| # |
Submission time |
Handle |
Problem |
Language |
Result |
Execution time |
Memory |
| 553371 |
2022-04-25T15:39:35 Z |
new_acc |
Network (BOI15_net) |
C++14 |
|
673 ms |
63756 KB |
#include<bits/stdc++.h>
#define fi first
#define se second
#define pitem item*
using namespace std;
typedef long long ll;
typedef unsigned long long ull;
typedef vector<int> vi;
typedef vector<ll> vl;
const int N=1e6+10;
const int SS=1<<19;
const int INFi=2e9;
const ll INFl=1e13;
const ll mod2=998244353;
const ll mod=1e9+7;
const ll mod3=1000696969;
const ll p=70032301;
const ull p2=913;
const int L=20;
vi graf[N],l;
void dfs(int v,int o){
for(auto u:graf[v]){
if(u==o) continue;
dfs(u,v);
}
if(graf[v].size()==1) l.push_back(v);
}
void solve(){
int n;
cin>>n;
for(int a,b,i=1;i<n;i++){
cin>>a>>b;
graf[a].push_back(b),graf[b].push_back(a);
}
dfs(1,1);
cout<<((l.size()+1)>>1)<<"\n";
for(int i=0;i<(l.size())>>1;i++) cout<<l[i]<<" "<<l[i+(l.size()>>1)]<<"\n";
if(l.size()&1) cout<<l[l.size()-1]<<" "<<l[l.size()>>1]<<"\n";
}
int main(){
solve();
}
Compilation message
net.cpp: In function 'void solve()':
net.cpp:37:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
37 | for(int i=0;i<(l.size())>>1;i++) cout<<l[i]<<" "<<l[i+(l.size()>>1)]<<"\n";
| ~^~~~~~~~~~~~~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
13 ms |
23764 KB |
Output is correct |
| 2 |
Correct |
12 ms |
23780 KB |
Output is correct |
| 3 |
Correct |
12 ms |
23788 KB |
Output is correct |
| 4 |
Correct |
12 ms |
23780 KB |
Output is correct |
| 5 |
Correct |
15 ms |
23672 KB |
Output is correct |
| 6 |
Correct |
12 ms |
23792 KB |
Output is correct |
| 7 |
Correct |
12 ms |
23792 KB |
Output is correct |
| 8 |
Correct |
11 ms |
23692 KB |
Output is correct |
| 9 |
Correct |
12 ms |
23764 KB |
Output is correct |
| 10 |
Correct |
12 ms |
23736 KB |
Output is correct |
| 11 |
Correct |
13 ms |
23672 KB |
Output is correct |
| 12 |
Correct |
13 ms |
23764 KB |
Output is correct |
| 13 |
Correct |
13 ms |
23764 KB |
Output is correct |
| 14 |
Correct |
15 ms |
23756 KB |
Output is correct |
| 15 |
Correct |
15 ms |
23784 KB |
Output is correct |
| 16 |
Correct |
13 ms |
23788 KB |
Output is correct |
| 17 |
Correct |
12 ms |
23764 KB |
Output is correct |
| 18 |
Correct |
13 ms |
23752 KB |
Output is correct |
| 19 |
Correct |
14 ms |
23872 KB |
Output is correct |
| 20 |
Correct |
12 ms |
23708 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
13 ms |
23764 KB |
Output is correct |
| 2 |
Correct |
12 ms |
23780 KB |
Output is correct |
| 3 |
Correct |
12 ms |
23788 KB |
Output is correct |
| 4 |
Correct |
12 ms |
23780 KB |
Output is correct |
| 5 |
Correct |
15 ms |
23672 KB |
Output is correct |
| 6 |
Correct |
12 ms |
23792 KB |
Output is correct |
| 7 |
Correct |
12 ms |
23792 KB |
Output is correct |
| 8 |
Correct |
11 ms |
23692 KB |
Output is correct |
| 9 |
Correct |
12 ms |
23764 KB |
Output is correct |
| 10 |
Correct |
12 ms |
23736 KB |
Output is correct |
| 11 |
Correct |
13 ms |
23672 KB |
Output is correct |
| 12 |
Correct |
13 ms |
23764 KB |
Output is correct |
| 13 |
Correct |
13 ms |
23764 KB |
Output is correct |
| 14 |
Correct |
15 ms |
23756 KB |
Output is correct |
| 15 |
Correct |
15 ms |
23784 KB |
Output is correct |
| 16 |
Correct |
13 ms |
23788 KB |
Output is correct |
| 17 |
Correct |
12 ms |
23764 KB |
Output is correct |
| 18 |
Correct |
13 ms |
23752 KB |
Output is correct |
| 19 |
Correct |
14 ms |
23872 KB |
Output is correct |
| 20 |
Correct |
12 ms |
23708 KB |
Output is correct |
| 21 |
Correct |
13 ms |
23764 KB |
Output is correct |
| 22 |
Correct |
14 ms |
23804 KB |
Output is correct |
| 23 |
Correct |
17 ms |
23840 KB |
Output is correct |
| 24 |
Correct |
15 ms |
23892 KB |
Output is correct |
| 25 |
Correct |
15 ms |
23764 KB |
Output is correct |
| 26 |
Correct |
14 ms |
23792 KB |
Output is correct |
| 27 |
Correct |
14 ms |
23824 KB |
Output is correct |
| 28 |
Correct |
15 ms |
23892 KB |
Output is correct |
| 29 |
Correct |
25 ms |
23744 KB |
Output is correct |
| 30 |
Correct |
13 ms |
23736 KB |
Output is correct |
| 31 |
Correct |
15 ms |
23764 KB |
Output is correct |
| 32 |
Correct |
13 ms |
23684 KB |
Output is correct |
| 33 |
Correct |
14 ms |
23764 KB |
Output is correct |
| 34 |
Correct |
12 ms |
23760 KB |
Output is correct |
| 35 |
Correct |
12 ms |
23784 KB |
Output is correct |
| 36 |
Correct |
13 ms |
23764 KB |
Output is correct |
| 37 |
Correct |
14 ms |
23784 KB |
Output is correct |
| 38 |
Correct |
14 ms |
23764 KB |
Output is correct |
| 39 |
Correct |
13 ms |
23784 KB |
Output is correct |
| 40 |
Correct |
13 ms |
23736 KB |
Output is correct |
| 41 |
Correct |
12 ms |
23876 KB |
Output is correct |
| 42 |
Correct |
15 ms |
23764 KB |
Output is correct |
| 43 |
Correct |
14 ms |
23764 KB |
Output is correct |
| 44 |
Correct |
13 ms |
23784 KB |
Output is correct |
| 45 |
Correct |
15 ms |
23788 KB |
Output is correct |
| 46 |
Correct |
14 ms |
23780 KB |
Output is correct |
| 47 |
Correct |
13 ms |
23776 KB |
Output is correct |
| 48 |
Correct |
13 ms |
23800 KB |
Output is correct |
| 49 |
Correct |
14 ms |
23800 KB |
Output is correct |
| 50 |
Correct |
13 ms |
23784 KB |
Output is correct |
| 51 |
Correct |
12 ms |
23772 KB |
Output is correct |
| 52 |
Correct |
13 ms |
23764 KB |
Output is correct |
| 53 |
Correct |
14 ms |
23764 KB |
Output is correct |
| 54 |
Correct |
12 ms |
23784 KB |
Output is correct |
| 55 |
Correct |
15 ms |
23688 KB |
Output is correct |
| 56 |
Correct |
13 ms |
23764 KB |
Output is correct |
| 57 |
Correct |
15 ms |
23780 KB |
Output is correct |
| 58 |
Correct |
17 ms |
23892 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
13 ms |
23764 KB |
Output is correct |
| 2 |
Correct |
12 ms |
23780 KB |
Output is correct |
| 3 |
Correct |
12 ms |
23788 KB |
Output is correct |
| 4 |
Correct |
12 ms |
23780 KB |
Output is correct |
| 5 |
Correct |
15 ms |
23672 KB |
Output is correct |
| 6 |
Correct |
12 ms |
23792 KB |
Output is correct |
| 7 |
Correct |
12 ms |
23792 KB |
Output is correct |
| 8 |
Correct |
11 ms |
23692 KB |
Output is correct |
| 9 |
Correct |
12 ms |
23764 KB |
Output is correct |
| 10 |
Correct |
12 ms |
23736 KB |
Output is correct |
| 11 |
Correct |
13 ms |
23672 KB |
Output is correct |
| 12 |
Correct |
13 ms |
23764 KB |
Output is correct |
| 13 |
Correct |
13 ms |
23764 KB |
Output is correct |
| 14 |
Correct |
15 ms |
23756 KB |
Output is correct |
| 15 |
Correct |
15 ms |
23784 KB |
Output is correct |
| 16 |
Correct |
13 ms |
23788 KB |
Output is correct |
| 17 |
Correct |
12 ms |
23764 KB |
Output is correct |
| 18 |
Correct |
13 ms |
23752 KB |
Output is correct |
| 19 |
Correct |
14 ms |
23872 KB |
Output is correct |
| 20 |
Correct |
12 ms |
23708 KB |
Output is correct |
| 21 |
Correct |
13 ms |
23764 KB |
Output is correct |
| 22 |
Correct |
14 ms |
23804 KB |
Output is correct |
| 23 |
Correct |
17 ms |
23840 KB |
Output is correct |
| 24 |
Correct |
15 ms |
23892 KB |
Output is correct |
| 25 |
Correct |
15 ms |
23764 KB |
Output is correct |
| 26 |
Correct |
14 ms |
23792 KB |
Output is correct |
| 27 |
Correct |
14 ms |
23824 KB |
Output is correct |
| 28 |
Correct |
15 ms |
23892 KB |
Output is correct |
| 29 |
Correct |
25 ms |
23744 KB |
Output is correct |
| 30 |
Correct |
13 ms |
23736 KB |
Output is correct |
| 31 |
Correct |
15 ms |
23764 KB |
Output is correct |
| 32 |
Correct |
13 ms |
23684 KB |
Output is correct |
| 33 |
Correct |
14 ms |
23764 KB |
Output is correct |
| 34 |
Correct |
12 ms |
23760 KB |
Output is correct |
| 35 |
Correct |
12 ms |
23784 KB |
Output is correct |
| 36 |
Correct |
13 ms |
23764 KB |
Output is correct |
| 37 |
Correct |
14 ms |
23784 KB |
Output is correct |
| 38 |
Correct |
14 ms |
23764 KB |
Output is correct |
| 39 |
Correct |
13 ms |
23784 KB |
Output is correct |
| 40 |
Correct |
13 ms |
23736 KB |
Output is correct |
| 41 |
Correct |
12 ms |
23876 KB |
Output is correct |
| 42 |
Correct |
15 ms |
23764 KB |
Output is correct |
| 43 |
Correct |
14 ms |
23764 KB |
Output is correct |
| 44 |
Correct |
13 ms |
23784 KB |
Output is correct |
| 45 |
Correct |
15 ms |
23788 KB |
Output is correct |
| 46 |
Correct |
14 ms |
23780 KB |
Output is correct |
| 47 |
Correct |
13 ms |
23776 KB |
Output is correct |
| 48 |
Correct |
13 ms |
23800 KB |
Output is correct |
| 49 |
Correct |
14 ms |
23800 KB |
Output is correct |
| 50 |
Correct |
13 ms |
23784 KB |
Output is correct |
| 51 |
Correct |
12 ms |
23772 KB |
Output is correct |
| 52 |
Correct |
13 ms |
23764 KB |
Output is correct |
| 53 |
Correct |
14 ms |
23764 KB |
Output is correct |
| 54 |
Correct |
12 ms |
23784 KB |
Output is correct |
| 55 |
Correct |
15 ms |
23688 KB |
Output is correct |
| 56 |
Correct |
13 ms |
23764 KB |
Output is correct |
| 57 |
Correct |
15 ms |
23780 KB |
Output is correct |
| 58 |
Correct |
17 ms |
23892 KB |
Output is correct |
| 59 |
Correct |
536 ms |
47752 KB |
Output is correct |
| 60 |
Correct |
615 ms |
50376 KB |
Output is correct |
| 61 |
Correct |
15 ms |
23764 KB |
Output is correct |
| 62 |
Correct |
15 ms |
23672 KB |
Output is correct |
| 63 |
Correct |
431 ms |
45304 KB |
Output is correct |
| 64 |
Correct |
15 ms |
24220 KB |
Output is correct |
| 65 |
Correct |
42 ms |
25876 KB |
Output is correct |
| 66 |
Correct |
260 ms |
42196 KB |
Output is correct |
| 67 |
Correct |
673 ms |
62728 KB |
Output is correct |
| 68 |
Correct |
665 ms |
63756 KB |
Output is correct |
| 69 |
Correct |
23 ms |
24648 KB |
Output is correct |
| 70 |
Correct |
143 ms |
32876 KB |
Output is correct |
| 71 |
Correct |
486 ms |
53608 KB |
Output is correct |
| 72 |
Correct |
471 ms |
52312 KB |
Output is correct |
| 73 |
Correct |
145 ms |
30756 KB |
Output is correct |
| 74 |
Correct |
599 ms |
49300 KB |
Output is correct |
| 75 |
Correct |
54 ms |
26952 KB |
Output is correct |
| 76 |
Correct |
526 ms |
53188 KB |
Output is correct |
| 77 |
Correct |
507 ms |
53460 KB |
Output is correct |
| 78 |
Correct |
69 ms |
27236 KB |
Output is correct |
| 79 |
Correct |
659 ms |
60544 KB |
Output is correct |
| 80 |
Correct |
15 ms |
23892 KB |
Output is correct |
| 81 |
Correct |
215 ms |
32908 KB |
Output is correct |
| 82 |
Correct |
563 ms |
51296 KB |
Output is correct |
| 83 |
Correct |
602 ms |
49480 KB |
Output is correct |
| 84 |
Correct |
607 ms |
49388 KB |
Output is correct |
| 85 |
Correct |
621 ms |
49400 KB |
Output is correct |
| 86 |
Correct |
654 ms |
50428 KB |
Output is correct |
| 87 |
Correct |
612 ms |
50492 KB |
Output is correct |
