#include<fstream.h>
ifstream f("scmax.in");
ofstream g("scmax.out");
int v[100001],l[100001],d[100001],max,n,p;
int main()
{ int i,j;
  f>>n;
  for(i=1;i<=n;i++) f>>v[i];
  l[n]=1;
  for(i=n-1;i>0;i--)
	  {l[i]=1;
	   for(j=i+1;j<=n;j++)
		   if(v[i]<=v[j]&&l[i]<=l[j])
			   {l[i]=l[j]+1;
			    d[i]=j;
			   }
	  if(l[i]>=max) max=l[i],p=i;
	  }
  g<<max<<'\n';
  do {g<<v[p]<<' ';
	  p=d[p];} while(d[p]);
  g<<v[p]<<'\n';
  f.close(); g.close();
  return 0;
}