#include <fstream>

using namespace std;
ifstream fin("scmax.in");
ofstream fout("scmax.out");
int n,v[1001],i,j,k,x[1001],maxim,w;
int main()
{
    fin>>n;
    for(i=1;i<=n;i++)
    {
        fin>>v[i];

    }
    // citirea
    x[n]=1;maxim=0;
    for(i=n-1;i>=1;i--)
    {   k=0;
        for(j=i+1;j<=n;j++)
        {
            if(v[i]<v[j])
                {
                    if(x[j]>k)
                    {
                        k=x[j];
                    }
                }
        }
        x[i]=k+1;
        if(x[i]>maxim)
        {
            maxim=x[i];
            w=i;
        }
    }

   fout<<maxim<<endl;
   fout<<v[w]<<" ";
  for(i=w+1;i<=n;i++)
  {
      if(v[w]<v[i]&&x[w]==x[i]+1)
       {
           fout<<v[i]<<" ";
           w=i;
       }
  }
    return 0;
}