#include<iostream>
#include<fstream>
using namespace std;
long a[100001],poz[100001],l[100001],n,i,j,pozmax,a_de_i;
int main()
{
      ifstream f ("scmax.in");
      ofstream g ("scmax.out");
       long max=INT_MIN;
          f>>n;

        for(i=1;i<=n;i++)

           f>>a[i];
            
               f.close();
           l[n]=1;poz[n]=-1;
           for(i=n-1;i>=1;i--)
           {
                              a_de_i=a[i];
             l[i]=1;
             poz[i]=-1;
            for(j=i+1;j<=n;j++)
              if(a_de_i<a[j] &&l[i]<1+l[j])
                 {l[i]=l[j]+1;poz[i]=j; }
          
          if(l[i]>max)
          {
           max=l[i];
            pozmax=i;
          
          }
          }
          
g<<max<<"\n";
for(i=pozmax;i!=-1;i=poz[i])
    g<<a[i]<<" ";

    g.close();
    return 0;

}