#include <fstream>

using namespace std;
ifstream f("scmax.in");
ofstream g("scmax.out");
int i,Max,a[100003],lung[100003],n,j,Maxx;
int main()
{ f>>n;
  for(i=1;i<=n;++i) f>>a[i];
  lung[n]=1;
  for(i=n-1;i>=1;--i)
  { Max=0;
   for(j=i+1;j<=n;++j) if(a[i]<a[j] && Max<lung[j])
        {Max=lung[j];}
  lung[i]=Max+1;if(lung[i]>Maxx) Maxx=lung[i];
  }

  g<<Maxx<<'\n';
  for(i=1;Maxx>0;++i)
   if(lung[i]==Maxx)
  {g<<a[i]<<" ";--Maxx;}

  g<<'\n';



    return 0;
}