| # |
Submission time |
Handle |
Problem |
Language |
Result |
Execution time |
Memory |
| 151239 |
2019-09-02T09:44:55 Z |
cfalas |
Network (BOI15_net) |
C++14 |
|
1455 ms |
53260 KB |
#include<bits/stdc++.h>
using namespace std;
vector<vector<int> > adj;
vector<int> ans;
void dfs(int s, int p=-1){
if(adj[s].size()==1){
ans.push_back(s);
}
for(auto v : adj[s] ){
if(v!=p) dfs(v, s);
}
}
int main(){
int n;
adj.assign(1000000, vector<int>());
cin>>n;
for(int i=0;i<n-1;i++){
int b, c;
cin>>b>>c;
adj[b].push_back(c);
adj[c].push_back(b);
}
dfs(1);
cout<<(ans.size()+1)/2<<endl;
for(int i=0;i<(ans.size()+1)/2;i++){
cout<<ans[i]<<" "<<ans[(i+(ans.size()+1)/2)%ans.size()]<<endl;
}
}
Compilation message
net.cpp: In function 'int main()':
net.cpp:27:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
for(int i=0;i<(ans.size()+1)/2;i++){
~^~~~~~~~~~~~~~~~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
26 ms |
23932 KB |
Output is correct |
| 2 |
Correct |
26 ms |
23800 KB |
Output is correct |
| 3 |
Correct |
26 ms |
23800 KB |
Output is correct |
| 4 |
Correct |
26 ms |
23800 KB |
Output is correct |
| 5 |
Correct |
26 ms |
23820 KB |
Output is correct |
| 6 |
Correct |
26 ms |
23800 KB |
Output is correct |
| 7 |
Correct |
25 ms |
23776 KB |
Output is correct |
| 8 |
Correct |
25 ms |
23800 KB |
Output is correct |
| 9 |
Correct |
26 ms |
23800 KB |
Output is correct |
| 10 |
Correct |
26 ms |
23748 KB |
Output is correct |
| 11 |
Correct |
26 ms |
23800 KB |
Output is correct |
| 12 |
Correct |
26 ms |
23800 KB |
Output is correct |
| 13 |
Correct |
30 ms |
23800 KB |
Output is correct |
| 14 |
Correct |
25 ms |
23800 KB |
Output is correct |
| 15 |
Correct |
26 ms |
23748 KB |
Output is correct |
| 16 |
Correct |
30 ms |
23800 KB |
Output is correct |
| 17 |
Correct |
26 ms |
23800 KB |
Output is correct |
| 18 |
Correct |
26 ms |
23800 KB |
Output is correct |
| 19 |
Correct |
26 ms |
23800 KB |
Output is correct |
| 20 |
Correct |
26 ms |
23800 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
26 ms |
23932 KB |
Output is correct |
| 2 |
Correct |
26 ms |
23800 KB |
Output is correct |
| 3 |
Correct |
26 ms |
23800 KB |
Output is correct |
| 4 |
Correct |
26 ms |
23800 KB |
Output is correct |
| 5 |
Correct |
26 ms |
23820 KB |
Output is correct |
| 6 |
Correct |
26 ms |
23800 KB |
Output is correct |
| 7 |
Correct |
25 ms |
23776 KB |
Output is correct |
| 8 |
Correct |
25 ms |
23800 KB |
Output is correct |
| 9 |
Correct |
26 ms |
23800 KB |
Output is correct |
| 10 |
Correct |
26 ms |
23748 KB |
Output is correct |
| 11 |
Correct |
26 ms |
23800 KB |
Output is correct |
| 12 |
Correct |
26 ms |
23800 KB |
Output is correct |
| 13 |
Correct |
30 ms |
23800 KB |
Output is correct |
| 14 |
Correct |
25 ms |
23800 KB |
Output is correct |
| 15 |
Correct |
26 ms |
23748 KB |
Output is correct |
| 16 |
Correct |
30 ms |
23800 KB |
Output is correct |
| 17 |
Correct |
26 ms |
23800 KB |
Output is correct |
| 18 |
Correct |
26 ms |
23800 KB |
Output is correct |
| 19 |
Correct |
26 ms |
23800 KB |
Output is correct |
| 20 |
Correct |
26 ms |
23800 KB |
Output is correct |
| 21 |
Correct |
25 ms |
23800 KB |
Output is correct |
| 22 |
Correct |
30 ms |
24028 KB |
Output is correct |
| 23 |
Correct |
30 ms |
23928 KB |
Output is correct |
| 24 |
Correct |
30 ms |
23932 KB |
Output is correct |
| 25 |
Correct |
30 ms |
23928 KB |
Output is correct |
| 26 |
Correct |
28 ms |
23928 KB |
Output is correct |
| 27 |
Correct |
29 ms |
23928 KB |
Output is correct |
| 28 |
Correct |
30 ms |
23932 KB |
Output is correct |
| 29 |
Correct |
29 ms |
23928 KB |
Output is correct |
| 30 |
Correct |
26 ms |
23800 KB |
Output is correct |
| 31 |
Correct |
30 ms |
23928 KB |
Output is correct |
| 32 |
Correct |
26 ms |
23800 KB |
Output is correct |
| 33 |
Correct |
26 ms |
23800 KB |
Output is correct |
| 34 |
Correct |
26 ms |
23800 KB |
Output is correct |
| 35 |
Correct |
26 ms |
23800 KB |
Output is correct |
| 36 |
Correct |
26 ms |
23800 KB |
Output is correct |
| 37 |
Correct |
27 ms |
23896 KB |
Output is correct |
| 38 |
Correct |
28 ms |
23928 KB |
Output is correct |
| 39 |
Correct |
27 ms |
23820 KB |
Output is correct |
| 40 |
Correct |
26 ms |
23800 KB |
Output is correct |
| 41 |
Correct |
26 ms |
23800 KB |
Output is correct |
| 42 |
Correct |
27 ms |
23812 KB |
Output is correct |
| 43 |
Correct |
28 ms |
23928 KB |
Output is correct |
| 44 |
Correct |
26 ms |
23928 KB |
Output is correct |
| 45 |
Correct |
26 ms |
23800 KB |
Output is correct |
| 46 |
Correct |
28 ms |
23800 KB |
Output is correct |
| 47 |
Correct |
26 ms |
23800 KB |
Output is correct |
| 48 |
Correct |
26 ms |
23800 KB |
Output is correct |
| 49 |
Correct |
29 ms |
23800 KB |
Output is correct |
| 50 |
Correct |
31 ms |
23800 KB |
Output is correct |
| 51 |
Correct |
26 ms |
23764 KB |
Output is correct |
| 52 |
Correct |
28 ms |
23800 KB |
Output is correct |
| 53 |
Correct |
27 ms |
23800 KB |
Output is correct |
| 54 |
Correct |
26 ms |
23800 KB |
Output is correct |
| 55 |
Correct |
27 ms |
23800 KB |
Output is correct |
| 56 |
Correct |
27 ms |
23800 KB |
Output is correct |
| 57 |
Correct |
27 ms |
23800 KB |
Output is correct |
| 58 |
Correct |
31 ms |
23928 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
26 ms |
23932 KB |
Output is correct |
| 2 |
Correct |
26 ms |
23800 KB |
Output is correct |
| 3 |
Correct |
26 ms |
23800 KB |
Output is correct |
| 4 |
Correct |
26 ms |
23800 KB |
Output is correct |
| 5 |
Correct |
26 ms |
23820 KB |
Output is correct |
| 6 |
Correct |
26 ms |
23800 KB |
Output is correct |
| 7 |
Correct |
25 ms |
23776 KB |
Output is correct |
| 8 |
Correct |
25 ms |
23800 KB |
Output is correct |
| 9 |
Correct |
26 ms |
23800 KB |
Output is correct |
| 10 |
Correct |
26 ms |
23748 KB |
Output is correct |
| 11 |
Correct |
26 ms |
23800 KB |
Output is correct |
| 12 |
Correct |
26 ms |
23800 KB |
Output is correct |
| 13 |
Correct |
30 ms |
23800 KB |
Output is correct |
| 14 |
Correct |
25 ms |
23800 KB |
Output is correct |
| 15 |
Correct |
26 ms |
23748 KB |
Output is correct |
| 16 |
Correct |
30 ms |
23800 KB |
Output is correct |
| 17 |
Correct |
26 ms |
23800 KB |
Output is correct |
| 18 |
Correct |
26 ms |
23800 KB |
Output is correct |
| 19 |
Correct |
26 ms |
23800 KB |
Output is correct |
| 20 |
Correct |
26 ms |
23800 KB |
Output is correct |
| 21 |
Correct |
25 ms |
23800 KB |
Output is correct |
| 22 |
Correct |
30 ms |
24028 KB |
Output is correct |
| 23 |
Correct |
30 ms |
23928 KB |
Output is correct |
| 24 |
Correct |
30 ms |
23932 KB |
Output is correct |
| 25 |
Correct |
30 ms |
23928 KB |
Output is correct |
| 26 |
Correct |
28 ms |
23928 KB |
Output is correct |
| 27 |
Correct |
29 ms |
23928 KB |
Output is correct |
| 28 |
Correct |
30 ms |
23932 KB |
Output is correct |
| 29 |
Correct |
29 ms |
23928 KB |
Output is correct |
| 30 |
Correct |
26 ms |
23800 KB |
Output is correct |
| 31 |
Correct |
30 ms |
23928 KB |
Output is correct |
| 32 |
Correct |
26 ms |
23800 KB |
Output is correct |
| 33 |
Correct |
26 ms |
23800 KB |
Output is correct |
| 34 |
Correct |
26 ms |
23800 KB |
Output is correct |
| 35 |
Correct |
26 ms |
23800 KB |
Output is correct |
| 36 |
Correct |
26 ms |
23800 KB |
Output is correct |
| 37 |
Correct |
27 ms |
23896 KB |
Output is correct |
| 38 |
Correct |
28 ms |
23928 KB |
Output is correct |
| 39 |
Correct |
27 ms |
23820 KB |
Output is correct |
| 40 |
Correct |
26 ms |
23800 KB |
Output is correct |
| 41 |
Correct |
26 ms |
23800 KB |
Output is correct |
| 42 |
Correct |
27 ms |
23812 KB |
Output is correct |
| 43 |
Correct |
28 ms |
23928 KB |
Output is correct |
| 44 |
Correct |
26 ms |
23928 KB |
Output is correct |
| 45 |
Correct |
26 ms |
23800 KB |
Output is correct |
| 46 |
Correct |
28 ms |
23800 KB |
Output is correct |
| 47 |
Correct |
26 ms |
23800 KB |
Output is correct |
| 48 |
Correct |
26 ms |
23800 KB |
Output is correct |
| 49 |
Correct |
29 ms |
23800 KB |
Output is correct |
| 50 |
Correct |
31 ms |
23800 KB |
Output is correct |
| 51 |
Correct |
26 ms |
23764 KB |
Output is correct |
| 52 |
Correct |
28 ms |
23800 KB |
Output is correct |
| 53 |
Correct |
27 ms |
23800 KB |
Output is correct |
| 54 |
Correct |
26 ms |
23800 KB |
Output is correct |
| 55 |
Correct |
27 ms |
23800 KB |
Output is correct |
| 56 |
Correct |
27 ms |
23800 KB |
Output is correct |
| 57 |
Correct |
27 ms |
23800 KB |
Output is correct |
| 58 |
Correct |
31 ms |
23928 KB |
Output is correct |
| 59 |
Correct |
1213 ms |
41996 KB |
Output is correct |
| 60 |
Correct |
1380 ms |
44084 KB |
Output is correct |
| 61 |
Correct |
26 ms |
23800 KB |
Output is correct |
| 62 |
Correct |
26 ms |
23800 KB |
Output is correct |
| 63 |
Correct |
1109 ms |
40136 KB |
Output is correct |
| 64 |
Correct |
32 ms |
24312 KB |
Output is correct |
| 65 |
Correct |
59 ms |
25464 KB |
Output is correct |
| 66 |
Correct |
340 ms |
37536 KB |
Output is correct |
| 67 |
Correct |
1024 ms |
52572 KB |
Output is correct |
| 68 |
Correct |
1050 ms |
53260 KB |
Output is correct |
| 69 |
Correct |
63 ms |
24696 KB |
Output is correct |
| 70 |
Correct |
444 ms |
31296 KB |
Output is correct |
| 71 |
Correct |
1455 ms |
47408 KB |
Output is correct |
| 72 |
Correct |
1408 ms |
46520 KB |
Output is correct |
| 73 |
Correct |
334 ms |
29500 KB |
Output is correct |
| 74 |
Correct |
1269 ms |
43288 KB |
Output is correct |
| 75 |
Correct |
167 ms |
26816 KB |
Output is correct |
| 76 |
Correct |
1428 ms |
46940 KB |
Output is correct |
| 77 |
Correct |
1443 ms |
47552 KB |
Output is correct |
| 78 |
Correct |
134 ms |
26916 KB |
Output is correct |
| 79 |
Correct |
1000 ms |
50764 KB |
Output is correct |
| 80 |
Correct |
34 ms |
24056 KB |
Output is correct |
| 81 |
Correct |
456 ms |
31588 KB |
Output is correct |
| 82 |
Correct |
1363 ms |
45376 KB |
Output is correct |
| 83 |
Correct |
1265 ms |
43164 KB |
Output is correct |
| 84 |
Correct |
1253 ms |
43220 KB |
Output is correct |
| 85 |
Correct |
1251 ms |
43304 KB |
Output is correct |
| 86 |
Correct |
1364 ms |
44292 KB |
Output is correct |
| 87 |
Correct |
1368 ms |
44276 KB |
Output is correct |
