# | Submission time | Handle | Problem | Language | Result | Execution time | Memory |
---|---|---|---|---|---|---|---|
939078 | 2024-03-06T05:24:00 Z | ezzzay | Network (BOI15_net) | C++14 | 650 ms | 58084 KB |
#include<bits/stdc++.h> using namespace std; #define int long long #define ff first #define ss second #define pb push_back const int N=5e5+5; bool vis[N]; vector<int>v[N]; vector<pair<int,int>>rts; vector<int>vec; void dfs(int a, int p=-1){ if(v[a].size()==1)vec.pb(a); for(auto b:v[a]){ if(b!=p){ dfs(b,a); } } } signed main(){ int n; cin>>n; for(int i=1;i<n;i++){ int a,b; cin>>a>>b; v[a].pb(b); v[b].pb(a); rts.pb({a,b}); } dfs(1); cout<<vec.size()/2+vec.size()%2<<endl; for(int i=0;i<(vec.size()+1)/2;i++){ cout<<vec[i]<<" "<<vec[i+vec.size()/2]<<endl; } }
Compilation message
# | Verdict | Execution time | Memory | Grader output |
---|---|---|---|---|
1 | Correct | 4 ms | 12120 KB | Output is correct |
2 | Correct | 3 ms | 12124 KB | Output is correct |
3 | Correct | 3 ms | 12120 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 | 3 ms | 12124 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 | 12124 KB | Output is correct |
11 | Correct | 3 ms | 12124 KB | Output is correct |
12 | Correct | 3 ms | 12124 KB | Output is correct |
13 | Correct | 3 ms | 12124 KB | Output is correct |
14 | Correct | 3 ms | 12120 KB | Output is correct |
15 | Correct | 3 ms | 12124 KB | Output is correct |
16 | Correct | 3 ms | 12124 KB | Output is correct |
17 | Correct | 3 ms | 12124 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 | 4 ms | 12120 KB | Output is correct |
2 | Correct | 3 ms | 12124 KB | Output is correct |
3 | Correct | 3 ms | 12120 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 | 3 ms | 12124 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 | 12124 KB | Output is correct |
11 | Correct | 3 ms | 12124 KB | Output is correct |
12 | Correct | 3 ms | 12124 KB | Output is correct |
13 | Correct | 3 ms | 12124 KB | Output is correct |
14 | Correct | 3 ms | 12120 KB | Output is correct |
15 | Correct | 3 ms | 12124 KB | Output is correct |
16 | Correct | 3 ms | 12124 KB | Output is correct |
17 | Correct | 3 ms | 12124 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 | 12120 KB | Output is correct |
22 | Correct | 5 ms | 12124 KB | Output is correct |
23 | Correct | 5 ms | 12124 KB | Output is correct |
24 | Correct | 5 ms | 12332 KB | Output is correct |
25 | Correct | 5 ms | 12124 KB | Output is correct |
26 | Correct | 4 ms | 12120 KB | Output is correct |
27 | Correct | 5 ms | 12124 KB | Output is correct |
28 | Correct | 4 ms | 12260 KB | Output is correct |
29 | Correct | 4 ms | 12120 KB | Output is correct |
30 | Correct | 3 ms | 12120 KB | Output is correct |
31 | Correct | 5 ms | 12124 KB | Output is correct |
32 | Correct | 3 ms | 12124 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 | 3 ms | 12124 KB | Output is correct |
38 | Correct | 3 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 | 3 ms | 12136 KB | Output is correct |
45 | Correct | 3 ms | 12124 KB | Output is correct |
46 | Correct | 3 ms | 12124 KB | Output is correct |
47 | Correct | 3 ms | 12124 KB | Output is correct |
48 | Correct | 3 ms | 12140 KB | Output is correct |
49 | Correct | 5 ms | 12124 KB | Output is correct |
50 | Correct | 3 ms | 12124 KB | Output is correct |
51 | Correct | 3 ms | 12124 KB | Output is correct |
52 | Correct | 3 ms | 12124 KB | Output is correct |
53 | Correct | 5 ms | 12124 KB | Output is correct |
54 | Correct | 3 ms | 12124 KB | Output is correct |
55 | Correct | 3 ms | 12124 KB | Output is correct |
56 | Correct | 3 ms | 12124 KB | Output is correct |
57 | Correct | 4 ms | 12124 KB | Output is correct |
58 | Correct | 5 ms | 12124 KB | Output is correct |
# | Verdict | Execution time | Memory | Grader output |
---|---|---|---|---|
1 | Correct | 4 ms | 12120 KB | Output is correct |
2 | Correct | 3 ms | 12124 KB | Output is correct |
3 | Correct | 3 ms | 12120 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 | 3 ms | 12124 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 | 12124 KB | Output is correct |
11 | Correct | 3 ms | 12124 KB | Output is correct |
12 | Correct | 3 ms | 12124 KB | Output is correct |
13 | Correct | 3 ms | 12124 KB | Output is correct |
14 | Correct | 3 ms | 12120 KB | Output is correct |
15 | Correct | 3 ms | 12124 KB | Output is correct |
16 | Correct | 3 ms | 12124 KB | Output is correct |
17 | Correct | 3 ms | 12124 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 | 12120 KB | Output is correct |
22 | Correct | 5 ms | 12124 KB | Output is correct |
23 | Correct | 5 ms | 12124 KB | Output is correct |
24 | Correct | 5 ms | 12332 KB | Output is correct |
25 | Correct | 5 ms | 12124 KB | Output is correct |
26 | Correct | 4 ms | 12120 KB | Output is correct |
27 | Correct | 5 ms | 12124 KB | Output is correct |
28 | Correct | 4 ms | 12260 KB | Output is correct |
29 | Correct | 4 ms | 12120 KB | Output is correct |
30 | Correct | 3 ms | 12120 KB | Output is correct |
31 | Correct | 5 ms | 12124 KB | Output is correct |
32 | Correct | 3 ms | 12124 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 | 3 ms | 12124 KB | Output is correct |
38 | Correct | 3 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 | 3 ms | 12136 KB | Output is correct |
45 | Correct | 3 ms | 12124 KB | Output is correct |
46 | Correct | 3 ms | 12124 KB | Output is correct |
47 | Correct | 3 ms | 12124 KB | Output is correct |
48 | Correct | 3 ms | 12140 KB | Output is correct |
49 | Correct | 5 ms | 12124 KB | Output is correct |
50 | Correct | 3 ms | 12124 KB | Output is correct |
51 | Correct | 3 ms | 12124 KB | Output is correct |
52 | Correct | 3 ms | 12124 KB | Output is correct |
53 | Correct | 5 ms | 12124 KB | Output is correct |
54 | Correct | 3 ms | 12124 KB | Output is correct |
55 | Correct | 3 ms | 12124 KB | Output is correct |
56 | Correct | 3 ms | 12124 KB | Output is correct |
57 | Correct | 4 ms | 12124 KB | Output is correct |
58 | Correct | 5 ms | 12124 KB | Output is correct |
59 | Correct | 559 ms | 54028 KB | Output is correct |
60 | Correct | 650 ms | 55272 KB | Output is correct |
61 | Correct | 3 ms | 12124 KB | Output is correct |
62 | Correct | 3 ms | 12180 KB | Output is correct |
63 | Correct | 461 ms | 47064 KB | Output is correct |
64 | Correct | 5 ms | 12832 KB | Output is correct |
65 | Correct | 16 ms | 14408 KB | Output is correct |
66 | Correct | 117 ms | 30744 KB | Output is correct |
67 | Correct | 506 ms | 54956 KB | Output is correct |
68 | Correct | 500 ms | 56840 KB | Output is correct |
69 | Correct | 21 ms | 13272 KB | Output is correct |
70 | Correct | 192 ms | 27784 KB | Output is correct |
71 | Correct | 598 ms | 58084 KB | Output is correct |
72 | Correct | 609 ms | 56592 KB | Output is correct |
73 | Correct | 142 ms | 24052 KB | Output is correct |
74 | Correct | 580 ms | 50824 KB | Output is correct |
75 | Correct | 60 ms | 16952 KB | Output is correct |
76 | Correct | 620 ms | 57196 KB | Output is correct |
77 | Correct | 635 ms | 57488 KB | Output is correct |
78 | Correct | 44 ms | 16576 KB | Output is correct |
79 | Correct | 465 ms | 53064 KB | Output is correct |
80 | Correct | 7 ms | 12376 KB | Output is correct |
81 | Correct | 181 ms | 26948 KB | Output is correct |
82 | Correct | 608 ms | 56244 KB | Output is correct |
83 | Correct | 571 ms | 50900 KB | Output is correct |
84 | Correct | 591 ms | 51244 KB | Output is correct |
85 | Correct | 557 ms | 51068 KB | Output is correct |
86 | Correct | 593 ms | 55212 KB | Output is correct |
87 | Correct | 579 ms | 56516 KB | Output is correct |