#include <bits/stdc++.h>
using namespace std;
vector<int>g[100000],sz(100000),vmin(100000),vmax(100000),temp,temp1,temp2(100000);
int n;
long long int resmax=0,resmin=0;
void dfsmax(int a,int b,int c)
{
if(c==0)
{
temp.push_back(a);
}
else if(c==2)
{
temp1.push_back(a);
}
for(auto i:g[a])
{
if(i!=b&&c==1)
{
dfsmax(i,a,c);
resmax+=(2*min(sz[i],n-sz[i]));
}
else if(i!=b)
{
dfsmax(i,a,c);
}
}
}
void dfsmin(int a,int b)
{
vector<int>t;
for(auto i:g[a])
{
if(i!=b)
{
dfsmin(i,a);
if(temp2[i]!=0)
{
t.push_back(temp2[i]-1);
}
}
}
resmin+=(2*t.size());
t.push_back(a);
reverse(t.begin(),t.end());
for(int i=1;i<t.size();i+=2)
{
vmin[t[i]]=t[i-1];
vmin[t[i-1]]=t[i];
}
if(t.size()%2==1)
{
temp2[a]=t[t.size()-1]+1;
}
}
void dfs(int a,int b)
{
sz[a]=1;
for(auto i:g[a])
{
if(i!=b)
{
dfs(i,a);
sz[a]+=sz[i];
}
}
}
int findcen(int a)
{
int b=a;
while(true)
{
bool check=true;
for(auto i:g[a])
{
if(i!=b&&sz[i]*2>n)
{
b=a;
a=i;
check=false;
break;
}
}
if(check)
{
break;
}
}
return a;
}
int main()
{
ios_base::sync_with_stdio(false);
cin.tie(0);
int a,b;
cin>>n;
for(int i=0;i<n;i++)
{
vmax[i]=i;
vmin[i]=i;
}
for(int i=0;i<n-1;i++)
{
cin>>a>>b;
a--;b--;
g[a].push_back(b);
g[b].push_back(a);
}
dfs(0,0);
int cen=findcen(0);
dfs(cen,cen);
a=-1;b=-1;
dfsmin(cen,cen);
dfsmax(cen,cen,1);
if(n%2==1)
{
resmin-=2;
}
cout<<resmin<<" "<<resmax<<"\n";
for(int i=0;i<n;i++)
{
cout<<vmin[i]+1<<" ";
}
cout<<"\n";
for(auto i:g[cen])
{
if(sz[i]>b)
{
b=sz[i];
a=i;
}
}
dfsmax(a,cen,0);
for(auto i:g[cen])
{
if(i!=a)
{
dfsmax(i,cen,2);
}
}
if(temp.size()>temp1.size())temp1.push_back(cen);
else{temp.push_back(cen);}
for(int i=0;i<min(temp.size(),temp1.size());i++)
{
vmax[temp1[i]]=temp[i];
vmax[temp[i]]=temp1[i];
}
for(int i=0;i<n;i++)
{
cout<<vmax[i]+1<<" ";
}
return 0;
}
Compilation message
Village.cpp: In function 'void dfsmin(int, int)':
Village.cpp:47:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
47 | for(int i=1;i<t.size();i+=2)
| ~^~~~~~~~~
Village.cpp: In function 'int main()':
Village.cpp:144:18: warning: comparison of integer expressions of different signedness: 'int' and 'const long unsigned int' [-Wsign-compare]
144 | for(int i=0;i<min(temp.size(),temp1.size());i++)
| ~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
2 ms |
4188 KB |
Output is correct |
| 2 |
Incorrect |
2 ms |
4188 KB |
Output isn't correct |
| 3 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
2 ms |
4188 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
2 ms |
4188 KB |
Output is correct |
| 2 |
Incorrect |
2 ms |
4188 KB |
Output isn't correct |
| 3 |
Halted |
0 ms |
0 KB |
- |
