| # |
Submission time |
Handle |
Problem |
Language |
Result |
Execution time |
Memory |
| 709619 |
2023-03-14T03:01:58 Z |
ToroTN |
Network (BOI15_net) |
C++14 |
|
639 ms |
54052 KB |
#include<bits/stdc++.h>
using namespace std;
#define pb push_back
#define X first
#define Y second
int n,a,b,id[500005],root,num,a1,b1,a2,b2;
vector<int> v[500005],leaf;
vector<pair<int,int> > ans;
void dfs(int u,int p)
{
for(auto node:v[u])
{
if(node==p)continue;
dfs(node,u);
}
if(v[u].size()==1)leaf.pb(u);
}
int main()
{
cin>> n;
for(int i=1;i<n;i++)
{
cin >> a >> b;
++id[a],++id[b];
v[a].pb(b);
v[b].pb(a);
}
for(int i=1;i<=n;i++)
{
if(id[i]>1)
{
root=i;
break;
}
}
for(auto node:v[root])
{
num=node;
dfs(node,root);
}
if(leaf.size()%2==0)
{
for(int i=0;i<leaf.size()/2;i++)
{
ans.pb({leaf[i],leaf[i+leaf.size()/2]});
}
}else
{
for(int i=0;i<leaf.size()/2;i++)
{
ans.pb({leaf[i],leaf[i+leaf.size()/2+1]});
}
ans.pb({leaf[leaf.size()/2],root});
}
printf("%d\n",ans.size());
for(auto [x,y]:ans)
{
printf("%d %d\n",x,y);
}
}
Compilation message
net.cpp: In function 'int main()':
net.cpp:43:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
43 | for(int i=0;i<leaf.size()/2;i++)
| ~^~~~~~~~~~~~~~
net.cpp:49:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
49 | for(int i=0;i<leaf.size()/2;i++)
| ~^~~~~~~~~~~~~~
net.cpp:55:14: warning: format '%d' expects argument of type 'int', but argument 2 has type 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wformat=]
55 | printf("%d\n",ans.size());
| ~^ ~~~~~~~~~~
| | |
| int std::vector<std::pair<int, int> >::size_type {aka long unsigned int}
| %ld
net.cpp:56:14: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
56 | for(auto [x,y]:ans)
| ^
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
6 ms |
11988 KB |
Output is correct |
| 2 |
Correct |
6 ms |
11988 KB |
Output is correct |
| 3 |
Correct |
7 ms |
11988 KB |
Output is correct |
| 4 |
Correct |
6 ms |
12116 KB |
Output is correct |
| 5 |
Correct |
7 ms |
11976 KB |
Output is correct |
| 6 |
Correct |
7 ms |
11988 KB |
Output is correct |
| 7 |
Correct |
7 ms |
11988 KB |
Output is correct |
| 8 |
Correct |
6 ms |
11988 KB |
Output is correct |
| 9 |
Correct |
7 ms |
12048 KB |
Output is correct |
| 10 |
Correct |
7 ms |
12048 KB |
Output is correct |
| 11 |
Correct |
6 ms |
12052 KB |
Output is correct |
| 12 |
Correct |
6 ms |
12060 KB |
Output is correct |
| 13 |
Correct |
7 ms |
11988 KB |
Output is correct |
| 14 |
Correct |
6 ms |
11988 KB |
Output is correct |
| 15 |
Correct |
7 ms |
11988 KB |
Output is correct |
| 16 |
Correct |
8 ms |
12052 KB |
Output is correct |
| 17 |
Correct |
9 ms |
11988 KB |
Output is correct |
| 18 |
Correct |
7 ms |
12052 KB |
Output is correct |
| 19 |
Correct |
6 ms |
11988 KB |
Output is correct |
| 20 |
Correct |
6 ms |
12052 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
6 ms |
11988 KB |
Output is correct |
| 2 |
Correct |
6 ms |
11988 KB |
Output is correct |
| 3 |
Correct |
7 ms |
11988 KB |
Output is correct |
| 4 |
Correct |
6 ms |
12116 KB |
Output is correct |
| 5 |
Correct |
7 ms |
11976 KB |
Output is correct |
| 6 |
Correct |
7 ms |
11988 KB |
Output is correct |
| 7 |
Correct |
7 ms |
11988 KB |
Output is correct |
| 8 |
Correct |
6 ms |
11988 KB |
Output is correct |
| 9 |
Correct |
7 ms |
12048 KB |
Output is correct |
| 10 |
Correct |
7 ms |
12048 KB |
Output is correct |
| 11 |
Correct |
6 ms |
12052 KB |
Output is correct |
| 12 |
Correct |
6 ms |
12060 KB |
Output is correct |
| 13 |
Correct |
7 ms |
11988 KB |
Output is correct |
| 14 |
Correct |
6 ms |
11988 KB |
Output is correct |
| 15 |
Correct |
7 ms |
11988 KB |
Output is correct |
| 16 |
Correct |
8 ms |
12052 KB |
Output is correct |
| 17 |
Correct |
9 ms |
11988 KB |
Output is correct |
| 18 |
Correct |
7 ms |
12052 KB |
Output is correct |
| 19 |
Correct |
6 ms |
11988 KB |
Output is correct |
| 20 |
Correct |
6 ms |
12052 KB |
Output is correct |
| 21 |
Correct |
7 ms |
11988 KB |
Output is correct |
| 22 |
Correct |
8 ms |
12060 KB |
Output is correct |
| 23 |
Correct |
8 ms |
12116 KB |
Output is correct |
| 24 |
Correct |
9 ms |
12068 KB |
Output is correct |
| 25 |
Correct |
8 ms |
12116 KB |
Output is correct |
| 26 |
Correct |
9 ms |
12064 KB |
Output is correct |
| 27 |
Correct |
10 ms |
12060 KB |
Output is correct |
| 28 |
Correct |
8 ms |
12116 KB |
Output is correct |
| 29 |
Correct |
8 ms |
12116 KB |
Output is correct |
| 30 |
Correct |
7 ms |
12052 KB |
Output is correct |
| 31 |
Correct |
7 ms |
12068 KB |
Output is correct |
| 32 |
Correct |
7 ms |
11988 KB |
Output is correct |
| 33 |
Correct |
7 ms |
12052 KB |
Output is correct |
| 34 |
Correct |
8 ms |
11988 KB |
Output is correct |
| 35 |
Correct |
7 ms |
11944 KB |
Output is correct |
| 36 |
Correct |
7 ms |
11988 KB |
Output is correct |
| 37 |
Correct |
7 ms |
11988 KB |
Output is correct |
| 38 |
Correct |
7 ms |
12116 KB |
Output is correct |
| 39 |
Correct |
6 ms |
11988 KB |
Output is correct |
| 40 |
Correct |
7 ms |
11976 KB |
Output is correct |
| 41 |
Correct |
6 ms |
12056 KB |
Output is correct |
| 42 |
Correct |
6 ms |
11988 KB |
Output is correct |
| 43 |
Correct |
8 ms |
12024 KB |
Output is correct |
| 44 |
Correct |
6 ms |
11988 KB |
Output is correct |
| 45 |
Correct |
7 ms |
11988 KB |
Output is correct |
| 46 |
Correct |
7 ms |
11988 KB |
Output is correct |
| 47 |
Correct |
7 ms |
11988 KB |
Output is correct |
| 48 |
Correct |
7 ms |
11988 KB |
Output is correct |
| 49 |
Correct |
7 ms |
12116 KB |
Output is correct |
| 50 |
Correct |
7 ms |
11988 KB |
Output is correct |
| 51 |
Correct |
7 ms |
12052 KB |
Output is correct |
| 52 |
Correct |
7 ms |
11988 KB |
Output is correct |
| 53 |
Correct |
7 ms |
11988 KB |
Output is correct |
| 54 |
Correct |
8 ms |
11988 KB |
Output is correct |
| 55 |
Correct |
8 ms |
11988 KB |
Output is correct |
| 56 |
Correct |
8 ms |
12000 KB |
Output is correct |
| 57 |
Correct |
7 ms |
12052 KB |
Output is correct |
| 58 |
Correct |
8 ms |
12116 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
6 ms |
11988 KB |
Output is correct |
| 2 |
Correct |
6 ms |
11988 KB |
Output is correct |
| 3 |
Correct |
7 ms |
11988 KB |
Output is correct |
| 4 |
Correct |
6 ms |
12116 KB |
Output is correct |
| 5 |
Correct |
7 ms |
11976 KB |
Output is correct |
| 6 |
Correct |
7 ms |
11988 KB |
Output is correct |
| 7 |
Correct |
7 ms |
11988 KB |
Output is correct |
| 8 |
Correct |
6 ms |
11988 KB |
Output is correct |
| 9 |
Correct |
7 ms |
12048 KB |
Output is correct |
| 10 |
Correct |
7 ms |
12048 KB |
Output is correct |
| 11 |
Correct |
6 ms |
12052 KB |
Output is correct |
| 12 |
Correct |
6 ms |
12060 KB |
Output is correct |
| 13 |
Correct |
7 ms |
11988 KB |
Output is correct |
| 14 |
Correct |
6 ms |
11988 KB |
Output is correct |
| 15 |
Correct |
7 ms |
11988 KB |
Output is correct |
| 16 |
Correct |
8 ms |
12052 KB |
Output is correct |
| 17 |
Correct |
9 ms |
11988 KB |
Output is correct |
| 18 |
Correct |
7 ms |
12052 KB |
Output is correct |
| 19 |
Correct |
6 ms |
11988 KB |
Output is correct |
| 20 |
Correct |
6 ms |
12052 KB |
Output is correct |
| 21 |
Correct |
7 ms |
11988 KB |
Output is correct |
| 22 |
Correct |
8 ms |
12060 KB |
Output is correct |
| 23 |
Correct |
8 ms |
12116 KB |
Output is correct |
| 24 |
Correct |
9 ms |
12068 KB |
Output is correct |
| 25 |
Correct |
8 ms |
12116 KB |
Output is correct |
| 26 |
Correct |
9 ms |
12064 KB |
Output is correct |
| 27 |
Correct |
10 ms |
12060 KB |
Output is correct |
| 28 |
Correct |
8 ms |
12116 KB |
Output is correct |
| 29 |
Correct |
8 ms |
12116 KB |
Output is correct |
| 30 |
Correct |
7 ms |
12052 KB |
Output is correct |
| 31 |
Correct |
7 ms |
12068 KB |
Output is correct |
| 32 |
Correct |
7 ms |
11988 KB |
Output is correct |
| 33 |
Correct |
7 ms |
12052 KB |
Output is correct |
| 34 |
Correct |
8 ms |
11988 KB |
Output is correct |
| 35 |
Correct |
7 ms |
11944 KB |
Output is correct |
| 36 |
Correct |
7 ms |
11988 KB |
Output is correct |
| 37 |
Correct |
7 ms |
11988 KB |
Output is correct |
| 38 |
Correct |
7 ms |
12116 KB |
Output is correct |
| 39 |
Correct |
6 ms |
11988 KB |
Output is correct |
| 40 |
Correct |
7 ms |
11976 KB |
Output is correct |
| 41 |
Correct |
6 ms |
12056 KB |
Output is correct |
| 42 |
Correct |
6 ms |
11988 KB |
Output is correct |
| 43 |
Correct |
8 ms |
12024 KB |
Output is correct |
| 44 |
Correct |
6 ms |
11988 KB |
Output is correct |
| 45 |
Correct |
7 ms |
11988 KB |
Output is correct |
| 46 |
Correct |
7 ms |
11988 KB |
Output is correct |
| 47 |
Correct |
7 ms |
11988 KB |
Output is correct |
| 48 |
Correct |
7 ms |
11988 KB |
Output is correct |
| 49 |
Correct |
7 ms |
12116 KB |
Output is correct |
| 50 |
Correct |
7 ms |
11988 KB |
Output is correct |
| 51 |
Correct |
7 ms |
12052 KB |
Output is correct |
| 52 |
Correct |
7 ms |
11988 KB |
Output is correct |
| 53 |
Correct |
7 ms |
11988 KB |
Output is correct |
| 54 |
Correct |
8 ms |
11988 KB |
Output is correct |
| 55 |
Correct |
8 ms |
11988 KB |
Output is correct |
| 56 |
Correct |
8 ms |
12000 KB |
Output is correct |
| 57 |
Correct |
7 ms |
12052 KB |
Output is correct |
| 58 |
Correct |
8 ms |
12116 KB |
Output is correct |
| 59 |
Correct |
511 ms |
39024 KB |
Output is correct |
| 60 |
Correct |
604 ms |
41936 KB |
Output is correct |
| 61 |
Correct |
7 ms |
11988 KB |
Output is correct |
| 62 |
Correct |
7 ms |
11988 KB |
Output is correct |
| 63 |
Correct |
446 ms |
36232 KB |
Output is correct |
| 64 |
Correct |
10 ms |
12500 KB |
Output is correct |
| 65 |
Correct |
25 ms |
14292 KB |
Output is correct |
| 66 |
Correct |
205 ms |
31212 KB |
Output is correct |
| 67 |
Correct |
626 ms |
53048 KB |
Output is correct |
| 68 |
Correct |
639 ms |
54052 KB |
Output is correct |
| 69 |
Correct |
17 ms |
13012 KB |
Output is correct |
| 70 |
Correct |
141 ms |
22396 KB |
Output is correct |
| 71 |
Correct |
472 ms |
45708 KB |
Output is correct |
| 72 |
Correct |
469 ms |
44332 KB |
Output is correct |
| 73 |
Correct |
139 ms |
19908 KB |
Output is correct |
| 74 |
Correct |
613 ms |
40652 KB |
Output is correct |
| 75 |
Correct |
51 ms |
15552 KB |
Output is correct |
| 76 |
Correct |
499 ms |
45408 KB |
Output is correct |
| 77 |
Correct |
456 ms |
45604 KB |
Output is correct |
| 78 |
Correct |
45 ms |
16084 KB |
Output is correct |
| 79 |
Correct |
634 ms |
50728 KB |
Output is correct |
| 80 |
Correct |
10 ms |
12308 KB |
Output is correct |
| 81 |
Correct |
162 ms |
22440 KB |
Output is correct |
| 82 |
Correct |
565 ms |
42936 KB |
Output is correct |
| 83 |
Correct |
564 ms |
40528 KB |
Output is correct |
| 84 |
Correct |
572 ms |
40540 KB |
Output is correct |
| 85 |
Correct |
610 ms |
40512 KB |
Output is correct |
| 86 |
Correct |
552 ms |
41976 KB |
Output is correct |
| 87 |
Correct |
580 ms |
42136 KB |
Output is correct |
