# | 제출 시각 | 아이디 | 문제 | 언어 | 결과 | 실행 시간 | 메모리 |
---|---|---|---|---|---|---|---|
994590 | 2024-06-08T02:05:07 Z | guagua0407 | Network (BOI15_net) | C++17 | 373 ms | 47396 KB |
//#pragma GCC optimize("O3") #include <bits/stdc++.h> using namespace std; #define ll long long #define pii pair<int,int> #define f first #define s second #define all(x) x.begin(),x.end() #define _ ios::sync_with_stdio(0); cin.tie(0); cout.tie(0); int dx[4]={0,0,1,-1}; int dy[4]={1,-1,0,0}; void setIO(string s) { freopen((s + ".in").c_str(), "r", stdin); freopen((s + ".out").c_str(), "w", stdout); } const int mxn=5e5+5; vector<int> adj[mxn]; int deg[mxn]; vector<int> vec; void dfs(int v,int p=-1){ for(auto u:adj[v]){ if(u==p) continue; deg[v]++; deg[u]++; dfs(u,v); } if(deg[v]==1) vec.push_back(v); } int main() {_ int n; cin>>n; for(int i=0;i<n-1;i++){ int a,b; cin>>a>>b; adj[a].push_back(b); adj[b].push_back(a); } dfs(1); int ans=((int)vec.size()+1)/2; cout<<ans<<'\n'; for(int i=0;i<ans;i++){ cout<<vec[i]<<' '<<vec[(i+(int)vec.size()/2)]<<'\n'; } return 0; } //maybe its multiset not set //yeeorz //laborz
Compilation message
# | 결과 | 실행 시간 | 메모리 | Grader output |
---|---|---|---|---|
1 | Correct | 3 ms | 13916 KB | Output is correct |
2 | Correct | 4 ms | 13916 KB | Output is correct |
3 | Correct | 3 ms | 13916 KB | Output is correct |
4 | Correct | 3 ms | 13916 KB | Output is correct |
5 | Correct | 3 ms | 13916 KB | Output is correct |
6 | Correct | 3 ms | 13916 KB | Output is correct |
7 | Correct | 4 ms | 13912 KB | Output is correct |
8 | Correct | 5 ms | 13916 KB | Output is correct |
9 | Correct | 3 ms | 13916 KB | Output is correct |
10 | Correct | 3 ms | 13912 KB | Output is correct |
11 | Correct | 3 ms | 13916 KB | Output is correct |
12 | Correct | 3 ms | 13916 KB | Output is correct |
13 | Correct | 4 ms | 13872 KB | Output is correct |
14 | Correct | 3 ms | 13912 KB | Output is correct |
15 | Correct | 3 ms | 13916 KB | Output is correct |
16 | Correct | 3 ms | 13916 KB | Output is correct |
17 | Correct | 4 ms | 13916 KB | Output is correct |
18 | Correct | 4 ms | 13912 KB | Output is correct |
19 | Correct | 3 ms | 13916 KB | Output is correct |
20 | Correct | 2 ms | 13916 KB | Output is correct |
# | 결과 | 실행 시간 | 메모리 | Grader output |
---|---|---|---|---|
1 | Correct | 3 ms | 13916 KB | Output is correct |
2 | Correct | 4 ms | 13916 KB | Output is correct |
3 | Correct | 3 ms | 13916 KB | Output is correct |
4 | Correct | 3 ms | 13916 KB | Output is correct |
5 | Correct | 3 ms | 13916 KB | Output is correct |
6 | Correct | 3 ms | 13916 KB | Output is correct |
7 | Correct | 4 ms | 13912 KB | Output is correct |
8 | Correct | 5 ms | 13916 KB | Output is correct |
9 | Correct | 3 ms | 13916 KB | Output is correct |
10 | Correct | 3 ms | 13912 KB | Output is correct |
11 | Correct | 3 ms | 13916 KB | Output is correct |
12 | Correct | 3 ms | 13916 KB | Output is correct |
13 | Correct | 4 ms | 13872 KB | Output is correct |
14 | Correct | 3 ms | 13912 KB | Output is correct |
15 | Correct | 3 ms | 13916 KB | Output is correct |
16 | Correct | 3 ms | 13916 KB | Output is correct |
17 | Correct | 4 ms | 13916 KB | Output is correct |
18 | Correct | 4 ms | 13912 KB | Output is correct |
19 | Correct | 3 ms | 13916 KB | Output is correct |
20 | Correct | 2 ms | 13916 KB | Output is correct |
21 | Correct | 4 ms | 13912 KB | Output is correct |
22 | Correct | 3 ms | 13916 KB | Output is correct |
23 | Correct | 3 ms | 13912 KB | Output is correct |
24 | Correct | 3 ms | 13916 KB | Output is correct |
25 | Correct | 4 ms | 13912 KB | Output is correct |
26 | Correct | 4 ms | 13916 KB | Output is correct |
27 | Correct | 4 ms | 13912 KB | Output is correct |
28 | Correct | 4 ms | 13912 KB | Output is correct |
29 | Correct | 4 ms | 14016 KB | Output is correct |
30 | Correct | 3 ms | 13912 KB | Output is correct |
31 | Correct | 5 ms | 13916 KB | Output is correct |
32 | Correct | 3 ms | 13916 KB | Output is correct |
33 | Correct | 3 ms | 13972 KB | Output is correct |
34 | Correct | 3 ms | 13916 KB | Output is correct |
35 | Correct | 3 ms | 13916 KB | Output is correct |
36 | Correct | 3 ms | 13916 KB | Output is correct |
37 | Correct | 4 ms | 13916 KB | Output is correct |
38 | Correct | 4 ms | 13912 KB | Output is correct |
39 | Correct | 4 ms | 13916 KB | Output is correct |
40 | Correct | 3 ms | 13912 KB | Output is correct |
41 | Correct | 4 ms | 13752 KB | Output is correct |
42 | Correct | 3 ms | 13916 KB | Output is correct |
43 | Correct | 3 ms | 13916 KB | Output is correct |
44 | Correct | 3 ms | 13912 KB | Output is correct |
45 | Correct | 5 ms | 13912 KB | Output is correct |
46 | Correct | 3 ms | 13912 KB | Output is correct |
47 | Correct | 2 ms | 13916 KB | Output is correct |
48 | Correct | 3 ms | 13916 KB | Output is correct |
49 | Correct | 3 ms | 13912 KB | Output is correct |
50 | Correct | 3 ms | 13916 KB | Output is correct |
51 | Correct | 3 ms | 13916 KB | Output is correct |
52 | Correct | 3 ms | 13912 KB | Output is correct |
53 | Correct | 3 ms | 13916 KB | Output is correct |
54 | Correct | 3 ms | 13916 KB | Output is correct |
55 | Correct | 3 ms | 13916 KB | Output is correct |
56 | Correct | 5 ms | 13916 KB | Output is correct |
57 | Correct | 5 ms | 13916 KB | Output is correct |
58 | Correct | 4 ms | 13916 KB | Output is correct |
# | 결과 | 실행 시간 | 메모리 | Grader output |
---|---|---|---|---|
1 | Correct | 3 ms | 13916 KB | Output is correct |
2 | Correct | 4 ms | 13916 KB | Output is correct |
3 | Correct | 3 ms | 13916 KB | Output is correct |
4 | Correct | 3 ms | 13916 KB | Output is correct |
5 | Correct | 3 ms | 13916 KB | Output is correct |
6 | Correct | 3 ms | 13916 KB | Output is correct |
7 | Correct | 4 ms | 13912 KB | Output is correct |
8 | Correct | 5 ms | 13916 KB | Output is correct |
9 | Correct | 3 ms | 13916 KB | Output is correct |
10 | Correct | 3 ms | 13912 KB | Output is correct |
11 | Correct | 3 ms | 13916 KB | Output is correct |
12 | Correct | 3 ms | 13916 KB | Output is correct |
13 | Correct | 4 ms | 13872 KB | Output is correct |
14 | Correct | 3 ms | 13912 KB | Output is correct |
15 | Correct | 3 ms | 13916 KB | Output is correct |
16 | Correct | 3 ms | 13916 KB | Output is correct |
17 | Correct | 4 ms | 13916 KB | Output is correct |
18 | Correct | 4 ms | 13912 KB | Output is correct |
19 | Correct | 3 ms | 13916 KB | Output is correct |
20 | Correct | 2 ms | 13916 KB | Output is correct |
21 | Correct | 4 ms | 13912 KB | Output is correct |
22 | Correct | 3 ms | 13916 KB | Output is correct |
23 | Correct | 3 ms | 13912 KB | Output is correct |
24 | Correct | 3 ms | 13916 KB | Output is correct |
25 | Correct | 4 ms | 13912 KB | Output is correct |
26 | Correct | 4 ms | 13916 KB | Output is correct |
27 | Correct | 4 ms | 13912 KB | Output is correct |
28 | Correct | 4 ms | 13912 KB | Output is correct |
29 | Correct | 4 ms | 14016 KB | Output is correct |
30 | Correct | 3 ms | 13912 KB | Output is correct |
31 | Correct | 5 ms | 13916 KB | Output is correct |
32 | Correct | 3 ms | 13916 KB | Output is correct |
33 | Correct | 3 ms | 13972 KB | Output is correct |
34 | Correct | 3 ms | 13916 KB | Output is correct |
35 | Correct | 3 ms | 13916 KB | Output is correct |
36 | Correct | 3 ms | 13916 KB | Output is correct |
37 | Correct | 4 ms | 13916 KB | Output is correct |
38 | Correct | 4 ms | 13912 KB | Output is correct |
39 | Correct | 4 ms | 13916 KB | Output is correct |
40 | Correct | 3 ms | 13912 KB | Output is correct |
41 | Correct | 4 ms | 13752 KB | Output is correct |
42 | Correct | 3 ms | 13916 KB | Output is correct |
43 | Correct | 3 ms | 13916 KB | Output is correct |
44 | Correct | 3 ms | 13912 KB | Output is correct |
45 | Correct | 5 ms | 13912 KB | Output is correct |
46 | Correct | 3 ms | 13912 KB | Output is correct |
47 | Correct | 2 ms | 13916 KB | Output is correct |
48 | Correct | 3 ms | 13916 KB | Output is correct |
49 | Correct | 3 ms | 13912 KB | Output is correct |
50 | Correct | 3 ms | 13916 KB | Output is correct |
51 | Correct | 3 ms | 13916 KB | Output is correct |
52 | Correct | 3 ms | 13912 KB | Output is correct |
53 | Correct | 3 ms | 13916 KB | Output is correct |
54 | Correct | 3 ms | 13916 KB | Output is correct |
55 | Correct | 3 ms | 13916 KB | Output is correct |
56 | Correct | 5 ms | 13916 KB | Output is correct |
57 | Correct | 5 ms | 13916 KB | Output is correct |
58 | Correct | 4 ms | 13916 KB | Output is correct |
59 | Correct | 247 ms | 32060 KB | Output is correct |
60 | Correct | 229 ms | 34212 KB | Output is correct |
61 | Correct | 4 ms | 13916 KB | Output is correct |
62 | Correct | 4 ms | 13912 KB | Output is correct |
63 | Correct | 204 ms | 30196 KB | Output is correct |
64 | Correct | 4 ms | 14428 KB | Output is correct |
65 | Correct | 9 ms | 15832 KB | Output is correct |
66 | Correct | 94 ms | 30288 KB | Output is correct |
67 | Correct | 373 ms | 46420 KB | Output is correct |
68 | Correct | 322 ms | 47396 KB | Output is correct |
69 | Correct | 7 ms | 14680 KB | Output is correct |
70 | Correct | 57 ms | 21236 KB | Output is correct |
71 | Correct | 221 ms | 37060 KB | Output is correct |
72 | Correct | 208 ms | 36448 KB | Output is correct |
73 | Correct | 61 ms | 19488 KB | Output is correct |
74 | Correct | 326 ms | 32952 KB | Output is correct |
75 | Correct | 18 ms | 16600 KB | Output is correct |
76 | Correct | 209 ms | 36784 KB | Output is correct |
77 | Correct | 253 ms | 37248 KB | Output is correct |
78 | Correct | 25 ms | 16980 KB | Output is correct |
79 | Correct | 309 ms | 44076 KB | Output is correct |
80 | Correct | 5 ms | 14168 KB | Output is correct |
81 | Correct | 85 ms | 21320 KB | Output is correct |
82 | Correct | 261 ms | 35016 KB | Output is correct |
83 | Correct | 236 ms | 32964 KB | Output is correct |
84 | Correct | 293 ms | 32960 KB | Output is correct |
85 | Correct | 327 ms | 32964 KB | Output is correct |
86 | Correct | 254 ms | 34208 KB | Output is correct |
87 | Correct | 300 ms | 34172 KB | Output is correct |