답안 #23206 :: oj.uz

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
23206	2017-05-04T13:42:49 Z	iletavcioski	Network (BOI15_net)	C++14	63 / 100	433 ms	30936 KB

#include<iostream>
#include<vector>
using namespace std;
vector<vector<int> > v;
int brojac=0;
vector<int> toc;
void dfs(int x,int prev)
{
	
	for(int i=0;i<v[x].size();i++)
		if(v[x][i]!=prev)
		dfs(v[x][i],x);
	if(v[x].size()==1)
		toc.push_back(x);
}
int main()
{
	ios_base::sync_with_stdio(false);
	int n;
	cin>>n;
	vector<int> vec;
	v.insert(v.begin(),n+1,vec);
	if(n==1)
	{
		cout<<0<<endl;
		return 0;
	}
	for(int i=0;i<n-1;i++)
	{
		int a,b;
		cin>>a>>b;
		a--;
		b--;
		v[a].push_back(b);
		v[b].push_back(a);
	}
	brojac=0;
	for(int i=0;i<n;i++)
	{
		if(v[i].size()>1){
			dfs(i,-1);
		break;}
	}
	cout<<(int)(toc.size()+1)/2<<endl;
	for(int i=0;i<(toc.size()+1)/2;i++)
	{
		cout<<toc[i]+1<<" "<<toc[i+(toc.size())/2]+1<<endl;
	}
	return 0;
}

Compilation message

net.cpp: In function 'void dfs(int, int)':
net.cpp:10:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i=0;i<v[x].size();i++)
               ^
net.cpp: In function 'int main()':
net.cpp:45:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i=0;i<(toc.size()+1)/2;i++)
               ^

Subtask #1
18.0 / 18.0

#	결과	메모리	Grader output
1	Correct	2184 KB	Output is correct
2	Correct	2184 KB	Output is correct
3	Correct	2184 KB	Output is correct
4	Correct	2184 KB	Output is correct
5	Correct	2184 KB	Output is correct
6	Correct	2184 KB	Output is correct
7	Correct	2184 KB	Output is correct
8	Correct	2184 KB	Output is correct
9	Correct	2184 KB	Output is correct
10	Correct	2184 KB	Output is correct
11	Correct	2184 KB	Output is correct
12	Correct	2184 KB	Output is correct
13	Correct	2184 KB	Output is correct
14	Correct	2184 KB	Output is correct
15	Correct	2184 KB	Output is correct
16	Correct	2184 KB	Output is correct
17	Correct	2184 KB	Output is correct
18	Correct	2184 KB	Output is correct
19	Correct	2184 KB	Output is correct
20	Correct	2184 KB	Output is correct

Subtask #2
45.0 / 45.0

#	결과	실행 시간	메모리	Grader output
1	Correct	0 ms	2184 KB	Output is correct
2	Correct	0 ms	2184 KB	Output is correct
3	Correct	0 ms	2184 KB	Output is correct
4	Correct	0 ms	2184 KB	Output is correct
5	Correct	0 ms	2184 KB	Output is correct
6	Correct	0 ms	2184 KB	Output is correct
7	Correct	0 ms	2184 KB	Output is correct
8	Correct	0 ms	2184 KB	Output is correct
9	Correct	0 ms	2184 KB	Output is correct
10	Correct	0 ms	2184 KB	Output is correct
11	Correct	0 ms	2184 KB	Output is correct
12	Correct	0 ms	2184 KB	Output is correct
13	Correct	0 ms	2184 KB	Output is correct
14	Correct	0 ms	2184 KB	Output is correct
15	Correct	0 ms	2184 KB	Output is correct
16	Correct	0 ms	2184 KB	Output is correct
17	Correct	0 ms	2184 KB	Output is correct
18	Correct	0 ms	2184 KB	Output is correct
19	Correct	0 ms	2184 KB	Output is correct
20	Correct	0 ms	2184 KB	Output is correct
21	Correct	0 ms	2184 KB	Output is correct
22	Correct	0 ms	2316 KB	Output is correct
23	Correct	0 ms	2316 KB	Output is correct
24	Correct	0 ms	2316 KB	Output is correct
25	Correct	3 ms	2316 KB	Output is correct
26	Correct	6 ms	2184 KB	Output is correct
27	Correct	0 ms	2316 KB	Output is correct
28	Correct	3 ms	2316 KB	Output is correct
29	Correct	3 ms	2184 KB	Output is correct
30	Correct	0 ms	2184 KB	Output is correct
31	Correct	3 ms	2316 KB	Output is correct
32	Correct	0 ms	2184 KB	Output is correct
33	Correct	0 ms	2184 KB	Output is correct
34	Correct	0 ms	2184 KB	Output is correct
35	Correct	0 ms	2184 KB	Output is correct
36	Correct	0 ms	2184 KB	Output is correct
37	Correct	0 ms	2184 KB	Output is correct
38	Correct	0 ms	2184 KB	Output is correct
39	Correct	0 ms	2184 KB	Output is correct
40	Correct	0 ms	2184 KB	Output is correct
41	Correct	0 ms	2184 KB	Output is correct
42	Correct	0 ms	2184 KB	Output is correct
43	Correct	0 ms	2184 KB	Output is correct
44	Correct	0 ms	2184 KB	Output is correct
45	Correct	0 ms	2184 KB	Output is correct
46	Correct	0 ms	2184 KB	Output is correct
47	Correct	0 ms	2184 KB	Output is correct
48	Correct	0 ms	2184 KB	Output is correct
49	Correct	0 ms	2184 KB	Output is correct
50	Correct	0 ms	2184 KB	Output is correct
51	Correct	0 ms	2184 KB	Output is correct
52	Correct	0 ms	2184 KB	Output is correct
53	Correct	0 ms	2184 KB	Output is correct
54	Correct	0 ms	2184 KB	Output is correct
55	Correct	0 ms	2184 KB	Output is correct
56	Correct	0 ms	2184 KB	Output is correct
57	Correct	3 ms	2184 KB	Output is correct
58	Correct	3 ms	2316 KB	Output is correct

Subtask #3
0 / 37.0

#	결과	실행 시간	메모리	Grader output
1	Correct	0 ms	2184 KB	Output is correct
2	Correct	0 ms	2184 KB	Output is correct
3	Correct	0 ms	2184 KB	Output is correct
4	Correct	0 ms	2184 KB	Output is correct
5	Correct	0 ms	2184 KB	Output is correct
6	Correct	0 ms	2184 KB	Output is correct
7	Correct	0 ms	2184 KB	Output is correct
8	Correct	0 ms	2184 KB	Output is correct
9	Correct	0 ms	2184 KB	Output is correct
10	Correct	0 ms	2184 KB	Output is correct
11	Correct	0 ms	2184 KB	Output is correct
12	Correct	0 ms	2184 KB	Output is correct
13	Correct	0 ms	2184 KB	Output is correct
14	Correct	0 ms	2184 KB	Output is correct
15	Correct	0 ms	2184 KB	Output is correct
16	Correct	0 ms	2184 KB	Output is correct
17	Correct	0 ms	2184 KB	Output is correct
18	Correct	0 ms	2184 KB	Output is correct
19	Correct	0 ms	2184 KB	Output is correct
20	Correct	0 ms	2184 KB	Output is correct
21	Correct	0 ms	2184 KB	Output is correct
22	Correct	0 ms	2316 KB	Output is correct
23	Correct	0 ms	2316 KB	Output is correct
24	Correct	0 ms	2316 KB	Output is correct
25	Correct	3 ms	2316 KB	Output is correct
26	Correct	6 ms	2184 KB	Output is correct
27	Correct	0 ms	2316 KB	Output is correct
28	Correct	3 ms	2316 KB	Output is correct
29	Correct	3 ms	2184 KB	Output is correct
30	Correct	0 ms	2184 KB	Output is correct
31	Correct	3 ms	2316 KB	Output is correct
32	Correct	0 ms	2184 KB	Output is correct
33	Correct	0 ms	2184 KB	Output is correct
34	Correct	0 ms	2184 KB	Output is correct
35	Correct	0 ms	2184 KB	Output is correct
36	Correct	0 ms	2184 KB	Output is correct
37	Correct	0 ms	2184 KB	Output is correct
38	Correct	0 ms	2184 KB	Output is correct
39	Correct	0 ms	2184 KB	Output is correct
40	Correct	0 ms	2184 KB	Output is correct
41	Correct	0 ms	2184 KB	Output is correct
42	Correct	0 ms	2184 KB	Output is correct
43	Correct	0 ms	2184 KB	Output is correct
44	Correct	0 ms	2184 KB	Output is correct
45	Correct	0 ms	2184 KB	Output is correct
46	Correct	0 ms	2184 KB	Output is correct
47	Correct	0 ms	2184 KB	Output is correct
48	Correct	0 ms	2184 KB	Output is correct
49	Correct	0 ms	2184 KB	Output is correct
50	Correct	0 ms	2184 KB	Output is correct
51	Correct	0 ms	2184 KB	Output is correct
52	Correct	0 ms	2184 KB	Output is correct
53	Correct	0 ms	2184 KB	Output is correct
54	Correct	0 ms	2184 KB	Output is correct
55	Correct	0 ms	2184 KB	Output is correct
56	Correct	0 ms	2184 KB	Output is correct
57	Correct	3 ms	2184 KB	Output is correct
58	Correct	3 ms	2316 KB	Output is correct
59	Runtime error	433 ms	30936 KB	Execution timed out (wall clock limit exceeded)
60	Halted	0 ms	0 KB	-

답안 #23206

Compilation message

Subtask #1 18.0 / 18.0

Subtask #2 45.0 / 45.0

Subtask #3 0 / 37.0

Subtask #1
18.0 / 18.0

Subtask #2
45.0 / 45.0

Subtask #3
0 / 37.0