# |
Submission time |
Handle |
Problem |
Language |
Result |
Execution time |
Memory |
830214 |
2023-08-19T00:00:27 Z |
yusuf12360 |
Network (BOI15_net) |
C++14 |
|
1 ms |
316 KB |
#include<bits/stdc++.h>
#define int long long
using namespace std;
signed main() {
ios::sync_with_stdio(0); cin.tie(0); cout.tie(0);
int n; cin >> n;
vector<vector<int>> adj(n);
vector<pair<int, int>> leaf, ans;
map<int, int> mp;
for(int i=1; i<n; i++) {
int u, v; cin >> u >> v; --u; --v;
adj[u].push_back(v);
adj[v].push_back(u);
} int cnt=0;
for(int i=0; i<n; i++) {
if(adj[i].size()>1) continue;
leaf.push_back({adj[i][0], i});
cnt++;
}
sort(leaf.begin(), leaf.end());
for(int i=0; i<cnt/2; i++)
ans.push_back({leaf[i].second, leaf[i+cnt/2].second});
cout << ans.size() << '\n';
for(auto p : ans) cout << p.first << ' ' << p.second << '\n';
return 0;
}
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Incorrect |
1 ms |
316 KB |
Breaking single line is causing network to disconnect. |
2 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Incorrect |
1 ms |
316 KB |
Breaking single line is causing network to disconnect. |
2 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Incorrect |
1 ms |
316 KB |
Breaking single line is causing network to disconnect. |
2 |
Halted |
0 ms |
0 KB |
- |