is correct |
16 | Correct | 15 ms | 12392 KB | Output is correct |
17 | Correct | 16 ms | 12392 KB | Output is correct |
18 | Correct | 14 ms | 12392 KB | Output is correct |
19 | Correct | 14 ms | 12392 KB | Output is correct |
20 | Correct | 14 ms | 12392 KB | Output is correct |
21 | Correct | 17 ms | 12392 KB | Output is correct |
22 | Correct | 17 ms | 12472 KB | Output is correct |
23 | Correct | 14 ms | 12508 KB | Output is correct |
24 | Correct | 13 ms | 12508 KB | Output is correct |
25 | Correct | 18 ms | 12580 KB | Output is correct |
26 | Correct | 16 ms | 12612 KB | Output is correct |
27 | Correct | 18 ms | 12624 KB | Output is correct |
28 | Correct | 20 ms | 12624 KB | Output is correct |
29 | Correct | 18 ms | 12664 KB | Output is correct |
30 | Correct | 13 ms | 12664 KB | Output is correct |
31 | Correct | 16 ms | 12728 KB | Output is correct |
32 | Correct | 15 ms | 12728 KB | Output is correct |
33 | Correct | 16 ms | 12728 KB | Output is correct |
34 | Correct | 15 ms | 12728 KB | Output is correct |
35 | Correct | 18 ms | 12728 KB | Output is correct |
36 | Correct | 12 ms | 12728 KB | Output is correct |
37 | Correct | 16 ms | 12728 KB | Output is correct |
38 | Correct | 16 ms | 12732 KB | Output is correct |
39 | Correct | 16 ms | 12732 KB | Output is correct |
40 | Correct | 15 ms | 12732 KB | Output is correct |
41 | Correct | 13 ms | 12732 KB | Output is correct |
42 | Correct | 12 ms | 12732 KB | Output is correct |
43 | Correct | 15 ms | 12732 KB | Output is correct |
44 | Correct | 13 ms | 12732 KB | Output is correct |
45 | Correct | 13 ms | 12732 KB | Output is correct |
46 | Correct | 14 ms | 12732 KB | Output is correct |
47 | Correct | 14 ms | 12732 KB | Output is correct |
48 | Correct | 12 ms | 12732 KB | Output is correct |
49 | Correct | 13 ms | 12832 KB | Output is correct |
50 | Correct | 12 ms | 12832 KB | Output is correct |
51 | Correct | 13 ms | 12832 KB | Output is correct |
52 | Correct | 13 ms | 12832 KB | Output is correct |
53 | Correct | 13 ms | 12832 KB | Output is correct |
54 | Correct | 12 ms | 12832 KB | Output is correct |
55 | Correct | 13 ms | 12832 KB | Output is correct |
56 | Correct | 13 ms | 12832 KB | Output is correct |
57 | Correct | 12 ms | 12832 KB | Output is correct |
58 | Correct | 16 ms | 12836 KB | Output is correct |
# | 결과 | 실행 시간 | 메모리 | Grader output |
---|---|---|---|---|
1 | Correct | 14 ms | 12024 KB | Output is correct |
2 | Correct | 12 ms | 12136 KB | Output is correct |
3 | Correct | 16 ms | 12172 KB | Output is correct |
4 | Correct | 12 ms | 12172 KB | Output is correct |
5 | Correct | 15 ms | 12172 KB | Output is correct |
6 | Correct | 14 ms | 12172 KB | Output is correct |
7 | Correct | 14 ms | 12172 KB | Output is correct |
8 | Correct | 12 ms | 12268 KB | Output is correct |
9 | Correct | 16 ms | 12268 KB | Output is correct |
10 | Correct | 15 ms | 12348 KB | Output is correct |
11 | Correct | 12 ms | 12380 KB | Output is correct |
12 | Correct | 16 ms | 12380 KB | Output is correct |
13 | Correct | 16 ms | 12392 KB | Output is correct |
14 | Correct | 14 ms | 12392 KB | Output is correct |
15 | Correct | 16 ms | 12392 KB | Output is correct |
16 | Correct | 15 ms | 12392 KB | Output is correct |
17 | Correct | 16 ms | 12392 KB | Output is correct |
18 | Correct | 14 ms | 12392 KB | Output is correct |
19 | Correct | 14 ms | 12392 KB | Output is correct |
20 | Correct | 14 ms | 12392 KB | Output is correct |
21 | Correct | 17 ms | 12392 KB | Output is correct |
22 | Correct | 17 ms | 12472 KB | Output is correct |
23 | Correct | 14 ms | 12508 KB | Output is correct |
24 | Correct | 13 ms | 12508 KB | Output is correct |
25 | Correct | 18 ms | 12580 KB | Output is correct |
26 | Correct | 16 ms | 12612 KB | Output is correct |
27 | Correct | 18 ms | 12624 KB | Output is correct |
28 | Correct | 20 ms | 12624 KB | Output is correct |
29 | Correct | 18 ms | 12664 KB | Output is correct |
30 | Correct | 13 ms | 12664 KB | Output is correct |
31 | Correct | 16 ms | 12728 KB | Output is correct |
32 | Correct | 15 ms | 12728 KB | Output is correct |
33 | Correct | 16 ms | 12728 KB | Output is correct |
34 | Correct | 15 ms | 12728 KB | Output is correct |
35 | Correct | 18 ms | 12728 KB | Output is correct |
36 | Correct | 12 ms | 12728 KB | Output is correct |
37 | Correct | 16 ms | 12728 KB | Output is correct |
38 | Correct | 16 ms | 12732 KB | Output is correct |
39 | Correct | 16 ms | 12732 KB | Output is correct |
40 | Correct | 15 ms | 12732 KB | Output is correct |
41 | Correct | 13 ms | 12732 KB | Output is correct |
42 | Correct | 12 ms | 12732 KB | Output is correct |
43 | Correct | 15 ms | 12732 KB | Output is correct |
44 | Correct | 13 ms | 12732 KB | Output is correct |
45 | Correct | 13 ms | 12732 KB | Output is correct |
46 | Correct | 14 ms | 12732 KB | Output is correct |
47 | Correct | 14 ms | 12732 KB | Output is correct |
48 | Correct | 12 ms | 12732 KB | Output is correct |
49 | Correct | 13 ms | 12832 KB | Output is correct |
50 | Correct | 12 ms | 12832 KB | Output is correct |
51 | Correct | 13 ms | 12832 KB | Output is correct |
52 | Correct | 13 ms | 12832 KB | Output is correct |
53 | Correct | 13 ms | 12832 KB | Output is correct |
54 | Correct | 12 ms | 12832 KB | Output is correct |
55 | Correct | 13 ms | 12832 KB | Output is correct |
56 | Correct | 13 ms | 12832 KB | Output is correct |
57 | Correct | 12 ms | 12832 KB | Output is correct |
58 | Correct | 16 ms | 12836 KB | Output is correct |
59 | Correct | 549 ms | 36652 KB | Output is correct |
60 | Correct | 558 ms | 45432 KB | Output is correct |
61 | Correct | 13 ms | 45432 KB | Output is correct |
62 | Correct | 12 ms | 45432 KB | Output is correct |
63 | Correct | 402 ms | 46792 KB | Output is correct |
64 | Correct | 16 ms | 46792 KB | Output is correct |
65 | Correct | 27 ms | 46792 KB | Output is correct |
66 | Correct | 199 ms | 46912 KB | Output is correct |
67 | Correct | 661 ms | 68084 KB | Output is correct |
68 | Correct | 723 ms | 75688 KB | Output is correct |
69 | Correct | 25 ms | 75688 KB | Output is correct |
70 | Correct | 163 ms | 75688 KB | Output is correct |
71 | Correct | 406 ms | 78476 KB | Output is correct |
72 | Correct | 396 ms | 84080 KB | Output is correct |
73 | Correct | 143 ms | 84080 KB | Output is correct |
74 | Correct | 611 ms | 89128 KB | Output is correct |
75 | Correct | 55 ms | 89128 KB | Output is correct |
76 | Correct | 456 ms | 100164 KB | Output is correct |
77 | Correct | 428 ms | 107032 KB | Output is correct |
78 | Correct | 52 ms | 107032 KB | Output is correct |
79 | Correct | 647 ms | 117856 KB | Output is correct |
80 | Correct | 16 ms | 117856 KB | Output is correct |
81 | Correct | 141 ms | 117856 KB | Output is correct |
82 | Correct | 474 ms | 120764 KB | Output is correct |
83 | Correct | 665 ms | 125388 KB | Output is correct |
84 | Correct | 754 ms | 132116 KB | Output is correct |
85 | Correct | 570 ms | 138884 KB | Output is correct |
86 | Correct | 700 ms | 146308 KB | Output is correct |
87 | Correct | 709 ms | 153032 KB | Output is correct |