oj.uz

Submission #23206

# Submission time Handle Problem Language Result Execution time Memory
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

# Verdict Execution time Memory 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

Subtask #2
45.0 / 45.0

# Verdict Execution time Memory 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

# Verdict Execution time Memory 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 -