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#include<fstream>
#include<iostream>
using namespace std;
#define MAX 100001
ifstream fin("sir.in");
int a[MAX],l[MAX],poz[MAX];
int n,m,prim;
void citire()
{
int i;
fin>>n;
for(i=1;i<=n;i++)
fin>>a[i];
}
void subsir()
{
int i,j;
for(i=n;i>=1;i--)
{
l[i]=1;poz[i]=0;
for(j=i+1;j<=n;j++)
if(a[i]<a[j] && l[i]<1+l[j])
{
l[i]=1+l[j];
poz[i]=j;
}
if(m<l[i])
{
m=l[i];prim=i;
}
}
}
void tipar()
{
int i;
cout<<m<<endl;
for(i=prim;i>0;i=poz[i])
cout<<a[i]<<' ';
}
int main()
{
citire();
subsir();
tipar();
fin.close();
return 0;
}