| # |
Submission time |
Handle |
Problem |
Language |
Result |
Execution time |
Memory |
| 748406 |
2023-05-26T08:37:07 Z |
mariowong |
Network (BOI15_net) |
C++14 |
|
1 ms |
332 KB |
#include <bits/stdc++.h>
using namespace std;
int deg[100005];
int main(){
ios::sync_with_stdio(false);
int n;
cin >> n;
for (int i=1;i<n;i++){
int u,v;
cin >> u >> v;
deg[u]++; deg[v]++;
}
int cnt=0;
for (int i=1;i<=n;i++){
if (deg[i] == 1) cnt++;
}
cout << (cnt+1)/2 << "\n";
int node=0;
for (int i=1;i<=n;i++){
if (deg[i] == 1){
if (node == 0) node=i;
else{
cout << node << " " << i << "\n";
node=0;
}
}
}
for (int i=1;i<=n;i++){
if (deg[i] == 1 && node != 0){
cout << node << " " << i << "\n";
break;
}
}
return 0;
}
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
0 ms |
212 KB |
Output is correct |
| 2 |
Correct |
0 ms |
332 KB |
Output is correct |
| 3 |
Correct |
0 ms |
212 KB |
Output is correct |
| 4 |
Correct |
0 ms |
324 KB |
Output is correct |
| 5 |
Correct |
1 ms |
324 KB |
Output is correct |
| 6 |
Correct |
1 ms |
212 KB |
Output is correct |
| 7 |
Correct |
1 ms |
212 KB |
Output is correct |
| 8 |
Correct |
0 ms |
212 KB |
Output is correct |
| 9 |
Correct |
1 ms |
212 KB |
Output is correct |
| 10 |
Incorrect |
0 ms |
332 KB |
Breaking single line is causing network to disconnect. |
| 11 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
0 ms |
212 KB |
Output is correct |
| 2 |
Correct |
0 ms |
332 KB |
Output is correct |
| 3 |
Correct |
0 ms |
212 KB |
Output is correct |
| 4 |
Correct |
0 ms |
324 KB |
Output is correct |
| 5 |
Correct |
1 ms |
324 KB |
Output is correct |
| 6 |
Correct |
1 ms |
212 KB |
Output is correct |
| 7 |
Correct |
1 ms |
212 KB |
Output is correct |
| 8 |
Correct |
0 ms |
212 KB |
Output is correct |
| 9 |
Correct |
1 ms |
212 KB |
Output is correct |
| 10 |
Incorrect |
0 ms |
332 KB |
Breaking single line is causing network to disconnect. |
| 11 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
0 ms |
212 KB |
Output is correct |
| 2 |
Correct |
0 ms |
332 KB |
Output is correct |
| 3 |
Correct |
0 ms |
212 KB |
Output is correct |
| 4 |
Correct |
0 ms |
324 KB |
Output is correct |
| 5 |
Correct |
1 ms |
324 KB |
Output is correct |
| 6 |
Correct |
1 ms |
212 KB |
Output is correct |
| 7 |
Correct |
1 ms |
212 KB |
Output is correct |
| 8 |
Correct |
0 ms |
212 KB |
Output is correct |
| 9 |
Correct |
1 ms |
212 KB |
Output is correct |
| 10 |
Incorrect |
0 ms |
332 KB |
Breaking single line is causing network to disconnect. |
| 11 |
Halted |
0 ms |
0 KB |
- |
