# |
Submission time |
Handle |
Problem |
Language |
Result |
Execution time |
Memory |
94399 |
2019-01-18T04:15:47 Z |
gumball |
Network (BOI15_net) |
C++14 |
|
83 ms |
14712 KB |
#include<bits/stdc++.h>
#define ll long long
#define pb push_back
#define mp make_pair
#define fi first
#define se second
using namespace std;
ll n,m,i,ta,tb,D[101010],daun,bes[101010],ROOT,j,P[101010],sudah[101010],sisa,kel[101010],L[101010];
vector<ll> v[101010],C,w[101010],isi[101010];
vector<pair<pair<ll,ll> ,ll> > Z;
void dfs(ll aa,ll bb)
{
//cout<<aa<<" "<<bb<<" "<<cc<<"\n";
bes[aa]=0;
if(D[aa]==1)bes[aa]=1;
ll ii;
for(ii=0;ii<v[aa].size();ii++)
if(v[aa][ii]!=bb)
{
P[v[aa][ii]]=aa;
dfs(v[aa][ii],aa);
bes[aa]+=bes[v[aa][ii]];
}
}
void dfs2(ll aa,ll bb,ll cc,ll dd)
{
L[aa]=dd;
if(D[aa]==1)
{
kel[dd]++;
isi[dd].pb(aa);
Z.pb(mp(mp(cc,dd),aa));
}
ll ii;
for(ii=0;ii<v[aa].size();ii++)
if(v[aa][ii]!=bb)
dfs2(v[aa][ii],aa,cc,dd);
}
int main()
{
//ios_base::sync_with_stdio(NULL);cin.tie(NULL);cout.tie(NULL);
cin>>n;
for(i=1;i<n;i++)
{
cin>>ta>>tb;
v[ta].pb(tb);
v[tb].pb(ta);
D[ta]++;
D[tb]++;
}
for(i=1;i<=n;i++)
if(D[i]>1)
C.pb(i);
else
daun++;
//cout<<daun<<"\n";
for(i=0;i<C.size();i++)
{
vector<ll> X;
ROOT=C[i];
//cout<<ROOT<<"\n";
dfs(ROOT,ROOT);
for(j=0;j<v[ROOT].size();j++)
X.pb(bes[v[ROOT][j]]);
//return 0;
sort(X.begin(),X.end());
reverse(X.begin(),X.end());
if(X[0]*2<=daun)
break;
else
ROOT=-1;
}
if(ROOT==-1)while(1);
//cout<<ROOT<<"\n";
//return 0;
for(i=0;i<v[ROOT].size();i++)
dfs2(v[ROOT][i],ROOT,bes[v[ROOT][i]],i);
cout<<(daun/2+daun%2)<<"\n";
sort(Z.begin(),Z.end());
if(daun%2==1)
{
//while(1);
ll OO=Z[daun-1].fi.se;
if(isi[OO].back()!=ROOT)cout<<isi[OO].back()<<" "<<ROOT<<"\n";
else
{
for(i=1;i<=n;i++)
if(L[i]!=L[isi[OO].back()])
{
cout<<isi[OO].back()<<" "<<i<<"\n";
break;
}
}
daun--;
kel[OO]--;
isi[OO].pop_back();
Z.pop_back();
}
sisa=daun/2;
for(i=0;i<(daun/2);i++)
{
vector<pair<ll,ll> > B;
// cout<<i<<"\n";
for(j=0;j<v[ROOT].size();j++)
B.pb(mp(-kel[j],j));
sort(B.begin(),B.end());
if(B[1].fi==0)while(1);
cout<<isi[B[0].se].back()<<" "<<isi[B[1].se].back()<<"\n";
//if(i==1)return 0;
//return 0;
kel[B[0].se]--;
kel[B[1].se]--;
isi[B[0].se].pop_back();
isi[B[1].se].pop_back();
}
//if(sisa)while(1);
}
Compilation message
net.cpp: In function 'void dfs(long long int, long long int)':
net.cpp:17:13: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
for(ii=0;ii<v[aa].size();ii++)
~~^~~~~~~~~~~~~
net.cpp: In function 'void dfs2(long long int, long long int, long long int, long long int)':
net.cpp:35:13: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
for(ii=0;ii<v[aa].size();ii++)
~~^~~~~~~~~~~~~
net.cpp: In function 'int main()':
net.cpp:57:11: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
for(i=0;i<C.size();i++)
~^~~~~~~~~
net.cpp:63:12: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
for(j=0;j<v[ROOT].size();j++)
~^~~~~~~~~~~~~~~
net.cpp:76:11: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
for(i=0;i<v[ROOT].size();i++)
~^~~~~~~~~~~~~~~
net.cpp:104:12: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
for(j=0;j<v[ROOT].size();j++)
~^~~~~~~~~~~~~~~
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
8 ms |
7416 KB |
Output is correct |
2 |
Correct |
9 ms |
7544 KB |
Output is correct |
3 |
Correct |
8 ms |
7416 KB |
Output is correct |
4 |
Correct |
8 ms |
7416 KB |
Output is correct |
5 |
Correct |
8 ms |
7416 KB |
Output is correct |
6 |
Correct |
8 ms |
7544 KB |
Output is correct |
7 |
Correct |
8 ms |
7416 KB |
Output is correct |
8 |
Correct |
8 ms |
7416 KB |
Output is correct |
9 |
Correct |
8 ms |
7416 KB |
Output is correct |
10 |
Correct |
8 ms |
7544 KB |
Output is correct |
11 |
Correct |
8 ms |
7416 KB |
Output is correct |
12 |
Correct |
8 ms |
7544 KB |
Output is correct |
13 |
Correct |
8 ms |
7416 KB |
Output is correct |
14 |
Correct |
8 ms |
7416 KB |
Output is correct |
15 |
Correct |
8 ms |
7416 KB |
Output is correct |
16 |
Correct |
8 ms |
7544 KB |
Output is correct |
17 |
Correct |
8 ms |
7544 KB |
Output is correct |
18 |
Correct |
8 ms |
7420 KB |
Output is correct |
19 |
Correct |
8 ms |
7416 KB |
Output is correct |
20 |
Correct |
8 ms |
7548 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
8 ms |
7416 KB |
Output is correct |
2 |
Correct |
9 ms |
7544 KB |
Output is correct |
3 |
Correct |
8 ms |
7416 KB |
Output is correct |
4 |
Correct |
8 ms |
7416 KB |
Output is correct |
5 |
Correct |
8 ms |
7416 KB |
Output is correct |
6 |
Correct |
8 ms |
7544 KB |
Output is correct |
7 |
Correct |
8 ms |
7416 KB |
Output is correct |
8 |
Correct |
8 ms |
7416 KB |
Output is correct |
9 |
Correct |
8 ms |
7416 KB |
Output is correct |
10 |
Correct |
8 ms |
7544 KB |
Output is correct |
11 |
Correct |
8 ms |
7416 KB |
Output is correct |
12 |
Correct |
8 ms |
7544 KB |
Output is correct |
13 |
Correct |
8 ms |
7416 KB |
Output is correct |
14 |
Correct |
8 ms |
7416 KB |
Output is correct |
15 |
Correct |
8 ms |
7416 KB |
Output is correct |
16 |
Correct |
8 ms |
7544 KB |
Output is correct |
17 |
Correct |
8 ms |
7544 KB |
Output is correct |
18 |
Correct |
8 ms |
7420 KB |
Output is correct |
19 |
Correct |
8 ms |
7416 KB |
Output is correct |
20 |
Correct |
8 ms |
7548 KB |
Output is correct |
21 |
Correct |
7 ms |
7544 KB |
Output is correct |
22 |
Correct |
48 ms |
7800 KB |
Output is correct |
23 |
Correct |
45 ms |
7804 KB |
Output is correct |
24 |
Correct |
83 ms |
7800 KB |
Output is correct |
25 |
Correct |
34 ms |
7672 KB |
Output is correct |
26 |
Correct |
16 ms |
7672 KB |
Output is correct |
27 |
Correct |
15 ms |
7672 KB |
Output is correct |
28 |
Correct |
22 ms |
7672 KB |
Output is correct |
29 |
Correct |
14 ms |
7672 KB |
Output is correct |
30 |
Correct |
8 ms |
7416 KB |
Output is correct |
31 |
Correct |
22 ms |
7672 KB |
Output is correct |
32 |
Correct |
8 ms |
7416 KB |
Output is correct |
33 |
Correct |
8 ms |
7416 KB |
Output is correct |
34 |
Correct |
8 ms |
7416 KB |
Output is correct |
35 |
Correct |
8 ms |
7416 KB |
Output is correct |
36 |
Correct |
8 ms |
7416 KB |
Output is correct |
37 |
Correct |
9 ms |
7544 KB |
Output is correct |
38 |
Correct |
14 ms |
7544 KB |
Output is correct |
39 |
Correct |
8 ms |
7544 KB |
Output is correct |
40 |
Correct |
8 ms |
7544 KB |
Output is correct |
41 |
Correct |
8 ms |
7416 KB |
Output is correct |
42 |
Correct |
13 ms |
7544 KB |
Output is correct |
43 |
Correct |
26 ms |
7672 KB |
Output is correct |
44 |
Correct |
8 ms |
7520 KB |
Output is correct |
45 |
Correct |
9 ms |
7544 KB |
Output is correct |
46 |
Correct |
11 ms |
7544 KB |
Output is correct |
47 |
Correct |
7 ms |
7544 KB |
Output is correct |
48 |
Correct |
9 ms |
7544 KB |
Output is correct |
49 |
Correct |
17 ms |
7544 KB |
Output is correct |
50 |
Correct |
8 ms |
7416 KB |
Output is correct |
51 |
Correct |
8 ms |
7548 KB |
Output is correct |
52 |
Correct |
9 ms |
7544 KB |
Output is correct |
53 |
Correct |
16 ms |
7800 KB |
Output is correct |
54 |
Correct |
8 ms |
7544 KB |
Output is correct |
55 |
Correct |
9 ms |
7544 KB |
Output is correct |
56 |
Correct |
8 ms |
7420 KB |
Output is correct |
57 |
Correct |
11 ms |
7544 KB |
Output is correct |
58 |
Correct |
9 ms |
7800 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
8 ms |
7416 KB |
Output is correct |
2 |
Correct |
9 ms |
7544 KB |
Output is correct |
3 |
Correct |
8 ms |
7416 KB |
Output is correct |
4 |
Correct |
8 ms |
7416 KB |
Output is correct |
5 |
Correct |
8 ms |
7416 KB |
Output is correct |
6 |
Correct |
8 ms |
7544 KB |
Output is correct |
7 |
Correct |
8 ms |
7416 KB |
Output is correct |
8 |
Correct |
8 ms |
7416 KB |
Output is correct |
9 |
Correct |
8 ms |
7416 KB |
Output is correct |
10 |
Correct |
8 ms |
7544 KB |
Output is correct |
11 |
Correct |
8 ms |
7416 KB |
Output is correct |
12 |
Correct |
8 ms |
7544 KB |
Output is correct |
13 |
Correct |
8 ms |
7416 KB |
Output is correct |
14 |
Correct |
8 ms |
7416 KB |
Output is correct |
15 |
Correct |
8 ms |
7416 KB |
Output is correct |
16 |
Correct |
8 ms |
7544 KB |
Output is correct |
17 |
Correct |
8 ms |
7544 KB |
Output is correct |
18 |
Correct |
8 ms |
7420 KB |
Output is correct |
19 |
Correct |
8 ms |
7416 KB |
Output is correct |
20 |
Correct |
8 ms |
7548 KB |
Output is correct |
21 |
Correct |
7 ms |
7544 KB |
Output is correct |
22 |
Correct |
48 ms |
7800 KB |
Output is correct |
23 |
Correct |
45 ms |
7804 KB |
Output is correct |
24 |
Correct |
83 ms |
7800 KB |
Output is correct |
25 |
Correct |
34 ms |
7672 KB |
Output is correct |
26 |
Correct |
16 ms |
7672 KB |
Output is correct |
27 |
Correct |
15 ms |
7672 KB |
Output is correct |
28 |
Correct |
22 ms |
7672 KB |
Output is correct |
29 |
Correct |
14 ms |
7672 KB |
Output is correct |
30 |
Correct |
8 ms |
7416 KB |
Output is correct |
31 |
Correct |
22 ms |
7672 KB |
Output is correct |
32 |
Correct |
8 ms |
7416 KB |
Output is correct |
33 |
Correct |
8 ms |
7416 KB |
Output is correct |
34 |
Correct |
8 ms |
7416 KB |
Output is correct |
35 |
Correct |
8 ms |
7416 KB |
Output is correct |
36 |
Correct |
8 ms |
7416 KB |
Output is correct |
37 |
Correct |
9 ms |
7544 KB |
Output is correct |
38 |
Correct |
14 ms |
7544 KB |
Output is correct |
39 |
Correct |
8 ms |
7544 KB |
Output is correct |
40 |
Correct |
8 ms |
7544 KB |
Output is correct |
41 |
Correct |
8 ms |
7416 KB |
Output is correct |
42 |
Correct |
13 ms |
7544 KB |
Output is correct |
43 |
Correct |
26 ms |
7672 KB |
Output is correct |
44 |
Correct |
8 ms |
7520 KB |
Output is correct |
45 |
Correct |
9 ms |
7544 KB |
Output is correct |
46 |
Correct |
11 ms |
7544 KB |
Output is correct |
47 |
Correct |
7 ms |
7544 KB |
Output is correct |
48 |
Correct |
9 ms |
7544 KB |
Output is correct |
49 |
Correct |
17 ms |
7544 KB |
Output is correct |
50 |
Correct |
8 ms |
7416 KB |
Output is correct |
51 |
Correct |
8 ms |
7548 KB |
Output is correct |
52 |
Correct |
9 ms |
7544 KB |
Output is correct |
53 |
Correct |
16 ms |
7800 KB |
Output is correct |
54 |
Correct |
8 ms |
7544 KB |
Output is correct |
55 |
Correct |
9 ms |
7544 KB |
Output is correct |
56 |
Correct |
8 ms |
7420 KB |
Output is correct |
57 |
Correct |
11 ms |
7544 KB |
Output is correct |
58 |
Correct |
9 ms |
7800 KB |
Output is correct |
59 |
Runtime error |
16 ms |
14712 KB |
Execution killed with signal 11 (could be triggered by violating memory limits) |
60 |
Halted |
0 ms |
0 KB |
- |