| # |
Submission time |
Handle |
Problem |
Language |
Result |
Execution time |
Memory |
| 900115 |
2024-01-07T16:38:48 Z |
LCJLY |
Network (BOI15_net) |
C++14 |
|
345 ms |
48592 KB |
#include <bits/stdc++.h>
using namespace std;
#define int long long
#define ld long double
#define show(x,y) cout << y << " " << #x << endl;
#define show2(x,y,i,j) cout << y << " " << #x << " " << j << " " << #i << endl;
#define show3(x,y,i,j,p,q) cout << y << " " << #x << " " << j << " " << #i << " " << q << " " << #p << endl;
#define show4(x,y) for(auto it:x) cout << it << " "; cout << #y << endl;
typedef pair<long long,long long>pii;
typedef pair<pii,pii>pi2;
vector<int>adj[500005];
vector<int>leaf;
void dfs(int index, int par){
if(adj[index].size()==1)leaf.push_back(index);
for(auto it:adj[index]){
if(it==par) continue;
dfs(it,index);
}
}
void solve(){
int n;
cin >> n;
int temp,temp2;
for(int x=0;x<n-1;x++){
cin >> temp >> temp2;
adj[temp].push_back(temp2);
adj[temp2].push_back(temp);
}
for(int x=1;x<=n;x++){
if(adj[x].size()>1){
dfs(x,-1);
break;
}
}
int sz=leaf.size();
cout << (sz+1)/2 << "\n";
for(int x=sz/2;x<sz;x++){
cout << leaf[x] << " " << leaf[x-sz/2] << "\n";
}
cout << "\n";
}
int32_t main(){
ios::sync_with_stdio(0);
cin.tie(0);
int t=1;
//cin >> t;
while(t--){
solve();
}
}
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
3 ms |
12120 KB |
Output is correct |
| 2 |
Correct |
4 ms |
12120 KB |
Output is correct |
| 3 |
Correct |
3 ms |
12124 KB |
Output is correct |
| 4 |
Correct |
3 ms |
12124 KB |
Output is correct |
| 5 |
Correct |
3 ms |
12124 KB |
Output is correct |
| 6 |
Correct |
3 ms |
12124 KB |
Output is correct |
| 7 |
Correct |
5 ms |
12120 KB |
Output is correct |
| 8 |
Correct |
3 ms |
12124 KB |
Output is correct |
| 9 |
Correct |
3 ms |
12124 KB |
Output is correct |
| 10 |
Correct |
3 ms |
12120 KB |
Output is correct |
| 11 |
Correct |
3 ms |
12124 KB |
Output is correct |
| 12 |
Correct |
3 ms |
12136 KB |
Output is correct |
| 13 |
Correct |
3 ms |
12124 KB |
Output is correct |
| 14 |
Correct |
3 ms |
12124 KB |
Output is correct |
| 15 |
Correct |
3 ms |
12124 KB |
Output is correct |
| 16 |
Correct |
3 ms |
12120 KB |
Output is correct |
| 17 |
Correct |
3 ms |
12120 KB |
Output is correct |
| 18 |
Correct |
3 ms |
12124 KB |
Output is correct |
| 19 |
Correct |
3 ms |
12124 KB |
Output is correct |
| 20 |
Correct |
3 ms |
12124 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
3 ms |
12120 KB |
Output is correct |
| 2 |
Correct |
4 ms |
12120 KB |
Output is correct |
| 3 |
Correct |
3 ms |
12124 KB |
Output is correct |
| 4 |
Correct |
3 ms |
12124 KB |
Output is correct |
| 5 |
Correct |
3 ms |
12124 KB |
Output is correct |
| 6 |
Correct |
3 ms |
12124 KB |
Output is correct |
| 7 |
Correct |
5 ms |
12120 KB |
Output is correct |
| 8 |
Correct |
3 ms |
12124 KB |
Output is correct |
| 9 |
Correct |
3 ms |
12124 KB |
Output is correct |
| 10 |
Correct |
3 ms |
12120 KB |
Output is correct |
| 11 |
Correct |
3 ms |
12124 KB |
Output is correct |
| 12 |
Correct |
3 ms |
12136 KB |
Output is correct |
| 13 |
Correct |
3 ms |
12124 KB |
Output is correct |
| 14 |
Correct |
3 ms |
12124 KB |
Output is correct |
| 15 |
Correct |
3 ms |
12124 KB |
Output is correct |
| 16 |
Correct |
3 ms |
12120 KB |
Output is correct |
| 17 |
Correct |
3 ms |
12120 KB |
Output is correct |
| 18 |
Correct |
3 ms |
12124 KB |
Output is correct |
| 19 |
Correct |
3 ms |
12124 KB |
Output is correct |
| 20 |
Correct |
3 ms |
12124 KB |
Output is correct |
| 21 |
Correct |
3 ms |
12124 KB |
Output is correct |
| 22 |
Correct |
4 ms |
12124 KB |
Output is correct |
| 23 |
Correct |
4 ms |
12376 KB |
Output is correct |
| 24 |
Correct |
3 ms |
12120 KB |
Output is correct |
| 25 |
Correct |
4 ms |
12212 KB |
Output is correct |
| 26 |
Correct |
3 ms |
12120 KB |
Output is correct |
| 27 |
Correct |
3 ms |
12124 KB |
Output is correct |
| 28 |
Correct |
4 ms |
12156 KB |
Output is correct |
| 29 |
Correct |
3 ms |
12124 KB |
Output is correct |
| 30 |
Correct |
3 ms |
12124 KB |
Output is correct |
| 31 |
Correct |
3 ms |
12120 KB |
Output is correct |
| 32 |
Correct |
3 ms |
12120 KB |
Output is correct |
| 33 |
Correct |
3 ms |
12124 KB |
Output is correct |
| 34 |
Correct |
3 ms |
12124 KB |
Output is correct |
| 35 |
Correct |
3 ms |
12124 KB |
Output is correct |
| 36 |
Correct |
3 ms |
12120 KB |
Output is correct |
| 37 |
Correct |
4 ms |
12124 KB |
Output is correct |
| 38 |
Correct |
4 ms |
12124 KB |
Output is correct |
| 39 |
Correct |
3 ms |
12124 KB |
Output is correct |
| 40 |
Correct |
3 ms |
12124 KB |
Output is correct |
| 41 |
Correct |
3 ms |
12124 KB |
Output is correct |
| 42 |
Correct |
3 ms |
12124 KB |
Output is correct |
| 43 |
Correct |
4 ms |
12124 KB |
Output is correct |
| 44 |
Correct |
4 ms |
12124 KB |
Output is correct |
| 45 |
Correct |
3 ms |
12120 KB |
Output is correct |
| 46 |
Correct |
3 ms |
12120 KB |
Output is correct |
| 47 |
Correct |
4 ms |
12124 KB |
Output is correct |
| 48 |
Correct |
3 ms |
12124 KB |
Output is correct |
| 49 |
Correct |
3 ms |
12124 KB |
Output is correct |
| 50 |
Correct |
3 ms |
12124 KB |
Output is correct |
| 51 |
Correct |
3 ms |
12376 KB |
Output is correct |
| 52 |
Correct |
4 ms |
12124 KB |
Output is correct |
| 53 |
Correct |
3 ms |
12120 KB |
Output is correct |
| 54 |
Correct |
3 ms |
12120 KB |
Output is correct |
| 55 |
Correct |
3 ms |
12124 KB |
Output is correct |
| 56 |
Correct |
3 ms |
12124 KB |
Output is correct |
| 57 |
Correct |
3 ms |
12124 KB |
Output is correct |
| 58 |
Correct |
3 ms |
12120 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
3 ms |
12120 KB |
Output is correct |
| 2 |
Correct |
4 ms |
12120 KB |
Output is correct |
| 3 |
Correct |
3 ms |
12124 KB |
Output is correct |
| 4 |
Correct |
3 ms |
12124 KB |
Output is correct |
| 5 |
Correct |
3 ms |
12124 KB |
Output is correct |
| 6 |
Correct |
3 ms |
12124 KB |
Output is correct |
| 7 |
Correct |
5 ms |
12120 KB |
Output is correct |
| 8 |
Correct |
3 ms |
12124 KB |
Output is correct |
| 9 |
Correct |
3 ms |
12124 KB |
Output is correct |
| 10 |
Correct |
3 ms |
12120 KB |
Output is correct |
| 11 |
Correct |
3 ms |
12124 KB |
Output is correct |
| 12 |
Correct |
3 ms |
12136 KB |
Output is correct |
| 13 |
Correct |
3 ms |
12124 KB |
Output is correct |
| 14 |
Correct |
3 ms |
12124 KB |
Output is correct |
| 15 |
Correct |
3 ms |
12124 KB |
Output is correct |
| 16 |
Correct |
3 ms |
12120 KB |
Output is correct |
| 17 |
Correct |
3 ms |
12120 KB |
Output is correct |
| 18 |
Correct |
3 ms |
12124 KB |
Output is correct |
| 19 |
Correct |
3 ms |
12124 KB |
Output is correct |
| 20 |
Correct |
3 ms |
12124 KB |
Output is correct |
| 21 |
Correct |
3 ms |
12124 KB |
Output is correct |
| 22 |
Correct |
4 ms |
12124 KB |
Output is correct |
| 23 |
Correct |
4 ms |
12376 KB |
Output is correct |
| 24 |
Correct |
3 ms |
12120 KB |
Output is correct |
| 25 |
Correct |
4 ms |
12212 KB |
Output is correct |
| 26 |
Correct |
3 ms |
12120 KB |
Output is correct |
| 27 |
Correct |
3 ms |
12124 KB |
Output is correct |
| 28 |
Correct |
4 ms |
12156 KB |
Output is correct |
| 29 |
Correct |
3 ms |
12124 KB |
Output is correct |
| 30 |
Correct |
3 ms |
12124 KB |
Output is correct |
| 31 |
Correct |
3 ms |
12120 KB |
Output is correct |
| 32 |
Correct |
3 ms |
12120 KB |
Output is correct |
| 33 |
Correct |
3 ms |
12124 KB |
Output is correct |
| 34 |
Correct |
3 ms |
12124 KB |
Output is correct |
| 35 |
Correct |
3 ms |
12124 KB |
Output is correct |
| 36 |
Correct |
3 ms |
12120 KB |
Output is correct |
| 37 |
Correct |
4 ms |
12124 KB |
Output is correct |
| 38 |
Correct |
4 ms |
12124 KB |
Output is correct |
| 39 |
Correct |
3 ms |
12124 KB |
Output is correct |
| 40 |
Correct |
3 ms |
12124 KB |
Output is correct |
| 41 |
Correct |
3 ms |
12124 KB |
Output is correct |
| 42 |
Correct |
3 ms |
12124 KB |
Output is correct |
| 43 |
Correct |
4 ms |
12124 KB |
Output is correct |
| 44 |
Correct |
4 ms |
12124 KB |
Output is correct |
| 45 |
Correct |
3 ms |
12120 KB |
Output is correct |
| 46 |
Correct |
3 ms |
12120 KB |
Output is correct |
| 47 |
Correct |
4 ms |
12124 KB |
Output is correct |
| 48 |
Correct |
3 ms |
12124 KB |
Output is correct |
| 49 |
Correct |
3 ms |
12124 KB |
Output is correct |
| 50 |
Correct |
3 ms |
12124 KB |
Output is correct |
| 51 |
Correct |
3 ms |
12376 KB |
Output is correct |
| 52 |
Correct |
4 ms |
12124 KB |
Output is correct |
| 53 |
Correct |
3 ms |
12120 KB |
Output is correct |
| 54 |
Correct |
3 ms |
12120 KB |
Output is correct |
| 55 |
Correct |
3 ms |
12124 KB |
Output is correct |
| 56 |
Correct |
3 ms |
12124 KB |
Output is correct |
| 57 |
Correct |
3 ms |
12124 KB |
Output is correct |
| 58 |
Correct |
3 ms |
12120 KB |
Output is correct |
| 59 |
Correct |
215 ms |
40824 KB |
Output is correct |
| 60 |
Correct |
313 ms |
44572 KB |
Output is correct |
| 61 |
Correct |
3 ms |
12124 KB |
Output is correct |
| 62 |
Correct |
5 ms |
12380 KB |
Output is correct |
| 63 |
Correct |
169 ms |
37696 KB |
Output is correct |
| 64 |
Correct |
4 ms |
12380 KB |
Output is correct |
| 65 |
Correct |
9 ms |
14020 KB |
Output is correct |
| 66 |
Correct |
61 ms |
27988 KB |
Output is correct |
| 67 |
Correct |
344 ms |
46916 KB |
Output is correct |
| 68 |
Correct |
311 ms |
48592 KB |
Output is correct |
| 69 |
Correct |
7 ms |
13144 KB |
Output is correct |
| 70 |
Correct |
52 ms |
23340 KB |
Output is correct |
| 71 |
Correct |
172 ms |
46520 KB |
Output is correct |
| 72 |
Correct |
189 ms |
45748 KB |
Output is correct |
| 73 |
Correct |
73 ms |
20168 KB |
Output is correct |
| 74 |
Correct |
261 ms |
41148 KB |
Output is correct |
| 75 |
Correct |
23 ms |
15768 KB |
Output is correct |
| 76 |
Correct |
179 ms |
45476 KB |
Output is correct |
| 77 |
Correct |
198 ms |
45760 KB |
Output is correct |
| 78 |
Correct |
20 ms |
15936 KB |
Output is correct |
| 79 |
Correct |
324 ms |
45332 KB |
Output is correct |
| 80 |
Correct |
4 ms |
12380 KB |
Output is correct |
| 81 |
Correct |
56 ms |
22648 KB |
Output is correct |
| 82 |
Correct |
267 ms |
44020 KB |
Output is correct |
| 83 |
Correct |
310 ms |
41300 KB |
Output is correct |
| 84 |
Correct |
301 ms |
41520 KB |
Output is correct |
| 85 |
Correct |
323 ms |
41192 KB |
Output is correct |
| 86 |
Correct |
253 ms |
44188 KB |
Output is correct |
| 87 |
Correct |
345 ms |
44412 KB |
Output is correct |
