#include<fstream>
 #include<iostream>
 using namespace std;
 #define MAX 100001
 ifstream fin("scmax.in");
 ofstream g("scmax.out");
 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;
g<<m<<endl;
for(i=prim;i>0;i=poz[i])
g<<a[i]<<' ';
}
int main()
{
citire();
subsir();
tipar();
g.close();
fin.close();
return 0;
}