#include <fstream>

using namespace std;
ifstream f("scmax.in");
ofstream g("scmax.out");
int r,p[10001],a[10001],v[10001],i,j,Max,n;
void rec()
{
  int i;
  i=r;
  while(i!=-1)
   {
   g<<v[i]<<" ";
   i=p[i];
   }
  }

int main()
{
   f>>n;
   Max=-1;r=n;
   for(i=1;i<=n;i++)
        f>>v[i];
    a[n]=1;
    p[n]=-1;
    for(i=n-1;i>=1;i--){
            a[i]=1;
            p[i]=-1;
                for(j=i;j<=n;j++)
                    if(v[i]<v[j]&&a[i]<a[j]+1){
                        a[i]=a[j]+1;
                        p[i]=j;
                    if(a[i]>Max){
                        r=i;
                        Max=a[i];}}}
        g<<Max<<'\n';
      rec();

    return 0;
}