| # |
Submission time |
Handle |
Problem |
Language |
Result |
Execution time |
Memory |
| 406297 |
2021-05-17T10:38:45 Z |
victoriad |
Network (BOI15_net) |
C++14 |
|
497 ms |
56260 KB |
#include <cmath>
#include <cstdio>
#include <vector>
#include <iostream>
#include <algorithm>
#include <utility>
#include <queue>
#include <map>
#include <iomanip>
using namespace std;
void dfs(vector<int>&nodos,vector<vector<int> >&g,int & con,int actu,vector<bool>&v){
v[actu]=true;
if(g[actu].size()==1){
nodos.push_back(actu);
con++;
}
for(int c:g[actu]){
if(!v[c]){
dfs(nodos,g,con,c,v);
}
}
}
int main(){
ios::sync_with_stdio(false);
cin.tie(NULL);
int n,a,b;
cin>>n;
vector<vector<int> >g(n);
for(int i=0;i<n-1;i++){
cin>>a>>b;
a--;
b--;
g[a].push_back(b);
g[b].push_back(a);
}
vector<bool>v(n,false);
vector<int>nodos;
int con=0;
dfs(nodos,g,con,0,v);
if(con&1){
cout<<con/2+1<<"\n";
}
else{
cout<<con/2<<"\n";
}
for(int i=0;i<con/2;i++){
cout<<nodos[i]+1<<" "<<nodos[i+(con+1)/2]+1<<"\n";
}
if(con&1){
cout<<nodos[con/2]+1<<" ";
int p=g[con/2][0];
for(int i=0;i<n;i++){
if(i!=p && i!=nodos[con/2]){
cout<<i+1<<"\n";
break;
}
}
}
return 0;
}
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
204 KB |
Output is correct |
| 2 |
Correct |
1 ms |
204 KB |
Output is correct |
| 3 |
Correct |
1 ms |
204 KB |
Output is correct |
| 4 |
Correct |
1 ms |
204 KB |
Output is correct |
| 5 |
Correct |
1 ms |
204 KB |
Output is correct |
| 6 |
Correct |
1 ms |
204 KB |
Output is correct |
| 7 |
Correct |
1 ms |
204 KB |
Output is correct |
| 8 |
Correct |
1 ms |
204 KB |
Output is correct |
| 9 |
Correct |
1 ms |
204 KB |
Output is correct |
| 10 |
Correct |
1 ms |
204 KB |
Output is correct |
| 11 |
Correct |
1 ms |
204 KB |
Output is correct |
| 12 |
Correct |
1 ms |
204 KB |
Output is correct |
| 13 |
Correct |
1 ms |
204 KB |
Output is correct |
| 14 |
Correct |
1 ms |
204 KB |
Output is correct |
| 15 |
Correct |
1 ms |
204 KB |
Output is correct |
| 16 |
Correct |
1 ms |
204 KB |
Output is correct |
| 17 |
Correct |
1 ms |
204 KB |
Output is correct |
| 18 |
Correct |
1 ms |
204 KB |
Output is correct |
| 19 |
Correct |
1 ms |
204 KB |
Output is correct |
| 20 |
Correct |
1 ms |
204 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
204 KB |
Output is correct |
| 2 |
Correct |
1 ms |
204 KB |
Output is correct |
| 3 |
Correct |
1 ms |
204 KB |
Output is correct |
| 4 |
Correct |
1 ms |
204 KB |
Output is correct |
| 5 |
Correct |
1 ms |
204 KB |
Output is correct |
| 6 |
Correct |
1 ms |
204 KB |
Output is correct |
| 7 |
Correct |
1 ms |
204 KB |
Output is correct |
| 8 |
Correct |
1 ms |
204 KB |
Output is correct |
| 9 |
Correct |
1 ms |
204 KB |
Output is correct |
| 10 |
Correct |
1 ms |
204 KB |
Output is correct |
| 11 |
Correct |
1 ms |
204 KB |
Output is correct |
| 12 |
Correct |
1 ms |
204 KB |
Output is correct |
| 13 |
Correct |
1 ms |
204 KB |
Output is correct |
| 14 |
Correct |
1 ms |
204 KB |
Output is correct |
| 15 |
Correct |
1 ms |
204 KB |
Output is correct |
| 16 |
Correct |
1 ms |
204 KB |
Output is correct |
| 17 |
Correct |
1 ms |
204 KB |
Output is correct |
| 18 |
Correct |
1 ms |
204 KB |
Output is correct |
| 19 |
Correct |
1 ms |
204 KB |
Output is correct |
| 20 |
Correct |
1 ms |
204 KB |
Output is correct |
| 21 |
Correct |
1 ms |
204 KB |
Output is correct |
| 22 |
Correct |
2 ms |
460 KB |
Output is correct |
| 23 |
Correct |
2 ms |
332 KB |
Output is correct |
| 24 |
Correct |
1 ms |
332 KB |
Output is correct |
| 25 |
Correct |
2 ms |
384 KB |
Output is correct |
| 26 |
Correct |
2 ms |
332 KB |
Output is correct |
| 27 |
Correct |
2 ms |
332 KB |
Output is correct |
| 28 |
Correct |
2 ms |
332 KB |
Output is correct |
| 29 |
Correct |
1 ms |
332 KB |
Output is correct |
| 30 |
Correct |
1 ms |
204 KB |
Output is correct |
| 31 |
Correct |
2 ms |
332 KB |
Output is correct |
| 32 |
Correct |
1 ms |
204 KB |
Output is correct |
| 33 |
Correct |
1 ms |
204 KB |
Output is correct |
| 34 |
Correct |
1 ms |
204 KB |
Output is correct |
| 35 |
Correct |
1 ms |
204 KB |
Output is correct |
| 36 |
Correct |
1 ms |
316 KB |
Output is correct |
| 37 |
Correct |
1 ms |
332 KB |
Output is correct |
| 38 |
Correct |
1 ms |
332 KB |
Output is correct |
| 39 |
Correct |
1 ms |
204 KB |
Output is correct |
| 40 |
Correct |
1 ms |
204 KB |
Output is correct |
| 41 |
Correct |
1 ms |
204 KB |
Output is correct |
| 42 |
Correct |
1 ms |
332 KB |
Output is correct |
| 43 |
Correct |
1 ms |
332 KB |
Output is correct |
| 44 |
Correct |
1 ms |
204 KB |
Output is correct |
| 45 |
Correct |
1 ms |
332 KB |
Output is correct |
| 46 |
Correct |
1 ms |
332 KB |
Output is correct |
| 47 |
Correct |
1 ms |
204 KB |
Output is correct |
| 48 |
Correct |
1 ms |
328 KB |
Output is correct |
| 49 |
Correct |
2 ms |
332 KB |
Output is correct |
| 50 |
Correct |
1 ms |
204 KB |
Output is correct |
| 51 |
Correct |
1 ms |
204 KB |
Output is correct |
| 52 |
Correct |
1 ms |
332 KB |
Output is correct |
| 53 |
Correct |
1 ms |
332 KB |
Output is correct |
| 54 |
Correct |
1 ms |
204 KB |
Output is correct |
| 55 |
Correct |
1 ms |
332 KB |
Output is correct |
| 56 |
Correct |
1 ms |
308 KB |
Output is correct |
| 57 |
Correct |
1 ms |
312 KB |
Output is correct |
| 58 |
Correct |
2 ms |
452 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
204 KB |
Output is correct |
| 2 |
Correct |
1 ms |
204 KB |
Output is correct |
| 3 |
Correct |
1 ms |
204 KB |
Output is correct |
| 4 |
Correct |
1 ms |
204 KB |
Output is correct |
| 5 |
Correct |
1 ms |
204 KB |
Output is correct |
| 6 |
Correct |
1 ms |
204 KB |
Output is correct |
| 7 |
Correct |
1 ms |
204 KB |
Output is correct |
| 8 |
Correct |
1 ms |
204 KB |
Output is correct |
| 9 |
Correct |
1 ms |
204 KB |
Output is correct |
| 10 |
Correct |
1 ms |
204 KB |
Output is correct |
| 11 |
Correct |
1 ms |
204 KB |
Output is correct |
| 12 |
Correct |
1 ms |
204 KB |
Output is correct |
| 13 |
Correct |
1 ms |
204 KB |
Output is correct |
| 14 |
Correct |
1 ms |
204 KB |
Output is correct |
| 15 |
Correct |
1 ms |
204 KB |
Output is correct |
| 16 |
Correct |
1 ms |
204 KB |
Output is correct |
| 17 |
Correct |
1 ms |
204 KB |
Output is correct |
| 18 |
Correct |
1 ms |
204 KB |
Output is correct |
| 19 |
Correct |
1 ms |
204 KB |
Output is correct |
| 20 |
Correct |
1 ms |
204 KB |
Output is correct |
| 21 |
Correct |
1 ms |
204 KB |
Output is correct |
| 22 |
Correct |
2 ms |
460 KB |
Output is correct |
| 23 |
Correct |
2 ms |
332 KB |
Output is correct |
| 24 |
Correct |
1 ms |
332 KB |
Output is correct |
| 25 |
Correct |
2 ms |
384 KB |
Output is correct |
| 26 |
Correct |
2 ms |
332 KB |
Output is correct |
| 27 |
Correct |
2 ms |
332 KB |
Output is correct |
| 28 |
Correct |
2 ms |
332 KB |
Output is correct |
| 29 |
Correct |
1 ms |
332 KB |
Output is correct |
| 30 |
Correct |
1 ms |
204 KB |
Output is correct |
| 31 |
Correct |
2 ms |
332 KB |
Output is correct |
| 32 |
Correct |
1 ms |
204 KB |
Output is correct |
| 33 |
Correct |
1 ms |
204 KB |
Output is correct |
| 34 |
Correct |
1 ms |
204 KB |
Output is correct |
| 35 |
Correct |
1 ms |
204 KB |
Output is correct |
| 36 |
Correct |
1 ms |
316 KB |
Output is correct |
| 37 |
Correct |
1 ms |
332 KB |
Output is correct |
| 38 |
Correct |
1 ms |
332 KB |
Output is correct |
| 39 |
Correct |
1 ms |
204 KB |
Output is correct |
| 40 |
Correct |
1 ms |
204 KB |
Output is correct |
| 41 |
Correct |
1 ms |
204 KB |
Output is correct |
| 42 |
Correct |
1 ms |
332 KB |
Output is correct |
| 43 |
Correct |
1 ms |
332 KB |
Output is correct |
| 44 |
Correct |
1 ms |
204 KB |
Output is correct |
| 45 |
Correct |
1 ms |
332 KB |
Output is correct |
| 46 |
Correct |
1 ms |
332 KB |
Output is correct |
| 47 |
Correct |
1 ms |
204 KB |
Output is correct |
| 48 |
Correct |
1 ms |
328 KB |
Output is correct |
| 49 |
Correct |
2 ms |
332 KB |
Output is correct |
| 50 |
Correct |
1 ms |
204 KB |
Output is correct |
| 51 |
Correct |
1 ms |
204 KB |
Output is correct |
| 52 |
Correct |
1 ms |
332 KB |
Output is correct |
| 53 |
Correct |
1 ms |
332 KB |
Output is correct |
| 54 |
Correct |
1 ms |
204 KB |
Output is correct |
| 55 |
Correct |
1 ms |
332 KB |
Output is correct |
| 56 |
Correct |
1 ms |
308 KB |
Output is correct |
| 57 |
Correct |
1 ms |
312 KB |
Output is correct |
| 58 |
Correct |
2 ms |
452 KB |
Output is correct |
| 59 |
Correct |
387 ms |
34860 KB |
Output is correct |
| 60 |
Correct |
467 ms |
38804 KB |
Output is correct |
| 61 |
Correct |
1 ms |
204 KB |
Output is correct |
| 62 |
Correct |
1 ms |
312 KB |
Output is correct |
| 63 |
Correct |
323 ms |
31248 KB |
Output is correct |
| 64 |
Correct |
3 ms |
960 KB |
Output is correct |
| 65 |
Correct |
11 ms |
3280 KB |
Output is correct |
| 66 |
Correct |
132 ms |
25652 KB |
Output is correct |
| 67 |
Correct |
497 ms |
55348 KB |
Output is correct |
| 68 |
Correct |
487 ms |
56260 KB |
Output is correct |
| 69 |
Correct |
7 ms |
1484 KB |
Output is correct |
| 70 |
Correct |
85 ms |
13216 KB |
Output is correct |
| 71 |
Correct |
314 ms |
41836 KB |
Output is correct |
| 72 |
Correct |
341 ms |
40696 KB |
Output is correct |
| 73 |
Correct |
88 ms |
10564 KB |
Output is correct |
| 74 |
Correct |
480 ms |
37752 KB |
Output is correct |
| 75 |
Correct |
26 ms |
4816 KB |
Output is correct |
| 76 |
Correct |
353 ms |
41632 KB |
Output is correct |
| 77 |
Correct |
328 ms |
41724 KB |
Output is correct |
| 78 |
Correct |
30 ms |
5444 KB |
Output is correct |
| 79 |
Correct |
491 ms |
52412 KB |
Output is correct |
| 80 |
Correct |
3 ms |
588 KB |
Output is correct |
| 81 |
Correct |
103 ms |
13464 KB |
Output is correct |
| 82 |
Correct |
394 ms |
39732 KB |
Output is correct |
| 83 |
Correct |
464 ms |
37680 KB |
Output is correct |
| 84 |
Correct |
471 ms |
37728 KB |
Output is correct |
| 85 |
Correct |
475 ms |
37792 KB |
Output is correct |
| 86 |
Correct |
468 ms |
38792 KB |
Output is correct |
| 87 |
Correct |
488 ms |
38816 KB |
Output is correct |
