답안 #656037

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
656037	2022-11-06T08:57:24 Z	Mohammad_Parsa	Network (BOI15_net)	C++14	100 / 100	601 ms	41544 KB

/* in the name of allah */
#include<bits/stdc++.h>
using namespace std;

#define ll long long
#define pb push_back
#define F first
#define S second
#define mk make_pair

const int N=5e5+7;

vector<int>vec[N],barg;

void dfs(int v,int p){
	if(vec[v].size()==1) barg.pb(v);
	for(auto u:vec[v]){
		if(u!=p) dfs(u,v);
	}
}


int main(){
	ios:: sync_with_stdio(0),cin.tie(0),cout.tie(0);
	int n;
	cin>>n;
	int u,v;
	for(int i=0;i<n-1;i++){
		cin>>u>>v;
		vec[v].pb(u);
		vec[u].pb(v);
	}
	if(n==2){
		cout<<1<<endl<<1<<" "<<2;
		return 0;
	}
	for(int i=1;i<=n;i++){
		if(vec[i].size()!=1){
			dfs(i,i);
			break;
		}
	}
	int x=barg.size()/2+(barg.size()%2);
	cout<<x<<endl;
	for(int i=0;i<x;i++){
		cout<<barg[i]<<" "<<barg[(i+x)%barg.size()]<<endl;
	}
	
}

Subtask #1
18.0 / 18.0

#	결과	실행 시간	메모리	Grader output
1	Correct	7 ms	11988 KB	Output is correct
2	Correct	8 ms	12068 KB	Output is correct
3	Correct	7 ms	11988 KB	Output is correct
4	Correct	9 ms	11988 KB	Output is correct
5	Correct	7 ms	12060 KB	Output is correct
6	Correct	7 ms	12068 KB	Output is correct
7	Correct	6 ms	12064 KB	Output is correct
8	Correct	6 ms	11988 KB	Output is correct
9	Correct	8 ms	12068 KB	Output is correct
10	Correct	6 ms	12064 KB	Output is correct
11	Correct	7 ms	12056 KB	Output is correct
12	Correct	8 ms	11988 KB	Output is correct
13	Correct	7 ms	12060 KB	Output is correct
14	Correct	6 ms	12032 KB	Output is correct
15	Correct	6 ms	12064 KB	Output is correct
16	Correct	7 ms	12064 KB	Output is correct
17	Correct	7 ms	11988 KB	Output is correct
18	Correct	7 ms	11988 KB	Output is correct
19	Correct	7 ms	11988 KB	Output is correct
20	Correct	7 ms	12064 KB	Output is correct

Subtask #2
45.0 / 45.0

#	결과	실행 시간	메모리	Grader output
1	Correct	7 ms	11988 KB	Output is correct
2	Correct	8 ms	12068 KB	Output is correct
3	Correct	7 ms	11988 KB	Output is correct
4	Correct	9 ms	11988 KB	Output is correct
5	Correct	7 ms	12060 KB	Output is correct
6	Correct	7 ms	12068 KB	Output is correct
7	Correct	6 ms	12064 KB	Output is correct
8	Correct	6 ms	11988 KB	Output is correct
9	Correct	8 ms	12068 KB	Output is correct
10	Correct	6 ms	12064 KB	Output is correct
11	Correct	7 ms	12056 KB	Output is correct
12	Correct	8 ms	11988 KB	Output is correct
13	Correct	7 ms	12060 KB	Output is correct
14	Correct	6 ms	12032 KB	Output is correct
15	Correct	6 ms	12064 KB	Output is correct
16	Correct	7 ms	12064 KB	Output is correct
17	Correct	7 ms	11988 KB	Output is correct
18	Correct	7 ms	11988 KB	Output is correct
19	Correct	7 ms	11988 KB	Output is correct
20	Correct	7 ms	12064 KB	Output is correct
21	Correct	6 ms	11988 KB	Output is correct
22	Correct	8 ms	12068 KB	Output is correct
23	Correct	8 ms	12052 KB	Output is correct
24	Correct	8 ms	12116 KB	Output is correct
25	Correct	8 ms	12116 KB	Output is correct
26	Correct	7 ms	12116 KB	Output is correct
27	Correct	8 ms	12200 KB	Output is correct
28	Correct	9 ms	12116 KB	Output is correct
29	Correct	8 ms	12116 KB	Output is correct
30	Correct	6 ms	12064 KB	Output is correct
31	Correct	8 ms	12116 KB	Output is correct
32	Correct	7 ms	11988 KB	Output is correct
33	Correct	6 ms	12032 KB	Output is correct
34	Correct	7 ms	12060 KB	Output is correct
35	Correct	8 ms	11988 KB	Output is correct
36	Correct	7 ms	12060 KB	Output is correct
37	Correct	9 ms	11988 KB	Output is correct
38	Correct	9 ms	12116 KB	Output is correct
39	Correct	7 ms	12060 KB	Output is correct
40	Correct	7 ms	12068 KB	Output is correct
41	Correct	6 ms	11988 KB	Output is correct
42	Correct	7 ms	11988 KB	Output is correct
43	Correct	9 ms	11988 KB	Output is correct
44	Correct	9 ms	11988 KB	Output is correct
45	Correct	7 ms	12064 KB	Output is correct
46	Correct	7 ms	11988 KB	Output is correct
47	Correct	6 ms	11988 KB	Output is correct
48	Correct	8 ms	11992 KB	Output is correct
49	Correct	8 ms	12072 KB	Output is correct
50	Correct	7 ms	12060 KB	Output is correct
51	Correct	7 ms	11988 KB	Output is correct
52	Correct	7 ms	11988 KB	Output is correct
53	Correct	7 ms	12068 KB	Output is correct
54	Correct	6 ms	12060 KB	Output is correct
55	Correct	8 ms	12064 KB	Output is correct
56	Correct	7 ms	11988 KB	Output is correct
57	Correct	7 ms	11988 KB	Output is correct
58	Correct	8 ms	12076 KB	Output is correct

Subtask #3
37.0 / 37.0

#	결과	실행 시간	메모리	Grader output
1	Correct	7 ms	11988 KB	Output is correct
2	Correct	8 ms	12068 KB	Output is correct
3	Correct	7 ms	11988 KB	Output is correct
4	Correct	9 ms	11988 KB	Output is correct
5	Correct	7 ms	12060 KB	Output is correct
6	Correct	7 ms	12068 KB	Output is correct
7	Correct	6 ms	12064 KB	Output is correct
8	Correct	6 ms	11988 KB	Output is correct
9	Correct	8 ms	12068 KB	Output is correct
10	Correct	6 ms	12064 KB	Output is correct
11	Correct	7 ms	12056 KB	Output is correct
12	Correct	8 ms	11988 KB	Output is correct
13	Correct	7 ms	12060 KB	Output is correct
14	Correct	6 ms	12032 KB	Output is correct
15	Correct	6 ms	12064 KB	Output is correct
16	Correct	7 ms	12064 KB	Output is correct
17	Correct	7 ms	11988 KB	Output is correct
18	Correct	7 ms	11988 KB	Output is correct
19	Correct	7 ms	11988 KB	Output is correct
20	Correct	7 ms	12064 KB	Output is correct
21	Correct	6 ms	11988 KB	Output is correct
22	Correct	8 ms	12068 KB	Output is correct
23	Correct	8 ms	12052 KB	Output is correct
24	Correct	8 ms	12116 KB	Output is correct
25	Correct	8 ms	12116 KB	Output is correct
26	Correct	7 ms	12116 KB	Output is correct
27	Correct	8 ms	12200 KB	Output is correct
28	Correct	9 ms	12116 KB	Output is correct
29	Correct	8 ms	12116 KB	Output is correct
30	Correct	6 ms	12064 KB	Output is correct
31	Correct	8 ms	12116 KB	Output is correct
32	Correct	7 ms	11988 KB	Output is correct
33	Correct	6 ms	12032 KB	Output is correct
34	Correct	7 ms	12060 KB	Output is correct
35	Correct	8 ms	11988 KB	Output is correct
36	Correct	7 ms	12060 KB	Output is correct
37	Correct	9 ms	11988 KB	Output is correct
38	Correct	9 ms	12116 KB	Output is correct
39	Correct	7 ms	12060 KB	Output is correct
40	Correct	7 ms	12068 KB	Output is correct
41	Correct	6 ms	11988 KB	Output is correct
42	Correct	7 ms	11988 KB	Output is correct
43	Correct	9 ms	11988 KB	Output is correct
44	Correct	9 ms	11988 KB	Output is correct
45	Correct	7 ms	12064 KB	Output is correct
46	Correct	7 ms	11988 KB	Output is correct
47	Correct	6 ms	11988 KB	Output is correct
48	Correct	8 ms	11992 KB	Output is correct
49	Correct	8 ms	12072 KB	Output is correct
50	Correct	7 ms	12060 KB	Output is correct
51	Correct	7 ms	11988 KB	Output is correct
52	Correct	7 ms	11988 KB	Output is correct
53	Correct	7 ms	12068 KB	Output is correct
54	Correct	6 ms	12060 KB	Output is correct
55	Correct	8 ms	12064 KB	Output is correct
56	Correct	7 ms	11988 KB	Output is correct
57	Correct	7 ms	11988 KB	Output is correct
58	Correct	8 ms	12076 KB	Output is correct
59	Correct	466 ms	30580 KB	Output is correct
60	Correct	520 ms	32636 KB	Output is correct
61	Correct	9 ms	12064 KB	Output is correct
62	Correct	7 ms	11992 KB	Output is correct
63	Correct	442 ms	28756 KB	Output is correct
64	Correct	8 ms	12372 KB	Output is correct
65	Correct	19 ms	13896 KB	Output is correct
66	Correct	108 ms	25900 KB	Output is correct
67	Correct	416 ms	40796 KB	Output is correct
68	Correct	447 ms	41544 KB	Output is correct
69	Correct	21 ms	12884 KB	Output is correct
70	Correct	151 ms	19608 KB	Output is correct
71	Correct	569 ms	35860 KB	Output is correct
72	Correct	505 ms	35112 KB	Output is correct
73	Correct	103 ms	17732 KB	Output is correct
74	Correct	537 ms	31792 KB	Output is correct
75	Correct	69 ms	14924 KB	Output is correct
76	Correct	503 ms	35656 KB	Output is correct
77	Correct	557 ms	35932 KB	Output is correct
78	Correct	43 ms	15228 KB	Output is correct
79	Correct	428 ms	39300 KB	Output is correct
80	Correct	10 ms	12244 KB	Output is correct
81	Correct	200 ms	19704 KB	Output is correct
82	Correct	521 ms	33828 KB	Output is correct
83	Correct	531 ms	31848 KB	Output is correct
84	Correct	583 ms	31784 KB	Output is correct
85	Correct	569 ms	31740 KB	Output is correct
86	Correct	597 ms	32844 KB	Output is correct
87	Correct	601 ms	32832 KB	Output is correct

답안 #656037

Compilation message

Subtask #1 18.0 / 18.0

Subtask #2 45.0 / 45.0

Subtask #3 37.0 / 37.0

Subtask #1
18.0 / 18.0

Subtask #2
45.0 / 45.0

Subtask #3
37.0 / 37.0