| # |
Submission time |
Handle |
Problem |
Language |
Result |
Execution time |
Memory |
| 993879 |
2024-06-06T17:01:00 Z |
Nexus |
Network (BOI15_net) |
C++17 |
|
1 ms |
604 KB |
#include <bits/stdc++.h>
#define ll long long
using namespace std;
const ll N=2e5+9,M=2e18+9,mod=1e9+7;
ll n,x,y,z;
map<ll,ll>m;
vector<ll>v;
int main()
{
ios::sync_with_stdio(0);
cin.tie(0);cout.tie(0);
cin>>n;
while(--n)
{
cin>>x>>y;
++m[x],++m[y];
}
for(auto i:m)
{
if(i.second==1)v.push_back(i.first);
}
n=v.size();
cout<<n/2+n%2<<'\n';
for(ll i=1;i<n;i+=2)cout<<v[i]<<' '<<v[i-1]<<'\n';
if(n&1)cout<<v[n-1]<<' '<<v[0];
}
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
348 KB |
Output is correct |
| 2 |
Correct |
0 ms |
348 KB |
Output is correct |
| 3 |
Correct |
0 ms |
348 KB |
Output is correct |
| 4 |
Correct |
0 ms |
348 KB |
Output is correct |
| 5 |
Correct |
0 ms |
348 KB |
Output is correct |
| 6 |
Correct |
1 ms |
604 KB |
Output is correct |
| 7 |
Correct |
0 ms |
348 KB |
Output is correct |
| 8 |
Correct |
0 ms |
348 KB |
Output is correct |
| 9 |
Correct |
1 ms |
348 KB |
Output is correct |
| 10 |
Incorrect |
0 ms |
348 KB |
Breaking single line is causing network to disconnect. |
| 11 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
348 KB |
Output is correct |
| 2 |
Correct |
0 ms |
348 KB |
Output is correct |
| 3 |
Correct |
0 ms |
348 KB |
Output is correct |
| 4 |
Correct |
0 ms |
348 KB |
Output is correct |
| 5 |
Correct |
0 ms |
348 KB |
Output is correct |
| 6 |
Correct |
1 ms |
604 KB |
Output is correct |
| 7 |
Correct |
0 ms |
348 KB |
Output is correct |
| 8 |
Correct |
0 ms |
348 KB |
Output is correct |
| 9 |
Correct |
1 ms |
348 KB |
Output is correct |
| 10 |
Incorrect |
0 ms |
348 KB |
Breaking single line is causing network to disconnect. |
| 11 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
348 KB |
Output is correct |
| 2 |
Correct |
0 ms |
348 KB |
Output is correct |
| 3 |
Correct |
0 ms |
348 KB |
Output is correct |
| 4 |
Correct |
0 ms |
348 KB |
Output is correct |
| 5 |
Correct |
0 ms |
348 KB |
Output is correct |
| 6 |
Correct |
1 ms |
604 KB |
Output is correct |
| 7 |
Correct |
0 ms |
348 KB |
Output is correct |
| 8 |
Correct |
0 ms |
348 KB |
Output is correct |
| 9 |
Correct |
1 ms |
348 KB |
Output is correct |
| 10 |
Incorrect |
0 ms |
348 KB |
Breaking single line is causing network to disconnect. |
| 11 |
Halted |
0 ms |
0 KB |
- |
