#include<fstream.h>
int l[100003],v[100003],i,n,k,t,max,nr,m;
int main()
{
ifstream f("scmax.in");
ofstream g("scmax.out");
f>>n;
for(i=1;i<=n;i++)
f>>v[i];
l[n]=1;
 for(k=n-1;k>=1;k--)
 {
  max=0;
  for(i=k+1;i<=n;i++)
   if(v[i]>=v[k]&&l[i]>=max)
    max=l[i];
    l[k]=1+max;
 }
 max=l[1];
 t=1;
  for(i=1;i<=n;i++)
   if(l[i]>max)
   {
    max=l[i];
    t=i;
   }
  g<<max<<"\n";
  g<<v[t]<<" ";
  for(i=t+1;i<=n;i++)
  if(v[i]>=v[t]&&l[i]==max-1)
  {
   g<<v[i]<<" ";
   max--;
  }
return 0;
}