#include<fstream>
#include<iostream>
#define lmax 100001
using namespace std;
ifstream f("scmax.in",fstream::in);
ofstream g("scmax.out",fstream::out);
unsigned int a[lmax];
unsigned int b[lmax],p[lmax],n,pmax,maxim=0;
unsigned int x;
void read()
{
    unsigned int i;
    f>>n;
     for(i=1;i<=n;i++)
     {
         f>>a[i];
         b[i]=1;
     }
}
void phd()
{
    unsigned int i,j;
    for(i=2;i<=n;i++)
     for(j=1;j<i;j++)
      if(a[i]>a[j] && b[j]>=b[i])
      {
          b[i]=b[j]+1;p[i]=j;
          if(b[i]>maxim)
           {
               maxim=b[i];
               pmax=i;
           }
      }
}
void show(short int i)
{
    if(p[i]!=0)
     show(p[i]);
     g<<a[i]<<" ";
}
int main()
{   read();
    phd();
    g<<maxim<<"\n";
    show(pmax);
    f.close();
    g.close();
    return 0;
}